{"id":10290,"date":"2024-09-11T11:45:00","date_gmt":"2024-09-11T03:45:00","guid":{"rendered":"https:\/\/app11147.cloudwayssites.com\/?p=10290"},"modified":"2025-02-17T19:03:27","modified_gmt":"2025-02-17T11:03:27","slug":"grade-409","status":"publish","type":"post","link":"https:\/\/steelprogroup.com\/vi\/stainless-steel\/grades\/grade-409\/","title":{"rendered":"Th\u00e9p kh\u00f4ng g\u1ec9 409: \u0110\u1ecbnh ngh\u0129a, Th\u00e0nh ph\u1ea7n, T\u00ednh ch\u1ea5t, \u0110\u1eb7c \u0111i\u1ec3m ch\u1ebf bi\u1ebfn, \u1ee8ng d\u1ee5ng v\u00e0 h\u01a1n th\u1ebf n\u1eefa"},"content":{"rendered":"<h2 class=\"wp-block-heading\">Th\u00e9p kh\u00f4ng g\u1ec9 409 l\u00e0 g\u00ec?<\/h2><p>409, c\u00f2n \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 UNS S40900, l\u00e0 d\u00f2ng 400 <a href=\"https:\/\/steelprogroup.com\/vi\/stainless-steel\/type\/ferritic\/\">th\u00e9p kh\u00f4ng g\u1ec9 ferritic<\/a> ch\u1ee7 y\u1ebfu bao g\u1ed3m crom (10,5-11,75%) v\u1edbi m\u1ed9t l\u01b0\u1ee3ng nh\u1ecf cacbon (\u22640,08%) v\u00e0 titan b\u1ed5 sung (\u22640,75%). 409 tu\u00e2n th\u1ee7 c\u00e1c ti\u00eau chu\u1ea9n nh\u01b0 ASTM A240 \u0111\u1ed1i v\u1edbi t\u1ea5m, l\u00e1 v\u00e0 d\u1ea3i v\u00e0 t\u01b0\u01a1ng \u0111\u01b0\u01a1ng v\u1edbi 1,4512 (EN). N\u00f3 \u0111\u00e1ng ch\u00fa \u00fd v\u00ec kh\u1ea3 n\u0103ng ch\u1ed1ng oxy h\u00f3a v\u00e0 \u0103n m\u00f2n tuy\u1ec7t v\u1eddi \u1edf nhi\u1ec7t \u0111\u1ed9 cao, \u0111\u1eb7c bi\u1ec7t l\u00e0 trong ph\u1ea1m vi 400-600 \u00b0 C. C\u00e1c \u1ee9ng d\u1ee5ng ph\u1ed5 bi\u1ebfn bao g\u1ed3m h\u1ec7 th\u1ed1ng \u1ed1ng x\u1ea3 \u00f4 t\u00f4, b\u1ed9 trao \u0111\u1ed5i nhi\u1ec7t v\u00e0 thi\u1ebft b\u1ecb. 409 c\u00f3 kh\u1ea3 n\u0103ng ch\u1ed1ng \u0103n m\u00f2n th\u1ea5p h\u01a1n so v\u1edbi c\u00e1c lo\u1ea1i austenit nh\u01b0 304 ho\u1eb7c 316. N\u00f3 th\u01b0\u1eddng \u0111\u01b0\u1ee3c x\u1eed l\u00fd th\u00f4ng qua c\u00e1n ngu\u1ed9i, h\u00e0n, t\u1ea1o h\u00ecnh, v.v., \u0111\u1ec3 \u0111\u1ea1t \u0111\u01b0\u1ee3c h\u00ecnh d\u1ea1ng v\u00e0 t\u00ednh ch\u1ea5t c\u01a1 h\u1ecdc mong mu\u1ed1n.&nbsp;<\/p><h2 class=\"wp-block-heading\">Th\u00e0nh ph\u1ea7n h\u00f3a h\u1ecdc c\u1ee7a th\u00e9p kh\u00f4ng g\u1ec9 409<\/h2><p>Th\u00e0nh ph\u1ea7n h\u00f3a h\u1ecdc c\u1ee7a th\u00e9p kh\u00f4ng g\u1ec9 409 \u0111\u01b0\u1ee3c li\u1ec7t k\u00ea nh\u01b0 sau:<\/p><figure class=\"wp-block-table\"><table><tbody><tr><td><strong>Y\u1ebfu t\u1ed1<\/strong><\/td><td><strong>Cacbon, C<\/strong><\/td><td><strong>Crom, Cr<\/strong><\/td><td><strong>Mangan, Mn<\/strong><\/td><td><strong>Ph\u1ed1t pho, P<\/strong><\/td><td><strong>Silic, Si<\/strong><\/td><td><strong>L\u01b0u hu\u1ef3nh, S<\/strong><\/td><td><strong>Titan, Ti<\/strong><\/td><td><strong>S\u1eaft, Fe<\/strong><\/td><\/tr><tr><td>N\u1ed9i dung (%)<\/td><td>\u2264 0,080<\/td><td>11.13<\/td><td>\u2264 1.0<\/td><td>\u2264 0,045<\/td><td>\u2264 1.0<\/td><td>\u2264 0,045<\/td><td>0.75<\/td><td>S\u1ef1 c\u00e2n b\u1eb1ng<\/td><\/tr><\/tbody><\/table><\/figure><h2 class=\"wp-block-heading\">T\u00ednh ch\u1ea5t c\u1ee7a th\u00e9p kh\u00f4ng g\u1ec9 409<\/h2><p>Sau \u0111\u00e2y l\u00e0 ba l\u00fd do ch\u00ednh khi\u1ebfn th\u00e9p kh\u00f4ng g\u1ec9 409 tr\u1edf n\u00ean \u0111\u1ed9c \u0111\u00e1o:<\/p><ol class=\"wp-block-list\"><li>Kh\u1ea3 n\u0103ng ch\u1ed1ng \u0103n m\u00f2n tuy\u1ec7t v\u1eddi, \u0111\u1eb7c bi\u1ec7t l\u00e0 trong h\u1ec7 th\u1ed1ng x\u1ea3.<\/li>\n\n<li>D\u1ec5 h\u00e0n v\u00e0 t\u1ea1o th\u00e0nh nhi\u1ec1u h\u00ecnh d\u1ea1ng kh\u00e1c nhau.<\/li>\n\n<li>Ti\u1ebft ki\u1ec7m chi ph\u00ed h\u01a1n so v\u1edbi c\u00e1c lo\u1ea1i th\u00e9p kh\u00f4ng g\u1ec9 kh\u00e1c.<\/li><\/ol><h3 class=\"wp-block-heading\">T\u00ednh ch\u1ea5t v\u1eadt l\u00fd<\/h3><p>Ki\u1ec3m tra b\u1ea3ng d\u01b0\u1edbi \u0111\u00e2y \u0111\u1ec3 bi\u1ebft c\u00e1c t\u00ednh ch\u1ea5t v\u1eadt l\u00fd c\u1ed1t l\u00f5i c\u1ee7a th\u00e9p kh\u00f4ng g\u1ec9 409:<\/p><figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><tbody><tr><td><strong>T\u00e0i s\u1ea3n<\/strong><\/td><td><strong>Gi\u00e1 tr\u1ecb (\u0110\u01a1n v\u1ecb \u0111o l\u01b0\u1eddng)<\/strong><\/td><td><strong>Gi\u00e1 tr\u1ecb (Anh)<\/strong><\/td><\/tr><tr><td>T\u1ec9 tr\u1ecdng<\/td><td>7,80 g\/cc<\/td><td>0,282 lb\/in\u00b3<\/td><\/tr><tr><td>\u0110i\u1ec3m n\u00f3ng ch\u1ea3y<\/td><td>1425 \u2013 1510 \u00b0C<\/td><td>2597 \u2013 2750 \u00b0F<\/td><\/tr><tr><td>CTE, Tuy\u1ebfn t\u00ednh (20,0 \u2013 100 \u00b0C \/ 68,0 \u2013 212 \u00b0F)<\/td><td>11,7 \u00b5m\/m-\u00b0C<\/td><td>6,50 \u00b5in\/in-\u00b0F<\/td><\/tr><tr><td>CTE, Tuy\u1ebfn t\u00ednh (20,0 \u2013 260 \u00b0C \/ 68,0 \u2013 500 \u00b0F)<\/td><td>11,9 \u00b5m\/m-\u00b0C<\/td><td>6,61 \u00b5in\/in-\u00b0F<\/td><\/tr><tr><td>CTE, Tuy\u1ebfn t\u00ednh (20,0 \u2013 480 \u00b0C \/ 68,0 \u2013 896 \u00b0F)<\/td><td>12,4 \u00b5m\/m-\u00b0C<\/td><td>6,89 \u00b5in\/in-\u00b0F<\/td><\/tr><tr><td>CTE, Tuy\u1ebfn t\u00ednh (20,0 \u2013 650 \u00b0C \/ 68,0 \u2013 1200 \u00b0F)<\/td><td>12,9 \u00b5m\/m-\u00b0C<\/td><td>7,17 \u00b5in\/in-\u00b0F<\/td><\/tr><tr><td>CTE, Tuy\u1ebfn t\u00ednh (20,0 \u2013 815 \u00b0C \/ 68,0 \u2013 1500 \u00b0F)<\/td><td>13,5 \u00b5m\/m-\u00b0C<\/td><td>7,50 \u00b5in\/in-\u00b0F<\/td><\/tr><tr><td>Nhi\u1ec7t dung ri\u00eang (0,0 \u2013 100 \u00b0C \/ 32,0 \u2013 212 \u00b0F)<\/td><td>0,460 J\/g-\u00b0C<\/td><td>0,110 BTU\/lb-\u00b0F<\/td><\/tr><tr><td>\u0110\u1ed9 d\u1eabn nhi\u1ec7t (95,0 \u00b0C \/ 203 \u00b0F)<\/td><td>24,9 W\/mK<\/td><td>173 BTU-in\/gi\u1edd-ft\u00b2-\u00b0F<\/td><\/tr><tr><td>\u0110\u1ed9 d\u1eabn nhi\u1ec7t (540 \u00b0C \/ 1000 \u00b0F)<\/td><td>28,6 W\/mK<\/td><td>198 BTU-in\/gi\u1edd-ft\u00b2-\u00b0F<\/td><\/tr><tr><td>\u0110i\u1ec7n tr\u1edf su\u1ea5t (20,0 \u00b0C \/ 68,0 \u00b0F)<\/td><td>0,0000600 ohm-cm<\/td><td>0,0000600 ohm-cm<\/td><\/tr><tr><td>T\u00ednh ch\u1ea5t t\u1eeb t\u00ednh<\/td><td>T\u1eeb t\u00ednh do c\u1ea5u tr\u00fac ferritic<\/td><td>\/<\/td><\/tr><\/tbody><\/table><\/figure><h3 class=\"wp-block-heading\">T\u00ednh ch\u1ea5t c\u01a1 h\u1ecdc<\/h3><p>Ki\u1ec3m tra b\u1ea3ng d\u01b0\u1edbi \u0111\u00e2y \u0111\u1ec3 bi\u1ebft c\u00e1c t\u00ednh ch\u1ea5t c\u01a1 h\u1ecdc c\u1ed1t l\u00f5i c\u1ee7a th\u00e9p kh\u00f4ng g\u1ec9 409:<\/p><figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><tbody><tr><td><strong>T\u00e0i s\u1ea3n<\/strong><\/td><td><strong>Gi\u00e1 tr\u1ecb<\/strong><\/td><td><strong>Hi\u1ec7u su\u1ea5t<\/strong><\/td><\/tr><tr><td>\u0110\u1ed9 b\u1ec1n k\u00e9o<\/td><td>448 MPa (65 ksi)<\/td><td>Trung b\u00ecnh; th\u1ea5p h\u01a1n \u0111i\u1ec3m 304 v\u00e0 316<\/td><\/tr><tr><td>Gi\u1edbi h\u1ea1n ch\u1ea3y (\u0110\u1ed9 bi\u1ebfn d\u1ea1ng 0,2%)<\/td><td>238 MPa (34,5 ksi)<\/td><td>Ph\u00f9 h\u1ee3p cho m\u1ee5c \u0111\u00edch s\u1eed d\u1ee5ng k\u1ebft c\u1ea5u chung<\/td><\/tr><tr><td>\u0110\u1ed9 c\u1ee9ng Brinell (HB)<\/td><td>143<\/td><td rowspan=\"3\">\u0110\u1ed9 c\u1ee9ng v\u1eeba ph\u1ea3i; m\u1ec1m h\u01a1n th\u00e9p c\u01b0\u1eddng \u0111\u1ed9 cao nh\u01b0 316, kh\u1ea3 n\u0103ng t\u1ea1o h\u00ecnh t\u1ed1t h\u01a1n<\/td><\/tr><tr><td>\u0110\u1ed9 c\u1ee9ng Rockwell (HRB)<\/td><td>72<\/td><\/tr><tr><td>\u0110\u1ed9 c\u1ee9ng Vickers (HV)<\/td><td>155<\/td><\/tr><tr><td>\u0110\u1ed9 gi\u00e3n d\u00e0i khi \u0111\u1ee9t (t\u00ednh b\u1eb1ng 50 mm)<\/td><td>32.50%<\/td><td>\u0110\u1ed9 d\u1ebbo t\u1ed1t, d\u1ec5 t\u1ea1o h\u00ecnh<\/td><\/tr><tr><td>M\u00f4 \u0111un Young<\/td><td>200 GPa (29 Msi)<\/td><td>\u0110i\u1ec3n h\u00ecnh cho th\u00e9p kh\u00f4ng g\u1ec9, c\u1ee9ng<\/td><\/tr><\/tbody><\/table><\/figure><h3 class=\"wp-block-heading\">T\u00ednh ch\u1ea5t h\u00f3a h\u1ecdc<\/h3><p>Ki\u1ec3m tra b\u1ea3ng d\u01b0\u1edbi \u0111\u00e2y \u0111\u1ec3 bi\u1ebft c\u00e1c t\u00ednh ch\u1ea5t h\u00f3a h\u1ecdc c\u1ed1t l\u00f5i c\u1ee7a th\u00e9p kh\u00f4ng g\u1ec9 409:<\/p><figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><tbody><tr><td><strong>T\u00ednh ch\u1ea5t h\u00f3a h\u1ecdc<\/strong><\/td><td><strong>S\u1ef1 mi\u00eau t\u1ea3<\/strong><\/td><td><strong>Hi\u1ec7u su\u1ea5t<\/strong><\/td><\/tr><tr><td>Ch\u1ed1ng \u0103n m\u00f2n<\/td><td>Kh\u1ea3 n\u0103ng ch\u1ed1ng l\u1ea1i s\u1ef1 suy tho\u00e1i c\u1ee7a m\u00f4i tr\u01b0\u1eddng.<\/td><td>Trung b\u00ecnh, th\u1ea5p h\u01a1n 304 nh\u01b0ng ph\u00f9 h\u1ee3p v\u1edbi m\u00f4i tr\u01b0\u1eddng nh\u1eb9 v\u00e0 kh\u00ed th\u1ea3i.<\/td><\/tr><tr><td>\u0110\u1ed9 nh\u1ea1y pH<\/td><td>Ph\u1ea3n \u1ee9ng v\u1edbi m\u00f4i tr\u01b0\u1eddng axit ho\u1eb7c baz\u01a1.<\/td><td>\u1ed4n \u0111\u1ecbnh trong m\u00f4i tr\u01b0\u1eddng trung t\u00ednh\/h\u01a1i axit; k\u00e9m b\u1ec1n trong m\u00f4i tr\u01b0\u1eddng axit m\u1ea1nh.<\/td><\/tr><tr><td>Ph\u1ea3n \u1ee9ng<\/td><td>C\u00f3 xu h\u01b0\u1edbng ph\u1ea3n \u1ee9ng v\u1edbi h\u00f3a ch\u1ea5t ho\u1eb7c kh\u00ed.<\/td><td>\u0110\u1ed9 ph\u1ea3n \u1ee9ng th\u1ea5p, l\u00fd t\u01b0\u1edfng cho m\u1ee5c \u0111\u00edch s\u1eed d\u1ee5ng \u00f4 t\u00f4.<\/td><\/tr><tr><td>Kh\u1ea3 n\u0103ng ch\u1ed1ng oxy h\u00f3a<\/td><td>Kh\u1ea3 n\u0103ng ch\u1ed1ng oxy h\u00f3a \u1edf nhi\u1ec7t \u0111\u1ed9 cao.<\/td><td>Ch\u1ecbu \u0111\u01b0\u1ee3c nhi\u1ec7t \u0111\u1ed9 li\u00ean t\u1ee5c l\u00ean t\u1edbi 675\u00b0C, ch\u1ecbu \u0111\u01b0\u1ee3c nhi\u1ec7t \u0111\u1ed9 kh\u00f4ng li\u00ean t\u1ee5c l\u00ean t\u1edbi 815\u00b0C.<\/td><\/tr><tr><td>th\u1ee5 \u0111\u1ed9ng h\u00f3a<\/td><td>Kh\u1ea3 n\u0103ng h\u00ecnh th\u00e0nh l\u1edbp oxit b\u1ea3o v\u1ec7.<\/td><td>H\u00ecnh th\u00e0nh t\u1ef1 nhi\u00ean nh\u01b0ng k\u00e9m hi\u1ec7u qu\u1ea3 h\u01a1n lo\u1ea1i 304\/316.<\/td><\/tr><tr><td>Kh\u1ea3 n\u0103ng ch\u00e1y<\/td><td>Kh\u1ea3 n\u0103ng b\u1eaft l\u1eeda.<\/td><td>Kh\u00f4ng ch\u00e1y, an to\u00e0n khi s\u1eed d\u1ee5ng trong c\u00f4ng nghi\u1ec7p.<\/td><\/tr><tr><td>T\u00ednh d\u1ec5 ch\u00e1y<\/td><td>C\u00f3 xu h\u01b0\u1edbng d\u1ec5 b\u1ed1c ch\u00e1y.<\/td><td>Kh\u00f4ng b\u1eaft l\u1eeda, \u0111\u1ea3m b\u1ea3o an to\u00e0n ph\u00f2ng ch\u00e1y ch\u1eefa ch\u00e1y.<\/td><\/tr><\/tbody><\/table><\/figure><h2 class=\"wp-block-heading\">Kh\u1ea3 n\u0103ng ch\u1ecbu nhi\u1ec7t v\u00e0 \u0103n m\u00f2n c\u1ee7a th\u00e9p kh\u00f4ng g\u1ec9 409<\/h2><h3 class=\"wp-block-heading\">Kh\u1ea3 n\u0103ng ch\u1ecbu nhi\u1ec7t<\/h3><p>Th\u00e9p kh\u00f4ng g\u1ec9 409 c\u00f3 kh\u1ea3 n\u0103ng ch\u1ecbu nhi\u1ec7t t\u1ed1t. N\u00f3 c\u00f3 th\u1ec3 ch\u1ed1ng \u0111\u00f3ng c\u1eb7n khi s\u1eed d\u1ee5ng li\u00ean t\u1ee5c l\u00ean \u0111\u1ebfn 675\u00b0C v\u00e0 l\u00ean \u0111\u1ebfn 815\u00b0C khi s\u1eed d\u1ee5ng kh\u00f4ng li\u00ean t\u1ee5c.<\/p><h3 class=\"wp-block-heading\">Ch\u1ed1ng \u0103n m\u00f2n<\/h3><p>Th\u00e9p kh\u00f4ng g\u1ec9 409 c\u00f3 kh\u1ea3 n\u0103ng ch\u1ed1ng \u0103n m\u00f2n t\u1ed1t, \u0111\u1eb7c bi\u1ec7t l\u00e0 trong m\u00f4i tr\u01b0\u1eddng kh\u00ed quy\u1ec3n v\u00e0 kh\u00ed th\u1ea3i. M\u1ed9t l\u1edbp g\u1ec9 nh\u1eb9 c\u00f3 th\u1ec3 h\u00ecnh th\u00e0nh, gi\u00fap l\u00e0m ch\u1eadm qu\u00e1 tr\u00ecnh \u0103n m\u00f2n ti\u1ebfp theo nh\u01b0ng \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn v\u1ebb ngo\u00e0i c\u1ee7a b\u1ec1 m\u1eb7t.&nbsp;<\/p><p>Th\u00e9p kh\u00f4ng g\u1ec9 409 c\u00f3 kh\u1ea3 n\u0103ng ch\u1ed1ng \u0103n m\u00f2n t\u1ed1t h\u01a1n th\u00e9p kh\u00f4ng g\u1ec9 410 nh\u01b0ng kh\u00f4ng b\u1ec1n b\u1eb1ng th\u00e9p kh\u00f4ng g\u1ec9 430 c\u00f3 h\u00e0m l\u01b0\u1ee3ng crom cao h\u01a1n. Th\u00e9p 409 ph\u00f9 h\u1ee3p cho c\u00e1c \u1ee9ng d\u1ee5ng kh\u00f4ng trang tr\u00ed, c\u1ea7n kh\u1ea3 n\u0103ng ch\u1ed1ng \u0103n m\u00f2n \u1edf m\u1ee9c v\u1eeba ph\u1ea3i.<\/p><h2 class=\"wp-block-heading\">\u0110\u1eb7c \u0111i\u1ec3m x\u1eed l\u00fd c\u1ee7a th\u00e9p kh\u00f4ng g\u1ec9 409<\/h2><h3 class=\"wp-block-heading\">Kh\u1ea3 n\u0103ng \u0111\u1ecbnh h\u00ecnh<\/h3><p>Th\u00e9p kh\u00f4ng g\u1ec9 409 c\u00f3 kh\u1ea3 n\u0103ng \u0111\u1ecbnh h\u00ecnh t\u1ed1t nh\u01b0ng k\u00e9m linh ho\u1ea1t h\u01a1n th\u00e9p kh\u00f4ng g\u1ec9 austenit. C\u00e1c quy tr\u00ecnh nh\u01b0 k\u00e9o ho\u1eb7c k\u00e9o gi\u00e3n n\u00ean \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n \u1edf nhi\u1ec7t \u0111\u1ed9 ph\u00f2ng \u0111\u1ec3 \u0111\u1ea1t \u0111\u01b0\u1ee3c k\u1ebft qu\u1ea3 t\u1ed1t h\u01a1n. C\u00f3 th\u1ec3 c\u1ea7n nhi\u1ec1u l\u1ef1c h\u01a1n ho\u1eb7c c\u00e1c c\u00f4ng c\u1ee5 chuy\u00ean d\u1ee5ng \u0111\u1ec3 \u0111\u1ecbnh h\u00ecnh. \u1ee6 sau khi \u0111\u1ecbnh h\u00ecnh c\u00f3 th\u1ec3 gi\u00fap kh\u00f4i ph\u1ee5c c\u00e1c \u0111\u1eb7c t\u00ednh c\u1ee7a n\u00f3 do qu\u00e1 tr\u00ecnh l\u00e0m c\u1ee9ng.<\/p><h3 class=\"wp-block-heading\">Kh\u1ea3 n\u0103ng h\u00e0n<\/h3><p>Th\u00e9p kh\u00f4ng g\u1ec9 409 c\u00f3 kh\u1ea3 n\u0103ng h\u00e0n t\u1ed1t nh\u01b0ng v\u1eabn c\u1ea7n c\u00f3 m\u1ed9t s\u1ed1 bi\u1ec7n ph\u00e1p ph\u00f2ng ng\u1eeba.<\/p><ul class=\"wp-block-list\"><li>L\u00e0m n\u00f3ng tr\u01b0\u1edbc \u1edf nhi\u1ec7t \u0111\u1ed9 150-260\u00b0C gi\u00fap gi\u1ea3m thi\u1ec3u nguy c\u01a1 n\u1ee9t.&nbsp;<\/li>\n\n<li>S\u1eed d\u1ee5ng v\u1eadt li\u1ec7u \u0111\u1ed9n th\u00edch h\u1ee3p nh\u01b0 409 Cb, 409 Ti ho\u1eb7c 430L gi\u00fap duy tr\u00ec kh\u1ea3 n\u0103ng ch\u1ed1ng \u0103n m\u00f2n v\u00e0 \u0111\u1ed9 b\u1ec1n.<\/li>\n\n<li>\u1ee6 sau khi h\u00e0n \u1edf nhi\u1ec7t \u0111\u1ed9 760\u00b0C c\u00f3 th\u1ec3 l\u00e0m gi\u1ea3m \u1ee9ng su\u1ea5t v\u00e0 c\u1ea3i thi\u1ec7n \u0111\u1ed9 d\u1ebbo. <em>*Kh\u00f4ng b\u1eaft bu\u1ed9c \u0111\u1ed1i v\u1edbi c\u00e1c ph\u1ea7n h\u00e0n m\u1ecfng.<\/em><\/li>\n\n<li>Gi\u1eef nhi\u1ec7t \u0111\u1ed9 gi\u1eefa c\u00e1c l\u1edbp d\u01b0\u1edbi 150\u00b0C \u0111\u1ec3 tr\u00e1nh b\u1ecb gi\u00f2n.<\/li>\n\n<li>Do h\u00e0m l\u01b0\u1ee3ng crom cao n\u00ean c\u1ea7n c\u00f3 kh\u00ed b\u1ea3o v\u1ec7 nh\u01b0 argon \u0111\u1ec3 ng\u0103n ng\u1eeba qu\u00e1 tr\u00ecnh oxy h\u00f3a.<\/li>\n\n<li>\u1ed0ng x\u1ea3 \u00f4 t\u00f4 th\u01b0\u1eddng \u0111\u01b0\u1ee3c h\u00e0n m\u00e0 kh\u00f4ng c\u1ea7n s\u1eed d\u1ee5ng kim lo\u1ea1i ph\u1ee5.<\/li><\/ul><h3 class=\"wp-block-heading\">\u0110\u1ed9 c\u1ee9ng<\/h3><p>Th\u00e9p kh\u00f4ng g\u1ec9 409 c\u00f3 \u0111\u1ed9 c\u1ee9ng th\u1ea5p v\u00e0 kh\u00f4ng th\u1ec3 t\u00f4i luy\u1ec7n b\u1eb1ng c\u00e1ch x\u1eed l\u00fd nhi\u1ec7t. N\u00f3 v\u1eabn m\u1ec1m ngay c\u1ea3 sau khi gia nhi\u1ec7t.<\/p><p>Th\u00e9p kh\u00f4ng g\u1ec9 409 th\u01b0\u1eddng \u0111\u01b0\u1ee3c \u1ee7 \u1edf nhi\u1ec7t \u0111\u1ed9 t\u1eeb 790\u00b0C \u2013 900\u00b0C (1450\u00b0F \u2013 1650\u00b0F), sau \u0111\u00f3 th\u01b0\u1eddng \u0111\u01b0\u1ee3c l\u00e0m m\u00e1t b\u1eb1ng kh\u00f4ng kh\u00ed.<\/p><h2 class=\"wp-block-heading\">\u01afu \u0111i\u1ec3m v\u00e0 nh\u01b0\u1ee3c \u0111i\u1ec3m c\u1ee7a th\u00e9p kh\u00f4ng g\u1ec9 409<\/h2><p>Sau \u0111\u00e2y l\u00e0 nh\u1eefng \u01b0u \u0111i\u1ec3m v\u00e0 l\u1ee3i \u00edch c\u1ee7a th\u00e9p kh\u00f4ng g\u1ec9 409:<\/p><ol class=\"wp-block-list\"><li>Kh\u1ea3 n\u0103ng ch\u1ecbu nhi\u1ec7t tuy\u1ec7t v\u1eddi, l\u00fd t\u01b0\u1edfng cho c\u00e1c \u1ee9ng d\u1ee5ng nhi\u1ec7t \u0111\u1ed9 cao.<\/li>\n\n<li>Kh\u1ea3 n\u0103ng ch\u1ed1ng \u0103n m\u00f2n t\u1ed1t trong h\u1ec7 th\u1ed1ng \u1ed1ng x\u1ea3 v\u00e0 \u00f4 t\u00f4.<\/li>\n\n<li>Ch\u1ed1ng oxy h\u00f3a, ho\u1ea1t \u0111\u1ed9ng t\u1ed1t trong \u0111i\u1ec1u ki\u1ec7n m\u00f4i tr\u01b0\u1eddng \u00f4n h\u00f2a.<\/li>\n\n<li>Gi\u00e1 c\u1ea3 ph\u1ea3i ch\u0103ng h\u01a1n so v\u1edbi c\u00e1c lo\u1ea1i th\u00e9p kh\u00f4ng g\u1ec9 kh\u00e1c, \u0111\u1eb7c bi\u1ec7t l\u00e0 trong c\u00e1c \u1ee9ng d\u1ee5ng l\u1edbn.<\/li>\n\n<li>D\u1ec5 ch\u1ebf t\u1ea1o v\u00e0 h\u00e0n, ph\u00f9 h\u1ee3p v\u1edbi nhi\u1ec1u m\u1ee5c \u0111\u00edch s\u1eed d\u1ee5ng trong c\u00f4ng nghi\u1ec7p.<\/li><\/ol><p>Sau \u0111\u00e2y l\u00e0 nh\u1eefng nh\u01b0\u1ee3c \u0111i\u1ec3m v\u00e0 h\u1ea1n ch\u1ebf c\u1ee7a th\u00e9p kh\u00f4ng g\u1ec9 409:<\/p><ol class=\"wp-block-list\"><li>Kh\u1ea3 n\u0103ng ch\u1ed1ng \u0103n m\u00f2n th\u1ea5p h\u01a1n c\u00e1c lo\u1ea1i th\u00e9p nh\u01b0 304 ho\u1eb7c 316.<\/li>\n\n<li>\u0110\u1ed9 b\u1ec1n gi\u1ea3m \u1edf nhi\u1ec7t \u0111\u1ed9 cao so v\u1edbi c\u00e1c lo\u1ea1i th\u00e9p kh\u00f4ng g\u1ec9 kh\u00e1c.<\/li>\n\n<li>Kh\u00f4ng ph\u00f9 h\u1ee3p v\u1edbi m\u00f4i tr\u01b0\u1eddng c\u00f3 t\u00ednh \u0103n m\u00f2n cao nh\u01b0 c\u00f4ng nghi\u1ec7p h\u00e0ng h\u1ea3i ho\u1eb7c h\u00f3a ch\u1ea5t.<\/li>\n\n<li>\u00cdt b\u1ec1n h\u01a1n trong m\u00f4i tr\u01b0\u1eddng kh\u1eafc nghi\u1ec7t, \u0111\u1eb7c bi\u1ec7t l\u00e0 khi ti\u1ebfp x\u00fac v\u1edbi mu\u1ed1i.<\/li>\n\n<li>C\u00f3 th\u1ec3 c\u1ea7n ph\u1ee7 l\u1edbp ho\u1eb7c x\u1eed l\u00fd b\u1ec1 m\u1eb7t \u0111\u1ec3 c\u1ea3i thi\u1ec7n v\u1ebb ngo\u00e0i v\u00e0 \u0111\u1ed9 b\u1ec1n.<\/li><\/ol><h2 class=\"wp-block-heading\">\u1ee8ng d\u1ee5ng ph\u1ed5 bi\u1ebfn c\u1ee7a th\u00e9p kh\u00f4ng g\u1ec9 409<\/h2><p>Ki\u1ec3m tra b\u1ea3ng d\u01b0\u1edbi \u0111\u00e2y \u0111\u1ec3 bi\u1ebft nhanh c\u00e1c \u1ee9ng d\u1ee5ng ph\u1ed5 bi\u1ebfn c\u1ee7a n\u00f3:<\/p><figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><tbody><tr><td><strong>Ng\u00e0nh c\u00f4ng nghi\u1ec7p<\/strong><\/td><td><strong>\u1ee8ng d\u1ee5ng<\/strong><\/td><td><strong>T\u1ea1i sao n\u00f3 ph\u00f9 h\u1ee3p<\/strong><\/td><\/tr><tr><td>\u00d4 t\u00f4<\/td><td>H\u1ec7 th\u1ed1ng x\u1ea3, B\u1ed9 gi\u1ea3m thanh, B\u1ed9 chuy\u1ec3n \u0111\u1ed5i x\u00fac t\u00e1c, T\u1ea5m ch\u1eafn nhi\u1ec7t<\/td><td>Kh\u1ea3 n\u0103ng ch\u1ecbu nhi\u1ec7t cao, ch\u1ed1ng \u0103n m\u00f2n, ti\u1ebft ki\u1ec7m chi ph\u00ed<\/td><\/tr><tr><td>S\u1ef1 thi c\u00f4ng<\/td><td>M\u00e1i nh\u00e0, \u1ed1p t\u01b0\u1eddng, h\u1ec7 th\u1ed1ng HVAC, \u1ed1ng th\u00f4ng gi\u00f3<\/td><td>Kh\u1ea3 n\u0103ng ch\u1ed1ng \u0103n m\u00f2n t\u1ed1t, \u0111\u1ed9 b\u1ec1n cao, d\u1ec5 ch\u1ebf t\u1ea1o<\/td><\/tr><tr><td>N\u00f4ng nghi\u1ec7p<\/td><td>Silo, m\u00e1ng \u0103n, b\u1ed3n n\u01b0\u1edbc, thi\u1ebft b\u1ecb n\u00f4ng nghi\u1ec7p<\/td><td>Kh\u1ea3 n\u0103ng ch\u1ed1ng \u0103n m\u00f2n, gi\u00e1 c\u1ea3 ph\u1ea3i ch\u0103ng, d\u1ec5 h\u00e0n<\/td><\/tr><tr><td>S\u1ea3n xu\u1ea5t \u0111i\u1ec7n<\/td><td>H\u1ec7 th\u1ed1ng x\u1ea3 tuabin kh\u00ed, H\u1ec7 th\u1ed1ng l\u00f2 h\u01a1i, B\u1ed9 trao \u0111\u1ed5i nhi\u1ec7t, \u1ed0ng d\u1eabn kh\u00ed th\u1ea3i<\/td><td>Kh\u1ea3 n\u0103ng ch\u1ecbu nhi\u1ec7t v\u00e0 ch\u1ed1ng \u0103n m\u00f2n, ph\u00f9 h\u1ee3p v\u1edbi m\u00f4i tr\u01b0\u1eddng c\u00f3 nhi\u1ec7t \u0111\u1ed9 cao<\/td><\/tr><\/tbody><\/table><\/figure><h2 class=\"wp-block-heading\">C\u00e1c c\u1ea5p \u0111\u1ed9 t\u01b0\u01a1ng \u0111\u01b0\u01a1ng c\u1ee7a th\u00e9p kh\u00f4ng g\u1ec9 409 \u1edf c\u00e1c qu\u1ed1c gia v\u00e0 khu v\u1ef1c kh\u00e1c nhau<\/h2><p>Sau \u0111\u00e2y l\u00e0 m\u1ed9t s\u1ed1 c\u1ea5p t\u01b0\u01a1ng \u0111\u01b0\u01a1ng ph\u1ed5 bi\u1ebfn c\u1ee7a SS 409 \u1edf c\u00e1c qu\u1ed1c gia v\u00e0 khu v\u1ef1c kh\u00e1c nhau:<\/p><figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><tbody><tr><td><strong>Qu\u1ed1c gia<\/strong><\/td><td><strong>Ti\u00eau chu\u1ea9n\/\u0110\u1eb7c \u0111i\u1ec3m k\u1ef9 thu\u1eadt<\/strong><\/td><td><strong>L\u1edbp t\u01b0\u01a1ng \u0111\u01b0\u01a1ng<\/strong><\/td><\/tr><tr><td>Li\u00ean minh ch\u00e2u \u00c2u<\/td><td>EN 10088-2<\/td><td>X2CrTi12 (1.4512)<\/td><\/tr><tr><td>Hoa K\u1ef3<\/td><td>Ti\u00eau chu\u1ea9n ASTM A240\/A240M<\/td><td>409 \/ S40900<\/td><\/tr><tr><td>Nh\u1eadt B\u1ea3n<\/td><td>Ti\u00eau chu\u1ea9n JIS G4304<\/td><td>SUS409L<\/td><\/tr><tr><td>Ph\u00e1p<\/td><td>S\u1ed1 35-573<\/td><td>Z3CT12<\/td><\/tr><tr><td>Anh<\/td><td>BS 1449-2<\/td><td>409S<\/td><\/tr><\/tbody><\/table><\/figure><h2 class=\"wp-block-heading\">S\u1ef1 kh\u00e1c bi\u1ec7t gi\u1eefa th\u00e9p kh\u00f4ng g\u1ec9 409, 304 v\u00e0 316<\/h2><p>Ki\u1ec3m tra b\u1ea3ng d\u01b0\u1edbi \u0111\u00e2y \u0111\u1ec3 c\u00f3 s\u1ef1 so s\u00e1nh nhanh gi\u1eefa th\u00e9p kh\u00f4ng g\u1ec9 409, 304 v\u00e0 316:<\/p><figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><tbody><tr><td><strong>T\u00e0i s\u1ea3n<\/strong><\/td><td><strong>409<\/strong><\/td><td><strong><a href=\"https:\/\/steelprogroup.com\/vi\/stainless-steel\/grades\/grade-304\/\">304<\/a><\/strong><\/td><td><strong><a href=\"https:\/\/steelprogroup.com\/vi\/stainless-steel\/grades\/grade-316\/\" target=\"_blank\" data-type=\"post\" data-id=\"10280\" rel=\"noreferrer noopener\">316<\/a><\/strong><\/td><\/tr><tr><td><strong>Ki\u1ec3u<\/strong><\/td><td>Ferritic<\/td><td>Austenit<\/td><td>Austenit<\/td><\/tr><tr><td><strong>C\u1ea5u tr\u00fac tinh th\u1ec3<\/strong><\/td><td>Kh\u1ed1i l\u1eadp ph\u01b0\u01a1ng t\u1eadp trung v\u00e0o c\u01a1 th\u1ec3 (BCC)<\/td><td>Kh\u1ed1i l\u1eadp ph\u01b0\u01a1ng t\u00e2m m\u1eb7t (FCC)<\/td><td>Kh\u1ed1i l\u1eadp ph\u01b0\u01a1ng t\u00e2m m\u1eb7t (FCC)<\/td><\/tr><tr><td><strong>Th\u00e0nh ph\u1ea7n h\u00f3a h\u1ecdc<\/strong><\/td><td>Cr: 11.13%, Ti: 0.75%<\/td><td>Cr: 18-20%, Ni: 8-10,5%<\/td><td>Cr: \uff0818%, Mo: \uff083%, Ni: \uff0814%<\/td><\/tr><tr><td><strong>Ch\u1ed1ng \u0103n m\u00f2n<\/strong><\/td><td>Trung b\u00ecnh; th\u1ea5p h\u01a1n 304 v\u00e0 316<\/td><td>Kh\u1ea3 n\u0103ng ch\u1ed1ng \u0103n m\u00f2n t\u1ed1t; s\u1eed d\u1ee5ng chung<\/td><td>Kh\u1ea3 n\u0103ng ch\u1ed1ng \u0103n m\u00f2n tuy\u1ec7t v\u1eddi, \u0111\u1eb7c bi\u1ec7t l\u00e0 trong m\u00f4i tr\u01b0\u1eddng clorua<\/td><\/tr><tr><td><strong>\u0110\u1ed9 b\u1ec1n k\u00e9o<\/strong><\/td><td>448 MPa (65 ksi)<\/td><td>505 MPa (73,2 ksi)<\/td><td>580 MPa (84,1 ksi)<\/td><\/tr><tr><td><strong>S\u1ee9c ch\u1ecbu l\u1ef1c<\/strong><\/td><td>238 MPa (34,5 ksi)<\/td><td>215 MPa (31,2 ksi)<\/td><td>290 MPa (42,1 ksi)<\/td><\/tr><tr><td><strong>\u0110\u1ed9 c\u1ee9ng Rockwell (HRB)<\/strong><\/td><td>75<\/td><td>70<\/td><td>79<\/td><\/tr><tr><td><strong>Kh\u1ea3 n\u0103ng h\u00e0n<\/strong><\/td><td>T\u1ed1t, nh\u01b0ng c\u1ea7n ph\u1ea3i l\u00e0m n\u00f3ng tr\u01b0\u1edbc<\/td><td>Tuy\u1ec7t v\u1eddi, d\u1ec5 h\u00e0n<\/td><td>Tuy\u1ec7t v\u1eddi, d\u1ec5 h\u00e0n<\/td><\/tr><tr><td><strong>Tr\u1ecb gi\u00e1<\/strong><\/td><td>Th\u1ea5p<\/td><td>V\u1eeba ph\u1ea3i<\/td><td>Cao<\/td><\/tr><tr><td><strong>\u1ee8ng d\u1ee5ng<\/strong><\/td><td>H\u1ec7 th\u1ed1ng x\u1ea3 \u00f4 t\u00f4, b\u1ed9 trao \u0111\u1ed5i nhi\u1ec7t<\/td><td>Thi\u1ebft b\u1ecb nh\u00e0 b\u1ebfp, th\u00f9ng ch\u1ee9a h\u00f3a ch\u1ea5t<\/td><td>\u1ee8ng d\u1ee5ng h\u00e0ng h\u1ea3i, ch\u1ebf bi\u1ebfn h\u00f3a ch\u1ea5t, thi\u1ebft b\u1ecb d\u01b0\u1ee3c ph\u1ea9m<\/td><\/tr><\/tbody><\/table><\/figure><p><strong>\u0110\u1ecdc th\u00eam<\/strong><br><a href=\"https:\/\/steelprogroup.com\/vi\/stainless-steel\/grades\/comparisons\/304-vs-409\/\" target=\"_blank\" data-type=\"post\" data-id=\"10411\" rel=\"noreferrer noopener\">Th\u00e9p kh\u00f4ng g\u1ec9 304 so v\u1edbi 409<\/a><\/p><h2 class=\"wp-block-heading\">Nh\u1eefng g\u00ec b\u1ea1n c\u0169ng c\u00f3 th\u1ec3 quan t\u00e2m<\/h2><h3 class=\"wp-block-heading\">Th\u00e9p kh\u00f4ng g\u1ec9 409 c\u00f3 h\u00e0n \u0111\u01b0\u1ee3c kh\u00f4ng?<\/h3><p>C\u00f3, th\u00e9p kh\u00f4ng g\u1ec9 409 c\u00f3 th\u1ec3 h\u00e0n \u0111\u01b0\u1ee3c. N\u00f3 th\u01b0\u1eddng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong c\u00e1c \u1ee9ng d\u1ee5ng nh\u01b0 h\u1ec7 th\u1ed1ng x\u1ea3 n\u01a1i c\u1ea7n ph\u1ea3i h\u00e0n.<\/p><h3 class=\"wp-block-heading\">Th\u00e9p kh\u00f4ng g\u1ec9 409 c\u00f3 t\u1eeb t\u00ednh kh\u00f4ng?<\/h3><p>C\u00f3, th\u00e9p kh\u00f4ng g\u1ec9 409 c\u00f3 t\u1eeb t\u00ednh. \u0110\u00e2y l\u00e0 th\u00e9p kh\u00f4ng g\u1ec9 ferritic, th\u01b0\u1eddng gi\u1eef nguy\u00ean t\u00ednh ch\u1ea5t t\u1eeb t\u00ednh.<\/p><p><strong>\u0110\u1ecdc li\u00ean quan<\/strong><\/p><p><a href=\"https:\/\/steelprogroup.com\/vi\/stainless-steel\/properties\/magnetic\/\">Th\u00e9p kh\u00f4ng g\u1ec9 c\u00f3 t\u1eeb t\u00ednh kh\u00f4ng?<\/a><\/p><h3 class=\"wp-block-heading\">L\u00e0m th\u1ebf n\u00e0o \u0111\u1ec3 gi\u1eef cho th\u00e9p kh\u00f4ng g\u1ec9 409 kh\u00f4ng b\u1ecb r\u1ec9 s\u00e9t?<\/h3><p>\u0110\u1ec3 gi\u1eef cho th\u00e9p kh\u00f4ng g\u1ec9 409 kh\u00f4ng b\u1ecb r\u1ec9 s\u00e9t, h\u00e3y gi\u1eef cho th\u00e9p s\u1ea1ch v\u00e0 kh\u00f4. \u00c1p d\u1ee5ng l\u1edbp ph\u1ee7 b\u1ea3o v\u1ec7 v\u00e0 tr\u00e1nh ti\u1ebfp x\u00fac v\u1edbi h\u00f3a ch\u1ea5t \u0111\u1ed9c h\u1ea1i ho\u1eb7c n\u01b0\u1edbc mu\u1ed1i. B\u1ea3o d\u01b0\u1ee1ng th\u01b0\u1eddng xuy\u00ean, ch\u1eb3ng h\u1ea1n nh\u01b0 lo\u1ea1i b\u1ecf ch\u1ea5t g\u00e2y \u00f4 nhi\u1ec5m b\u1ec1 m\u1eb7t, gi\u00fap ng\u0103n ng\u1eeba \u0103n m\u00f2n.<\/p><p><strong>\u0110\u1ecdc li\u00ean quan<\/strong><\/p><p><a href=\"https:\/\/steelprogroup.com\/vi\/stainless-steel\/rust\/\">Th\u00e9p kh\u00f4ng g\u1ec9 c\u00f3 b\u1ecb g\u1ec9 kh\u00f4ng v\u00e0 b\u1ea1n c\u00f3 th\u1ec3 gi\u1ea3i quy\u1ebft b\u1eb1ng c\u00e1ch n\u00e0o?<\/a><\/p><h3 class=\"wp-block-heading\">Th\u00e9p kh\u00f4ng g\u1ec9 409 c\u00f3 ph\u1ea3i l\u00e0 lo\u1ea1i th\u00e9p kh\u00f4ng g\u1ec9 d\u00f9ng trong th\u1ef1c ph\u1ea9m kh\u00f4ng?<\/h3><p>Kh\u00f4ng, th\u00e9p kh\u00f4ng g\u1ec9 409 kh\u00f4ng \u0111\u01b0\u1ee3c coi l\u00e0 lo\u1ea1i d\u00f9ng cho th\u1ef1c ph\u1ea9m. N\u00f3 ch\u1ee7 y\u1ebfu \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng cho c\u00e1c \u1ee9ng d\u1ee5ng \u00f4 t\u00f4 v\u00e0 c\u00f4ng nghi\u1ec7p. \u0110\u1ed1i v\u1edbi c\u00e1c \u1ee9ng d\u1ee5ng d\u00f9ng cho th\u1ef1c ph\u1ea9m, th\u00e9p kh\u00f4ng g\u1ec9 304 ho\u1eb7c 316 \u0111\u01b0\u1ee3c \u01b0a chu\u1ed9ng v\u00ec kh\u1ea3 n\u0103ng ch\u1ed1ng \u0103n m\u00f2n v\u01b0\u1ee3t tr\u1ed9i v\u00e0 tu\u00e2n th\u1ee7 c\u00e1c ti\u00eau chu\u1ea9n an to\u00e0n th\u1ef1c ph\u1ea9m.<\/p><h2 class=\"wp-block-heading\">T\u00f3m t\u1eaft &amp; Th\u00eam n\u1eefa<\/h2><p>B\u00e0i vi\u1ebft n\u00e0y gi\u1ea3i th\u00edch ng\u1eafn g\u1ecdn v\u1ec1 \u0111\u1ecbnh ngh\u0129a, th\u00e0nh ph\u1ea7n, t\u00ednh ch\u1ea5t, \u0111\u1eb7c \u0111i\u1ec3m ch\u1ebf bi\u1ebfn, \u1ee9ng d\u1ee5ng v\u00e0 c\u00e1c kh\u00eda c\u1ea1nh quan tr\u1ecdng kh\u00e1c c\u1ee7a th\u00e9p kh\u00f4ng g\u1ec9 409. \u0110\u1ec3 t\u00ecm hi\u1ec3u th\u00eam v\u1ec1 th\u00e9p kh\u00f4ng g\u1ec9 ho\u1eb7c c\u00e1c lo\u1ea1i th\u00e9p kh\u00e1c, h\u00e3y xem <a href=\"https:\/\/steelprogroup.com\/vi\/blog\/\">blog c\u1ee7a ch\u00fang t\u00f4i<\/a> ho\u1eb7c <a href=\"https:\/\/steelprogroup.com\/vi\/contact-us\/\">li\u00ean h\u1ec7 v\u1edbi c\u00e1c chuy\u00ean gia kim lo\u1ea1i c\u1ee7a ch\u00fang t\u00f4i<\/a>.<\/p><p>L\u00e0 nh\u00e0 s\u1ea3n xu\u1ea5t v\u00e0 cung c\u1ea5p gi\u1ea3i ph\u00e1p h\u00e0ng \u0111\u1ea7u v\u1ec1 th\u00e9p chuy\u00ean d\u1ee5ng, ch\u00fang t\u00f4i cung c\u1ea5p c\u00e1c gi\u1ea3i ph\u00e1p \u1ee9ng d\u1ee5ng \u0111a ng\u00e0nh v\u00e0 d\u1ecbch v\u1ee5 t\u00f9y ch\u1ec9nh v\u1edbi cam k\u1ebft ch\u1ea5t l\u01b0\u1ee3ng 100%, cam k\u1ebft ph\u00e1t tri\u1ec3n c\u00f9ng kh\u00e1ch h\u00e0ng. Gh\u00e9 th\u0103m <a href=\"https:\/\/steelprogroup.com\/vi\">trang web c\u1ee7a ch\u00fang t\u00f4i<\/a> \u0111\u1ec3 t\u00ecm hi\u1ec3u th\u00eam, ho\u1eb7c <a href=\"https:\/\/steelprogroup.com\/vi\/contact-us\/\">g\u1eedi cho ch\u00fang t\u00f4i m\u1ed9t b\u00e1o gi\u00e1<\/a>v\u00e0 ch\u00fang t\u00f4i s\u1ebd li\u00ean h\u1ec7 v\u1edbi b\u1ea1n s\u1edbm!<\/p>","protected":false},"excerpt":{"rendered":"<p>Th\u00e9p kh\u00f4ng g\u1ec9 409 l\u00e0 g\u00ec? 409, c\u00f2n \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 UNS S40900, l\u00e0 th\u00e9p kh\u00f4ng g\u1ec9 ferritic d\u00f2ng 400 ch\u1ee7 y\u1ebfu bao g\u1ed3m [\u2026]<\/p>","protected":false},"author":1,"featured_media":10287,"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 center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[4191,112],"tags":[],"class_list":["post-10290","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-grades","category-stainless-steel"],"acf":[],"_links":{"self":[{"href":"https:\/\/steelprogroup.com\/vi\/wp-json\/wp\/v2\/posts\/10290","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/steelprogroup.com\/vi\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/steelprogroup.com\/vi\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/steelprogroup.com\/vi\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/steelprogroup.com\/vi\/wp-json\/wp\/v2\/comments?post=10290"}],"version-history":[{"count":0,"href":"https:\/\/steelprogroup.com\/vi\/wp-json\/wp\/v2\/posts\/10290\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/steelprogroup.com\/vi\/wp-json\/wp\/v2\/media\/10287"}],"wp:attachment":[{"href":"https:\/\/steelprogroup.com\/vi\/wp-json\/wp\/v2\/media?parent=10290"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/steelprogroup.com\/vi\/wp-json\/wp\/v2\/categories?post=10290"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/steelprogroup.com\/vi\/wp-json\/wp\/v2\/tags?post=10290"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}