{"id":10955,"date":"2024-10-04T08:29:00","date_gmt":"2024-10-04T00:29:00","guid":{"rendered":"https:\/\/app11147.cloudwayssites.com\/?p=10955"},"modified":"2024-11-21T10:25:37","modified_gmt":"2024-11-21T02:25:37","slug":"grade-444","status":"publish","type":"post","link":"https:\/\/steelprogroup.com\/vi\/stainless-steel\/grades\/grade-444\/","title":{"rendered":"Th\u00e9p kh\u00f4ng g\u1ec9 444: H\u00ecnh th\u1ee9c, th\u00e0nh ph\u1ea7n, t\u00ednh ch\u1ea5t, \u1ee9ng d\u1ee5ng, so s\u00e1nh v\u00e0 nhi\u1ec1u h\u01a1n n\u1eefa"},"content":{"rendered":"<p>Th\u00e9p kh\u00f4ng g\u1ec9 444 l\u00e0 th\u00e9p kh\u00f4ng g\u1ec9 ferritic \u0111\u01b0\u1ee3c bi\u1ebft \u0111\u1ebfn v\u1edbi kh\u1ea3 n\u0103ng ch\u1ed1ng \u0103n m\u00f2n tuy\u1ec7t v\u1eddi. Ch\u00fang t\u00f4i gi\u1edbi thi\u1ec7u chi ti\u1ebft v\u1ec1 th\u00e9p kh\u00f4ng g\u1ec9 444, bao g\u1ed3m c\u00e1c d\u1ea1ng s\u1ea3n ph\u1ea9m, th\u00e0nh ph\u1ea7n h\u00f3a h\u1ecdc, t\u00ednh ch\u1ea5t, \u1ee9ng d\u1ee5ng, \u01b0u \u0111i\u1ec3m v\u00e0 nh\u01b0\u1ee3c \u0111i\u1ec3m, v\u00e0 so s\u00e1nh 444 v\u1edbi 304, 316, 316L.<\/p><h2 class=\"wp-block-heading\">Th\u00e9p kh\u00f4ng g\u1ec9 444 l\u00e0 g\u00ec?<\/h2><p>444 l\u00e0 th\u00e9p kh\u00f4ng g\u1ec9 ferritic \u00edt cacbon, \u00edt nit\u01a1, bao g\u1ed3m 18% Cr v\u00e0 2% Mo, th\u01b0\u1eddng c\u00f3 \u1edf d\u1ea1ng t\u1ea5m ho\u1eb7c cu\u1ed9n d\u00e0y 2mm. N\u00f3 c\u00f3 kh\u1ea3 n\u0103ng ch\u1ed1ng r\u1ed7 v\u00e0 \u0103n m\u00f2n khe h\u1edf \u0111\u00e1ng k\u1ec3, khi\u1ebfn n\u00f3 tr\u1edf th\u00e0nh s\u1ef1 thay th\u1ebf kinh t\u1ebf cho 304 v\u00e0 316. Vi\u1ec7c b\u1ed5 sung titan ho\u1eb7c niobi gi\u00fap \u1ed5n \u0111\u1ecbnh 444 v\u00e0 gi\u00fap ng\u0103n ng\u1eeba nh\u1ea1y c\u1ea3m v\u00e0 \u0103n m\u00f2n gi\u1eefa c\u00e1c h\u1ea1t, \u0111\u1eb7c bi\u1ec7t l\u00e0 trong qu\u00e1 tr\u00ecnh h\u00e0n.<\/p><h3 class=\"wp-block-heading\">C\u1ea5p \u0111\u1ed9 t\u01b0\u01a1ng \u0111\u01b0\u01a1ng c\u1ee7a th\u00e9p kh\u00f4ng g\u1ec9 444<\/h3><p>D\u01b0\u1edbi \u0111\u00e2y l\u00e0 m\u1ed9t s\u1ed1 c\u1ea5p \u0111\u1ed9 t\u01b0\u01a1ng \u0111\u01b0\u01a1ng:<\/p><ul class=\"wp-block-list\"><li>UNS: S44400<\/li>\n\n<li>Ti\u1ebfng Vi\u1ec7t: X2CrMoTi18-2 (1.4521)<\/li>\n\n<li>Ti\u00eau chu\u1ea9n: SUS 444<\/li>\n\n<li>Ti\u00eau chu\u1ea9n: 00Cr18Mo2<\/li><\/ul><h3 class=\"wp-block-heading\">Ti\u00eau chu\u1ea9n th\u00e9p kh\u00f4ng g\u1ec9 444<\/h3><p>Ti\u00eau chu\u1ea9n ASTM A240, Ti\u00eau chu\u1ea9n ASTM A268, Ti\u00eau chu\u1ea9n ASTM A479<\/p><h2 class=\"wp-block-heading\">Th\u00e0nh ph\u1ea7n h\u00f3a h\u1ecdc c\u1ee7a th\u00e9p kh\u00f4ng g\u1ec9 444<\/h2><figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><tbody><tr><td>Y\u1ebfu t\u1ed1<\/td><td>Ph\u1ea1m vi th\u00e0nh ph\u1ea7n<\/td><\/tr><tr><td>Cacbon (C)<\/td><td>\u2264 0,025%<\/td><\/tr><tr><td>Mangan (Mn)<\/td><td>\u2264 1,00%<\/td><\/tr><tr><td>Silic (Si)<\/td><td>\u2264 1,00%<\/td><\/tr><tr><td>Crom (Cr)<\/td><td>17.5% &#8211; 19.5%<\/td><\/tr><tr><td>Niken (Ni)<\/td><td>\u2264 0,50%<\/td><\/tr><tr><td>Molip\u0111en (Mo)<\/td><td>1.75% &#8211; 2.50%<\/td><\/tr><tr><td>Nit\u01a1 (N)<\/td><td>\u2264 0,030%<\/td><\/tr><tr><td>L\u01b0u hu\u1ef3nh (S)<\/td><td>\u2264 0,030%<\/td><\/tr><tr><td>Ph\u1ed1t pho (P)<\/td><td>\u2264 0,040%<\/td><\/tr><tr><td>Titan (Ti) <\/td><td>0.20% &#8211; 0.80%<\/td><\/tr><\/tbody><\/table><\/figure><h2 class=\"wp-block-heading\">T\u00ednh ch\u1ea5t c\u1ee7a th\u00e9p kh\u00f4ng g\u1ec9 444<\/h2><h3 class=\"wp-block-heading\">C\u00e1c t\u00ednh n\u0103ng ch\u00ednh<\/h3><ul class=\"wp-block-list\"><li><strong>Kh\u1ea3 n\u0103ng ch\u1ed1ng \u0103n m\u00f2n:<\/strong> Th\u00e9p kh\u00f4ng g\u1ec9 444 c\u00f3 kh\u1ea3 n\u0103ng ch\u1ed1ng r\u1ed7 do clorua v\u00e0 \u0103n m\u00f2n khe h\u1edf cao. N\u00f3 v\u01b0\u1ee3t tr\u1ed9i h\u01a1n h\u1ea7u h\u1ebft c\u00e1c lo\u1ea1i th\u00e9p kh\u00f4ng g\u1ec9 ferritic v\u00e0 t\u01b0\u01a1ng \u0111\u01b0\u01a1ng v\u1edbi 316L trong nhi\u1ec1u m\u00f4i tr\u01b0\u1eddng.<\/li><\/ul><ul class=\"wp-block-list\"><li><strong>T\u00ednh ch\u1ea5t nhi\u1ec7t:<\/strong> V\u1edbi \u0111\u1ed9 d\u1eabn nhi\u1ec7t cao h\u01a1n c\u00e1c lo\u1ea1i th\u00e9p kh\u00f4ng g\u1ec9 austenit nh\u01b0 304 v\u00e0 316, th\u00e9p kh\u00f4ng g\u1ec9 444 r\u1ea5t l\u00fd t\u01b0\u1edfng cho c\u00e1c \u1ee9ng d\u1ee5ng li\u00ean quan \u0111\u1ebfn trao \u0111\u1ed5i nhi\u1ec7t. H\u1ec7 s\u1ed1 gi\u00e3n n\u1edf nhi\u1ec7t t\u01b0\u01a1ng \u0111\u1ed1i th\u1ea5p c\u1ee7a n\u00f3 gi\u00fap gi\u1ea3m thi\u1ec3u s\u1ef1 bi\u1ebfn d\u1ea1ng x\u1ea3y ra trong c\u00e1c chu k\u1ef3 nhi\u1ec7t.<\/li><\/ul><ul class=\"wp-block-list\"><li><strong>Kh\u1ea3 n\u0103ng t\u1ea1o h\u00ecnh: <\/strong>V\u1eadt li\u1ec7u n\u00e0y c\u00f3 kh\u1ea3 n\u0103ng \u0111\u1ecbnh h\u00ecnh cao v\u00e0 tuy\u1ec7t v\u1eddi trong c\u00e1c \u1ee9ng d\u1ee5ng k\u00e9o s\u00e2u, m\u1eb7c d\u00f9 c\u00f3 h\u1ea1n ch\u1ebf trong vi\u1ec7c t\u1ea1o h\u00ecnh k\u00e9o gi\u00e3n.<\/li><\/ul><ul class=\"wp-block-list\"><li><strong>Kh\u1ea3 n\u0103ng h\u00e0n: <\/strong>Nh\u1edd c\u00f3 ch\u1ea5t \u1ed5n \u0111\u1ecbnh titan ho\u1eb7c niobi, th\u00e9p kh\u00f4ng g\u1ec9 444 c\u00f3 th\u1ec3 h\u00e0n m\u00e0 kh\u00f4ng b\u1ecb nh\u1ea1y c\u1ea3m, nh\u01b0ng ph\u1ea3i c\u1ea9n th\u1eadn \u0111\u1ec3 tr\u00e1nh nhi\u1ec7t \u0111\u1ed9 qu\u00e1 cao c\u00f3 th\u1ec3 d\u1eabn \u0111\u1ebfn s\u1ef1 ph\u00e1t tri\u1ec3n c\u1ee7a h\u1ea1t.<\/li><\/ul><h3 class=\"wp-block-heading\">T\u00ednh ch\u1ea5t v\u1eadt l\u00fd<\/h3><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 s\u1ed1 li\u1ec7u<\/strong><\/td><td><strong>Gi\u00e1 tr\u1ecb \u0110\u1ebf qu\u1ed1c<\/strong><\/td><\/tr><tr><td>T\u1ec9 tr\u1ecdng<\/td><td>7,75 g\/cm\u00b3<\/td><td>0,280 lb\/in\u00b3<\/td><\/tr><tr><td>\u0110i\u1ec7n tr\u1edf su\u1ea5t<\/td><td>0,80 \u03bc\u03a9\u00b7m<\/td><td>22,50 \u03bc\u03a9\u00b7trong<\/td><\/tr><tr><td>\u0110\u1ed9 d\u1eabn nhi\u1ec7t (\u1edf 100\u00b0C)<\/td><td>26,8 W\/m\u00b7K<\/td><td>15,5 BTU\/gi\u1edd\u00b7ft\u00b2\u00b7\u00b0F<\/td><\/tr><tr><td>Nhi\u1ec7t dung ri\u00eang<\/td><td>0,427 kJ\/kg\u00b7K<\/td><td>0,102 BTU\/lb\u00b7\u00b0F<\/td><\/tr><tr><td>H\u1ec7 s\u1ed1 gi\u00e3n n\u1edf nhi\u1ec7t trung b\u00ecnh (0-100\u00b0C)<\/td><td>11,0 x 10\u207b\u2076 \/\u00b0C<\/td><td>6,1 x 10\u207b\u2076 \/\u00b0F<\/td><\/tr><tr><td>M\u00f4 \u0111un \u0111\u00e0n h\u1ed3i (L\u1ef1c c\u0103ng)<\/td><td>200 GPa<\/td><td>29.000 kil\u00f4gam<\/td><\/tr><tr><td>\u0110\u1ed9 t\u1eeb th\u1ea9m<\/td><td>T\u1eeb t\u00ednh<\/td><td>T\u1eeb t\u00ednh<\/td><\/tr><tr><td>Ph\u1ea1m vi n\u00f3ng ch\u1ea3y<\/td><td>1482-1532 \u00b0C<\/td><td>2700-2790 \u00b0F<\/td><\/tr><\/tbody><\/table><\/figure><h3 class=\"wp-block-heading\">T\u00ednh ch\u1ea5t c\u01a1 h\u1ecdc<\/h3><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 \u1ee7<\/strong><\/td><td><strong>Gi\u00e1 tr\u1ecb l\u00e0m vi\u1ec7c l\u1ea1nh<\/strong><\/td><td><strong>Gi\u00e1 tr\u1ecb \u0111\u01b0\u1ee3c t\u00f4i luy\u1ec7n<\/strong><\/td><\/tr><tr><td>\u0110\u1ed9 b\u1ec1n k\u00e9o t\u1ed1i \u0111a<\/td><td>415-640MPa<\/td><td>600-700MPa<\/td><td>60 KSI ph\u00fat (414 MPa ph\u00fat)<\/td><\/tr><tr><td>Gi\u1edbi h\u1ea1n ch\u1ea3y (\u0110\u1ed9 l\u1ec7ch 0,2%)<\/td><td>275-320MPa<\/td><td>450-500MPa<\/td><td>40 KSI ph\u00fat (276 MPa ph\u00fat)<\/td><\/tr><tr><td>\u0110\u1ed9 gi\u00e3n d\u00e0i (% trong 50mm)<\/td><td>20% ph\u00fat<\/td><td>15% ph\u00fat<\/td><td>20-22% ph\u00fat<\/td><\/tr><tr><td>\u0110\u1ed9 c\u1ee9ng (Rockwell B)<\/td><td>90 t\u1ed1i \u0111a<\/td><td>95-100<\/td><td>Rb 90 t\u1ed1i \u0111a<\/td><\/tr><tr><td>\u0110\u1ed9 c\u1ee9ng Brinell<\/td><td>217 t\u1ed1i \u0111a<\/td><td>230-250<\/td><td>200-220<\/td><\/tr><tr><td>M\u00f4 \u0111un \u0111\u00e0n h\u1ed3i (c\u1eaft)<\/td><td>80-83 GPa<\/td><td>80-83 GPa<\/td><td>80-83 GPa<\/td><\/tr><tr><td>T\u1ef7 s\u1ed1 Poisson<\/td><td>0.27-0.30<\/td><td>0.27-0.30<\/td><td>0.27-0.30<\/td><\/tr><\/tbody><\/table><\/figure><h2 class=\"wp-block-heading\">H\u00ecnh d\u1ea1ng th\u00e9p kh\u00f4ng g\u1ec9 444<\/h2><p>Ch\u00fang t\u00f4i s\u1ea3n xu\u1ea5t v\u00e0 cung c\u1ea5p th\u00e9p kh\u00f4ng g\u1ec9 444 \u1edf nhi\u1ec1u d\u1ea1ng kh\u00e1c nhau \u0111\u1ec3 \u0111\u00e1p \u1ee9ng nhu c\u1ea7u kh\u00e1c nhau c\u1ee7a kh\u00e1ch h\u00e0ng. C\u00e1c d\u1ea1ng n\u00e0y bao g\u1ed3m:<\/p><ul class=\"wp-block-list\"><li><strong>Cu\u1ed9n d\u00e2y: <\/strong>\u0110\u01b0\u1ee3c s\u1eed d\u1ee5ng trong nhi\u1ec1u \u1ee9ng d\u1ee5ng c\u00f4ng nghi\u1ec7p, \u0111\u1eb7c bi\u1ec7t l\u00e0 khi c\u1ea7n v\u1eadt li\u1ec7u m\u1ec1m d\u1ebbo.<\/li><\/ul><ul class=\"wp-block-list\"><li><strong>T\u1ea5m v\u00e0 T\u1ea5m:<\/strong> Th\u00edch h\u1ee3p cho vi\u1ec7c ch\u1ebf t\u1ea1o b\u1ed3n ch\u1ee9a, t\u1ea5m \u1ed1p v\u00e0 c\u00e1c b\u1ed9 ph\u1eadn \u00f4 t\u00f4.<\/li><\/ul><ul class=\"wp-block-list\"><li><strong>D\u00e2y \u0111i\u1ec7n:<\/strong> C\u00f3 s\u1eb5n \u1edf d\u1ea1ng m\u1ecbn, tr\u00f2n v\u00e0 ph\u1eb3ng, th\u01b0\u1eddng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong h\u1ec7 th\u1ed1ng ch\u1ebf bi\u1ebfn th\u1ef1c ph\u1ea9m v\u00e0 l\u1ecdc.<\/li><\/ul><ul class=\"wp-block-list\"><li><strong>\u1ed0ng v\u00e0 \u1ed0ng d\u1eabn:<\/strong> \u0110\u01b0\u1ee3c \u1ee9ng d\u1ee5ng r\u1ed9ng r\u00e3i trong b\u1ed9 trao \u0111\u1ed5i nhi\u1ec7t, h\u1ec7 th\u1ed1ng \u0111\u01b0\u1eddng \u1ed1ng v\u00e0 b\u1ec3 ch\u1ee9a n\u01b0\u1edbc.<\/li><\/ul><ul class=\"wp-block-list\"><li><strong>Thanh v\u00e0 que:<\/strong> Th\u00edch h\u1ee3p cho c\u00e1c chi ti\u1ebft \u1ed1c v\u00edt, th\u00e0nh ph\u1ea7n k\u1ebft c\u1ea5u v\u00e0 b\u1ed9 ph\u1eadn m\u00e1y m\u00f3c.<\/li><\/ul><h2 class=\"wp-block-heading\">\u1ee8ng d\u1ee5ng c\u1ee7a th\u00e9p kh\u00f4ng g\u1ec9 444<\/h2><p>T\u00ednh linh ho\u1ea1t c\u1ee7a th\u00e9p kh\u00f4ng g\u1ec9 444 cho ph\u00e9p n\u00f3 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong nhi\u1ec1u \u1ee9ng d\u1ee5ng kh\u00e1c nhau:<\/p><p><strong>B\u1ed9 trao \u0111\u1ed5i nhi\u1ec7t:<\/strong> V\u1edbi kh\u1ea3 n\u0103ng d\u1eabn nhi\u1ec7t tuy\u1ec7t v\u1eddi v\u00e0 kh\u1ea3 n\u0103ng ch\u1ed1ng \u0103n m\u00f2n do nhi\u1ec7t, th\u00e9p kh\u00f4ng g\u1ec9 444 l\u00fd t\u01b0\u1edfng \u0111\u1ec3 s\u1eed d\u1ee5ng trong b\u1ed9 trao \u0111\u1ed5i nhi\u1ec7t, \u0111\u1eb7c bi\u1ec7t l\u00e0 trong m\u00f4i tr\u01b0\u1eddng gi\u00e0u clorua.<\/p><p><strong>B\u00ecnh n\u01b0\u1edbc n\u00f3ng:<\/strong> 444 l\u00e0 v\u1eadt li\u1ec7u l\u00fd t\u01b0\u1edfng cho b\u00ecnh n\u01b0\u1edbc n\u00f3ng v\u00e0 b\u00ecnh n\u01b0\u1edbc n\u00f3ng tr\u1ef1c ti\u1ebfp v\u00ec n\u00f3 ch\u1ed1ng \u0103n m\u00f2n trong m\u00f4i tr\u01b0\u1eddng gi\u00e0u n\u01b0\u1edbc, \u0111\u1eb7c bi\u1ec7t l\u00e0 khi ti\u1ebfp x\u00fac v\u1edbi nhi\u1ec7t \u0111\u1ed9 cao v\u00e0 ion clorua.<\/p><p><strong>Thi\u1ebft b\u1ecb ch\u1ebf bi\u1ebfn th\u1ef1c ph\u1ea9m: <\/strong>Trong ng\u00e0nh c\u00f4ng nghi\u1ec7p th\u1ef1c ph\u1ea9m, n\u01a1i v\u1ec7 sinh v\u00e0 kh\u1ea3 n\u0103ng ch\u1ed1ng \u0103n m\u00f2n r\u1ea5t quan tr\u1ecdng, th\u00e9p kh\u00f4ng g\u1ec9 444 ng\u0103n ng\u1eeba \u00f4 nhi\u1ec5m v\u00e0 c\u00f3 th\u1ec3 ch\u1ecbu \u0111\u01b0\u1ee3c h\u00f3a ch\u1ea5t t\u1ea9y r\u1eeda.<\/p><p><strong>Ng\u00e0nh c\u00f4ng nghi\u1ec7p \u00f4 t\u00f4: <\/strong>\u0110\u1ed9 b\u1ec1n cao v\u00e0 kh\u1ea3 n\u0103ng ch\u1ed1ng kh\u00ed th\u1ea3i c\u1ee7a h\u1ee3p kim n\u00e0y khi\u1ebfn n\u00f3 tr\u1edf th\u00e0nh l\u1ef1a ch\u1ecdn ph\u1ed5 bi\u1ebfn \u0111\u1ec3 s\u1ea3n xu\u1ea5t c\u00e1c b\u1ed9 ph\u1eadn \u00f4 t\u00f4, \u0111\u1eb7c bi\u1ec7t l\u00e0 h\u1ec7 th\u1ed1ng \u1ed1ng x\u1ea3.<\/p><p><strong>T\u1ea5m pin m\u1eb7t tr\u1eddi v\u00e0 m\u00e1y n\u01b0\u1edbc n\u00f3ng:<\/strong> Th\u00e9p kh\u00f4ng g\u1ec9 444 th\u01b0\u1eddng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong m\u00e1y n\u01b0\u1edbc n\u00f3ng n\u0103ng l\u01b0\u1ee3ng m\u1eb7t tr\u1eddi do kh\u1ea3 n\u0103ng ch\u1ed1ng \u0111\u00f3ng c\u1eb7n v\u00e0 hi\u1ec7u qu\u1ea3 h\u1ea5p th\u1ee5 nhi\u1ec7t cao.<\/p><h2 class=\"wp-block-heading\">\u01afu v\u00e0 nh\u01b0\u1ee3c \u0111i\u1ec3m c\u1ee7a th\u00e9p kh\u00f4ng g\u1ec9 444<\/h2><h3 class=\"wp-block-heading\">Thu\u1eadn l\u1ee3i<\/h3><ol class=\"wp-block-list\"><li>Kh\u1ea3 n\u0103ng ch\u1ed1ng \u0103n m\u00f2n: Th\u00e9p kh\u00f4ng g\u1ec9 444 ho\u1ea1t \u0111\u1ed9ng t\u1ed1t trong m\u00f4i tr\u01b0\u1eddng c\u00f3 t\u00ednh \u0103n m\u00f2n cao, \u0111\u1eb7c bi\u1ec7t l\u00e0 m\u00f4i tr\u01b0\u1eddng c\u00f3 ion clorua.<\/li>\n\n<li>Ti\u1ebft ki\u1ec7m chi ph\u00ed: Do kh\u00f4ng ch\u1ee9a niken n\u00ean \u0111\u00e2y l\u00e0 l\u1ef1a ch\u1ecdn c\u00f3 gi\u00e1 c\u1ea3 ph\u1ea3i ch\u0103ng h\u01a1n so v\u1edbi c\u00e1c lo\u1ea1i th\u00e9p austenit nh\u01b0 316 v\u00e0 316L.<\/li>\n\n<li>Kh\u1ea3 n\u0103ng h\u00e0n: H\u1ee3p kim c\u00f3 \u0111\u1ed9 \u1ed5n \u0111\u1ecbnh sau khi h\u00e0n do \u0111\u01b0\u1ee3c b\u1ed5 sung th\u00eam ch\u1ea5t \u1ed5n \u0111\u1ecbnh nh\u01b0 titan v\u00e0 niobi.<\/li>\n\n<li>T\u1eeb t\u00ednh: T\u00ednh ch\u1ea5t s\u1eaft t\u1eeb c\u1ee7a n\u00f3 c\u00f3 l\u1ee3i trong m\u1ed9t s\u1ed1 \u1ee9ng d\u1ee5ng c\u00f4ng nghi\u1ec7p.<\/li>\n\n<li>Hi\u1ec7u su\u1ea5t nhi\u1ec7t: \u0110\u1ed9 d\u1eabn nhi\u1ec7t tuy\u1ec7t v\u1eddi gi\u00fap t\u0103ng hi\u1ec7u qu\u1ea3 trong c\u00e1c h\u1ec7 th\u1ed1ng trao \u0111\u1ed5i nhi\u1ec7t.<\/li><\/ol><h3 class=\"wp-block-heading\">Nh\u01b0\u1ee3c \u0111i\u1ec3m<\/h3><ol class=\"wp-block-list\"><li>\u0110\u1ed9 d\u1ebbo th\u1ea5p h\u01a1n: Th\u00e9p kh\u00f4ng g\u1ec9 444 k\u00e9m d\u1ebbo h\u01a1n c\u00e1c lo\u1ea1i th\u00e9p austenit nh\u01b0 304 v\u00e0 316, \u0111i\u1ec1u n\u00e0y h\u1ea1n ch\u1ebf vi\u1ec7c s\u1eed d\u1ee5ng th\u00e9p n\u00e0y trong m\u1ed9t s\u1ed1 quy tr\u00ecnh ch\u1ebf t\u1ea1o.<\/li>\n\n<li>\u0110\u1ed9 b\u1ec1n m\u1ed1i h\u00e0n h\u1ea1n ch\u1ebf: C\u00e1c m\u1ed1i h\u00e0n \u1edf c\u00e1c ph\u1ea7n d\u00e0y h\u01a1n c\u00f3 th\u1ec3 c\u00f3 \u0111\u1ed9 b\u1ec1n v\u00e0 \u0111\u1ed9 d\u1ebbo dai gi\u1ea3m, khi\u1ebfn ch\u00fang \u00edt ph\u00f9 h\u1ee3p cho c\u00e1c \u1ee9ng d\u1ee5ng ch\u1ecbu \u1ee9ng su\u1ea5t cao.<\/li>\n\n<li>S\u1ef1 ph\u00e1t tri\u1ec3n c\u1ee7a h\u1ea1t: C\u1ea7n ph\u1ea3i c\u1ea9n th\u1eadn trong qu\u00e1 tr\u00ecnh x\u1eed l\u00fd nhi\u1ec7t \u0111\u1ec3 tr\u00e1nh s\u1ef1 ph\u00e1t tri\u1ec3n c\u1ee7a h\u1ea1t, \u0111i\u1ec1u n\u00e0y c\u00f3 th\u1ec3 \u1ea3nh h\u01b0\u1edfng x\u1ea5u \u0111\u1ebfn c\u00e1c t\u00ednh ch\u1ea5t c\u01a1 h\u1ecdc.<\/li><\/ol><h2 class=\"wp-block-heading\">Ph\u01b0\u01a1ng ph\u00e1p ch\u1ebf bi\u1ebfn th\u00e9p kh\u00f4ng g\u1ec9 444 l\u00e0 g\u00ec?<\/h2><h3 class=\"wp-block-heading\"><strong>H\u00ecnh th\u00e0nh<\/strong><\/h3><ul class=\"wp-block-list\"><li><strong>T\u1ea1o h\u00ecnh l\u1ea1nh<\/strong>: Th\u00e9p kh\u00f4ng g\u1ec9 444 c\u00f3 kh\u1ea3 n\u0103ng \u0111\u1ecbnh h\u00ecnh t\u1ed1t v\u00e0 th\u01b0\u1eddng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong c\u00e1c quy tr\u00ecnh \u0111\u1ecbnh h\u00ecnh nh\u01b0 u\u1ed1n v\u00e0 k\u00e9o. N\u00f3 c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c \u0111\u1ecbnh h\u00ecnh ngu\u1ed9i th\u00e0nh nhi\u1ec1u h\u00ecnh d\u1ea1ng kh\u00e1c nhau nh\u01b0ng c\u00f3 th\u1ec3 c\u1ea7n \u1ee7 trung gian n\u1ebfu c\u1ea7n \u0111\u1ecbnh h\u00ecnh r\u1ed9ng r\u00e3i \u0111\u1ec3 tr\u00e1nh n\u1ee9t.<\/li>\n\n<li><strong>V\u1ebd s\u00e2u<\/strong>: Th\u00edch h\u1ee3p cho c\u00e1c \u1ee9ng d\u1ee5ng k\u00e9o s\u00e2u do c\u00f3 \u0111\u1ed9 d\u1ebbo t\u1ed1t v\u00e0 \u0111\u1ed9 b\u1ec1n cao.<\/li><\/ul><h3 class=\"wp-block-heading\"><strong>H\u00e0n<\/strong><\/h3><ul class=\"wp-block-list\"><li><strong>Kh\u1ea3 n\u0103ng h\u00e0n<\/strong>: Th\u00e9p kh\u00f4ng g\u1ec9 444 c\u00f3 kh\u1ea3 n\u0103ng h\u00e0n v\u1eeba ph\u1ea3i. N\u00f3 c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c h\u00e0n b\u1eb1ng c\u00e1c ph\u01b0\u01a1ng ph\u00e1p ti\u00eau chu\u1ea9n nh\u01b0 <strong>TIG<\/strong>, <strong>MIG<\/strong>v\u00e0 h\u00e0n \u0111i\u1ec7n tr\u1edf. Do c\u00f3 h\u00e0m l\u01b0\u1ee3ng carbon v\u00e0 titan ho\u1eb7c niobi th\u1ea5p n\u00ean nguy c\u01a1 \u0103n m\u00f2n gi\u1eefa c\u00e1c h\u1ea1t \u0111\u01b0\u1ee3c gi\u1ea3m thi\u1ec3u.<\/li>\n\n<li><strong>C\u00e1c bi\u1ec7n ph\u00e1p ph\u00f2ng ng\u1eeba<\/strong>: Th\u00f4ng th\u01b0\u1eddng kh\u00f4ng c\u1ea7n ph\u1ea3i l\u00e0m n\u00f3ng tr\u01b0\u1edbc, nh\u01b0ng c\u00f3 th\u1ec3 c\u1ea7n ph\u1ea3i \u1ee7 sau khi h\u00e0n \u0111\u1ec3 ph\u1ee5c h\u1ed3i kh\u1ea3 n\u0103ng ch\u1ed1ng \u0103n m\u00f2n v\u00e0 gi\u1ea3m nguy c\u01a1 n\u1ee9t trong c\u00e1c \u1ee9ng d\u1ee5ng ch\u1ecbu \u1ee9ng su\u1ea5t cao.<\/li>\n\n<li><strong>V\u1eadt li\u1ec7u \u0111\u1ed9n<\/strong>:V\u1eadt li\u1ec7u \u0111\u1ed9n \u0111\u01b0\u1ee3c khuy\u1ebfn ngh\u1ecb th\u01b0\u1eddng l\u00e0 308L ho\u1eb7c 316L \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o kh\u1ea3 n\u0103ng t\u01b0\u01a1ng th\u00edch v\u1edbi kim lo\u1ea1i c\u01a1 b\u1ea3n.<\/li><\/ul><h3 class=\"wp-block-heading\"><strong>C\u1eaft<\/strong><\/h3><ul class=\"wp-block-list\"><li><strong>C\u1eaft Laser<\/strong>: Th\u00edch h\u1ee3p cho th\u00e9p kh\u00f4ng g\u1ec9 444 do \u0111\u1ed9 ch\u00ednh x\u00e1c v\u00e0 kh\u1ea3 n\u0103ng c\u1eaft s\u1ea1ch, \u0111\u1eb7c bi\u1ec7t l\u00e0 \u1edf c\u00e1c ph\u1ea7n m\u1ecfng.<\/li>\n\n<li><strong>C\u1eaft Plasma<\/strong>:Th\u00edch h\u1ee3p cho c\u00e1c ph\u1ea7n d\u00e0y h\u01a1n, nh\u01b0ng c\u1ea7n l\u01b0u \u00fd tr\u00e1nh c\u00e1c v\u00f9ng ch\u1ecbu \u1ea3nh h\u01b0\u1edfng c\u1ee7a nhi\u1ec7t v\u00ec c\u00f3 th\u1ec3 \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn kh\u1ea3 n\u0103ng ch\u1ed1ng \u0103n m\u00f2n.<\/li>\n\n<li><strong>C\u1eaft c\u01a1 kh\u00ed<\/strong>: C\u1eaft v\u00e0 d\u1eadp th\u01b0\u1eddng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng cho c\u00e1c ph\u1ea7n m\u1ecfng h\u01a1n c\u1ee7a th\u00e9p kh\u00f4ng g\u1ec9 444. C\u1eaft b\u1eb1ng tia n\u01b0\u1edbc m\u00e0i m\u00f2n c\u0169ng c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 c\u1eaft s\u1ea1ch m\u00e0 kh\u00f4ng c\u1ea7n t\u1ecfa nhi\u1ec7t.<\/li><\/ul><h3 class=\"wp-block-heading\"><strong>L\u00e0m vi\u1ec7c n\u00f3ng<\/strong><\/h3><ul class=\"wp-block-list\"><li><strong>R\u00e8n n\u00f3ng<\/strong>: Vi\u1ec7c r\u00e8n th\u00e9p kh\u00f4ng g\u1ec9 444 n\u00ean \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n gi\u1eefa <strong>1100\u00b0C v\u00e0 1300\u00b0C (2012\u00b0F \u0111\u1ebfn 2372\u00b0F)<\/strong>. Sau khi gia c\u00f4ng n\u00f3ng, n\u00ean \u1ee7 \u0111\u1ec3 gi\u1ea3m \u1ee9ng su\u1ea5t v\u00e0 ph\u1ee5c h\u1ed3i c\u00e1c \u0111\u1eb7c t\u00ednh c\u1ee7a v\u1eadt li\u1ec7u.<\/li>\n\n<li><strong>C\u00e1n n\u00f3ng<\/strong>:C\u00e1n n\u00f3ng c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n \u1edf nhi\u1ec7t \u0111\u1ed9 cao trong c\u00f9ng ph\u1ea1m vi nh\u01b0 r\u00e8n v\u00e0 \u0111i\u1ec1u c\u1ea7n thi\u1ebft l\u00e0 ph\u1ea3i \u1ee7 v\u1eadt li\u1ec7u sau \u0111\u00f3 \u0111\u1ec3 tr\u00e1nh b\u1ecb gi\u00f2n.<\/li>\n\n<li><strong>L\u00e0m m\u00e1t<\/strong>:Sau khi gia c\u00f4ng n\u00f3ng, c\u1ea7n ph\u1ea3i l\u00e0m ngu\u1ed9i nhanh \u0111\u1ec3 ng\u0103n ng\u1eeba hi\u1ec7n t\u01b0\u1ee3ng gi\u00f2n do s\u1ef1 ph\u00e1t tri\u1ec3n c\u1ee7a h\u1ea1t ferit.<\/li><\/ul><h3 class=\"wp-block-heading\"><strong>L\u00e0m vi\u1ec7c l\u1ea1nh<\/strong><\/h3><ul class=\"wp-block-list\"><li><strong>C\u00e1n ngu\u1ed9i<\/strong>: Th\u00e9p kh\u00f4ng g\u1ec9 444 c\u00f3 th\u1ec3 c\u00e1n ngu\u1ed9i v\u00e0 ph\u1ea3n \u1ee9ng t\u1ed1t v\u1edbi qu\u00e1 tr\u00ecnh l\u00e0m c\u1ee9ng, m\u1eb7c d\u00f9 kh\u00f4ng c\u1ee9ng b\u1eb1ng th\u00e9p austenit. C\u00e1n ngu\u1ed9i c\u1ea3i thi\u1ec7n \u0111\u1ed9 ho\u00e0n thi\u1ec7n b\u1ec1 m\u1eb7t v\u00e0 \u0111\u1ed9 b\u1ec1n c\u01a1 h\u1ecdc.<\/li>\n\n<li><strong>U\u1ed1n l\u1ea1nh<\/strong>: C\u00f3 th\u1ec3 u\u1ed1n cong \u0111\u01a1n gi\u1ea3n, nh\u01b0ng u\u1ed1n cong ch\u1eb7t ho\u1eb7c gia c\u00f4ng ngu\u1ed9i nhi\u1ec1u c\u00f3 th\u1ec3 c\u1ea7n \u1ee7 trung gian \u0111\u1ec3 tr\u00e1nh n\u1ee9t.<\/li>\n\n<li><strong>V\u1ebd l\u1ea1nh<\/strong>:C\u00f3 th\u1ec3 k\u00e9o d\u00e2y ho\u1eb7c \u1ed1ng b\u1eb1ng 444, nh\u01b0ng c\u00f3 th\u1ec3 c\u1ea7n ph\u1ea3i \u1ee7 trung gian do hi\u1ec7u \u1ee9ng l\u00e0m c\u1ee9ng khi gia c\u00f4ng.<\/li><\/ul><h3 class=\"wp-block-heading\"><strong>X\u1eed l\u00fd nhi\u1ec7t<\/strong><\/h3><ul class=\"wp-block-list\"><li><strong>\u1ee6<\/strong>: Sau khi gia c\u00f4ng ngu\u1ed9i ho\u1eb7c t\u1ea1o h\u00ecnh n\u00f3ng, qu\u00e1 tr\u00ecnh \u1ee7 ph\u1ea3i \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n \u1edf nhi\u1ec7t \u0111\u1ed9 t\u1eeb <strong>760\u00b0C v\u00e0 815\u00b0C (1400\u00b0F \u0111\u1ebfn 1500\u00b0F)<\/strong> \u0111\u1ec3 l\u00e0m m\u1ec1m v\u1eadt li\u1ec7u v\u00e0 ph\u1ee5c h\u1ed3i kh\u1ea3 n\u0103ng ch\u1ed1ng \u0103n m\u00f2n c\u1ee7a v\u1eadt li\u1ec7u.<\/li>\n\n<li><strong>Gi\u1ea3m c\u0103ng th\u1eb3ng<\/strong>: \u1ee6 gi\u1ea3m \u1ee9ng su\u1ea5t \u1edf nhi\u1ec7t \u0111\u1ed9 th\u1ea5p (kho\u1ea3ng <strong>200\u00b0C \u0111\u1ebfn 300\u00b0C<\/strong>) c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c \u00e1p d\u1ee5ng \u0111\u1ec3 gi\u1ea3m \u1ee9ng su\u1ea5t b\u00ean trong m\u00e0 kh\u00f4ng l\u00e0m thay \u0111\u1ed5i \u0111\u00e1ng k\u1ec3 c\u00e1c t\u00ednh ch\u1ea5t c\u01a1 h\u1ecdc.<\/li>\n\n<li><strong>L\u00e0m c\u1ee9ng<\/strong>: Gi\u1ed1ng nh\u01b0 h\u1ea7u h\u1ebft c\u00e1c lo\u1ea1i th\u00e9p kh\u00f4ng g\u1ec9 ferritic, <strong>444 kh\u00f4ng th\u1ec3 \u0111\u01b0\u1ee3c l\u00e0m c\u1ee9ng b\u1eb1ng c\u00e1ch x\u1eed l\u00fd nhi\u1ec7t<\/strong>, v\u00ec n\u00f3 kh\u00f4ng tr\u1ea3i qua qu\u00e1 tr\u00ecnh chuy\u1ec3n \u0111\u1ed5i pha nh\u01b0 c\u00e1c lo\u1ea1i th\u00e9p martensitic.<\/li><\/ul><h3 class=\"wp-block-heading\">X\u1eed l\u00fd b\u1ec1 m\u1eb7t<\/h3><p>X\u1eed l\u00fd b\u1ec1 m\u1eb7t cho th\u00e9p kh\u00f4ng g\u1ec9 444, ch\u1eb3ng h\u1ea1n nh\u01b0 t\u1ea9y, th\u1ee5 \u0111\u1ed9ng h\u00f3a v\u00e0 \u0111\u00e1nh b\u00f3ng, l\u00e0 \u0111i\u1ec1u c\u1ea7n thi\u1ebft \u0111\u1ec3 duy tr\u00ec kh\u1ea3 n\u0103ng ch\u1ed1ng \u0103n m\u00f2n v\u00e0 \u0111\u1ea3m b\u1ea3o b\u1ec1 m\u1eb7t s\u1ea1ch s\u1ebd, th\u1ea9m m\u1ef9. C\u00e1c ph\u01b0\u01a1ng ph\u00e1p x\u1eed l\u00fd n\u00e0y \u0111\u1eb7c bi\u1ec7t quan tr\u1ecdng trong c\u00e1c ng\u00e0nh c\u00f4ng nghi\u1ec7p nh\u01b0 ch\u1ebf bi\u1ebfn th\u1ef1c ph\u1ea9m v\u00e0 d\u01b0\u1ee3c ph\u1ea9m.<\/p><h2 class=\"wp-block-heading\">S\u1ef1 kh\u00e1c bi\u1ec7t gi\u1eefa th\u00e9p kh\u00f4ng g\u1ec9 304, 316, 316L v\u00e0 444 l\u00e0 g\u00ec?<\/h2><h3 class=\"wp-block-heading\">Th\u00e9p kh\u00f4ng g\u1ec9 444 so v\u1edbi 304<\/h3><ul class=\"wp-block-list\"><li><a href=\"https:\/\/steelprogroup.com\/vi\/stainless-steel\/grades\/grade-304\/\">Th\u00e9p kh\u00f4ng g\u1ec9 304<\/a> kh\u00f4ng c\u00f3 kh\u1ea3 n\u0103ng ch\u1ed1ng \u0103n m\u00f2n clorua tuy\u1ec7t v\u1eddi nh\u01b0 th\u00e9p 444, khi\u1ebfn n\u00f3 \u00edt ph\u00f9 h\u1ee3p \u0111\u1ec3 s\u1eed d\u1ee5ng trong m\u00f4i tr\u01b0\u1eddng bi\u1ec3n v\u00e0 h\u00f3a ch\u1ea5t.\u00a0<\/li>\n\n<li>Th\u00e9p kh\u00f4ng g\u1ec9 304 kh\u00f4ng c\u00f3 t\u1eeb t\u00ednh, trong khi th\u00e9p kh\u00f4ng g\u1ec9 444 c\u00f3 t\u1eeb t\u00ednh.<\/li><\/ul><h3 class=\"wp-block-heading\">Th\u00e9p kh\u00f4ng g\u1ec9 444 so v\u1edbi 316<\/h3><ul class=\"wp-block-list\"><li><a href=\"https:\/\/steelprogroup.com\/vi\/stainless-steel\/grades\/grade-316\/\">316<\/a> \u0111\u1eaft h\u01a1n, ch\u1ee7 y\u1ebfu l\u00e0 do h\u00e0m l\u01b0\u1ee3ng niken cao.\u00a0<\/li>\n\n<li>Th\u00e9p 316 c\u00f3 \u0111\u1eb7c t\u00ednh t\u1ea1o h\u00ecnh co gi\u00e3n t\u1ed1t h\u01a1n, gi\u00fap n\u00f3 c\u00f3 l\u1ee3i th\u1ebf h\u01a1n trong c\u00e1c \u1ee9ng d\u1ee5ng \u0111\u00f2i h\u1ecfi \u0111\u1ed9 d\u1ebbo cao h\u01a1n.&nbsp;<\/li>\n\n<li>316 kh\u00f4ng c\u00f3 t\u1eeb t\u00ednh, trong khi 444 c\u00f3 t\u1eeb t\u00ednh.<\/li><\/ul><h3 class=\"wp-block-heading\">Th\u00e9p kh\u00f4ng g\u1ec9 444 so v\u1edbi 316L<\/h3><ul class=\"wp-block-list\"><li>316L c\u00f3 kh\u1ea3 n\u0103ng ch\u1ed1ng \u0103n m\u00f2n clorua t\u1ed1t h\u01a1n, \u0111\u1eb7c bi\u1ec7t l\u00e0 \u1edf c\u00e1c khu v\u1ef1c h\u00e0n.&nbsp;<\/li>\n\n<li>316L c\u0169ng kh\u00f4ng c\u00f3 t\u1eeb t\u00ednh, trong khi 444 c\u00f3 t\u1eeb t\u00ednh.&nbsp;<\/li>\n\n<li>Th\u00e9p 444 c\u00f3 hi\u1ec7u qu\u1ea3 v\u1ec1 m\u1eb7t chi ph\u00ed h\u01a1n do h\u00e0m l\u01b0\u1ee3ng niken th\u1ea5p h\u01a1n.<\/li><\/ul><h2 class=\"wp-block-heading\">Th\u00e9p kh\u00f4ng g\u1ec9 444 c\u00f3 t\u1eeb t\u00ednh kh\u00f4ng?<\/h2><p>V\u00e2ng, th\u00e9p kh\u00f4ng g\u1ec9 444 l\u00e0 <a href=\"https:\/\/steelprogroup.com\/vi\/stainless-steel\/properties\/magnetic\/\">t\u1eeb t\u00ednh<\/a>. L\u00e0 m\u1ed9t lo\u1ea1i th\u00e9p kh\u00f4ng g\u1ec9 ferritic, n\u00f3 c\u00f3 c\u1ea5u tr\u00fac tinh th\u1ec3 l\u1eadp ph\u01b0\u01a1ng t\u00e2m kh\u1ed1i th\u1ec3 hi\u1ec7n t\u00ednh ch\u1ea5t t\u1eeb t\u00ednh.\u00a0<\/p><h2 class=\"wp-block-heading\">Th\u00e9p kh\u00f4ng g\u1ec9 444 c\u00f3 t\u1ed1t kh\u00f4ng?<\/h2><p>Th\u00e9p kh\u00f4ng g\u1ec9 444 l\u00e0 v\u1eadt li\u1ec7u ch\u1ea5t l\u01b0\u1ee3ng cao c\u00f3 kh\u1ea3 n\u0103ng ch\u1ed1ng \u0103n m\u00f2n clorua v\u00e0 ph\u00f9 h\u1ee3p \u0111\u1ec3 s\u1eed d\u1ee5ng trong m\u00f4i tr\u01b0\u1eddng bi\u1ec3n v\u00e0 nh\u00e0 m\u00e1y h\u00f3a ch\u1ea5t, trong s\u1ed1 c\u00e1c \u1ee9ng d\u1ee5ng kh\u00e1c. N\u00f3 n\u1ed5i tr\u1ed9i v\u1ec1 kh\u1ea3 n\u0103ng ch\u1ed1ng r\u1ed7 v\u00e0 \u0103n m\u00f2n khe h\u1edf, c\u00f3 \u0111\u1ed9 b\u1ec1n c\u01a1 h\u1ecdc v\u00e0 kh\u1ea3 n\u0103ng h\u00e0n t\u1ed1t, v\u00e0 ti\u1ebft ki\u1ec7m chi ph\u00ed. M\u1eb7c d\u00f9 kh\u00f4ng d\u1ebbo nh\u01b0 th\u00e9p kh\u00f4ng g\u1ec9 austenit, nh\u01b0ng t\u00ednh ch\u1ea5t t\u1eeb t\u00ednh v\u00e0 t\u00ednh linh ho\u1ea1t c\u1ee7a n\u00f3 l\u00e0m cho n\u00f3 c\u00f3 gi\u00e1 tr\u1ecb trong nhi\u1ec1u \u1ee9ng d\u1ee5ng c\u00f4ng nghi\u1ec7p.<\/p><h2 class=\"wp-block-heading\">Nh\u00e0 s\u1ea3n xu\u1ea5t th\u00e9p kh\u00f4ng g\u1ec9 444<\/h2><p>L\u00e0 nh\u00e0 s\u1ea3n xu\u1ea5t v\u00e0 cung c\u1ea5p th\u00e9p kh\u00f4ng g\u1ec9 444, SteelPRO Group chuy\u00ean s\u1ea3n xu\u1ea5t th\u00e9p kh\u00f4ng g\u1ec9 444 \u0111\u00e1p \u1ee9ng c\u00e1c ti\u00eau chu\u1ea9n kh\u1eaft khe nh\u1ea5t, v\u1edbi chuy\u00ean m\u00f4n v\u00e0 s\u1ef1 \u0111\u1ed5i m\u1edbi \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o s\u1ea3n ph\u1ea9m v\u1eeba \u0111\u00e1ng tin c\u1eady v\u1eeba b\u1ec1n b\u1ec9.<\/p><ul class=\"wp-block-list\"><li><strong>S\u1ea3n xu\u1ea5t ti\u00ean ti\u1ebfn:<\/strong> S\u1eed d\u1ee5ng thi\u1ebft b\u1ecb hi\u1ec7n \u0111\u1ea1i, ch\u00fang t\u00f4i cung c\u1ea5p nhi\u1ec1u lo\u1ea1i s\u1ea3n ph\u1ea9m v\u1edbi k\u00edch th\u01b0\u1edbc v\u00e0 \u0111\u1ed9 d\u00e0y t\u00f9y ch\u1ec9nh \u0111\u1ec3 \u0111\u00e1p \u1ee9ng nhu c\u1ea7u c\u1ee7a nhi\u1ec1u d\u1ef1 \u00e1n kh\u00e1c nhau.<\/li><\/ul><ul class=\"wp-block-list\"><li><strong>T\u00f9y ch\u1ec9nh linh ho\u1ea1t:<\/strong> Nhi\u1ec1u t\u00f9y ch\u1ecdn t\u00f9y ch\u1ec9nh, bao g\u1ed3m x\u1eed l\u00fd b\u1ec1 m\u1eb7t v\u00e0 \u0111i\u1ec1u ch\u1ec9nh t\u00ednh ch\u1ea5t c\u01a1 h\u1ecdc, ph\u00f9 h\u1ee3p ch\u00ednh x\u00e1c v\u1edbi c\u00e1c \u1ee9ng d\u1ee5ng c\u1ee7a kh\u00e1ch h\u00e0ng.<\/li><\/ul><ul class=\"wp-block-list\"><li><strong>\u0110\u1ea3m b\u1ea3o ch\u1ea5t l\u01b0\u1ee3ng:<\/strong> M\u1ed7i l\u00f4 s\u1ea3n ph\u1ea9m \u0111\u1ec1u tr\u1ea3i qua qu\u00e1 tr\u00ecnh ki\u1ec3m tra nghi\u00eam ng\u1eb7t v\u00e0 \u0111\u00e1p \u1ee9ng c\u00e1c ti\u00eau chu\u1ea9n qu\u1ed1c t\u1ebf nh\u01b0 ASTM v\u00e0 JIS, do \u0111\u00f3 b\u1ea1n c\u00f3 th\u1ec3 y\u00ean t\u00e2m v\u1ec1 ch\u1ea5t l\u01b0\u1ee3ng.<\/li><\/ul><ul class=\"wp-block-list\"><li><strong>S\u1ea3n xu\u1ea5t xanh:<\/strong> Cam k\u1ebft ph\u00e1t tri\u1ec3n b\u1ec1n v\u1eefng, gi\u1ea3m t\u00e1c \u0111\u1ed9ng \u0111\u1ebfn m\u00f4i tr\u01b0\u1eddng v\u00e0 s\u1ea3n xu\u1ea5t th\u00e9p kh\u00f4ng g\u1ec9 ch\u1ea5t l\u01b0\u1ee3ng cao th\u00e2n thi\u1ec7n v\u1edbi m\u00f4i tr\u01b0\u1eddng.<\/li><\/ul>","protected":false},"excerpt":{"rendered":"<p>444 stainless steel is a ferritic stainless steel known for its excellent corrosion resistance. We introduce 444 stainless steel in [&hellip;]<\/p>","protected":false},"author":1,"featured_media":10931,"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-10955","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\/10955","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=10955"}],"version-history":[{"count":0,"href":"https:\/\/steelprogroup.com\/vi\/wp-json\/wp\/v2\/posts\/10955\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/steelprogroup.com\/vi\/wp-json\/wp\/v2\/media\/10931"}],"wp:attachment":[{"href":"https:\/\/steelprogroup.com\/vi\/wp-json\/wp\/v2\/media?parent=10955"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/steelprogroup.com\/vi\/wp-json\/wp\/v2\/categories?post=10955"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/steelprogroup.com\/vi\/wp-json\/wp\/v2\/tags?post=10955"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}