{"id":7339,"date":"2024-12-05T02:47:48","date_gmt":"2024-12-04T18:47:48","guid":{"rendered":"https:\/\/xzfastener.com\/?p=7339"},"modified":"2026-06-24T02:48:59","modified_gmt":"2026-06-23T18:48:59","slug":"12-9-grade-bolt-materials-risks-benefits-and-buying-guide","status":"publish","type":"post","link":"https:\/\/xzfastener.com\/vi\/12-9-grade-bolt-materials-risks-benefits-and-buying-guide\/","title":{"rendered":"12.9 V\u1eadt li\u1ec7u bu l\u00f4ng c\u1ea5p: R\u1ee7i ro, l\u1ee3i \u00edch v\u00e0 h\u01b0\u1edbng d\u1eabn mua h\u00e0ng"},"content":{"rendered":"<p>Bu l\u00f4ng lo\u1ea1i 12.9 l\u00e0 m\u1ed9t trong nh\u1eefng lo\u1ea1i \u1ed1c v\u00edt h\u1ec7 m\u00e9t c\u00f3 \u0111\u1ed9 b\u1ec1n cao nh\u1ea5t th\u01b0\u1eddng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong m\u00e1y m\u00f3c v\u00e0 l\u1eafp r\u00e1p c\u00f4ng nghi\u1ec7p. Ch\u00fang cung c\u1ea5p \u0111\u1ed9 b\u1ec1n k\u00e9o r\u1ea5t cao trong c\u00e1c m\u1ed1i n\u1ed1i nh\u1ecf g\u1ecdn, nh\u01b0ng ch\u00fang c\u0169ng y\u00eau c\u1ea7u ki\u1ec3m so\u00e1t v\u1eadt li\u1ec7u, x\u1eed l\u00fd nhi\u1ec7t, l\u1ef1a ch\u1ecdn l\u1edbp ph\u1ee7 v\u00e0 k\u1ef7 lu\u1eadt l\u1eafp \u0111\u1eb7t c\u1ea9n th\u1eadn h\u01a1n so v\u1edbi c\u00e1c lo\u1ea1i thu\u1ed9c t\u00ednh th\u1ea5p h\u01a1n.<\/p>\n\n\n\n<p>Theo kinh nghi\u1ec7m c\u1ee7a t\u00f4i, h\u1ea7u h\u1ebft c\u00e1c v\u1ea5n \u0111\u1ec1 v\u1edbi bu l\u00f4ng kh\u00f4ng \u0111\u1ebfn t\u1eeb b\u1ea3n th\u00e2n c\u1ea5p \u0111\u1ed9. Ch\u00fang xu\u1ea5t ph\u00e1t t\u1eeb vi\u1ec7c s\u1eed d\u1ee5ng c\u1ea5p \u0111\u1ed9 ph\u1ee7 kh\u00f4ng \u0111\u00fang kh\u1edbp n\u1ed1i, ph\u1ee7 sai l\u1edbp ph\u1ee7, si\u1ebft qu\u00e1 ch\u1eb7t trong khi l\u1eafp \u0111\u1eb7t ho\u1eb7c coi \u201c12.9\u201d nh\u01b0 m\u1ed9t th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt ho\u00e0n ch\u1ec9nh. Kh\u00f4ng ph\u1ea3i v\u1eady. N\u00f3 ch\u1ec9 l\u00e0 m\u1ed9t ph\u1ea7n c\u1ee7a y\u00eau c\u1ea7u chi ti\u1ebft si\u1ebft ch\u1eb7t.<\/p>\n\n\n\n<p>\u0110\u1ed1i v\u1edbi c\u00e1c lo\u1ea1i s\u1ea3n ph\u1ea9m c\u00f3 \u0111\u1ed9 b\u1ec1n cao, ng\u01b0\u1eddi mua c\u00f3 th\u1ec3 xem x\u00e9t XZ Fastener's <a href=\"https:\/\/xzfastener.com\/vi\/products-category\/high-strength-fasteners\/\">\u1ed1c v\u00edt c\u01b0\u1eddng \u0111\u1ed9 cao<\/a> v\u00e0 <a href=\"https:\/\/xzfastener.com\/vi\/products-category\/standard-fasteners\/\">\u1ed1c v\u00edt ti\u00eau chu\u1ea9n<\/a> trang.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">12.9 L\u1edbp ngh\u0129a l\u00e0 g\u00ec?<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">\u0110\u1ed9 b\u1ec1n k\u00e9o cao v\u1edbi quy tr\u00ecnh ki\u1ec3m so\u00e1t nghi\u00eam ng\u1eb7t<\/h3>\n\n\n\n<p>Lo\u1ea1i thu\u1ed9c t\u00ednh bu l\u00f4ng h\u1ec7 m\u00e9t cho th\u1ea5y chi ti\u1ebft si\u1ebft ch\u1eb7t c\u00f3 \u0111\u1ed9 b\u1ec1n cao v\u1edbi kh\u1ea3 n\u0103ng ch\u1ecbu k\u00e9o v\u00e0 n\u0103ng su\u1ea5t r\u1ea5t cao. Nh\u1eefng bu l\u00f4ng n\u00e0y th\u01b0\u1eddng \u0111\u01b0\u1ee3c l\u00e0m t\u1eeb th\u00e9p h\u1ee3p kim v\u00e0 \u0111\u01b0\u1ee3c x\u1eed l\u00fd nhi\u1ec7t b\u1eb1ng c\u00e1ch l\u00e0m ngu\u1ed9i v\u00e0 t\u00f4i luy\u1ec7n \u0111\u1ec3 \u0111\u1ea1t \u0111\u01b0\u1ee3c c\u00e1c t\u00ednh ch\u1ea5t c\u01a1 h\u1ecdc c\u1ea7n thi\u1ebft. (12.9)<\/p>\n\n\n\n<p>Ch\u00fang \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng r\u1ed9ng r\u00e3i khi c\u1ea7n l\u1ef1c k\u1eb9p cao trong m\u1ed9t kh\u00f4ng gian h\u1ea1n ch\u1ebf.<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>M\u1ee5c<\/th><th>12.9 \u00dd ngh\u0129a l\u1edbp Bolt<\/th><\/tr><\/thead><tbody><tr><td>H\u1ec7 th\u1ed1ng chi ti\u1ebft si\u1ebft ch\u1eb7t<\/td><td>L\u1edbp thu\u1ed9c t\u00ednh s\u1ed1 li\u1ec7u<\/td><\/tr><tr><td>H\u01b0\u1edbng v\u1eadt li\u1ec7u \u0111i\u1ec3n h\u00ecnh<\/td><td>Th\u00e9p h\u1ee3p kim<\/td><\/tr><tr><td>Quy tr\u00ecnh<\/td><td>\u0110\u01b0\u1ee3c x\u1eed l\u00fd nhi\u1ec7t, th\u01b0\u1eddng \u0111\u01b0\u1ee3c l\u00e0m ngu\u1ed9i v\u00e0 t\u00f4i luy\u1ec7n<\/td><\/tr><tr><td>\u01afu \u0111i\u1ec3m ch\u00ednh<\/td><td>\u0110\u1ed9 b\u1ec1n cao \u1edf c\u00e1c kh\u1edbp nh\u1ecf g\u1ecdn<\/td><\/tr><tr><td>S\u1ea3n ph\u1ea9m th\u00f4ng d\u1ee5ng<\/td><td>V\u00edt \u0111\u1ea7u \u1ed5 c\u1eafm, bu l\u00f4ng l\u1ee5c gi\u00e1c, v\u00edt \u0111\u1ecbnh v\u1ecb, bu l\u00f4ng m\u00e1y<\/td><\/tr><tr><td>M\u1ed1i quan t\u00e2m ch\u00ednh<\/td><td>\u0110\u1ed9 gi\u00f2n, \u0111\u1ed9 gi\u00f2n, r\u1ee7i ro v\u1ec1 l\u1edbp ph\u1ee7, \u0111\u1ed9 nh\u1ea1y khi l\u1eafp \u0111\u1eb7t<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p>Kh\u00f4ng n\u00ean ch\u1ecdn m\u1ed9t bu l\u00f4ng ch\u1ec9 v\u00ec n\u00f3 \u201cm\u1ea1nh h\u01a1n\u201d. N\u00f3 n\u00ean \u0111\u01b0\u1ee3c ch\u1ecdn v\u00ec kh\u1edbp th\u1ef1c s\u1ef1 c\u1ea7n s\u1ee9c m\u1ea1nh \u0111\u00f3 v\u00e0 c\u00f3 th\u1ec3 h\u1ed7 tr\u1ee3 n\u00f3. (12.9)<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">V\u1eadt li\u1ec7u ph\u1ed5 bi\u1ebfn \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng cho 12.9 Bu l\u00f4ng<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">Th\u00e9p h\u1ee3p kim l\u00e0 s\u1ef1 l\u1ef1a ch\u1ecdn th\u00f4ng th\u01b0\u1eddng<\/h3>\n\n\n\n<p>C\u00e1c lo\u1ea1i bu l\u00f4ng th\u01b0\u1eddng \u0111\u01b0\u1ee3c l\u00e0m t\u1eeb th\u00e9p h\u1ee3p kim c\u00f3 \u0111\u1ed9 c\u1ee9ng t\u1ed1t. T\u00ean nguy\u00ean li\u1ec7u kh\u00e1c nhau t\u00f9y theo qu\u1ed1c gia v\u00e0 ngu\u1ed3n nh\u00e0 m\u00e1y, nh\u01b0ng \u0111i\u1ec3m quan tr\u1ecdng kh\u00f4ng ch\u1ec9 l\u00e0 t\u00ean th\u01b0\u01a1ng m\u1ea1i. V\u1eadt li\u1ec7u ph\u1ea3i h\u1ed7 tr\u1ee3 x\u1eed l\u00fd nhi\u1ec7t c\u1ea7n thi\u1ebft, ph\u1ea1m vi \u0111\u1ed9 c\u1ee9ng, \u0111\u1ed9 b\u1ec1n v\u00e0 \u0111\u1ed9 \u1ed5n \u0111\u1ecbnh k\u00edch th\u01b0\u1edbc. (12.9)<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>H\u01b0\u1edbng v\u1eadt ch\u1ea5t<\/th><th>T\u1ea1i sao n\u00f3 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng<\/th><th>S\u00e9c c\u1ee7a ng\u01b0\u1eddi mua<\/th><\/tr><\/thead><tbody><tr><td>Th\u00e9p h\u1ee3p kim cacbon trung b\u00ecnh<\/td><td>H\u1ed7 tr\u1ee3 c\u01b0\u1eddng \u0111\u1ed9 cao sau khi x\u1eed l\u00fd nhi\u1ec7t<\/td><td>X\u00e1c nh\u1eadn h\u00f3a h\u1ecdc v\u00e0 x\u1eed l\u00fd nhi\u1ec7t<\/td><\/tr><tr><td>Th\u00e9p h\u1ee3p kim crom-molypden<\/td><td>\u0110\u1ed9 c\u1ee9ng t\u1ed1t v\u00e0 \u0111\u00e1p \u1ee9ng s\u1ee9c m\u1ea1nh<\/td><td>Y\u00eau c\u1ea7u ch\u1ee9ng ch\u1ec9 v\u1eadt li\u1ec7u n\u1ebfu quan tr\u1ecdng<\/td><\/tr><tr><td>Th\u00e9p h\u1ee3p kim theo b\u1ea3n v\u1ebd<\/td><td>D\u00f9ng cho OEM ho\u1eb7c c\u00e1c b\u1ed9 ph\u1eadn m\u00e1y m\u00f3c \u0111\u1eb7c bi\u1ec7t<\/td><td>Th\u1ef1c hi\u1ec7n theo b\u1ea3n v\u1ebd ch\u00ednh x\u00e1c<\/td><\/tr><tr><td>V\u1eadt li\u1ec7u thay th\u1ebf<\/td><td>\u0110\u00f4i khi \u0111\u01b0\u1ee3c \u0111\u1ec1 xu\u1ea5t v\u1ec1 chi ph\u00ed ho\u1eb7c t\u00ednh s\u1eb5n c\u00f3<\/td><td>Y\u00eau c\u1ea7u ph\u00ea duy\u1ec7t tr\u01b0\u1edbc khi s\u1ea3n xu\u1ea5t<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p>\u0110\u1ec3 so s\u00e1nh v\u1eadt li\u1ec7u chung, ng\u01b0\u1eddi mua c\u0169ng c\u00f3 th\u1ec3 xem x\u00e9t XZ Fastener's <a href=\"https:\/\/xzfastener.com\/vi\/fastener-material\/carbon-steel\/\">\u1ed1c v\u00edt th\u00e9p carbon<\/a>. \u0110\u1ed1i v\u1edbi c\u00e1c \u1ee9ng d\u1ee5ng ch\u1ed1ng \u0103n m\u00f2n, th\u00e9p kh\u00f4ng g\u1ec9 c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c xem x\u00e9t ri\u00eang bi\u1ec7t, nh\u01b0ng \u1ed1c v\u00edt kh\u00f4ng g\u1ec9 kh\u00f4ng ph\u1ea3i l\u00e0 s\u1ef1 thay th\u1ebf tr\u1ef1c ti\u1ebfp cho bu l\u00f4ng th\u00e9p h\u1ee3p kim. (12.9)<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">L\u1ee3i \u00edch c\u1ee7a Bu l\u00f4ng c\u1ea5p 12.9<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">N\u01a1i h\u1ecd th\u1ef1c hi\u1ec7n t\u1ed1t<\/h3>\n\n\n\n<p>12.9 bu l\u00f4ng r\u1ea5t h\u1eefu \u00edch khi m\u1ed1i n\u1ed1i c\u1ea7n t\u1ea3i tr\u01b0\u1edbc cao, thi\u1ebft k\u1ebf nh\u1ecf g\u1ecdn v\u00e0 hi\u1ec7u su\u1ea5t c\u01a1 h\u1ecdc m\u1ea1nh m\u1ebd. Ch\u00fang ph\u1ed5 bi\u1ebfn trong khu\u00f4n m\u1eabu, m\u00e1y c\u00f4ng c\u1ee5, thi\u1ebft b\u1ecb n\u1eb7ng, h\u1ec7 th\u1ed1ng th\u1ee7y l\u1ef1c, \u0111\u1ed3 g\u00e1 ch\u00ednh x\u00e1c, khu\u00f4n d\u1eadp v\u00e0 gi\u00e1 \u0111\u1ee1 ch\u1ecbu t\u1ea3i cao.<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>l\u1ee3i \u00edch<\/th><th>Gi\u00e1 tr\u1ecb th\u1ef1c t\u1ebf<\/th><\/tr><\/thead><tbody><tr><td>\u0110\u1ed9 b\u1ec1n k\u00e9o cao<\/td><td>Cho ph\u00e9p k\u1eb9p m\u1ea1nh trong kh\u00f4ng gian h\u1ea1n ch\u1ebf<\/td><\/tr><tr><td>S\u1ee9c m\u1ea1nh n\u0103ng su\u1ea5t cao<\/td><td>Ch\u1ed1ng l\u1ea1i s\u1ef1 k\u00e9o d\u00e0i v\u0129nh vi\u1ec5n d\u01b0\u1edbi t\u1ea3i<\/td><\/tr><tr><td>Thi\u1ebft k\u1ebf kh\u1edbp nh\u1ecf g\u1ecdn<\/td><td>H\u1eefu \u00edch khi bu l\u00f4ng l\u1edbn h\u01a1n kh\u00f4ng th\u1ec3 l\u1eafp v\u1eeba<\/td><\/tr><tr><td>T\u1ed1t cho m\u00e1y m\u00f3c<\/td><td>Th\u00edch h\u1ee3p cho c\u00e1c c\u1ee5m l\u1eafp r\u00e1p c\u00f3 t\u1ea3i tr\u1ecdng cao \u0111\u01b0\u1ee3c ki\u1ec3m so\u00e1t<\/td><\/tr><tr><td>\u1ed4n \u0111\u1ecbnh d\u01b0\u1edbi m\u00f4-men xo\u1eafn th\u00edch h\u1ee3p<\/td><td>Ho\u1ea1t \u0111\u1ed9ng t\u1ed1t khi t\u1ea3i tr\u01b0\u1edbc \u0111\u01b0\u1ee3c ki\u1ec3m so\u00e1t<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p>\u1ede kh\u1edbp b\u00ean ph\u1ea3i, m\u1ed9t 12.9 bu l\u00f4ng mang l\u1ea1i hi\u1ec7u qu\u1ea3 tuy\u1ec7t v\u1eddi. Kh\u1edbp sai c\u00f3 th\u1ec3 t\u1ea1o ra nguy c\u01a1 h\u1ecfng h\u00f3c m\u1edbi.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Nh\u1eefng r\u1ee7i ro ch\u00ednh m\u00e0 ng\u01b0\u1eddi mua ph\u1ea3i hi\u1ec3u<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">S\u1ee9c m\u1ea1nh cao h\u01a1n mang l\u1ea1i kh\u1ea3 n\u0103ng ch\u1ecbu \u0111\u1ef1ng sai l\u1ea7m th\u1ea5p h\u01a1n<\/h3>\n\n\n\n<p>C\u1ea5p \u0111\u1ed9 b\u1ec1n c\u00e0ng cao th\u00ec chi ti\u1ebft si\u1ebft ch\u1eb7t c\u00e0ng \u00edt tha th\u1ee9. Bu l\u00f4ng 12.9 nh\u1ea1y c\u1ea3m h\u01a1n v\u1edbi vi\u1ec7c l\u1eafp \u0111\u1eb7t k\u00e9m, l\u1edbp ph\u1ee7 sai, h\u01b0 ren v\u00e0 x\u1eed l\u00fd nhi\u1ec7t kh\u00f4ng ki\u1ec3m so\u00e1t \u0111\u01b0\u1ee3c so v\u1edbi bu l\u00f4ng c\u1ea5p th\u1ea5p h\u01a1n.<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>R\u1ee7i ro<\/th><th>\u0110i\u1ec1u g\u00ec c\u00f3 th\u1ec3 x\u1ea3y ra<\/th><th>Prevention<\/th><\/tr><\/thead><tbody><tr><td>Over-tightening<\/td><td>Bu l\u00f4ng b\u1ecb ch\u00f9ng ho\u1eb7c t\u01b0\u1edbc ren<\/td><td>S\u1eed d\u1ee5ng ph\u01b0\u01a1ng ph\u00e1p m\u00f4-men xo\u1eafn ho\u1eb7c t\u1ea3i tr\u01b0\u1edbc \u0111\u01b0\u1ee3c ki\u1ec3m so\u00e1t<\/td><\/tr><tr><td>\u0110\u1ed9 gi\u00f2n hydro<\/td><td>Ch\u1eadm n\u1ee9t sau khi m\u1ea1<\/td><td>Tr\u00e1nh m\u1ea1 r\u1ee7i ro ho\u1eb7c y\u00eau c\u1ea7u ki\u1ec3m so\u00e1t quy tr\u00ecnh th\u00edch h\u1ee3p<\/td><\/tr><tr><td>X\u1eed l\u00fd nhi\u1ec7t k\u00e9m<\/td><td>G\u00e3y gi\u00f2n ho\u1eb7c c\u01b0\u1eddng \u0111\u1ed9 th\u1ea5p<\/td><td>Y\u00eau c\u1ea7u \u0111\u1ed9 c\u1ee9ng v\u00e0 ki\u1ec3m tra c\u01a1 h\u1ecdc<\/td><\/tr><tr><td>Decarburization<\/td><td>B\u1ec1 m\u1eb7t ren y\u1ebfu<\/td><td>Ch\u1ec9 \u0111\u1ecbnh ki\u1ec3m tra khi c\u1ea7n thi\u1ebft<\/td><\/tr><tr><td>\u0110ai \u1ed1c giao ph\u1ed1i sai<\/td><td>L\u1ed7i ren \u0111ai \u1ed1c<\/td><td>Ph\u00f9 h\u1ee3p v\u1edbi c\u1ea5p \u0111\u1ed9 \u0111ai \u1ed1c v\u00e0 \u0111\u1ed9 \u0103n kh\u1edbp ren<\/td><\/tr><tr><td>Ch\u1ea5t li\u1ec7u kh\u1edbp m\u1ec1m<\/td><td>T\u01b0\u1edbc l\u1ed7 c\u00f3 ren<\/td><td>S\u1eed d\u1ee5ng mi\u1ebfng \u0111\u1ec7m, v\u00f2ng \u0111\u1ec7m ho\u1eb7c l\u1edbp th\u1ea5p h\u01a1n khi th\u00edch h\u1ee3p<\/td><\/tr><tr><td>Corrosion<\/td><td>Nguy c\u01a1 m\u1ea5t s\u1ee9c m\u1ea1nh ho\u1eb7c n\u1ee9t<\/td><td>Ch\u1ecdn h\u1ec7 th\u1ed1ng s\u01a1n ho\u1eb7c v\u1eadt li\u1ec7u ph\u00f9 h\u1ee3p<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p>M\u1ed9t l\u1ed7i ph\u1ed5 bi\u1ebfn l\u00e0 s\u1eed d\u1ee5ng bu l\u00f4ng trong c\u1ee5m nh\u00f4m m\u1ec1m ho\u1eb7c t\u1ea5m m\u1ecfng m\u00e0 kh\u00f4ng xem x\u00e9t l\u1ea1i \u0111\u1ed9 \u0103n kh\u1edbp c\u1ee7a ren. Bu l\u00f4ng c\u00f3 th\u1ec3 ch\u1eafc ch\u1eafn nh\u01b0ng ph\u1ea7n giao ti\u1ebfp c\u00f3 th\u1ec3 kh\u00f4ng ch\u1eafc ch\u1eafn. (12.9)<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">L\u1ef1a ch\u1ecdn l\u1edbp ph\u1ee7 cho bu l\u00f4ng (12.9)<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">L\u1edbp ph\u1ee7 ph\u1ea3i \u0111\u01b0\u1ee3c l\u1ef1a ch\u1ecdn c\u1ea9n th\u1eadn<\/h3>\n\n\n\n<p>12.9 bu l\u00f4ng th\u01b0\u1eddng c\u1ea7n \u0111\u01b0\u1ee3c b\u1ea3o v\u1ec7 ch\u1ed1ng \u0103n m\u00f2n nh\u01b0ng kh\u00f4ng ph\u1ea3i l\u1edbp ho\u00e0n thi\u1ec7n n\u00e0o c\u0169ng ph\u00f9 h\u1ee3p. C\u00e1c \u1ed1c v\u00edt c\u01b0\u1eddng \u0111\u1ed9 cao m\u1ea1 \u0111i\u1ec7n c\u00f3 th\u1ec3 t\u1ea1o ra nguy c\u01a1 gi\u00f2n do hydro n\u1ebfu qu\u00e1 tr\u00ecnh n\u00e0y kh\u00f4ng \u0111\u01b0\u1ee3c ki\u1ec3m so\u00e1t ch\u1eb7t ch\u1ebd. \u0110\u00e2y l\u00e0 m\u1ed9t l\u00fd do khi\u1ebfn nhi\u1ec1u ng\u01b0\u1eddi mua c\u00e2n nh\u1eafc c\u00e1c l\u1ef1a ch\u1ecdn thay th\u1ebf nh\u01b0 oxit \u0111en v\u1edbi d\u1ea7u, v\u1ea3y k\u1ebdm, ph\u1ed1t ph\u00e1t ho\u1eb7c c\u00e1c l\u1edbp ph\u1ee7 \u0111\u01b0\u1ee3c ph\u00ea duy\u1ec7t kh\u00e1c.<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>T\u00f9y ch\u1ecdn k\u1ebft th\u00fac<\/th><th>Tr\u01b0\u1eddng h\u1ee3p s\u1eed d\u1ee5ng<\/th><th>S\u1ef1 th\u1eadn tr\u1ecdng c\u1ee7a ng\u01b0\u1eddi mua<\/th><\/tr><\/thead><tbody><tr><td>Oxit \u0111en<\/td><td>M\u00e1y m\u00f3c v\u00e0 d\u1ee5ng c\u1ee5 trong nh\u00e0<\/td><td>B\u1ea3o v\u1ec7 ch\u1ed1ng \u0103n m\u00f2n h\u1ea1n ch\u1ebf<\/td><\/tr><tr><td>Phosphate<\/td><td>C\u00e1c b\u1ed9 ph\u1eadn \u0111\u01b0\u1ee3c b\u00f4i tr\u01a1n ho\u1eb7c x\u1eed l\u00fd<\/td><td>C\u1ea7n d\u1ea7u ho\u1eb7c ch\u1ea5t b\u1ecbt k\u00edn th\u00edch h\u1ee3p<\/td><\/tr><tr><td>M\u1ea1 k\u1ebdm<\/td><td>B\u1ea3o v\u1ec7 ch\u1ed1ng \u0103n m\u00f2n chung<\/td><td>Ki\u1ec3m so\u00e1t \u0111\u1ed9 gi\u00f2n hydro l\u00e0 r\u1ea5t quan tr\u1ecdng<\/td><\/tr><tr><td>v\u1ea3y k\u1ebdm<\/td><td>Kh\u1ea3 n\u0103ng ch\u1ed1ng \u0103n m\u00f2n cao h\u01a1n<\/td><td>X\u00e1c nh\u1eadn th\u00f4ng s\u1ed1 ma s\u00e1t v\u00e0 l\u1edbp ph\u1ee7<\/td><\/tr><tr><td>PTFE l\u1edbp ph\u1ee7<\/td><td>Ma s\u00e1t th\u1ea5p ho\u1eb7c d\u1ecbch v\u1ee5 \u0111\u1eb7c bi\u1ec7t<\/td><td>Gi\u00e1 tr\u1ecb m\u00f4-men xo\u1eafn ph\u1ea3i \u0111\u01b0\u1ee3c xem x\u00e9t l\u1ea1i<\/td><\/tr><tr><td>\u0110\u1ed3ng b\u1eb1ng\/c\u00f3 d\u1ea7u<\/td><td>S\u1eed d\u1ee5ng trong nh\u00e0 c\u00f3 ki\u1ec3m so\u00e1t<\/td><td>Kh\u00f4ng d\u00e0nh cho m\u00f4i tr\u01b0\u1eddng \u0103n m\u00f2n<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p>\u0110\u1ec3 bi\u1ebft c\u00e1c t\u00f9y ch\u1ecdn ho\u00e0n thi\u1ec7n, h\u00e3y xem XZ Fastener <a href=\"https:\/\/xzfastener.com\/vi\/products-category\/various-coated-fasteners\/\">\u1ed1c v\u00edt tr\u00e1ng kh\u00e1c nhau<\/a> v\u00e0 <a href=\"https:\/\/xzfastener.com\/vi\/fastener-coating\/teflon-coating\/\">PTFE l\u1edbp ph\u1ee7<\/a>.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Quy t\u1eafc l\u1eafp \u0111\u1eb7t cho 12.9 Bu l\u00f4ng<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">Ki\u1ec3m so\u00e1t m\u00f4-men xo\u1eafn, ren v\u00e0 c\u00e1c b\u1ed9 ph\u1eadn giao ph\u1ed1i<\/h3>\n\n\n\n<p>12.9 bu l\u00f4ng n\u00ean \u0111\u01b0\u1ee3c l\u1eafp \u0111\u1eb7t c\u00f3 k\u1ef7 lu\u1eadt h\u01a1n so v\u1edbi c\u00e1c bu l\u00f4ng th\u00f4ng d\u1ee5ng.<\/p>\n\n\n\n<p>C\u00e1c ph\u01b0\u01a1ng ph\u00e1p hay nh\u1ea5t bao g\u1ed3m:<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>X\u00e1c nh\u1eadn m\u00f4-men xo\u1eafn ch\u00ednh x\u00e1c cho t\u00ecnh tr\u1ea1ng l\u1edbp ph\u1ee7 v\u00e0 b\u00f4i tr\u01a1n th\u1ef1c t\u1ebf.<\/li>\n\n\n\n<li>Tr\u00e1nh si\u1ebft ch\u1eb7t t\u00e1c \u0111\u1ed9ng kh\u00f4ng ki\u1ec3m so\u00e1t \u0111\u01b0\u1ee3c.<\/li>\n\n\n\n<li>S\u1eed d\u1ee5ng \u0111ai \u1ed1c v\u00e0 v\u00f2ng \u0111\u1ec7m c\u1ee9ng ph\u00f9 h\u1ee3p khi c\u1ea7n thi\u1ebft.<\/li>\n\n\n\n<li>Ki\u1ec3m tra s\u1ef1 g\u1eafn k\u1ebft c\u1ee7a ren trong c\u00e1c l\u1ed7 \u0111\u00e3 khai th\u00e1c.<\/li>\n\n\n\n<li>Tr\u00e1nh s\u1eed d\u1ee5ng l\u1ea1i bu l\u00f4ng \u1edf c\u00e1c kh\u1edbp quan tr\u1ecdng tr\u1eeb khi \u0111\u01b0\u1ee3c ph\u00ea duy\u1ec7t.<\/li>\n\n\n\n<li>Ki\u1ec3m tra ch\u1ee7 \u0111\u1ec1 tr\u01b0\u1edbc khi c\u00e0i \u0111\u1eb7t.<\/li>\n\n\n\n<li>\u0110\u1eebng thay th\u1ebf 12.9 cho 8.8 ho\u1eb7c 10.9 m\u00e0 kh\u00f4ng xem x\u00e9t k\u1ef9 thu\u1eadt.<\/li>\n\n\n\n<li>S\u1eed d\u1ee5ng ch\u1ea5t ch\u1ed1ng \u0103n m\u00f2n ho\u1eb7c b\u00f4i tr\u01a1n \u1edf nh\u1eefng n\u01a1i \u1ee9ng d\u1ee5ng y\u00eau c\u1ea7u.<\/li>\n<\/ol>\n\n\n\n<p>\u0110\u1ec3 l\u1ef1a ch\u1ecdn v\u00f2ng \u0111\u1ec7m, ng\u01b0\u1eddi mua c\u00f3 th\u1ec3 xem x\u00e9t XZ Fastener's <a href=\"https:\/\/xzfastener.com\/vi\/fastener-type\/washers\/\">v\u00f2ng \u0111\u1ec7m<\/a> trang.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">RFQ Danh s\u00e1ch ki\u1ec3m tra d\u00e0nh cho ng\u01b0\u1eddi mua<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">Nh\u1eefng g\u00ec c\u1ea7n ch\u1ec9 \u0111\u1ecbnh tr\u01b0\u1edbc khi \u0111\u1eb7t h\u00e0ng<\/h3>\n\n\n\n<p>M\u1ed9t RFQ \u0111\u00e1ng tin c\u1eady cho c\u00e1c lo\u1ea1i bu l\u00f4ng lo\u1ea1i 12.9 n\u00ean bao g\u1ed3m:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Lo\u1ea1i chi ti\u1ebft si\u1ebft ch\u1eb7t v\u00e0 ti\u00eau chu\u1ea9n.<\/li>\n\n\n\n<li>K\u00edch th\u01b0\u1edbc, cao \u0111\u1ed9, chi\u1ec1u d\u00e0i v\u00e0 chi\u1ec1u d\u00e0i ren.<\/li>\n\n\n\n<li>L\u1edbp thu\u1ed9c t\u00ednh: 12.9.<\/li>\n\n\n\n<li>Y\u00eau c\u1ea7u v\u1ec1 v\u1eadt li\u1ec7u ho\u1eb7c h\u1ee3p kim n\u1ebfu \u0111\u01b0\u1ee3c ch\u1ec9 \u0111\u1ecbnh.<\/li>\n\n\n\n<li>Y\u00eau c\u1ea7u x\u1eed l\u00fd nhi\u1ec7t v\u00e0 \u0111\u1ed9 c\u1ee9ng.<\/li>\n\n\n\n<li>Y\u00eau c\u1ea7u v\u1ec1 \u0111\u1ed9 ho\u00e0n thi\u1ec7n b\u1ec1 m\u1eb7t v\u00e0 ki\u1ec3m so\u00e1t \u0111\u1ed9 gi\u00f2n do hydro.<\/li>\n\n\n\n<li>Y\u00eau c\u1ea7u v\u1ec1 \u0111ai \u1ed1c v\u00e0 v\u00f2ng \u0111\u1ec7m.<\/li>\n\n\n\n<li>Y\u00eau c\u1ea7u v\u1ec1 m\u00f4-men xo\u1eafn, b\u00f4i tr\u01a1n ho\u1eb7c t\u1ea3i tr\u01b0\u1edbc.<\/li>\n\n\n\n<li>C\u00e1c y\u00eau c\u1ea7u v\u1ec1 ch\u1ee9ng ch\u1ec9, ch\u1eb3ng h\u1ea1n nh\u01b0 MTC ho\u1eb7c b\u00e1o c\u00e1o ki\u1ec3m tra.<\/li>\n\n\n\n<li>Chi ti\u1ebft \u1ee9ng d\u1ee5ng, bao g\u1ed3m t\u1ea3i, \u0111\u1ed9 rung, nhi\u1ec7t \u0111\u1ed9 v\u00e0 m\u00f4i tr\u01b0\u1eddng.<\/li>\n<\/ul>\n\n\n\n<p>\u0110\u1ed1i v\u1edbi c\u00e1c bu l\u00f4ng ho\u1eb7c \u1ed1c v\u00edt d\u00e0nh ri\u00eang cho m\u00e1y m\u00f3c t\u00f9y ch\u1ec9nh, h\u00e3y g\u1eedi b\u1ea3n v\u1ebd v\u00e0 chi ti\u1ebft k\u1ef9 thu\u1eadt qua (12.9) <a href=\"https:\/\/xzfastener.com\/vi\/home\/contact-us\/\">XZ Fastener Li\u00ean h\u1ec7 v\u1edbi ch\u00fang t\u00f4i<\/a>.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Khuy\u1ebfn ngh\u1ecb cu\u1ed1i c\u00f9ng<\/h2>\n\n\n\n<p>Bu l\u00f4ng lo\u1ea1i 12.9 l\u00e0 lo\u1ea1i \u1ed1c v\u00edt c\u00f3 \u0111\u1ed9 b\u1ec1n cao tuy\u1ec7t v\u1eddi khi \u1ee9ng d\u1ee5ng th\u1ef1c s\u1ef1 c\u1ea7n t\u1ea3i tr\u01b0\u1edbc cao v\u00e0 thi\u1ebft k\u1ebf m\u1ed1i n\u1ed1i nh\u1ecf g\u1ecdn. Ch\u00fang kh\u00f4ng ph\u1ea3i l\u00e0 m\u1ed9t b\u1ea3n n\u00e2ng c\u1ea5p chung cho m\u1ecdi t\u1ed5 h\u1ee3p.<\/p>\n\n\n\n<p>Tr\u01b0\u1edbc khi mua, h\u00e3y x\u00e1c nh\u1eadn v\u1eadt li\u1ec7u, x\u1eed l\u00fd nhi\u1ec7t, l\u1edbp ph\u1ee7, c\u00e1c b\u1ed9 ph\u1eadn k\u1ebft n\u1ed1i, ph\u01b0\u01a1ng ph\u00e1p m\u00f4-men xo\u1eafn v\u00e0 m\u00f4i tr\u01b0\u1eddng s\u1eed d\u1ee5ng. M\u1ed9t bu l\u00f4ng \u0111\u01b0\u1ee3c x\u00e1c \u0111\u1ecbnh r\u00f5 r\u00e0ng c\u00f3 th\u1ec3 c\u1ea3i thi\u1ec7n \u0111\u1ed9 tin c\u1eady c\u1ee7a m\u00e1y m\u00f3c. M\u1ed9t lo\u1ea1i \u0111\u01b0\u1ee3c ch\u1ec9 \u0111\u1ecbnh k\u00e9m c\u00f3 th\u1ec3 g\u00e2y ra l\u1ed7i ren, g\u00e3y gi\u00f2n, c\u00e1c v\u1ea5n \u0111\u1ec1 v\u1ec1 l\u1edbp ph\u1ee7 ho\u1eb7c n\u1ee9t ch\u1eadm sau khi l\u1eafp \u0111\u1eb7t. (12.9)<\/p>","protected":false},"excerpt":{"rendered":"<p>12.9 grade bolts are among the highest-strength metric fasteners commonly used in machinery and industrial assemblies. They offer very high tensile strength in compact joints, but they also require more careful material control, heat treatment, coating selection, and installation discipline than lower property classes. In my experience, most problems with 12.9 bolts do not come [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[479],"tags":[487],"class_list":["post-7339","post","type-post","status-publish","format-standard","hentry","category-fastener-knowledge-library","tag-fastener-materials"],"acf":[],"_links":{"self":[{"href":"https:\/\/xzfastener.com\/vi\/wp-json\/wp\/v2\/posts\/7339","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=7339"}],"version-history":[{"count":1,"href":"https:\/\/xzfastener.com\/vi\/wp-json\/wp\/v2\/posts\/7339\/revisions"}],"predecessor-version":[{"id":7340,"href":"https:\/\/xzfastener.com\/vi\/wp-json\/wp\/v2\/posts\/7339\/revisions\/7340"}],"wp:attachment":[{"href":"https:\/\/xzfastener.com\/vi\/wp-json\/wp\/v2\/media?parent=7339"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/xzfastener.com\/vi\/wp-json\/wp\/v2\/categories?post=7339"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/xzfastener.com\/vi\/wp-json\/wp\/v2\/tags?post=7339"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}