{"id":3266,"date":"2026-04-07T11:02:53","date_gmt":"2026-04-07T03:02:53","guid":{"rendered":"https:\/\/xzfastener.com\/?p=3266"},"modified":"2026-04-07T11:34:29","modified_gmt":"2026-04-07T03:34:29","slug":"304-vs-316-stainless-steel-bolts-which-one-is-better","status":"publish","type":"post","link":"https:\/\/xzfastener.com\/vi\/304-vs-316-stainless-steel-bolts-which-one-is-better\/","title":{"rendered":"304 so v\u1edbi 316 Bu l\u00f4ng th\u00e9p kh\u00f4ng g\u1ec9: C\u00e1i n\u00e0o t\u1ed1t h\u01a1n?"},"content":{"rendered":"<h3 class=\"wp-block-heading\">Bu l\u00f4ng th\u00e9p kh\u00f4ng g\u1ec9 304 v\u00e0 316 l\u00e0 g\u00ec?<\/h3>\n\n\n\n<p>C\u1ea3 304 v\u00e0 316 \u0111\u1ec1u thu\u1ed9c h\u1ecd th\u00e9p kh\u00f4ng g\u1ec9 austenit, \u0111\u01b0\u1ee3c bi\u1ebft \u0111\u1ebfn v\u1edbi kh\u1ea3 n\u0103ng \u0111\u1ecbnh h\u00ecnh v\u00e0 kh\u1ea3 n\u0103ng ch\u1ed1ng \u0103n m\u00f2n tuy\u1ec7t v\u1eddi. S\u1ef1 kh\u00e1c bi\u1ec7t c\u1ed1t l\u00f5i n\u1eb1m \u1edf th\u00e0nh ph\u1ea7n h\u00f3a h\u1ecdc c\u1ee7a ch\u00fang:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>304 th\u00e9p kh\u00f4ng g\u1ec9 (ISO k\u00fd hi\u1ec7u: A2)<\/strong>: Ch\u1ee9a 18-20% crom v\u00e0 8-10.5% niken, th\u01b0\u1eddng \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 &#8220;18-8&#8221; kh\u00f4ng g\u1ec9. \u0110\u00e2y l\u00e0 lo\u1ea1i th\u00e9p kh\u00f4ng g\u1ec9 c\u01a1 b\u1ea3n v\u00e0 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng r\u1ed9ng r\u00e3i nh\u1ea5t.<\/li>\n\n\n\n<li><strong>316 th\u00e9p kh\u00f4ng g\u1ec9 (ISO k\u00fd hi\u1ec7u: A4)<\/strong>: Ch\u1ee9a 16-18% crom, 10-14% niken, v\u00e0 <strong>2-3% molypden<\/strong>. Vi\u1ec7c b\u1ed5 sung molypden duy nh\u1ea5t n\u00e0y l\u00e0 nguy\u00ean nh\u00e2n g\u00e2y ra g\u1ea7n nh\u01b0 t\u1ea5t c\u1ea3 s\u1ef1 kh\u00e1c bi\u1ec7t v\u1ec1 hi\u1ec7u su\u1ea5t gi\u1eefa hai lo\u1ea1i.<\/li>\n<\/ul>\n\n\n\n<p>C\u1ea3 hai lo\u1ea1i \u0111\u1ec1u kh\u00f4ng c\u00f3 t\u1eeb t\u00ednh \u1edf tr\u1ea1ng th\u00e1i \u0111\u01b0\u1ee3c \u1ee7 ho\u00e0n to\u00e0n, m\u1eb7c d\u00f9 ch\u00fang c\u00f3 th\u1ec3 tr\u1edf n\u00ean c\u00f3 t\u1eeb t\u00ednh nh\u1eb9 sau c\u00e1c qu\u00e1 tr\u00ecnh gia c\u00f4ng ngu\u1ed9i nh\u01b0 c\u00e1n ren.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">So s\u00e1nh hi\u1ec7u su\u1ea5t tr\u1ef1c ti\u1ebfp<\/h3>\n\n\n\n<p>Ch\u00fang t\u00f4i s\u1ebd so s\u00e1nh hai c\u1ea5p \u0111\u1ed9 theo c\u00e1c y\u1ebfu t\u1ed1 quan tr\u1ecdng nh\u1ea5t \u0111\u1ed1i v\u1edbi hi\u1ec7u su\u1ea5t c\u1ee7a chi ti\u1ebft si\u1ebft ch\u1eb7t:<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">Ch\u1ed1ng \u0103n m\u00f2n<\/h4>\n\n\n\n<p>\u0110\u00e2y l\u00e0 \u0111i\u1ec3m kh\u00e1c bi\u1ec7t quan tr\u1ecdng nh\u1ea5t gi\u1eefa bu l\u00f4ng 304 v\u00e0 316.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>304<\/strong>: Cung c\u1ea5p kh\u1ea3 n\u0103ng ch\u1ed1ng \u0103n m\u00f2n n\u00f3i chung t\u1ed1t trong \u0111i\u1ec1u ki\u1ec7n kh\u00ed quy\u1ec3n, n\u01b0\u1edbc ng\u1ecdt v\u00e0 h\u1ea7u h\u1ebft c\u00e1c h\u00f3a ch\u1ea5t v\u00f4 c\u01a1 v\u00e0 h\u1eefu c\u01a1 nh\u1eb9. N\u00f3 s\u1ebd ch\u1ed1ng g\u1ec9 \u1edf h\u1ea7u h\u1ebft c\u00e1c m\u00f4i tr\u01b0\u1eddng trong nh\u00e0 v\u00e0 nh\u1eefng n\u01a1i kh\u00f4 r\u00e1o ngo\u00e0i tr\u1eddi.<\/li>\n\n\n\n<li><strong>316<\/strong>: Cung c\u1ea5p kh\u1ea3 n\u0103ng ch\u1ed1ng \u0103n m\u00f2n v\u01b0\u1ee3t tr\u1ed9i \u0111\u00e1ng k\u1ec3, \u0111\u1eb7c bi\u1ec7t \u0111\u1ed1i v\u1edbi <strong>ion clorua<\/strong> \u0111\u01b0\u1ee3c t\u00ecm th\u1ea5y trong n\u01b0\u1edbc m\u1eb7n, mu\u1ed1i l\u00e0m tan b\u0103ng v\u00e0 nhi\u1ec1u ch\u1ea5t t\u1ea9y r\u1eeda c\u00f4ng nghi\u1ec7p. Molypden c\u1ea3i thi\u1ec7n \u0111\u00e1ng k\u1ec3 kh\u1ea3 n\u0103ng ch\u1ed1ng r\u1ed7 v\u00e0 \u0103n m\u00f2n k\u1ebd h\u1edf\u2014hai d\u1ea1ng h\u01b0 h\u1ecfng ph\u1ed5 bi\u1ebfn nh\u1ea5t \u0111\u1ed1i v\u1edbi \u1ed1c v\u00edt b\u1eb1ng th\u00e9p kh\u00f4ng g\u1ec9 trong m\u00f4i tr\u01b0\u1eddng kh\u1eafc nghi\u1ec7t.<\/li>\n<\/ul>\n\n\n\n<p><strong>S\u1ef1 th\u1eadt quan tr\u1ecdng<\/strong>: Trong m\u00f4i tr\u01b0\u1eddng ven bi\u1ec3n ho\u1eb7c bi\u1ec3n, c\u00e1c bu l\u00f4ng th\u01b0\u1eddng c\u00f3 d\u1ea5u hi\u1ec7u b\u1ecb \u0103n m\u00f2n trong v\u00f2ng 1-2 n\u0103m, trong khi c\u00e1c bu l\u00f4ng 316 \u0111\u01b0\u1ee3c b\u1ea3o tr\u00ec \u0111\u00fang c\u00e1ch c\u00f3 th\u1ec3 t\u1ed3n t\u1ea1i tr\u00ean 20. (304)<\/p>\n\n\n\n<p><strong>H\u1ea1n ch\u1ebf quan tr\u1ecdng<\/strong>: C\u1ea3 hai lo\u1ea1i \u0111\u1ec1u kh\u00f4ng ch\u1ecbu \u0111\u01b0\u1ee3c axit m\u1ea1nh (ch\u1eb3ng h\u1ea1n nh\u01b0 axit clohydric ho\u1eb7c axit sulfuric) ho\u1eb7c dung d\u1ecbch ki\u1ec1m \u0111\u1eadm \u0111\u1eb7c. \u0110\u1ed1i v\u1edbi nh\u1eefng \u1ee9ng d\u1ee5ng n\u00e0y, b\u1ea1n s\u1ebd c\u1ea7n c\u00e1c h\u1ee3p kim \u0111\u1eb7c bi\u1ec7t nh\u01b0 th\u00e9p kh\u00f4ng g\u1ec9 song c\u00f4ng.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">\u0110\u1ed9 b\u1ec1n c\u01a1 h\u1ecdc<\/h4>\n\n\n\n<p>\u1ede nhi\u1ec7t \u0111\u1ed9 ph\u00f2ng, bu l\u00f4ng 304 v\u00e0 316 c\u00f3 \u0111\u1eb7c t\u00ednh c\u01a1 h\u1ecdc g\u1ea7n nh\u01b0 gi\u1ed1ng h\u1ec7t nhau:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u0110\u1ed9 b\u1ec1n k\u00e9o: 500-700 MPa<\/li>\n\n\n\n<li>C\u01b0\u1eddng \u0111\u1ed9 n\u0103ng su\u1ea5t: 205-310 MPa<\/li>\n\n\n\n<li>\u0110\u1ed9 c\u1ee9ng: 201 HB<\/li>\n<\/ul>\n\n\n\n<p>\u1ede nhi\u1ec7t \u0111\u1ed9 tr\u00ean 500\u00b0C (932\u00b0F), 316 gi\u1eef \u0111\u01b0\u1ee3c \u0111\u1ed9 b\u1ec1n cao h\u01a1n m\u1ed9t ch\u00fat so v\u1edbi 304. \u0110\u1ed1i v\u1edbi h\u1ea7u h\u1ebft c\u00e1c \u1ee9ng d\u1ee5ng c\u00f3 m\u1ee5c \u0111\u00edch chung d\u01b0\u1edbi nhi\u1ec7t \u0111\u1ed9 n\u00e0y, \u0111\u1ed9 b\u1ec1n kh\u00f4ng ph\u1ea3i l\u00e0 y\u1ebfu t\u1ed1 ph\u00e2n bi\u1ec7t gi\u1eefa hai lo\u1ea1i.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">Hi\u1ec7u su\u1ea5t nhi\u1ec7t \u0111\u1ed9<\/h4>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>304<\/strong>: Th\u00edch h\u1ee3p cho ho\u1ea1t \u0111\u1ed9ng li\u00ean t\u1ee5c t\u1eeb -200\u00b0C (-328\u00b0F) \u0111\u1ebfn 870\u00b0C (1600\u00b0F)<\/li>\n\n\n\n<li><strong>316<\/strong>: Cung c\u1ea5p kh\u1ea3 n\u0103ng ch\u1ed1ng oxy h\u00f3a \u1edf nhi\u1ec7t \u0111\u1ed9 cao t\u1ed1t h\u01a1n, th\u00edch h\u1ee3p cho ho\u1ea1t \u0111\u1ed9ng li\u00ean t\u1ee5c \u1edf nhi\u1ec7t \u0111\u1ed9 l\u00ean t\u1edbi 925\u00b0C (1700\u00b0F)<\/li>\n\n\n\n<li>316 c\u0169ng c\u00f3 \u0111\u1ed9 d\u1ebbo dai \u1edf nhi\u1ec7t \u0111\u1ed9 th\u1ea5p t\u1ed1t h\u01a1n m\u1ed9t ch\u00fat \u1edf nhi\u1ec7t \u0111\u1ed9 \u0111\u00f4ng l\u1ea1nh<\/li>\n<\/ul>\n\n\n\n<h4 class=\"wp-block-heading\">Kh\u1ea3 n\u0103ng gia c\u00f4ng v\u00e0 \u0111\u1ecbnh d\u1ea1ng<\/h4>\n\n\n\n<p>C\u1ea3 hai lo\u1ea1i \u0111\u1ec1u d\u1ec5 d\u00e0ng gia c\u00f4ng v\u00e0 t\u1ea1o h\u00ecnh b\u1eb1ng c\u00e1ch s\u1eed d\u1ee5ng c\u00e1c k\u1ef9 thu\u1eadt ti\u00eau chu\u1ea9n. 304 d\u1ec5 gia c\u00f4ng h\u01a1n 316 m\u1ed9t ch\u00fat do h\u00e0m l\u01b0\u1ee3ng niken v\u00e0 molypden th\u1ea5p h\u01a1n. C\u1ea3 hai \u0111\u1ec1u c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c h\u00e0n b\u1eb1ng ph\u01b0\u01a1ng ph\u00e1p h\u00e0n th\u00e9p kh\u00f4ng g\u1ec9 ti\u00eau chu\u1ea9n.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">Chi ph\u00ed<\/h4>\n\n\n\n<p>\u0110\u00e2y l\u00e0 s\u1ef1 kh\u00e1c bi\u1ec7t l\u1edbn th\u1ee9 hai gi\u1eefa hai l\u1edbp:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>316 Bu l\u00f4ng th\u00e9p kh\u00f4ng g\u1ec9 th\u01b0\u1eddng c\u00f3 gi\u00e1 <strong>30-50% nhi\u1ec1u h\u01a1n<\/strong> h\u01a1n c\u00e1c bu l\u00f4ng t\u01b0\u01a1ng \u0111\u01b0\u01a1ng (304)<\/li>\n\n\n\n<li>Kho\u1ea3ng c\u00e1ch gi\u00e1 c\u00f3 th\u1ec3 m\u1edf r\u1ed9ng h\u01a1n n\u1eefa trong th\u1eddi k\u1ef3 bi\u1ebfn \u0111\u1ed9ng th\u1ecb tr\u01b0\u1eddng niken v\u00e0 molypden cao<\/li>\n\n\n\n<li>\u0110\u1ed1i v\u1edbi c\u00e1c d\u1ef1 \u00e1n l\u1edbn c\u1ea7n h\u00e0ng ngh\u00ecn bu l\u00f4ng, ch\u00eanh l\u1ec7ch chi ph\u00ed n\u00e0y c\u00f3 th\u1ec3 l\u00ean t\u1edbi h\u00e0ng ch\u1ee5c ngh\u00ecn \u0111\u00f4 la.<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Khi n\u00e0o n\u00ean s\u1eed d\u1ee5ng Bu l\u00f4ng th\u00e9p kh\u00f4ng g\u1ec9 (304)<\/h3>\n\n\n\n<p>304 bu l\u00f4ng l\u00e0 s\u1ef1 l\u1ef1a ch\u1ecdn t\u1ed1t nh\u1ea5t v\u00e0 ti\u1ebft ki\u1ec7m chi ph\u00ed nh\u1ea5t khi \u0111\u00e1p \u1ee9ng \u0111\u01b0\u1ee3c t\u1ea5t c\u1ea3 c\u00e1c \u0111i\u1ec1u ki\u1ec7n sau:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u1ee8ng d\u1ee5ng trong nh\u00e0 ho\u1eb7c \u1edf m\u00f4i tr\u01b0\u1eddng ngo\u00e0i tr\u1eddi kh\u00f4 r\u00e1o, \u00f4n h\u00f2a<\/li>\n\n\n\n<li>Kh\u00f4ng ti\u1ebfp x\u00fac v\u1edbi n\u01b0\u1edbc m\u1eb7n, mu\u1ed1i l\u00e0m tan b\u0103ng ho\u1eb7c n\u1ed3ng \u0111\u1ed9 clorua cao<\/li>\n\n\n\n<li>C\u00e1c bu l\u00f4ng s\u1ebd kh\u00f4ng ti\u1ebfp x\u00fac v\u1edbi c\u00e1c h\u00f3a ch\u1ea5t c\u00f4ng nghi\u1ec7p kh\u1eafc nghi\u1ec7t<\/li>\n\n\n\n<li>Chi ph\u00ed l\u00e0 m\u1ed9t s\u1ef1 c\u00e2n nh\u1eafc \u0111\u00e1ng k\u1ec3<\/li>\n<\/ul>\n\n\n\n<p><strong>C\u00e1c \u1ee9ng d\u1ee5ng \u0111i\u1ec3n h\u00ecnh c\u1ee7a bu l\u00f4ng (304)<\/strong>:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>X\u00e2y d\u1ef1ng v\u00e0 x\u00e2y d\u1ef1ng n\u00f3i chung<\/li>\n\n\n\n<li>L\u1eafp r\u00e1p m\u00e1y m\u00f3c, thi\u1ebft b\u1ecb trong nh\u00e0<\/li>\n\n\n\n<li>Thi\u1ebft b\u1ecb ch\u1ebf bi\u1ebfn th\u1ef1c ph\u1ea9m (\u0111\u1ed1i v\u1edbi th\u1ef1c ph\u1ea9m kh\u00f4ng m\u1eb7n, kh\u00f4ng chua)<\/li>\n\n\n\n<li>Trang tr\u00ed ki\u1ebfn tr\u00fac v\u00e0 \u0111\u1ed3 \u0111\u1ea1c<\/li>\n\n\n\n<li>Linh ki\u1ec7n \u00f4 t\u00f4<\/li>\n\n\n\n<li>H\u1ec7 th\u1ed1ng \u1ed1ng n\u01b0\u1edbc d\u00e2n d\u1ee5ng v\u00e0 HVAC<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Khi n\u00e0o n\u00ean s\u1eed d\u1ee5ng Bu l\u00f4ng th\u00e9p kh\u00f4ng g\u1ec9 (316)<\/h3>\n\n\n\n<p>316 bu l\u00f4ng kh\u00f4ng ch\u1ec9 l\u00e0 m\u1ed9t th\u1ee9 `t\u1ed1t h\u01a1n'; phi\u00ean b\u1ea3n c\u1ee7a 304\u2014ch\u00fang c\u1ea7n thi\u1ebft trong nh\u1eefng m\u00f4i tr\u01b0\u1eddng c\u1ee5 th\u1ec3. B\u1ea1n ph\u1ea3i s\u1eed d\u1ee5ng 316 bu l\u00f4ng th\u00e9p kh\u00f4ng g\u1ec9 n\u1ebfu:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u1ee8ng d\u1ee5ng \u1edf m\u00f4i tr\u01b0\u1eddng ven bi\u1ec3n ho\u1eb7c bi\u1ec3n (trong ph\u1ea1m vi 5 d\u1eb7m n\u01b0\u1edbc m\u1eb7n)<\/li>\n\n\n\n<li>C\u00e1c bu l\u00f4ng s\u1ebd ti\u1ebfp x\u00fac v\u1edbi b\u1ee5i mu\u1ed1i, mu\u1ed1i l\u00e0m tan b\u0103ng ho\u1eb7c n\u01b0\u1edbc l\u1ee3<\/li>\n\n\n\n<li>Thi\u1ebft b\u1ecb s\u1ebd \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong c\u00e1c c\u01a1 s\u1edf x\u1eed l\u00fd h\u00f3a ch\u1ea5t, d\u01b0\u1ee3c ph\u1ea9m ho\u1eb7c x\u1eed l\u00fd n\u01b0\u1edbc th\u1ea3i<\/li>\n\n\n\n<li>Hi\u1ec7u su\u1ea5t kh\u00f4ng c\u1ea7n b\u1ea3o tr\u00ec l\u00e2u d\u00e0i l\u00e0 r\u1ea5t quan tr\u1ecdng<\/li>\n\n\n\n<li>C\u00e1c bu l\u00f4ng s\u1ebd ho\u1ea1t \u0111\u1ed9ng \u1edf nhi\u1ec7t \u0111\u1ed9 tr\u00ean 800\u00b0C (1472\u00b0F)<\/li>\n<\/ul>\n\n\n\n<p><strong>C\u00e1c \u1ee9ng d\u1ee5ng \u0111i\u1ec3n h\u00ecnh c\u1ee7a bu l\u00f4ng (316)<\/strong>:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Thuy\u1ec1n v\u00e0 \u0111\u00f3ng t\u00e0u<\/li>\n\n\n\n<li>C\u1ea7u ven bi\u1ec3n v\u00e0 c\u01a1 s\u1edf h\u1ea1 t\u1ea7ng<\/li>\n\n\n\n<li>Nh\u00e0 m\u00e1y kh\u1eed mu\u1ed1i<\/li>\n\n\n\n<li>Thi\u1ebft b\u1ecb x\u1eed l\u00fd h\u00f3a ch\u1ea5t<\/li>\n\n\n\n<li>D\u1ee5ng c\u1ee5 y t\u1ebf v\u00e0 ph\u1eabu thu\u1eadt<\/li>\n\n\n\n<li>Thi\u1ebft b\u1ecb ch\u1ebf bi\u1ebfn th\u1ef1c ph\u1ea9m h\u1ea3i s\u1ea3n, s\u1eefa v\u00e0 c\u00e1c s\u1ea3n ph\u1ea9m c\u00f3 t\u00ednh axit<\/li>\n\n\n\n<li>N\u1ec1n t\u1ea3ng d\u1ea7u kh\u00ed ngo\u00e0i kh\u01a1i<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Nh\u1eefng sai l\u1ea7m ph\u1ed5 bi\u1ebfn c\u1ea7n tr\u00e1nh<\/h3>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>S\u1eed d\u1ee5ng 304 trong m\u00f4i tr\u01b0\u1eddng ven bi\u1ec3n<\/strong>: \u0110\u00e2y l\u00e0 sai l\u1ea7m th\u01b0\u1eddng g\u1eb7p nh\u1ea5t v\u00e0 t\u1ed1n k\u00e9m nh\u1ea5t. Ngay c\u1ea3 khi b\u1ea1n \u1edf s\u00e2u trong \u0111\u1ea5t li\u1ec1n, b\u1ee5i mu\u1ed1i c\u00f3 th\u1ec3 di chuy\u1ec3n nh\u1eefng kho\u1ea3ng c\u00e1ch \u0111\u00e1ng kinh ng\u1ea1c v\u00e0 khi\u1ebfn c\u00e1c bu l\u00f4ng b\u1ecb \u0103n m\u00f2n. (304)<\/li>\n\n\n\n<li><strong>X\u00e1c \u0111\u1ecbnh qu\u00e1 m\u1ee9c m\u1ed9t c\u00e1ch kh\u00f4ng c\u1ea7n thi\u1ebft (316)<\/strong>: S\u1eed d\u1ee5ng 316 bu l\u00f4ng trong c\u00e1c t\u00f2a nh\u00e0 v\u0103n ph\u00f2ng trong nh\u00e0 ho\u1eb7c kho kh\u00f4 l\u00e0 m\u1ed9t s\u1ef1 l\u00e3ng ph\u00ed ti\u1ec1n b\u1ea1c m\u00e0 kh\u00f4ng mang l\u1ea1i l\u1ee3i \u00edch thi\u1ebft th\u1ef1c.<\/li>\n\n\n\n<li><strong>Gi\u1ea3 s\u1eed t\u1ea5t c\u1ea3 \u0111\u1ec1u l\u00e0 th\u00e9p kh\u00f4ng g\u1ec9; bu l\u00f4ng gi\u1ed1ng nhau<\/strong>: Nhi\u1ec1u nh\u00e0 cung c\u1ea5p s\u1ebd b\u00e1n bu l\u00f4ng b\u1eb1ng th\u00e9p kh\u00f4ng g\u1ec9 ho\u1eb7c 430 d\u01b0\u1edbi d\u1ea1ng `8220;kh\u00f4ng g\u1ec9&#039; m\u00e0 kh\u00f4ng ghi r\u00f5 th\u1ee9 h\u1ea1ng. Ch\u00fang c\u00f3 kh\u1ea3 n\u0103ng ch\u1ed1ng \u0103n m\u00f2n k\u00e9m h\u01a1n nhi\u1ec1u so v\u1edbi 304.<\/li>\n\n\n\n<li><strong>B\u1ecf qua s\u1ef1 \u0103n m\u00f2n \u0111i\u1ec7n<\/strong>: Khi s\u1eed d\u1ee5ng bu l\u00f4ng inox b\u1eb1ng nh\u00f4m, th\u00e9p cacbon, \u0111\u1ed3ng c\u1ea7n s\u1eed d\u1ee5ng v\u00f2ng \u0111\u1ec7m c\u00e1ch \u0111i\u1ec7n \u0111\u1ec3 ch\u1ed1ng \u0103n m\u00f2n \u0111i\u1ec7n h\u00f3a.<\/li>\n\n\n\n<li><strong>B\u1ecf qua vi\u1ec7c ho\u00e0n thi\u1ec7n b\u1ec1 m\u1eb7t<\/strong>: Bu l\u00f4ng \u0111\u01b0\u1ee3c \u0111\u00e1nh b\u00f3ng b\u1eb1ng \u0111i\u1ec7n c\u00f3 kh\u1ea3 n\u0103ng ch\u1ed1ng \u0103n m\u00f2n t\u1ed1t h\u01a1n \u0111\u00e1ng k\u1ec3 so v\u1edbi bu l\u00f4ng ho\u00e0n thi\u1ec7n m\u00e1y nghi\u1ec1n ti\u00eau chu\u1ea9n trong m\u00f4i tr\u01b0\u1eddng kh\u1eafc nghi\u1ec7t. (316)<\/li>\n<\/ol>\n\n\n\n<h3 class=\"wp-block-heading\">M\u1eb9o mua h\u00e0ng th\u1ef1c t\u1ebf<\/h3>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>Lu\u00f4n ch\u1ec9 \u0111\u1ecbnh ch\u00ednh x\u00e1c l\u1edbp<\/strong>: Kh\u00f4ng bao gi\u1edd \u0111\u1eb7t mua `bu l\u00f4ng th\u00e9p kh\u00f4ng g\u1ec9.&amp;# 8221; Ch\u1ec9 \u0111\u1ecbnh bu l\u00f4ng th\u00e9p kh\u00f4ng g\u1ec9 `8220;304 (A2) b\u1eb1ng th\u00e9p kh\u00f4ng g\u1ec9&amp;# 8221; ho\u1eb7c `8220;316 (A4) bu l\u00f4ng th\u00e9p kh\u00f4ng g\u1ec9.&#8221;<\/li>\n\n\n\n<li><strong>Y\u00eau c\u1ea7u Ch\u1ee9ng ch\u1ec9 Ki\u1ec3m tra V\u1eadt li\u1ec7u (MTC)<\/strong>: C\u00e1c nh\u00e0 cung c\u1ea5p uy t\u00edn s\u1ebd cung c\u1ea5p c\u00e1c gi\u1ea5y ch\u1ee9ng nh\u1eadn x\u00e1c minh th\u00e0nh ph\u1ea7n h\u00f3a h\u1ecdc v\u00e0 t\u00ednh ch\u1ea5t c\u01a1 h\u1ecdc c\u1ee7a bu l\u00f4ng. (EN 10204)<\/li>\n\n\n\n<li><strong>H\u00e3y xem x\u00e9t s\u1ef1 k\u1ebft th\u00fac<\/strong>: \u0110\u1ed1i v\u1edbi c\u00e1c \u1ee9ng d\u1ee5ng h\u00e0ng h\u1ea3i ho\u1eb7c h\u00f3a h\u1ecdc, h\u00e3y ch\u1ec9 \u0111\u1ecbnh bu l\u00f4ng \u0111\u01b0\u1ee3c \u0111\u00e1nh b\u00f3ng b\u1eb1ng \u0111i\u1ec7n \u0111\u1ec3 c\u00f3 kh\u1ea3 n\u0103ng ch\u1ed1ng \u0103n m\u00f2n t\u1ed1i \u0111a.<\/li>\n\n\n\n<li><strong>Mua t\u1eeb nh\u00e0 cung c\u1ea5p chi ti\u1ebft si\u1ebft ch\u1eb7t chuy\u00ean d\u1ee5ng<\/strong>: C\u00e1c c\u1eeda h\u00e0ng ph\u1ea7n c\u1ee9ng t\u1ed5ng h\u1ee3p th\u01b0\u1eddng b\u00e1n bu l\u00f4ng th\u00e9p kh\u00f4ng g\u1ec9 ch\u1ea5t l\u01b0\u1ee3ng th\u1ea5p ho\u1eb7c b\u1ecb d\u00e1n nh\u00e3n sai.<\/li>\n\n\n\n<li><strong>T\u00ednh t\u1ed5ng chi ph\u00ed s\u1edf h\u1eefu<\/strong>: M\u1eb7c d\u00f9 chi ph\u00ed ban \u0111\u1ea7u c\u1ee7a bu l\u00f4ng cao h\u01a1n nh\u01b0ng ch\u00fang c\u00f3 th\u1ec3 gi\u00fap b\u1ea1n ti\u1ebft ki\u1ec7m chi ph\u00ed thay th\u1ebf v\u00e0 th\u1eddi gian ng\u1eebng ho\u1ea1t \u0111\u1ed9ng trong su\u1ed1t v\u00f2ng \u0111\u1eddi c\u1ee7a thi\u1ebft b\u1ecb nhi\u1ec1u h\u01a1n g\u1ea5p 5-10. (316)<\/li>\n<\/ol>\n\n\n\n<h2 class=\"wp-block-heading\">B\u00e0i h\u1ecdc ch\u00ednh<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li>S\u1ef1 kh\u00e1c bi\u1ec7t c\u1ed1t l\u00f5i gi\u1eefa bu l\u00f4ng 304 v\u00e0 316 l\u00e0 vi\u1ec7c b\u1ed5 sung 2-3% molypden trong 316, gi\u00fap c\u1ea3i thi\u1ec7n \u0111\u00e1ng k\u1ec3 kh\u1ea3 n\u0103ng ch\u1ed1ng \u0103n m\u00f2n clorua<\/li>\n\n\n\n<li>304 (A2) l\u00e0 s\u1ef1 l\u1ef1a ch\u1ecdn kinh t\u1ebf cho t\u1ea5t c\u1ea3 c\u00e1c \u1ee9ng d\u1ee5ng trong nh\u00e0 v\u00e0 ngo\u00e0i tr\u1eddi kh\u00f4 r\u00e1o m\u00e0 kh\u00f4ng ti\u1ebfp x\u00fac v\u1edbi mu\u1ed1i<\/li>\n\n\n\n<li>316 (A4) l\u00e0 b\u1eaft bu\u1ed9c \u0111\u1ed1i v\u1edbi m\u00f4i tr\u01b0\u1eddng bi\u1ec3n, ven bi\u1ec3n v\u00e0 h\u00f3a h\u1ecdc n\u01a1i c\u00f3 nguy c\u01a1 \u0103n m\u00f2n clorua<\/li>\n\n\n\n<li>\u1ede nhi\u1ec7t \u0111\u1ed9 ph\u00f2ng, bu l\u00f4ng v\u00e0 bu l\u00f4ng c\u00f3 \u0111\u1ed9 b\u1ec1n c\u01a1 h\u1ecdc g\u1ea7n nh\u01b0 gi\u1ed1ng nhau (304, 316)<\/li>\n\n\n\n<li>Bu l\u00f4ng th\u01b0\u1eddng c\u00f3 gi\u00e1 cao h\u01a1n 30-50% so v\u1edbi bu l\u00f4ng, nh\u01b0ng mang l\u1ea1i tu\u1ed5i th\u1ecd d\u00e0i h\u01a1n nhi\u1ec1u trong \u0111i\u1ec1u ki\u1ec7n kh\u1eafc nghi\u1ec7t (316, 304)<\/li>\n\n\n\n<li>Lu\u00f4n x\u00e1c minh lo\u1ea1i v\u1eadt li\u1ec7u b\u1eb1ng ch\u1ee9ng nh\u1eadn ki\u1ec3m tra ch\u00ednh th\u1ee9c \u0111\u1ec3 tr\u00e1nh s\u1ea3n ph\u1ea9m gi\u1ea3<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">FAQ<\/h2>\n\n\n\n<p><strong>H\u1ecfi: T\u00f4i c\u00f3 th\u1ec3 s\u1eed d\u1ee5ng 304 bu l\u00f4ng g\u1ea7n bi\u1ec3n kh\u00f4ng?<\/strong><\/p>\n\n\n\n<p>\u0110\u00e1p: Kh\u00f4ng. Ngay c\u1ea3 khi \u1edf s\u00e2u trong \u0111\u1ea5t li\u1ec1n, phun mu\u1ed1i c\u00f3 th\u1ec3 khi\u1ebfn bu l\u00f4ng b\u1ecb \u0103n m\u00f2n r\u1ed7 trong v\u00f2ng v\u00e0i n\u0103m. \u0110\u1ed1i v\u1edbi b\u1ea5t k\u1ef3 \u1ee9ng d\u1ee5ng ven bi\u1ec3n n\u00e0o, h\u00e3y s\u1eed d\u1ee5ng 316 bu l\u00f4ng th\u00e9p kh\u00f4ng g\u1ec9. (304)<\/p>\n\n\n\n<p><strong>H\u1ecfi: 316 c\u00f3 m\u1ea1nh h\u01a1n 304 kh\u00f4ng?<\/strong><\/p>\n\n\n\n<p>A: \u1ede nhi\u1ec7t \u0111\u1ed9 ph\u00f2ng th\u00ec kh\u00f4ng. Ch\u00fang c\u00f3 \u0111\u1ed9 b\u1ec1n k\u00e9o v\u00e0 n\u0103ng su\u1ea5t g\u1ea7n nh\u01b0 gi\u1ed1ng h\u1ec7t nhau. 316 ch\u1ec9 c\u00f3 m\u1ed9t ch\u00fat l\u1ee3i th\u1ebf v\u1ec1 \u0111\u1ed9 b\u1ec1n \u1edf nhi\u1ec7t \u0111\u1ed9 tr\u00ean 500\u00b0C (932\u00b0F).<\/p>\n\n\n\n<p><strong>H\u1ecfi: 304 v\u00e0 316 c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng c\u00f9ng nhau kh\u00f4ng?<\/strong><\/p>\n\n\n\n<p>\u0110: V\u00e2ng. V\u00ec ch\u00fang c\u00f9ng lo\u1ea1i th\u00e9p kh\u00f4ng g\u1ec9 n\u00ean kh\u00f4ng c\u00f3 hi\u1ec7n t\u01b0\u1ee3ng \u0103n m\u00f2n \u0111i\u1ec7n gi\u1eefa 304 v\u00e0 316. B\u1ea1n c\u00f3 th\u1ec3 tr\u1ed9n ch\u00fang m\u1ed9t c\u00e1ch an to\u00e0n trong c\u00f9ng m\u1ed9t t\u1ed5 h\u1ee3p.<\/p>\n\n\n\n<p><strong>H\u1ecfi: S\u1ef1 kh\u00e1c bi\u1ec7t gi\u1eefa A2 v\u00e0 304, v\u00e0 A4 v\u00e0 316 l\u00e0 g\u00ec?<\/strong><\/p>\n\n\n\n<p>A: A2 l\u00e0 k\u00fd hi\u1ec7u ISO c\u1ee7a Ch\u00e2u \u00c2u cho th\u00e9p kh\u00f4ng g\u1ec9, v\u00e0 A4 l\u00e0 k\u00fd hi\u1ec7u ISO cho th\u00e9p kh\u00f4ng g\u1ec9. H\u1ecd \u0111\u1ec1 c\u1eadp \u0111\u1ebfn c\u00e1c lo\u1ea1i v\u1eadt li\u1ec7u gi\u1ed1ng h\u1ec7t nhau. (304, 316)<\/p>\n\n\n\n<p><strong>H\u1ecfi: Li\u1ec7u c\u00e1c bu l\u00f4ng b\u1eb1ng th\u00e9p kh\u00f4ng g\u1ec9 c\u00f3 bao gi\u1edd b\u1ecb r\u1ec9 s\u00e9t kh\u00f4ng? (316)<\/strong><\/p>\n\n\n\n<p>\u0110: V\u00e2ng. 316 c\u00f3 kh\u1ea3 n\u0103ng ch\u1ed1ng v\u1ebft b\u1ea9n, kh\u00f4ng ch\u1ed1ng v\u1ebft b\u1ea9n. Trong \u0111i\u1ec1u ki\u1ec7n c\u1ef1c k\u1ef3 kh\u1eafc nghi\u1ec7t v\u1edbi n\u1ed3ng \u0111\u1ed9 clorua cao ho\u1eb7c ng\u00e2m l\u00e2u trong n\u01b0\u1edbc m\u1eb7n, 316 cu\u1ed1i c\u00f9ng c\u00f3 th\u1ec3 b\u1ecb \u0103n m\u00f2n. N\u00f3 ch\u1ec9 m\u1ea5t nhi\u1ec1u th\u1eddi gian h\u01a1n 304.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Conclusion<\/h2>\n\n\n\n<p>C\u00e0ng &#8220;t\u1ed1t h\u01a1n&#8221; bu l\u00f4ng th\u00e9p kh\u00f4ng g\u1ec9 kh\u00f4ng ph\u1ea3i l\u00fac n\u00e0o c\u0169ng ph\u00f9 h\u1ee3p\u2014n\u00f3 l\u00e0 lo\u1ea1i ph\u00f9 h\u1ee3p v\u1edbi y\u00eau c\u1ea7u \u1ee9ng d\u1ee5ng c\u1ee5 th\u1ec3 c\u1ee7a b\u1ea1n. (316)<\/p>\n\n\n\n<p>\u0110\u1ed1i v\u1edbi 80% c\u00e1c \u1ee9ng d\u1ee5ng c\u00f4ng nghi\u1ec7p n\u00f3i chung di\u1ec5n ra trong nh\u00e0 ho\u1eb7c \u1edf m\u00f4i tr\u01b0\u1eddng kh\u00f4 r\u00e1o, \u00f4n h\u00f2a ngo\u00e0i tr\u1eddi th\u00ec 304 bu l\u00f4ng inox l\u00e0 s\u1ef1 l\u1ef1a ch\u1ecdn t\u1ed1i \u01b0u. Ch\u00fang cung c\u1ea5p hi\u1ec7u su\u1ea5t tuy\u1ec7t v\u1eddi v\u1edbi chi ph\u00ed h\u1ee3p l\u00fd v\u00e0 s\u1ebd k\u00e9o d\u00e0i tu\u1ed5i th\u1ecd c\u1ee7a h\u1ea7u h\u1ebft c\u00e1c thi\u1ebft b\u1ecb.<\/p>\n\n\n\n<p>Tuy nhi\u00ean, \u0111\u1ed1i v\u1edbi 20% \u1ee9ng d\u1ee5ng li\u00ean quan \u0111\u1ebfn vi\u1ec7c ti\u1ebfp x\u00fac v\u1edbi n\u01b0\u1edbc m\u1eb7n, mu\u1ed1i l\u00e0m tan b\u0103ng ho\u1eb7c h\u00f3a ch\u1ea5t c\u00f4ng nghi\u1ec7p, 316 bu l\u00f4ng th\u00e9p kh\u00f4ng g\u1ec9 l\u00e0 kh\u00f4ng th\u1ec3 th\u01b0\u01a1ng l\u01b0\u1ee3ng. Chi ph\u00ed tr\u1ea3 tr\u01b0\u1edbc b\u1ed5 sung l\u00e0 m\u1ed9t c\u00e1i gi\u00e1 nh\u1ecf ph\u1ea3i tr\u1ea3 \u0111\u1ec3 tr\u00e1nh nh\u1eefng h\u01b0 h\u1ecfng nghi\u00eam tr\u1ecdng, c\u00e1c m\u1ed1i nguy hi\u1ec3m v\u1ec1 an to\u00e0n v\u00e0 vi\u1ec7c ng\u1eebng ho\u1ea1t \u0111\u1ed9ng t\u1ed1n k\u00e9m.<\/p>\n\n\n\n<p>Khi \u0111\u01b0a ra quy\u1ebft \u0111\u1ecbnh, h\u00e3y lu\u00f4n \u01b0u ti\u00ean m\u00f4i tr\u01b0\u1eddng m\u00e0 bu l\u00f4ng s\u1ebd ho\u1ea1t \u0111\u1ed9ng so v\u1edbi chi ph\u00ed ban \u0111\u1ea7u. Bu l\u00f4ng \u0111\u1eaft nh\u1ea5t m\u00e0 b\u1ea1n c\u00f3 th\u1ec3 mua l\u00e0 lo\u1ea1i bu l\u00f4ng b\u1ecb h\u1ecfng s\u1edbm v\u00e0 khi\u1ebfn to\u00e0n b\u1ed9 h\u1ec7 th\u1ed1ng c\u1ee7a b\u1ea1n b\u1ecb h\u1ecfng.<\/p>\n\n\n\n<p>N\u1ebfu b\u1ea1n v\u1eabn kh\u00f4ng ch\u1eafc ch\u1eafn lo\u1ea1i n\u00e0o ph\u00f9 h\u1ee3p v\u1edbi \u1ee9ng d\u1ee5ng c\u1ee5 th\u1ec3 c\u1ee7a m\u00ecnh, h\u00e3y tham kh\u1ea3o \u00fd ki\u1ebfn c\u1ee7a k\u1ef9 s\u01b0 chi ti\u1ebft si\u1ebft ch\u1eb7t c\u00f3 tr\u00ecnh \u0111\u1ed9, ng\u01b0\u1eddi c\u00f3 th\u1ec3 \u0111\u00e1nh gi\u00e1 \u0111i\u1ec1u ki\u1ec7n v\u1eadn h\u00e0nh c\u1ee7a b\u1ea1n v\u00e0 \u0111\u01b0a ra \u0111\u1ec1 xu\u1ea5t ch\u00ednh x\u00e1c.<\/p>","protected":false},"excerpt":{"rendered":"<p>What Are 304 and 316 Stainless Steel Bolts? Both 304 and 316 belong to the austenitic stainless steel family, known for their excellent formability and corrosion resistance. The core difference lies in their chemical composition: Both grades are non-magnetic in their fully annealed state, though they can become slightly magnetic after cold working processes like [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":3269,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[109],"tags":[],"class_list":["post-3266","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-technical-guides"],"acf":[],"_links":{"self":[{"href":"https:\/\/xzfastener.com\/vi\/wp-json\/wp\/v2\/posts\/3266","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/xzfastener.com\/vi\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/xzfastener.com\/vi\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/xzfastener.com\/vi\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/xzfastener.com\/vi\/wp-json\/wp\/v2\/comments?post=3266"}],"version-history":[{"count":1,"href":"https:\/\/xzfastener.com\/vi\/wp-json\/wp\/v2\/posts\/3266\/revisions"}],"predecessor-version":[{"id":3267,"href":"https:\/\/xzfastener.com\/vi\/wp-json\/wp\/v2\/posts\/3266\/revisions\/3267"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/xzfastener.com\/vi\/wp-json\/wp\/v2\/media\/3269"}],"wp:attachment":[{"href":"https:\/\/xzfastener.com\/vi\/wp-json\/wp\/v2\/media?parent=3266"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/xzfastener.com\/vi\/wp-json\/wp\/v2\/categories?post=3266"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/xzfastener.com\/vi\/wp-json\/wp\/v2\/tags?post=3266"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}