{"id":10411,"date":"2024-09-11T02:34:00","date_gmt":"2024-09-10T18:34:00","guid":{"rendered":"https:\/\/app11147.cloudwayssites.com\/?p=10411"},"modified":"2025-02-17T19:05:43","modified_gmt":"2025-02-17T11:05:43","slug":"304-vs-409","status":"publish","type":"post","link":"https:\/\/steelprogroup.com\/vi\/stainless-steel\/grades\/comparisons\/304-vs-409\/","title":{"rendered":"Th\u00e9p kh\u00f4ng g\u1ec9 304 so v\u1edbi 409: \u0110\u1ecbnh ngh\u0129a, T\u00ednh ch\u1ea5t, \u01afu v\u00e0 Nh\u01b0\u1ee3c \u0111i\u1ec3m, \u1ee8ng d\u1ee5ng"},"content":{"rendered":"<p class=\"wp-block-paragraph\">Khi so s\u00e1nh c\u00e1c lo\u1ea1i th\u00e9p kh\u00f4ng g\u1ec9, vi\u1ec7c hi\u1ec3u r\u00f5 \u0111i\u1ec3m m\u1ea1nh c\u1ee7a ch\u00fang l\u00e0 r\u1ea5t quan tr\u1ecdng. Th\u00e9p kh\u00f4ng g\u1ec9 304 c\u00f3 kh\u1ea3 n\u0103ng ch\u1ed1ng \u0103n m\u00f2n t\u1ed1t h\u01a1n 409, do \u0111\u00f3 ph\u00f9 h\u1ee3p h\u01a1n v\u1edbi m\u00f4i tr\u01b0\u1eddng \u1ea9m \u01b0\u1edbt, m\u1eb7c d\u00f9 kh\u00f4ng lo\u1ea1i n\u00e0o ho\u00e0n to\u00e0n ch\u1ed1ng g\u1ec9. Th\u00e9p kh\u00f4ng g\u1ec9 409 c\u00f3 kh\u1ea3 n\u0103ng ch\u1ecbu nhi\u1ec7t t\u1ed1t h\u01a1n, l\u00fd t\u01b0\u1edfng cho c\u00e1c \u1ee9ng d\u1ee5ng nhi\u1ec7t \u0111\u1ed9 cao, m\u1eb7c d\u00f9 304 v\u01b0\u1ee3t tr\u1ed9i h\u01a1n 410 v\u1ec1 m\u1eb7t n\u00e0y. C\u1ea3 304 v\u00e0 409 \u0111\u1ec1u th\u01b0\u1eddng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong h\u1ec7 th\u1ed1ng \u1ed1ng x\u1ea3 do kh\u1ea3 n\u0103ng ch\u1ed1ng \u0103n m\u00f2n v\u00e0 ch\u1ecbu nhi\u1ec7t.<\/p><p class=\"wp-block-paragraph\">Ngo\u00e0i nh\u1eefng \u01b0u v\u00e0 nh\u01b0\u1ee3c \u0111i\u1ec3m n\u00e0y, th\u00e9p kh\u00f4ng g\u1ec9 304 v\u00e0 409 c\u00f2n c\u00f3 nhi\u1ec1u \u0111i\u1ec3m kh\u00e1c bi\u1ec7t h\u01a1n. B\u00e0i vi\u1ebft n\u00e0y s\u1ebd so s\u00e1nh \u0111\u1ecbnh ngh\u0129a, \u0111\u1eb7c t\u00ednh, \u01b0u v\u00e0 nh\u01b0\u1ee3c \u0111i\u1ec3m c\u1ee7a ch\u00fang, c\u0169ng nh\u01b0 c\u00e1ch ch\u00fang ho\u1ea1t \u0111\u1ed9ng trong nhi\u1ec1u \u1ee9ng d\u1ee5ng kh\u00e1c nhau, gi\u00fap b\u1ea1n hi\u1ec3u r\u00f5 h\u01a1n v\u00e0 l\u1ef1a ch\u1ecdn v\u1eadt li\u1ec7u ph\u00f9 h\u1ee3p.<\/p><h2 class=\"wp-block-heading\">Th\u00e9p kh\u00f4ng g\u1ec9 304 \u0111\u01b0\u1ee3c \u0111\u1ecbnh ngh\u0129a nh\u01b0 th\u1ebf n\u00e0o?<\/h2><p class=\"wp-block-paragraph\"><a href=\"https:\/\/steelprogroup.com\/vi\/stainless-steel\/grades\/grade-304\/\">th\u00e9p kh\u00f4ng g\u1ec9 304<\/a> l\u00e0 h\u1ee3p kim austenit c\u00f3 kh\u1ea3 n\u0103ng ch\u1ed1ng \u0103n m\u00f2n v\u00e0 t\u00ednh linh ho\u1ea1t v\u01b0\u1ee3t tr\u1ed9i. V\u1edbi crom 18% v\u00e0 niken 8%, h\u1ee3p kim n\u00e0y b\u1ec1n, kh\u00f4ng nhi\u1ec5m t\u1eeb v\u00e0 d\u1ec5 h\u00e0n. \u0110\u01b0\u1ee3c \u1ee9ng d\u1ee5ng trong nhi\u1ec1u m\u1ee5c \u0111\u00edch kh\u00e1c nhau, h\u1ee3p kim n\u00e0y ch\u1ecbu \u0111\u01b0\u1ee3c nhi\u1ec7t \u0111\u1ed9 l\u00ean t\u1edbi 870\u00b0C. Th\u00e9p kh\u00f4ng g\u1ec9 304 c\u0169ng bao g\u1ed3m c\u00e1c bi\u1ebfn th\u1ec3 nh\u01b0 304L v\u00e0 304H. C\u00e1c bi\u1ebfn th\u1ec3 nh\u01b0 304L c\u1ea3i thi\u1ec7n kh\u1ea3 n\u0103ng h\u00e0n v\u00e0 304H \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf cho c\u00e1c \u0111i\u1ec1u ki\u1ec7n nhi\u1ec7t \u0111\u1ed9 cao.<\/p><h2 class=\"wp-block-heading\">Th\u00e9p kh\u00f4ng g\u1ec9 409 \u0111\u01b0\u1ee3c \u0111\u1ecbnh ngh\u0129a nh\u01b0 th\u1ebf n\u00e0o?<\/h2><p class=\"wp-block-paragraph\"><a href=\"https:\/\/steelprogroup.com\/vi\/stainless-steel\/grades\/grade-409\/\">th\u00e9p kh\u00f4ng g\u1ec9 409<\/a>, c\u00f3 v\u1ebb ngo\u00e0i m\u00e0u x\u00e1m \u0111en, l\u00e0 h\u1ee3p kim ferritic \u0111\u01b0\u1ee3c t\u1ea1o th\u00e0nh t\u1eeb kho\u1ea3ng 90% s\u1eaft v\u00e0 10,5-11,75% crom. N\u00f3 c\u00f3 kh\u1ea3 n\u0103ng ch\u1ecbu nhi\u1ec7t v\u00e0 ch\u1ed1ng \u0103n m\u00f2n v\u1eeba ph\u1ea3i, c\u00f3 t\u1eeb t\u00ednh v\u00e0 gi\u00e1 c\u1ea3 ph\u1ea3i ch\u0103ng h\u01a1n 304. N\u00f3 d\u1ec5 \u0111\u1ecbnh h\u00ecnh v\u00e0 gh\u00e9p n\u1ed1i, l\u00e0m cho n\u00f3 tr\u1edf n\u00ean l\u00fd t\u01b0\u1edfng cho h\u1ec7 th\u1ed1ng x\u1ea3 v\u00e0 b\u1ed9 trao \u0111\u1ed5i nhi\u1ec7t. Th\u01b0\u1eddng \u0111\u01b0\u1ee3c c\u00e1n n\u00f3ng, n\u00f3 bao g\u1ed3m c\u00e1c l\u1edbp n\u1ec1n nh\u01b0 409L, c\u00f3 h\u00e0m l\u01b0\u1ee3ng cacbon th\u1ea5p h\u01a1n \u0111\u1ec3 h\u00e0n t\u1ed1t h\u01a1n.<\/p><h2 class=\"wp-block-heading\">Th\u00e9p kh\u00f4ng g\u1ec9 304 so v\u1edbi 409: Th\u00e0nh ph\u1ea7n h\u00f3a h\u1ecdc<\/h2><p class=\"wp-block-paragraph\">S\u1ef1 kh\u00e1c bi\u1ec7t ch\u00ednh v\u1ec1 m\u1eb7t h\u00f3a h\u1ecdc l\u00e0 th\u00e9p 304 ch\u1ee9a nhi\u1ec1u crom v\u00e0 niken h\u01a1n, mang l\u1ea1i kh\u1ea3 n\u0103ng ch\u1ed1ng \u0103n m\u00f2n t\u1ed1t h\u01a1n. Th\u00e9p 409, v\u1edbi h\u00e0m l\u01b0\u1ee3ng crom th\u1ea5p h\u01a1n v\u00e0 th\u00eam titan, c\u00f3 kh\u1ea3 n\u0103ng ch\u1ed1ng oxy h\u00f3a t\u1ed1t nh\u01b0ng \u0111\u1ed9 b\u1ec1n k\u00e9m h\u01a1n.<\/p><figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><tbody><tr><td><strong>Y\u1ebfu t\u1ed1<\/strong><\/td><td><strong>Th\u00e9p kh\u00f4ng g\u1ec9 304<\/strong><\/td><td><strong>Th\u00e9p kh\u00f4ng g\u1ec9 409<\/strong><\/td><\/tr><tr><td>Crom (Cr)<\/td><td>18-20%<\/td><td>10.5-11.75%<\/td><\/tr><tr><td>Niken (Ni)<\/td><td>8-10.5%<\/td><td>Kh\u00f4ng c\u00f3<\/td><\/tr><tr><td>Cacbon (C)<\/td><td>\u2264 0,08%<\/td><td>\u2264 0,08%<\/td><\/tr><tr><td>Mangan (Mn)<\/td><td>\u2264 2%<\/td><td>\u2264 1,0%<\/td><\/tr><tr><td>Silic (Si)<\/td><td>\u2264 0,75%<\/td><td>\u2264 1,0%<\/td><\/tr><tr><td>Ph\u1ed1t pho (P)<\/td><td>\u2264 0,045%<\/td><td>\u2264 0,04%<\/td><\/tr><tr><td>L\u01b0u hu\u1ef3nh (S)<\/td><td>\u2264 0,03%<\/td><td>\u2264 0,03%<\/td><\/tr><tr><td>Nit\u01a1 (N)<\/td><td>\u2264 0,10%<\/td><td>Kh\u00f4ng c\u00f3<\/td><\/tr><tr><td>S\u1eaft (Fe)<\/td><td>68-71%<\/td><td>85-88%<\/td><\/tr><\/tbody><\/table><\/figure><h3 class=\"wp-block-heading\"><strong>Crom (Cr)<\/strong><\/h3><p class=\"wp-block-paragraph\">Crom r\u1ea5t quan tr\u1ecdng \u0111\u1ed1i v\u1edbi kh\u1ea3 n\u0103ng ch\u1ed1ng \u0103n m\u00f2n. Th\u00e9p kh\u00f4ng g\u1ec9 304 c\u00f3 nhi\u1ec1u crom h\u01a1n th\u00e9p kh\u00f4ng g\u1ec9 409, gi\u00fap ch\u1ed1ng \u0103n m\u00f2n t\u1ed1t h\u01a1n, \u0111\u1eb7c bi\u1ec7t l\u00e0 trong m\u00f4i tr\u01b0\u1eddng kh\u1eafc nghi\u1ec7t.<\/p><h3 class=\"wp-block-heading\"><strong>Niken (Ni)<\/strong><\/h3><p class=\"wp-block-paragraph\">Niken c\u00f3 trong th\u00e9p kh\u00f4ng g\u1ec9 304 nh\u01b0ng kh\u00f4ng c\u00f3 trong th\u00e9p 409. Niken trong th\u00e9p 304 c\u1ea3i thi\u1ec7n kh\u1ea3 n\u0103ng ch\u1ed1ng \u0103n m\u00f2n, kh\u1ea3 n\u0103ng t\u1ea1o h\u00ecnh v\u00e0 kh\u1ea3 n\u0103ng h\u00e0n, khi\u1ebfn th\u00e9p n\u00e0y tr\u1edf n\u00ean l\u00fd t\u01b0\u1edfng cho c\u00e1c \u1ee9ng d\u1ee5ng \u0111\u00f2i h\u1ecfi kh\u1eaft khe h\u01a1n.<\/p><h3 class=\"wp-block-heading\"><strong>Cacbon (C)<\/strong><\/h3><p class=\"wp-block-paragraph\">C\u1ea3 th\u00e9p kh\u00f4ng g\u1ec9 304 v\u00e0 409 \u0111\u1ec1u ch\u1ee9a carbon \u1edf m\u1ee9c t\u01b0\u01a1ng t\u1ef1 nhau. H\u00e0m l\u01b0\u1ee3ng carbon n\u00e0y gi\u00fap t\u0103ng \u0111\u1ed9 b\u1ec1n v\u00e0 \u0111\u1ed9 c\u1ee9ng c\u1ee7a th\u00e9p.<\/p><h3 class=\"wp-block-heading\"><strong>Mangan (Mn)<\/strong><\/h3><p class=\"wp-block-paragraph\">Mangan c\u00f3 trong c\u1ea3 hai lo\u1ea1i th\u00e9p kh\u00f4ng g\u1ec9. Th\u00e9p kh\u00f4ng g\u1ec9 304 ch\u1ee9a nhi\u1ec1u mangan h\u01a1n m\u1ed9t ch\u00fat so v\u1edbi th\u00e9p kh\u00f4ng g\u1ec9 409, gi\u00fap c\u1ea3i thi\u1ec7n \u0111\u1ed9 d\u1ebbo dai v\u00e0 \u0111\u1ed9 c\u1ee9ng.<\/p><h3 class=\"wp-block-heading\"><strong>Silic (Si)<\/strong><\/h3><p class=\"wp-block-paragraph\">Silic c\u00f3 trong c\u1ea3 th\u00e9p kh\u00f4ng g\u1ec9 304 v\u00e0 409. N\u00f3 gi\u00fap t\u0103ng \u0111\u1ed9 b\u1ec1n v\u00e0 kh\u1ea3 n\u0103ng ch\u1ed1ng oxy h\u00f3a c\u1ee7a ch\u00fang. 409 ch\u1ee9a nhi\u1ec1u silic h\u01a1n 304 m\u1ed9t ch\u00fat.<\/p><h3 class=\"wp-block-heading\"><strong>Ph\u1ed1t pho (P) v\u00e0 L\u01b0u hu\u1ef3nh (S)<\/strong><\/h3><p class=\"wp-block-paragraph\">Ph\u1ed1t pho v\u00e0 l\u01b0u hu\u1ef3nh \u0111\u01b0\u1ee3c gi\u1eef \u1edf m\u1ee9c th\u1ea5p trong c\u1ea3 304 v\u00e0 409 \u0111\u1ec3 tr\u00e1nh gi\u00f2n v\u00e0 duy tr\u00ec c\u00e1c \u0111\u1eb7c t\u00ednh c\u01a1 h\u1ecdc t\u1ed1t. M\u1ee9c \u0111\u1ed9 c\u1ee7a ch\u00fang t\u01b0\u01a1ng t\u1ef1 nhau \u1edf c\u1ea3 hai lo\u1ea1i.<\/p><h3 class=\"wp-block-heading\"><strong>Nit\u01a1 (N)<\/strong><\/h3><p class=\"wp-block-paragraph\">Nit\u01a1 c\u00f3 trong th\u00e9p kh\u00f4ng g\u1ec9 304 nh\u01b0ng kh\u00f4ng c\u00f3 trong th\u00e9p kh\u00f4ng g\u1ec9 409. N\u00f3 gi\u00fap t\u0103ng c\u01b0\u1eddng \u0111\u1ed9 b\u1ec1n v\u00e0 kh\u1ea3 n\u0103ng ch\u1ed1ng \u0103n m\u00f2n c\u1ee7a th\u00e9p 304.<\/p><h3 class=\"wp-block-heading\"><strong>S\u1eaft (Fe)<\/strong><\/h3><p class=\"wp-block-paragraph\">H\u00e0m l\u01b0\u1ee3ng s\u1eaft cao h\u01a1n trong 409 d\u1eabn \u0111\u1ebfn t\u1eeb t\u00ednh l\u1edbn h\u01a1n v\u00e0 gi\u1ea3m \u0111\u1ed9 d\u1ebbo so v\u1edbi 304.<\/p><p class=\"wp-block-paragraph\">T\u00f3m l\u1ea1i, th\u00e9p kh\u00f4ng g\u1ec9 304, v\u1edbi h\u00e0m l\u01b0\u1ee3ng crom cao h\u01a1n v\u00e0 niken b\u1ed5 sung, c\u00f3 kh\u1ea3 n\u0103ng ch\u1ed1ng \u0103n m\u00f2n v\u00e0 t\u00ednh linh ho\u1ea1t v\u01b0\u1ee3t tr\u1ed9i. Ng\u01b0\u1ee3c l\u1ea1i, 409 kh\u00f4ng c\u00f3 niken nh\u01b0ng c\u00f3 nhi\u1ec1u silicon h\u01a1n, khi\u1ebfn n\u00f3 c\u00f3 gi\u00e1 c\u1ea3 ph\u1ea3i ch\u0103ng h\u01a1n v\u00e0 t\u1ed1t h\u01a1n cho m\u1ee5c \u0111\u00edch s\u1eed d\u1ee5ng \u1edf nhi\u1ec7t \u0111\u1ed9 cao. 304 v\u01b0\u1ee3t tr\u1ed9i v\u1ec1 kh\u1ea3 n\u0103ng ch\u1ed1ng \u0103n m\u00f2n, trong khi 409 \u0111\u01b0\u1ee3c t\u1ed1i \u01b0u h\u00f3a v\u1ec1 kh\u1ea3 n\u0103ng ch\u1ecbu nhi\u1ec7t v\u00e0 hi\u1ec7u qu\u1ea3 v\u1ec1 chi ph\u00ed.<\/p><h2 class=\"wp-block-heading\">Th\u00e9p kh\u00f4ng g\u1ec9 304 so v\u1edbi 409: T\u00ednh ch\u1ea5t v\u1eadt l\u00fd v\u00e0 c\u01a1 h\u1ecdc<\/h2><p class=\"wp-block-paragraph\">C\u00e1c t\u00ednh ch\u1ea5t v\u1eadt l\u00fd v\u00e0 c\u01a1 h\u1ecdc c\u1ee7a th\u00e9p kh\u00f4ng g\u1ec9 304 v\u00e0 409 kh\u00e1c nhau r\u1ea5t nhi\u1ec1u. Nh\u1eefng kh\u00e1c bi\u1ec7t n\u00e0y \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn \u0111\u1ed9 b\u1ec1n, \u0111\u1ed9 d\u1ebbo v\u00e0 hi\u1ec7u su\u1ea5t c\u1ee7a ch\u00fang trong c\u00e1c \u0111i\u1ec1u ki\u1ec7n kh\u00e1c nhau. Nh\u1eadn bi\u1ebft c\u00e1c \u0111\u1eb7c \u0111i\u1ec3m n\u00e0y l\u00e0 r\u1ea5t quan tr\u1ecdng \u0111\u1ec3 l\u1ef1a ch\u1ecdn th\u00e9p kh\u00f4ng g\u1ec9 ph\u00f9 h\u1ee3p cho c\u00e1c \u1ee9ng d\u1ee5ng c\u1ee5 th\u1ec3.<\/p><h3 class=\"wp-block-heading\">T\u00ednh ch\u1ea5t v\u1eadt l\u00fd c\u1ee7a th\u00e9p kh\u00f4ng g\u1ec9 304 so v\u1edbi 409<\/h3><figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><tbody><tr><td><strong>T\u00e0i s\u1ea3n<\/strong><\/td><td>3<strong>04 Th\u00e9p kh\u00f4ng g\u1ec9<\/strong><\/td><td><strong>Th\u00e9p kh\u00f4ng g\u1ec9 409<\/strong><\/td><\/tr><tr><td>M\u1eadt \u0111\u1ed9 (g\/cm\u00b3)<\/td><td>7.93<\/td><td>7.75<\/td><\/tr><tr><td>\u0110i\u1ec3m n\u00f3ng ch\u1ea3y (\u00b0C)<\/td><td>1400-1450<\/td><td>1425-1510<\/td><\/tr><tr><td>\u0110\u1ed9 d\u1eabn nhi\u1ec7t (W\/m\u00b7K)<\/td><td>16.2<\/td><td>24<\/td><\/tr><tr><td>\u0110i\u1ec7n tr\u1edf su\u1ea5t (\u03a9\u00b7m)<\/td><td>7,2 \u00d7 10\u207b\u2077<\/td><td>5,9 \u00d7 10\u207b\u2077<\/td><\/tr><tr><td>T\u00ednh ch\u1ea5t t\u1eeb t\u00ednh<\/td><td>Kh\u00f4ng c\u00f3 t\u1eeb t\u00ednh (\u1edf tr\u1ea1ng th\u00e1i \u1ee7, c\u00f3 t\u1eeb t\u00ednh nh\u1eb9 sau khi l\u00e0m ngu\u1ed9i)<\/td><td>T\u1eeb t\u00ednh<\/td><\/tr><\/tbody><\/table><\/figure><h4 class=\"wp-block-heading\"><strong>T\u1ec9 tr\u1ecdng<\/strong><\/h4><p class=\"wp-block-paragraph\">Th\u00e9p kh\u00f4ng g\u1ec9 304 \u0111\u1eb7c h\u01a1n th\u00e9p kh\u00f4ng g\u1ec9 409. S\u1ef1 kh\u00e1c bi\u1ec7t n\u00e0y c\u00f3 th\u1ec3 \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn tr\u1ecdng l\u01b0\u1ee3ng t\u1ed5ng th\u1ec3 trong m\u1ed9t s\u1ed1 \u1ee9ng d\u1ee5ng nh\u1ea5t \u0111\u1ecbnh.<\/p><h4 class=\"wp-block-heading\"><strong>\u0110i\u1ec3m n\u00f3ng ch\u1ea3y<\/strong><\/h4><p class=\"wp-block-paragraph\">Th\u00e9p kh\u00f4ng g\u1ec9 409 c\u00f3 gi\u00e1 tr\u1ecb cao h\u01a1n <a href=\"https:\/\/steelprogroup.com\/vi\/stainless-steel\/properties\/melting-point\/\">nhi\u1ec7t \u0111\u1ed9 n\u00f3ng ch\u1ea3y<\/a> h\u01a1n 304, khi\u1ebfn n\u00f3 ph\u00f9 h\u1ee3p h\u01a1n v\u1edbi m\u00f4i tr\u01b0\u1eddng c\u00f3 nhi\u1ec7t \u0111\u1ed9 cao.<\/p><h4 class=\"wp-block-heading\"><strong>\u0110\u1ed9 d\u1eabn nhi\u1ec7t<\/strong><\/h4><p class=\"wp-block-paragraph\">Th\u00e9p kh\u00f4ng g\u1ec9 409 d\u1eabn nhi\u1ec7t t\u1ed1t h\u01a1n th\u00e9p kh\u00f4ng g\u1ec9 304, \u0111i\u1ec1u n\u00e0y h\u1eefu \u00edch trong c\u00e1c \u1ee9ng d\u1ee5ng c\u1ea7n truy\u1ec1n nhi\u1ec7t hi\u1ec7u qu\u1ea3, nh\u01b0 h\u1ec7 th\u1ed1ng x\u1ea3.<\/p><h4 class=\"wp-block-heading\"><strong>\u0110i\u1ec7n tr\u1edf su\u1ea5t<\/strong><\/h4><p class=\"wp-block-paragraph\">Th\u00e9p kh\u00f4ng g\u1ec9 304 c\u00f3 \u0111i\u1ec7n tr\u1edf l\u1edbn h\u01a1n, l\u00e0m cho n\u00f3 \u00edt d\u1eabn \u0111i\u1ec7n h\u01a1n. \u0110i\u1ec1u n\u00e0y c\u00f3 l\u1ee3i trong nh\u1eefng tr\u01b0\u1eddng h\u1ee3p c\u1ea7n c\u00e1ch \u0111i\u1ec7n.<\/p><h4 class=\"wp-block-heading\"><strong>T\u00ednh ch\u1ea5t t\u1eeb t\u00ednh<\/strong><\/h4><p class=\"wp-block-paragraph\">SS 304 kh\u00f4ng c\u00f3 t\u1eeb t\u00ednh trong \u0111i\u1ec1u ki\u1ec7n \u1ee7, c\u00f3 th\u1ec3 c\u00f3 t\u1eeb t\u00ednh nh\u1eb9 sau khi l\u00e0m ngu\u1ed9i; SS 409 c\u00f3 <a href=\"https:\/\/steelprogroup.com\/vi\/stainless-steel\/properties\/magnetic\/\">T\u1eeb t\u00ednh<\/a> trong m\u1ecdi \u0111i\u1ec1u ki\u1ec7n do h\u00e0m l\u01b0\u1ee3ng s\u1eaft cao h\u01a1n.<\/p><p class=\"wp-block-paragraph\">T\u00f3m l\u1ea1i, th\u00e9p kh\u00f4ng g\u1ec9 304 \u0111\u1eb7c h\u01a1n, \u00edt d\u1eabn \u0111i\u1ec7n h\u01a1n v\u00e0 d\u1ec5 u\u1ed1n h\u01a1n, l\u00e0m cho n\u00f3 t\u1ed1t h\u01a1n cho c\u00e1c \u1ee9ng d\u1ee5ng c\u1ea7n t\u00ednh linh ho\u1ea1t v\u00e0 kh\u1ea3 n\u0103ng ch\u1ed1ng \u0103n m\u00f2n. M\u1eb7t kh\u00e1c, th\u00e9p kh\u00f4ng g\u1ec9 409 c\u00f3 \u0111i\u1ec3m n\u00f3ng ch\u1ea3y cao h\u01a1n, \u0111\u1ed9 d\u1eabn nhi\u1ec7t t\u1ed1t h\u01a1n v\u00e0 ph\u00f9 h\u1ee3p h\u01a1n v\u1edbi m\u00f4i tr\u01b0\u1eddng nhi\u1ec7t \u0111\u1ed9 cao, n\u01a1i hi\u1ec7u qu\u1ea3 v\u1ec1 chi ph\u00ed v\u00e0 \u0111\u1ed9 b\u1ec1n l\u00e0 y\u1ebfu t\u1ed1 quan tr\u1ecdng.<\/p><h3 class=\"wp-block-heading\">T\u00ednh ch\u1ea5t c\u01a1 h\u1ecdc c\u1ee7a th\u00e9p kh\u00f4ng g\u1ec9 304 so v\u1edbi 409<\/h3><figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><tbody><tr><td><strong>T\u00e0i s\u1ea3n<\/strong><\/td><td><strong>Th\u00e9p kh\u00f4ng g\u1ec9 304<\/strong><\/td><td><strong>Th\u00e9p kh\u00f4ng g\u1ec9 409<\/strong><\/td><\/tr><tr><td>\u0110\u1ed9 b\u1ec1n k\u00e9o<\/td><td>505 MPa (73,2 ksi)<\/td><td>450 MPa (65,3 ksi)<\/td><\/tr><tr><td>S\u1ee9c ch\u1ecbu l\u1ef1c<\/td><td>215 MPa (31,2 ksi)<\/td><td>240 MPa (34,8 ksi)<\/td><\/tr><tr><td>\u0110\u1ed9 c\u1ee9ng (Rockwell B)<\/td><td>70-90<\/td><td>65-85<\/td><\/tr><tr><td>\u0110\u1ed9 gi\u00e3n d\u00e0i (%)<\/td><td>40%<\/td><td>20%<\/td><\/tr><tr><td>M\u00f4 \u0111un \u0111\u00e0n h\u1ed3i<\/td><td>193-200 GPa (28,0-29,0 x 10\u00b3 ksi)<\/td><td>200 GPa (29,0 x 10\u00b3 ksi)<\/td><\/tr><\/tbody><\/table><\/figure><h4 class=\"wp-block-heading\"><strong>\u0110\u1ed9 b\u1ec1n k\u00e9o<\/strong><\/h4><p class=\"wp-block-paragraph\">Th\u00e9p kh\u00f4ng g\u1ec9 304 c\u00f3 \u0111\u1ed9 b\u1ec1n k\u00e9o cao h\u01a1n so v\u1edbi 409. \u0110i\u1ec1u n\u00e0y c\u00f3 ngh\u0129a l\u00e0 304 c\u00f3 th\u1ec3 ch\u1ecbu \u0111\u01b0\u1ee3c l\u1ef1c l\u1edbn h\u01a1n tr\u01b0\u1edbc khi g\u00e3y, khi\u1ebfn n\u00f3 b\u1ec1n h\u01a1n trong c\u00e1c \u1ee9ng d\u1ee5ng y\u00eau c\u1ea7u \u0111\u1ed9 b\u1ec1n k\u00e9o cao.<\/p><h4 class=\"wp-block-heading\"><strong>S\u1ee9c ch\u1ecbu l\u1ef1c<\/strong><\/h4><p class=\"wp-block-paragraph\">Th\u00e9p kh\u00f4ng g\u1ec9 409 c\u00f3 gi\u1edbi h\u1ea1n ch\u1ea3y cao h\u01a1n m\u1ed9t ch\u00fat so v\u1edbi th\u00e9p 304. \u0110i\u1ec1u n\u00e0y cho th\u1ea5y th\u00e9p 409 c\u00f3 kh\u1ea3 n\u0103ng ch\u1ed1ng bi\u1ebfn d\u1ea1ng v\u0129nh vi\u1ec5n khi ch\u1ecbu \u1ee9ng su\u1ea5t t\u1ed1t h\u01a1n, khi\u1ebfn n\u00f3 ph\u00f9 h\u1ee3p h\u01a1n cho c\u00e1c \u1ee9ng d\u1ee5ng \u0111\u00f2i h\u1ecfi \u0111\u1ed9 b\u1ec1n ch\u1ecbu t\u1ea3i.<\/p><h4 class=\"wp-block-heading\"><strong>\u0110\u1ed9 c\u1ee9ng<\/strong><\/h4><p class=\"wp-block-paragraph\">C\u1ea3 th\u00e9p kh\u00f4ng g\u1ec9 304 v\u00e0 409 \u0111\u1ec1u c\u00f3 \u0111\u1eb7c \u0111i\u1ec3m t\u01b0\u01a1ng t\u1ef1 <a href=\"https:\/\/steelprogroup.com\/vi\/stainless-steel\/properties\/hardness\/\">\u0111\u1ed9 c\u1ee9ng<\/a> m\u1ee9c \u0111\u1ed9, trong \u0111\u00f3 304 c\u1ee9ng h\u01a1n m\u1ed9t ch\u00fat theo thang Rockwell B. S\u1ef1 kh\u00e1c bi\u1ec7t nh\u1ecf n\u00e0y c\u00f3 ngh\u0129a l\u00e0 304 c\u00f3 kh\u1ea3 n\u0103ng ch\u1ed1ng m\u00e0i m\u00f2n b\u1ec1 m\u1eb7t v\u00e0 v\u1ebft l\u00f5m t\u1ed1t h\u01a1n m\u1ed9t ch\u00fat.<\/p><h4 class=\"wp-block-heading\"><strong>\u0110\u1ed9 gi\u00e3n d\u00e0i<\/strong><\/h4><p class=\"wp-block-paragraph\">Th\u00e9p kh\u00f4ng g\u1ec9 304 c\u00f3 \u0111\u1ed9 gi\u00e3n d\u00e0i l\u1edbn h\u01a1n nhi\u1ec1u so v\u1edbi th\u00e9p 409. \u0110\u1ed9 gi\u00e3n d\u00e0i cao h\u01a1n n\u00e0y cho ph\u00e9p th\u00e9p 304 gi\u00e3n d\u00e0i h\u01a1n tr\u01b0\u1edbc khi \u0111\u1ee9t, khi\u1ebfn th\u00e9p n\u00e0y d\u1ec5 u\u1ed1n h\u01a1n v\u00e0 d\u1ec5 t\u1ea1o th\u00e0nh c\u00e1c h\u00ecnh d\u1ea1ng ph\u1ee9c t\u1ea1p h\u01a1n.<\/p><h4 class=\"wp-block-heading\"><strong>M\u00f4 \u0111un \u0111\u00e0n h\u1ed3i<\/strong><\/h4><p class=\"wp-block-paragraph\">M\u00f4 \u0111un \u0111\u00e0n h\u1ed3i t\u01b0\u01a1ng \u0111\u01b0\u01a1ng nhau \u0111\u1ed1i v\u1edbi c\u1ea3 th\u00e9p kh\u00f4ng g\u1ec9 304 v\u00e0 409. C\u1ea3 hai v\u1eadt li\u1ec7u \u0111\u1ec1u c\u00f3 \u0111\u1ed9 c\u1ee9ng t\u01b0\u01a1ng \u0111\u01b0\u01a1ng, ngh\u0129a l\u00e0 ch\u00fang ch\u1ed1ng bi\u1ebfn d\u1ea1ng d\u01b0\u1edbi \u1ee9ng su\u1ea5t \u1edf m\u1ee9c \u0111\u1ed9 t\u01b0\u01a1ng t\u1ef1 nhau.<\/p><p class=\"wp-block-paragraph\">T\u00f3m l\u1ea1i, th\u00e9p kh\u00f4ng g\u1ec9 304 c\u00f3 \u0111\u1ed9 b\u1ec1n k\u00e9o v\u00e0 \u0111\u1ed9 gi\u00e3n d\u00e0i cao h\u01a1n, khi\u1ebfn n\u00f3 b\u1ec1n h\u01a1n v\u00e0 d\u1ebbo h\u01a1n. M\u1eb7t kh\u00e1c, th\u00e9p kh\u00f4ng g\u1ec9 409 c\u00f3 \u0111\u1ed9 b\u1ec1n k\u00e9o t\u1ed1t h\u01a1n m\u1ed9t ch\u00fat, khi\u1ebfn n\u00f3 b\u1ec1n h\u01a1n khi ch\u1ecbu \u1ee9ng su\u1ea5t. C\u1ea3 hai \u0111\u1ec1u c\u00f3 \u0111\u1ed9 c\u1ee9ng v\u00e0 \u0111\u1ed9 c\u1ee9ng t\u01b0\u01a1ng t\u1ef1, nh\u01b0ng 304 t\u1ed1t h\u01a1n m\u1ed9t ch\u00fat cho c\u00e1c \u1ee9ng d\u1ee5ng c\u1ea7n \u0111\u1ed9 linh ho\u1ea1t v\u00e0 \u0111\u1ed9 b\u1ec1n.<\/p><h2 class=\"wp-block-heading\">\u01afu v\u00e0 nh\u01b0\u1ee3c \u0111i\u1ec3m c\u1ee7a 409 SS so v\u1edbi 304 SS<\/h2><p class=\"wp-block-paragraph\">Nh\u1eadn bi\u1ebft \u0111\u01b0\u1ee3c nh\u1eefng \u01b0u \u0111i\u1ec3m v\u00e0 nh\u01b0\u1ee3c \u0111i\u1ec3m c\u1ee7a th\u00e9p kh\u00f4ng g\u1ec9 304 v\u00e0 409 c\u00f3 th\u1ec3 gi\u00fap b\u1ea1n l\u1ef1a ch\u1ecdn v\u1eadt li\u1ec7u ph\u00f9 h\u1ee3p cho m\u1ee5c \u0111\u00edch s\u1eed d\u1ee5ng c\u1ee5 th\u1ec3. D\u01b0\u1edbi \u0111\u00e2y l\u00e0 ph\u00e2n t\u00edch \u01b0u v\u00e0 nh\u01b0\u1ee3c \u0111i\u1ec3m ch\u00ednh c\u1ee7a t\u1eebng lo\u1ea1i.<\/p><h3 class=\"wp-block-heading\">\u01afu \u0111i\u1ec3m c\u1ee7a th\u00e9p kh\u00f4ng g\u1ec9 304<\/h3><ul class=\"wp-block-list\"><li>Kh\u1ea3 n\u0103ng ch\u1ed1ng \u0103n m\u00f2n tuy\u1ec7t v\u1eddi<\/li>\n\n<li>\u0110\u1ed9 b\u1ec1n v\u00e0 \u0111\u1ed9 b\u1ec1n k\u00e9o cao<\/li>\n\n<li>Kh\u00f4ng t\u1eeb t\u00ednh v\u00e0 \u0111\u1eb9p v\u1ec1 m\u1eb7t th\u1ea9m m\u1ef9<\/li>\n\n<li>Kh\u1ea3 n\u0103ng \u0111\u1ecbnh h\u00ecnh v\u00e0 k\u00e9o d\u00e0i t\u1ed1t<\/li><\/ul><h3 class=\"wp-block-heading\">Nh\u01b0\u1ee3c \u0111i\u1ec3m c\u1ee7a th\u00e9p kh\u00f4ng g\u1ec9 304<\/h3><ul class=\"wp-block-list\"><li>Chi ph\u00ed cao h\u01a1n 409<\/li>\n\n<li>\u00cdt ch\u1ecbu nhi\u1ec7t<\/li>\n\n<li>C\u00f3 th\u1ec3 kh\u00f3 h\u00e0n trong m\u1ed9t s\u1ed1 \u0111i\u1ec1u ki\u1ec7n<\/li><\/ul><h3 class=\"wp-block-heading\">\u01afu \u0111i\u1ec3m c\u1ee7a th\u00e9p kh\u00f4ng g\u1ec9 409<\/h3><ul class=\"wp-block-list\"><li>Gi\u00e1 c\u1ea3 ph\u1ea3i ch\u0103ng h\u01a1n<\/li>\n\n<li>Kh\u1ea3 n\u0103ng ch\u1ecbu nhi\u1ec7t t\u1ed1t h\u01a1n<\/li>\n\n<li>D\u1ec5 h\u00e0n v\u00e0 t\u1ea1o h\u00ecnh h\u01a1n<\/li><\/ul><h3 class=\"wp-block-heading\">Nh\u01b0\u1ee3c \u0111i\u1ec3m c\u1ee7a th\u00e9p kh\u00f4ng g\u1ec9 409<\/h3><ul class=\"wp-block-list\"><li>Kh\u1ea3 n\u0103ng ch\u1ed1ng \u0103n m\u00f2n th\u1ea5p h\u01a1n<\/li>\n\n<li>\u0110\u1ed9 b\u1ec1n k\u00e9o v\u00e0 \u0111\u1ed9 gi\u00e3n d\u00e0i th\u1ea5p h\u01a1n<\/li>\n\n<li>D\u1ec5 b\u1ecb r\u1ec9 s\u00e9t h\u01a1n trong m\u00f4i tr\u01b0\u1eddng kh\u1eafc nghi\u1ec7t<\/li><\/ul><p class=\"wp-block-paragraph\">T\u00f3m l\u1ea1i, th\u00e9p kh\u00f4ng g\u1ec9 304 v\u01b0\u1ee3t tr\u1ed9i v\u1ec1 kh\u1ea3 n\u0103ng ch\u1ed1ng \u0103n m\u00f2n v\u00e0 \u0111\u1ed9 b\u1ec1n, trong khi 409 c\u00f3 gi\u00e1 c\u1ea3 ph\u1ea3i ch\u0103ng h\u01a1n v\u00e0 t\u1ed1t h\u01a1n cho c\u00e1c \u1ee9ng d\u1ee5ng nhi\u1ec7t \u0111\u1ed9 cao. M\u1ed7i lo\u1ea1i c\u00f3 \u01b0u \u0111i\u1ec3m v\u00e0 nh\u01b0\u1ee3c \u0111i\u1ec3m ri\u00eang, khi\u1ebfn ch\u00fang ph\u00f9 h\u1ee3p v\u1edbi nhi\u1ec1u \u1ee9ng d\u1ee5ng kh\u00e1c nhau.<\/p><h2 class=\"wp-block-heading\">T\u1ea1i sao 304 l\u00e0 th\u00e9p kh\u00f4ng g\u1ec9 t\u1ed1t nh\u1ea5t cho \u1ed1ng x\u1ea3?<\/h2><p class=\"wp-block-paragraph\">C\u1ea3 th\u00e9p kh\u00f4ng g\u1ec9 409 v\u00e0 304 \u0111\u1ec1u th\u01b0\u1eddng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong h\u1ec7 th\u1ed1ng \u1ed1ng x\u1ea3 \u00f4 t\u00f4, nh\u01b0ng ch\u00fang ph\u1ee5c v\u1ee5 c\u00e1c m\u1ee5c \u0111\u00edch kh\u00e1c nhau. Trong khi th\u00e9p kh\u00f4ng g\u1ec9 409 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng r\u1ed9ng r\u00e3i do t\u00ednh hi\u1ec7u qu\u1ea3 v\u1ec1 chi ph\u00ed, th\u00ec th\u00e9p kh\u00f4ng g\u1ec9 304 l\u00e0 l\u1ef1a ch\u1ecdn \u01b0u ti\u00ean cho c\u00e1c h\u1ec7 th\u1ed1ng \u1ed1ng x\u1ea3 ch\u1ea5t l\u01b0\u1ee3ng cao. D\u01b0\u1edbi \u0111\u00e2y, ch\u00fang ta s\u1ebd kh\u00e1m ph\u00e1 l\u00fd do t\u1ea1i sao 304 l\u00e0 v\u1eadt li\u1ec7u v\u01b0\u1ee3t tr\u1ed9i cho c\u00e1c \u1ee9ng d\u1ee5ng \u1ed1ng x\u1ea3 \u0111\u00f2i h\u1ecfi kh\u1eaft khe.<\/p><h3 class=\"wp-block-heading\">Kh\u1ea3 n\u0103ng ch\u1ed1ng \u0103n m\u00f2n v\u01b0\u1ee3t tr\u1ed9i:&nbsp;<\/h3><p class=\"wp-block-paragraph\">Th\u00e9p kh\u00f4ng g\u1ec9 304 cung c\u1ea5p t\u1ed1t h\u01a1n <a href=\"https:\/\/steelprogroup.com\/vi\/stainless-steel\/properties\/corrosion-resistant\/\">kh\u1ea3 n\u0103ng ch\u1ed1ng \u0103n m\u00f2n<\/a> h\u01a1n 409. \u0110i\u1ec1u n\u00e0y r\u1ea5t quan tr\u1ecdng \u0111\u1ed1i v\u1edbi h\u1ec7 th\u1ed1ng \u1ed1ng x\u1ea3 ti\u1ebfp x\u00fac v\u1edbi \u0111\u1ed9 \u1ea9m v\u00e0 mu\u1ed1i tr\u00ean \u0111\u01b0\u1eddng, \u0111\u1ea3m b\u1ea3o h\u1ec7 th\u1ed1ng s\u1eed d\u1ee5ng \u0111\u01b0\u1ee3c l\u00e2u h\u01a1n.<\/p><h3 class=\"wp-block-heading\">T\u0103ng c\u01b0\u1eddng s\u1ee9c m\u1ea1nh v\u00e0 \u0111\u1ed9 b\u1ec1n:&nbsp;<\/h3><p class=\"wp-block-paragraph\">Ngay c\u1ea3 trong h\u1ec7 th\u1ed1ng \u1ed1ng x\u1ea3 409, c\u00e1c b\u1ed9 ph\u1eadn nh\u1ecf nh\u01b0 \u0111\u1ea7u \u1ed1ng x\u1ea3, m\u1eb7t b\u00edch v\u00e0 bu l\u00f4ng th\u01b0\u1eddng \u0111\u01b0\u1ee3c l\u00e0m t\u1eeb th\u00e9p 304. \u0110i\u1ec1u n\u00e0y l\u00e0 do th\u00e9p 304 c\u00f3 \u0111\u1ee7 \u0111\u1ed9 b\u1ec1n c\u1ea7n thi\u1ebft \u0111\u1ec3 ch\u1ecbu \u0111\u01b0\u1ee3c \u0111i\u1ec1u ki\u1ec7n kh\u1eafc nghi\u1ec7t.<\/p><h3 class=\"wp-block-heading\">Kh\u1ea3 n\u0103ng ch\u1ecbu nhi\u1ec7t t\u1ed1t h\u01a1n:&nbsp;<\/h3><p class=\"wp-block-paragraph\">Th\u00e9p kh\u00f4ng g\u1ec9 304 c\u00f3 th\u1ec3 ch\u1ecbu \u0111\u01b0\u1ee3c nhi\u1ec7t \u0111\u1ed9 cao h\u01a1n th\u00e9p 409. \u0110i\u1ec1u n\u00e0y l\u00e0m cho n\u00f3 tr\u1edf n\u00ean ho\u00e0n h\u1ea3o cho c\u00e1c h\u1ec7 th\u1ed1ng x\u1ea3 hi\u1ec7u su\u1ea5t cao, tr\u00e1nh bi\u1ebfn d\u1ea1ng d\u01b0\u1edbi nhi\u1ec7t \u0111\u1ed9 cao.<\/p><h3 class=\"wp-block-heading\">Tu\u1ed5i th\u1ecd d\u00e0i h\u01a1n:&nbsp;<\/h3><p class=\"wp-block-paragraph\">Th\u00e9p kh\u00f4ng g\u1ec9 304 c\u00f3 gi\u00e1 cao h\u01a1n nh\u01b0ng b\u1ec1n h\u01a1n. N\u00f3 th\u01b0\u1eddng b\u1ec1n h\u01a1n <strong>8 \u0111\u1ebfn 10 n\u0103m ho\u1eb7c h\u01a1n<\/strong> trong h\u1ec7 th\u1ed1ng x\u1ea3, \u0111\u1eb7c bi\u1ec7t l\u00e0 trong m\u00f4i tr\u01b0\u1eddng \u1ea9m \u01b0\u1edbt ho\u1eb7c m\u1eb7n. K\u1ebft c\u1ea5u ch\u1eafc ch\u1eafn v\u00e0 kh\u1ea3 n\u0103ng ch\u1ed1ng \u0103n m\u00f2n \u0111\u1ea3m b\u1ea3o hi\u1ec7u su\u1ea5t l\u00e2u d\u00e0i. So s\u00e1nh, <strong>Th\u00e9p kh\u00f4ng g\u1ec9 409 c\u00f3 \u0111\u1ed9 b\u1ec1n kho\u1ea3ng 5 \u0111\u1ebfn 8 n\u0103m<\/strong>. N\u00f3 ho\u1ea1t \u0111\u1ed9ng t\u1ed1t \u1edf nh\u1eefng khu v\u1ef1c c\u00f3 nhi\u1ec7t \u0111\u1ed9 cao nh\u01b0ng nhanh b\u1ecb r\u1ec9 s\u00e9t h\u01a1n trong \u0111i\u1ec1u ki\u1ec7n \u1ea9m \u01b0\u1edbt ho\u1eb7c \u0103n m\u00f2n.<\/p><h3 class=\"wp-block-heading\">S\u1ef1 h\u1ea5p d\u1eabn v\u1ec1 m\u1eb7t th\u1ea9m m\u1ef9:&nbsp;<\/h3><p class=\"wp-block-paragraph\">Th\u00e9p kh\u00f4ng g\u1ec9 304 tr\u00f4ng \u0111\u1eb9p h\u01a1n theo th\u1eddi gian. N\u00f3 ch\u1ed1ng x\u1ec9n m\u00e0u v\u00e0 \u0111\u1ed5i m\u00e0u, gi\u1eef cho c\u00e1c b\u1ed9 ph\u1eadn d\u1ec5 th\u1ea5y c\u1ee7a h\u1ec7 th\u1ed1ng x\u1ea3 tr\u00f4ng s\u00e1ng b\u00f3ng. Ng\u01b0\u1ee3c l\u1ea1i, th\u00e9p kh\u00f4ng g\u1ec9 409 c\u00f3 xu h\u01b0\u1edbng b\u1ecb r\u1ec9 s\u00e9t v\u00e0 \u0111\u1ed5i m\u00e0u theo th\u1eddi gian, \u0111\u1eb7c bi\u1ec7t l\u00e0 trong m\u00f4i tr\u01b0\u1eddng kh\u1eafc nghi\u1ec7t, d\u1eabn \u0111\u1ebfn v\u1ebb ngo\u00e0i k\u00e9m b\u00f3ng b\u1ea9y h\u01a1n.<\/p><p class=\"wp-block-paragraph\">T\u00f3m l\u1ea1i, trong khi th\u00e9p kh\u00f4ng g\u1ec9 409 l\u00e0 l\u1ef1a ch\u1ecdn ph\u1ea3i ch\u0103ng h\u01a1n th\u00ec th\u00e9p kh\u00f4ng g\u1ec9 304 l\u1ea1i c\u00f3 hi\u1ec7u su\u1ea5t, \u0111\u1ed9 b\u1ec1n v\u00e0 v\u1ebb ngo\u00e0i t\u1ed1t h\u01a1n, khi\u1ebfn n\u00f3 tr\u1edf th\u00e0nh l\u1ef1a ch\u1ecdn h\u00e0ng \u0111\u1ea7u cho c\u00e1c h\u1ec7 th\u1ed1ng \u1ed1ng x\u1ea3 ch\u1ea5t l\u01b0\u1ee3ng cao.<\/p><h3 class=\"wp-block-heading\">Th\u00e9p kh\u00f4ng g\u1ec9 409 c\u00f3 t\u1ed1t cho \u1ed1ng x\u1ea3 kh\u00f4ng?<\/h3><p class=\"wp-block-paragraph\">M\u1eb7c d\u00f9 409 kh\u00f4ng m\u1ea1nh b\u1eb1ng 304 \u0111\u1ed1i v\u1edbi h\u1ec7 th\u1ed1ng \u1ed1ng x\u1ea3, nh\u01b0ng n\u00f3 ho\u1ea1t \u0111\u1ed9ng t\u1ed1t \u1edf nh\u1eefng n\u01a1i kh\u00f4 r\u00e1o. Th\u00eam v\u00e0o \u0111\u00f3, 409 h\u1eefu \u00edch trong c\u00e1c \u1ee9ng d\u1ee5ng nhi\u1ec7t \u0111\u1ed9 cao kh\u00e1c ngo\u00e0i h\u1ec7 th\u1ed1ng \u1ed1ng x\u1ea3, ch\u1eb3ng h\u1ea1n nh\u01b0 \u1ed1ng gi\u1ea3m thanh, b\u1ed9 chuy\u1ec3n \u0111\u1ed5i x\u00fac t\u00e1c v\u00e0 t\u1ea5m ch\u1eafn nhi\u1ec7t trong c\u00e1c b\u1ed9 ph\u1eadn \u00f4 t\u00f4, n\u01a1i c\u1ea7n kh\u1ea3 n\u0103ng ch\u1ed1ng \u0103n m\u00f2n v\u1eeba ph\u1ea3i v\u00e0 nhi\u1ec7t \u0111\u1ed9 cao.<\/p><h2 class=\"wp-block-heading\">\u1ee8ng d\u1ee5ng c\u1ee7a th\u00e9p kh\u00f4ng g\u1ec9 409 so v\u1edbi 304<\/h2><p class=\"wp-block-paragraph\">Th\u00e9p kh\u00f4ng g\u1ec9 304 v\u00e0 409 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong nhi\u1ec1u ng\u00e0nh c\u00f4ng nghi\u1ec7p kh\u00e1c nhau, m\u1ed7i lo\u1ea1i \u0111\u01b0\u1ee3c l\u1ef1a ch\u1ecdn v\u00ec c\u00e1c \u0111\u1eb7c t\u00ednh ri\u00eang bi\u1ec7t c\u1ee7a n\u00f3. D\u01b0\u1edbi \u0111\u00e2y l\u00e0 c\u00e1c \u1ee9ng d\u1ee5ng ph\u1ed5 bi\u1ebfn cho t\u1eebng lo\u1ea1i.<\/p><h3 class=\"wp-block-heading\">\u1ee8ng d\u1ee5ng c\u1ee7a th\u00e9p kh\u00f4ng g\u1ec9 304<\/h3><ul class=\"wp-block-list\"><li><strong>Ng\u00e0nh c\u00f4ng nghi\u1ec7p \u00f4 t\u00f4<\/strong>: B\u1ed9 gi\u1ea3m thanh, \u1ed1ng x\u1ea3, khung v\u00e0 k\u1ebft c\u1ea5u h\u1ed7 tr\u1ee3, khung c\u1eeda s\u1ed5, v.v.<\/li>\n\n<li><strong>Ng\u00e0nh th\u1ef1c ph\u1ea9m v\u00e0 \u0111\u1ed3 u\u1ed1ng<\/strong>: \u0110\u01b0\u1ee3c s\u1eed d\u1ee5ng trong c\u00e1c v\u1eadt d\u1ee5ng nh\u01b0 b\u1ed3n r\u1eeda, qu\u1ea7y b\u1ebfp v\u00e0 b\u1ec3 ch\u1ee9a do c\u00f3 kh\u1ea3 n\u0103ng ch\u1ed1ng \u0103n m\u00f2n v\u01b0\u1ee3t tr\u1ed9i.<\/li>\n\n<li><strong>Thi\u1ebft b\u1ecb y t\u1ebf<\/strong>:\u0110\u01b0\u1ee3c \u01b0a chu\u1ed9ng d\u00f9ng cho d\u1ee5ng c\u1ee5 ph\u1eabu thu\u1eadt v\u00e0 c\u1ea5y gh\u00e9p v\u00ec \u0111\u1ed9 b\u1ec1n v\u00e0 kh\u00f4ng ph\u1ea3n \u1ee9ng.<\/li>\n\n<li><strong>X\u1eed l\u00fd h\u00f3a h\u1ecdc<\/strong>: Th\u00edch h\u1ee3p cho b\u1ec3 ch\u1ee9a, \u0111\u01b0\u1eddng \u1ed1ng v\u00e0 b\u1ed9 trao \u0111\u1ed5i nhi\u1ec7t, n\u01a1i kh\u1ea3 n\u0103ng ch\u1ed1ng \u0103n m\u00f2n l\u00e0 r\u1ea5t quan tr\u1ecdng.<\/li>\n\n<li><strong>\u1ee8ng d\u1ee5ng ki\u1ebfn tr\u00fac<\/strong>: \u0110\u01b0\u1ee3c s\u1eed d\u1ee5ng trong lan can, t\u1ea5m \u1ed1p v\u00e0 \u0111\u1ed3 trang tr\u00ed v\u00ec t\u00ednh th\u1ea9m m\u1ef9 v\u00e0 kh\u1ea3 n\u0103ng ch\u1ed1ng ch\u1ecbu th\u1eddi ti\u1ebft.<\/li><\/ul><h3 class=\"wp-block-heading\">\u1ee8ng d\u1ee5ng c\u1ee7a th\u00e9p kh\u00f4ng g\u1ec9 409<\/h3><ul class=\"wp-block-list\"><li><strong>Ng\u00e0nh c\u00f4ng nghi\u1ec7p \u00f4 t\u00f4<\/strong>:Th\u01b0\u1eddng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong h\u1ec7 th\u1ed1ng \u1ed1ng x\u1ea3 v\u00e0 \u1ed1ng gi\u1ea3m thanh v\u00ec kh\u1ea3 n\u0103ng ch\u1ecbu nhi\u1ec7t v\u00e0 gi\u00e1 c\u1ea3 ph\u1ea3i ch\u0103ng.<\/li>\n\n<li><strong>Thi\u1ebft b\u1ecb n\u00f4ng nghi\u1ec7p<\/strong>: \u0110\u01b0\u1ee3c s\u1eed d\u1ee5ng trong c\u00e1c linh ki\u1ec7n y\u00eau c\u1ea7u kh\u1ea3 n\u0103ng ch\u1ed1ng \u0103n m\u00f2n v\u1eeba ph\u1ea3i v\u00e0 c\u00f3 th\u1ec3 ch\u1ecbu \u0111\u01b0\u1ee3c m\u00f4i tr\u01b0\u1eddng ngo\u00e0i tr\u1eddi.<\/li>\n\n<li><strong>B\u1ed9 trao \u0111\u1ed5i nhi\u1ec7t<\/strong>: Th\u00edch h\u1ee3p cho c\u00e1c h\u1ec7 th\u1ed1ng c\u1ea7n \u0111\u1ed9 d\u1eabn nhi\u1ec7t t\u1ed1t v\u00e0 kh\u1ea3 n\u0103ng ch\u1ed1ng \u0103n m\u00f2n v\u1eeba ph\u1ea3i.<\/li>\n\n<li><strong>C\u00e1c th\u00e0nh ph\u1ea7n l\u00f2<\/strong>: \u0110\u01b0\u1ee3c s\u1eed d\u1ee5ng khi c\u1ea7n \u0111\u1ed9 b\u1ec1n \u1edf nhi\u1ec7t \u0111\u1ed9 cao, ch\u1eb3ng h\u1ea1n nh\u01b0 trong l\u1edbp l\u00f3t l\u00f2 v\u00e0 \u0111\u1ea7u \u0111\u1ed1t.<\/li><\/ul><p class=\"wp-block-paragraph\">Th\u00e9p kh\u00f4ng g\u1ec9 304 l\u00fd t\u01b0\u1edfng cho c\u00e1c \u1ee9ng d\u1ee5ng ch\u1ed1ng \u0103n m\u00f2n v\u00e0 b\u1ec1n b\u1ec9 nh\u01b0 ch\u1ebf bi\u1ebfn th\u1ef1c ph\u1ea9m, y t\u1ebf v\u00e0 c\u00f4ng nghi\u1ec7p h\u00f3a ch\u1ea5t. Ng\u01b0\u1ee3c l\u1ea1i, 409 ph\u00f9 h\u1ee3p h\u01a1n cho c\u00e1c \u1ee9ng d\u1ee5ng nhi\u1ec7t \u0111\u1ed9 cao, nh\u1ea1y c\u1ea3m v\u1edbi chi ph\u00ed nh\u01b0 h\u1ec7 th\u1ed1ng \u1ed1ng x\u1ea3 \u00f4 t\u00f4. Tuy nhi\u00ean, 304 th\u01b0\u1eddng ph\u00f9 h\u1ee3p h\u01a1n 409 cho \u0111\u01b0\u1eddng \u1ed1ng x\u1ea3 \u00f4 t\u00f4 do kh\u1ea3 n\u0103ng ch\u1ed1ng \u0103n m\u00f2n v\u01b0\u1ee3t tr\u1ed9i.<\/p><h2 class=\"wp-block-heading\">Th\u00e9p kh\u00f4ng g\u1ec9 304 hay 409 t\u1ed1t h\u01a1n?<\/h2><p class=\"wp-block-paragraph\">304 t\u1ed1t h\u01a1n v\u1ec1 kh\u1ea3 n\u0103ng ch\u1ed1ng \u0103n m\u00f2n v\u00e0 tu\u1ed5i th\u1ecd, trong khi 409 c\u00f3 gi\u00e1 c\u1ea3 ph\u1ea3i ch\u0103ng h\u01a1n v\u00e0 ph\u00f9 h\u1ee3p v\u1edbi c\u00e1c \u1ee9ng d\u1ee5ng nhi\u1ec7t \u0111\u1ed9 cao. L\u1ef1a ch\u1ecdn ph\u1ee5 thu\u1ed9c v\u00e0o m\u00f4i tr\u01b0\u1eddng v\u00e0 ng\u00e2n s\u00e1ch.<\/p><h2 class=\"wp-block-heading\">Th\u00e9p kh\u00f4ng g\u1ec9 304 c\u00f3 ph\u1ea3i l\u00e0 t\u1ed1t nh\u1ea5t kh\u00f4ng?<\/h2><p class=\"wp-block-paragraph\">304 l\u00e0 m\u1ed9t trong nh\u1eefng lo\u1ea1i th\u00e9p t\u1ed1t nh\u1ea5t v\u1ec1 kh\u1ea3 n\u0103ng ch\u1ed1ng \u0103n m\u00f2n v\u00e0 t\u00ednh linh ho\u1ea1t, nh\u01b0ng s\u1ef1 l\u1ef1a ch\u1ecdn \u201ct\u1ed1t nh\u1ea5t\u201d ph\u1ee5 thu\u1ed9c v\u00e0o nhu c\u1ea7u c\u1ee5 th\u1ec3 c\u1ee7a b\u1ea1n.<\/p><h2 class=\"wp-block-heading\">\u0110i\u1ec3m y\u1ebfu c\u1ee7a th\u00e9p kh\u00f4ng g\u1ec9 304 l\u00e0 g\u00ec?<\/h2><p class=\"wp-block-paragraph\">Th\u00e9p 304 \u0111\u1eaft h\u01a1n, kh\u1ea3 n\u0103ng ch\u1ecbu nhi\u1ec7t k\u00e9m h\u01a1n v\u00e0 kh\u00f3 h\u00e0n h\u01a1n trong m\u1ed9t s\u1ed1 \u0111i\u1ec1u ki\u1ec7n.<\/p><h2 class=\"wp-block-heading\">Th\u00e9p kh\u00f4ng g\u1ec9 409 c\u00f3 b\u1ecb g\u1ec9 kh\u00f4ng?<\/h2><p class=\"wp-block-paragraph\">C\u00f3, th\u00e9p kh\u00f4ng g\u1ec9 409 c\u00f3 th\u1ec3 b\u1ecb g\u1ec9, \u0111\u1eb7c bi\u1ec7t l\u00e0 trong m\u00f4i tr\u01b0\u1eddng \u1ea9m \u01b0\u1edbt ho\u1eb7c c\u00f3 mu\u1ed1i, do h\u00e0m l\u01b0\u1ee3ng crom th\u1ea5p h\u01a1n so v\u1edbi th\u00e9p kh\u00f4ng g\u1ec9 304.<\/p><p class=\"wp-block-paragraph\"><strong>\u0110\u1ecdc li\u00ean quan<\/strong><br><a href=\"https:\/\/steelprogroup.com\/vi\/stainless-steel\/rust\/\">Th\u00e9p kh\u00f4ng g\u1ec9 c\u00f3 b\u1ecb g\u1ec9 kh\u00f4ng?<\/a><\/p><h2 class=\"wp-block-heading\">Th\u00e9p kh\u00f4ng g\u1ec9 409 c\u00f3 t\u1eeb t\u00ednh kh\u00f4ng?<\/h2><p class=\"wp-block-paragraph\">C\u00f3, th\u00e9p kh\u00f4ng g\u1ec9 409 c\u00f3 t\u00ednh t\u1eeb t\u00ednh do c\u1ea5u tr\u00fac ferritic c\u1ee7a n\u00f3.<\/p><h2 class=\"wp-block-heading\">T\u00f3m t\u1eaft v\u00e0 c\u00e1c b\u01b0\u1edbc ti\u1ebfp theo \u0111\u1ec3 l\u1ef1a ch\u1ecdn th\u00e9p kh\u00f4ng g\u1ec9 ph\u00f9 h\u1ee3p<\/h2><p class=\"wp-block-paragraph\">T\u00f3m l\u1ea1i, th\u00e9p kh\u00f4ng g\u1ec9 304 v\u00e0 409 c\u00f3 nh\u1eefng \u0111\u1eb7c \u0111i\u1ec3m ri\u00eang bi\u1ec7t l\u00fd t\u01b0\u1edfng cho c\u00e1c \u1ee9ng d\u1ee5ng kh\u00e1c nhau. 304 c\u00f3 kh\u1ea3 n\u0103ng ch\u1ed1ng \u0103n m\u00f2n v\u00e0 \u0111\u1ed9 b\u1ec1n v\u01b0\u1ee3t tr\u1ed9i, khi\u1ebfn n\u00f3 tr\u1edf n\u00ean ho\u00e0n h\u1ea3o cho c\u00e1c m\u00f4i tr\u01b0\u1eddng c\u00f3 \u0111i\u1ec1u ki\u1ec7n kh\u1eaft khe. Ng\u01b0\u1ee3c l\u1ea1i, 409 c\u00f3 kh\u1ea3 n\u0103ng ch\u1ecbu nhi\u1ec7t v\u00e0 hi\u1ec7u qu\u1ea3 v\u1ec1 chi ph\u00ed t\u1ed1t h\u01a1n, khi\u1ebfn n\u00f3 ph\u00f9 h\u1ee3p v\u1edbi c\u00e1c \u1ee9ng d\u1ee5ng nhi\u1ec7t \u0111\u1ed9 cao v\u00e0 nh\u1ea1y c\u1ea3m v\u1edbi ng\u00e2n s\u00e1ch nh\u01b0 h\u1ec7 th\u1ed1ng x\u1ea3.<\/p><p class=\"wp-block-paragraph\">\u0110\u1ec3 bi\u1ebft th\u00eam th\u00f4ng tin v\u1ec1 vi\u1ec7c l\u1ef1a ch\u1ecdn th\u00e9p kh\u00f4ng g\u1ec9 t\u1ed1t nh\u1ea5t cho d\u1ef1 \u00e1n c\u1ee7a b\u1ea1n, <a href=\"https:\/\/steelprogroup.com\/vi\">T\u1eadp \u0111o\u00e0n SteelPRO<\/a> c\u00f3 th\u1ec3 cung c\u1ea5p gi\u1ea3i ph\u00e1p. <a href=\"https:\/\/steelprogroup.com\/vi\/contact-us\/\">Li\u00ean h\u1ec7 v\u1edbi ch\u00fang t\u00f4i \u0111\u1ec3 c\u00f3 b\u00e1o gi\u00e1 th\u1ecfa \u0111\u00e1ng<\/a>.<\/p>","protected":false},"excerpt":{"rendered":"<p>When comparing stainless steel grades, understanding their strengths is crucial. 304 stainless steel is more corrosion-resistant than 409, making it [&hellip;]<\/p>","protected":false},"author":1,"featured_media":10399,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"_eb_attr":"","rank_math_lock_modified_date":false,"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center 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