{"id":1692,"date":"2026-02-19T00:36:50","date_gmt":"2026-02-18T17:36:50","guid":{"rendered":"https:\/\/inoxcuongthinh.com\/bulong-oc-vit-ecu-inox-cach-chon-mac-thep-theo-moi-truong\/"},"modified":"2026-02-19T00:36:50","modified_gmt":"2026-02-18T17:36:50","slug":"bulong-oc-vit-ecu-inox-cach-chon-mac-thep-theo-moi-truong","status":"publish","type":"post","link":"https:\/\/inoxcuongthinh.com\/bulong-oc-vit-ecu-inox-cach-chon-mac-thep-theo-moi-truong\/","title":{"rendered":"Bulong, \u1ed1c v\u00edt, ecu Inox: C\u00e1ch ch\u1ecdn m\u00e1c th\u00e9p theo m\u00f4i tr\u01b0\u1eddng"},"content":{"rendered":"<div class=\"custom-toc\">\n<h3>N\u1ed9i dung ch\u00ednh<\/h3>\n<ul>\n<li><a href=\"#toc-0-tong-quan-nhanh-bulong-oc-vit-ecu-inox-gom-nhung-g\">T\u1ed5ng quan nhanh: Bulong, \u1ed1c v\u00edt, ecu Inox g\u1ed3m nh\u1eefng g\u00ec?<\/a><\/li>\n<li><a href=\"#toc-1-phan-loai-theo-mac-thep-va-tinh-nang-khang-an-mon\">Ph\u00e2n lo\u1ea1i theo m\u00e1c th\u00e9p v\u00e0 t\u00ednh n\u0103ng kh\u00e1ng \u0103n m\u00f2n<\/a><\/li>\n<li><a href=\"#toc-2-phan-loai-theo-tieu-chuan-hinh-dang-lap-ghep\">Ph\u00e2n lo\u1ea1i theo ti\u00eau chu\u1ea9n h\u00ecnh d\u1ea1ng, l\u1eafp gh\u00e9p<\/a><\/li>\n<li><a href=\"#toc-3-cach-chon-theo-moi-truong-su-dung-khuyen-nghi-thuc\">C\u00e1ch ch\u1ecdn theo m\u00f4i tr\u01b0\u1eddng s\u1eed d\u1ee5ng (khuy\u1ebfn ngh\u1ecb th\u1ef1c t\u1ebf)<\/a><\/li>\n<li><a href=\"#toc-4-quy-trinh-chon-nhanh-5-buoc\">Quy tr\u00ecnh ch\u1ecdn nhanh 5 b\u01b0\u1edbc<\/a><\/li>\n<li><a href=\"#toc-5-ky-thuat-lap-dat-mo-men-siet-chong-ket-ren-hoan-th\">K\u1ef9 thu\u1eadt l\u1eafp \u0111\u1eb7t: m\u00f4-men si\u1ebft, ch\u1ed1ng k\u1eb9t ren, ho\u00e0n thi\u1ec7n<\/a><\/li>\n<li><a href=\"#toc-6-loi-thuong-gap-va-cach-tranh\">L\u1ed7i th\u01b0\u1eddng g\u1eb7p v\u00e0 c\u00e1ch tr\u00e1nh<\/a><\/li>\n<li><a href=\"#toc-7-goi-y-chon-nhanh-theo-moi-truong-tom-tat\">G\u1ee3i \u00fd ch\u1ecdn nhanh theo m\u00f4i tr\u01b0\u1eddng (t\u00f3m t\u1eaft)<\/a><\/li>\n<li><a href=\"#toc-8-ban-nen-mua-loai-nao-tai-viet-nam\">B\u1ea1n n\u00ean mua lo\u1ea1i n\u00e0o t\u1ea1i Vi\u1ec7t Nam?<\/a><\/li>\n<li><a href=\"#toc-9-nguon-tham-khao-chinh\">Ngu\u1ed3n tham kh\u1ea3o ch\u00ednh<\/a><\/li>\n<li><a href=\"#toc-10-ket-luan\">K\u1ebft lu\u1eadn<\/a><\/li>\n<\/ul>\n<\/div>\n<p>Ph\u1ee5 ki\u1ec7n Inox l\u00e0 m\u1eaft x\u00edch quy\u1ebft \u0111\u1ecbnh \u0111\u1ed9 b\u1ec1n m\u1ed1i gh\u00e9p trong x\u00e2y d\u1ef1ng v\u00e0 n\u1ed9i th\u1ea5t. Trong \u0111\u00f3, bulong, \u1ed1c v\u00edt, ecu (\u0111ai \u1ed1c) Inox c\u00f3 v\u00f4 s\u1ed1 m\u00e1c th\u00e9p v\u00e0 ti\u00eau chu\u1ea9n, m\u1ed7i lo\u1ea1i ph\u00f9 h\u1ee3p m\u1ed9t m\u00f4i tr\u01b0\u1eddng kh\u00e1c nhau. B\u00e0i vi\u1ebft n\u00e0y cung c\u1ea5p h\u01b0\u1edbng d\u1eabn ch\u1ecdn nhanh \u2013 ch\u00ednh x\u00e1c theo \u0111i\u1ec1u ki\u1ec7n l\u00e0m vi\u1ec7c th\u1ef1c t\u1ebf t\u1ea1i Vi\u1ec7t Nam.<\/p>\n<h2 id=\"toc-0-tong-quan-nhanh-bulong-oc-vit-ecu-inox-gom-nhung-g\">T\u1ed5ng quan nhanh: Bulong, \u1ed1c v\u00edt, ecu Inox g\u1ed3m nh\u1eefng g\u00ec?<\/h2>\n<p>&#8211; Bulong (bu l\u00f4ng): Th\u00e2n tr\u1ee5 c\u00f3 ren, si\u1ebft c\u00f9ng \u0111ai \u1ed1c. Ph\u1ed5 bi\u1ebfn: l\u1ee5c gi\u00e1c ngo\u00e0i (ISO 4014\/4017 ~ DIN 931\/933), l\u1ee5c gi\u00e1c ch\u00ecm (ISO 4762 ~ DIN 912), \u0111\u1ea7u c\u00f4n ch\u00ecm (ISO 10642 ~ DIN 7991), n\u1edf (anchor) Inox d\u00f9ng b\u00ea t\u00f4ng.<br \/>\n&#8211; \u1ed0c v\u00edt (v\u00edt): T\u1ef1 si\u1ebft v\u00e0o ren s\u1eb5n ho\u1eb7c t\u1ef1 t\u1ea1o ren (self-tapping), nhi\u1ec1u ki\u1ec3u \u0111\u1ea7u: bake, d\u1eb9p, l\u1ee5c gi\u00e1c, Torx; d\u00f9ng t\u00f4n, g\u1ed7, nh\u1ef1a, inox m\u1ecfng.<br \/>\n&#8211; Ecu (\u0111ai \u1ed1c): L\u1ee5c gi\u00e1c (ISO 4032 ~ DIN 934), ch\u1ed1ng tu\u1ed9t DIN 985 (nyloc), b\u00edch (flange) r\u0103ng c\u01b0a, ch\u1ee5p (acorn) cho th\u1ea9m m\u1ef9 v\u00e0 v\u1ec7 sinh.<br \/>\n&#8211; H\u1ec7 ren: Ch\u1ee7 y\u1ebfu h\u1ec7 m\u00e9t ISO, dung sai 6g\/6H (ISO 965-1). Ren th\u00f4 ti\u00eau chu\u1ea9n \u01b0u ti\u00ean cho c\u00f4ng tr\u00ecnh.<\/p>\n<p>\u0110\u1eb7c tr\u01b0ng c\u01a1 t\u00ednh Inox theo ISO 3506-1\/-2 (k\u00fd hi\u1ec7u th\u01b0\u1eddng g\u1eb7p):<br \/>\n&#8211; A2-50\/70\/80 \u2248 nh\u00f3m 304; A4-70\/80 \u2248 nh\u00f3m 316; A1\/A3\/A5 l\u00e0 c\u00e1c bi\u1ebfn th\u1ec3 austenitic kh\u00e1c; C1\/C3\/C4 l\u00e0 martensitic (v\u00ed d\u1ee5 410) [ISO 3506].<br \/>\n&#8211; V\u00ed d\u1ee5: A2-70 c\u00f3 gi\u1edbi h\u1ea1n b\u1ec1n t\u1ed1i thi\u1ec3u 700 MPa, gi\u1edbi h\u1ea1n ch\u1ea3y (proof) ~450 MPa.<\/p>\n<h2 id=\"toc-1-phan-loai-theo-mac-thep-va-tinh-nang-khang-an-mon\">Ph\u00e2n lo\u1ea1i theo m\u00e1c th\u00e9p v\u00e0 t\u00ednh n\u0103ng kh\u00e1ng \u0103n m\u00f2n<\/h2>\n<p>&#8211; Inox 201 (Cr-Mn-Ni th\u1ea5p): Gi\u00e1 t\u1ed1t, ch\u1ed1ng g\u1ec9 k\u00e9m h\u01a1n 304; d\u1ec5 \u1ed1 n\u00e2u ngo\u00e0i tr\u1eddi\/ven bi\u1ec3n ho\u1eb7c g\u1ea7n ngu\u1ed3n Cl-. Ph\u00f9 h\u1ee3p n\u1ed9i th\u1ea5t kh\u00f4, \u00edt \u1ea9m.<br \/>\n&#8211; Inox 304\/304L (EN 1.4301\/1.4307) \u2013 nh\u00f3m A2: C\u00e2n b\u1eb1ng gi\u1eefa gi\u00e1 v\u00e0 \u0111\u1ed9 b\u1ec1n; d\u00f9ng r\u1ed9ng r\u00e3i ngo\u00e0i tr\u1eddi \u0111\u00f4 th\u1ecb, c\u00f4ng nghi\u1ec7p nh\u1eb9, n\u1ed9i th\u1ea5t, th\u1ef1c ph\u1ea9m (y\u00eau c\u1ea7u v\u1ec7 sinh v\u1eeba).<br \/>\n&#8211; Inox 316\/316L (EN 1.4401\/1.4404) \u2013 nh\u00f3m A4: C\u00f3 Mo (~2\u20132.5%), kh\u00e1ng pitting do Cl- v\u01b0\u1ee3t tr\u1ed9i; ph\u00f9 h\u1ee3p ven bi\u1ec3n, h\u1ed3 b\u01a1i, x\u1eed l\u00fd n\u01b0\u1edbc, h\u00f3a ch\u1ea5t nh\u1eb9.<br \/>\n&#8211; Inox 321 (1.4541) \u1ed5n \u0111\u1ecbnh Ti: Ch\u1ecbu nhi\u1ec7t cao h\u01a1n 304, d\u00f9ng \u201chot end\u201d t\u1edbi ~800\u2013870\u00b0C (gi\u00e1n \u0111o\u1ea1n).<br \/>\n&#8211; Inox 410\/420 \u2013 nh\u00f3m C: T\u00f4i ram \u0111\u01b0\u1ee3c, c\u1ee9ng cao, kh\u00e1ng g\u1ec9 th\u1ea5p; h\u1ee3p d\u1ee5ng c\u1ee5, khu\u00f4n, n\u01a1i kh\u00f4 r\u00e1o.<br \/>\n&#8211; Inox 430 (1.4016) ferritic: Kh\u00e1ng g\u1ec9 th\u1ea5p h\u01a1n 304; d\u00f9ng n\u1ed9i th\u1ea5t kh\u00f4, trang tr\u00ed.<br \/>\n&#8211; Duplex 2205 (1.4462) v\u00e0 cao c\u1ea5p 904L: Kh\u00e1ng Cl- r\u1ea5t cao, cho ven bi\u1ec3n kh\u1eafc nghi\u1ec7t, ho\u00e1 ch\u1ea5t m\u1ea1nh.<\/p>\n<p>L\u01b0u \u00fd t\u1eeb th\u1ef1c t\u1ebf th\u1ecb tr\u01b0\u1eddng:<br \/>\n&#8211; \u201cTest nam ch\u00e2m\u201d kh\u00f4ng \u0111\u00e1ng tin \u0111\u1ec3 ph\u00e2n bi\u1ec7t 201\/304\/316; austenitic c\u00f3 th\u1ec3 h\u01a1i nhi\u1ec5m t\u1eeb sau gia c\u00f4ng ngu\u1ed9i. H\u00e3y y\u00eau c\u1ea7u CO-CQ, ki\u1ec3m \u0111\u1ecbnh PMI khi d\u1ef1 \u00e1n y\u00eau c\u1ea7u.<\/p>\n<p>Ngu\u1ed3n: ISO 3506-1\/-2; Nickel Institute; ASSDA; BSSA.<\/p>\n<h2 id=\"toc-2-phan-loai-theo-tieu-chuan-hinh-dang-lap-ghep\">Ph\u00e2n lo\u1ea1i theo ti\u00eau chu\u1ea9n h\u00ecnh d\u1ea1ng, l\u1eafp gh\u00e9p<\/h2>\n<p>&#8211; Bulong:<br \/>\n  &#8211; ISO 4017 (ren su\u1ed1t, l\u1ee5c gi\u00e1c ngo\u00e0i), ISO 4014 (ren l\u1eedng), ISO 4762 (l\u1ee5c gi\u00e1c ch\u00ecm), ISO 10642 (\u0111\u1ea7u c\u00f4n ch\u00ecm), bulong n\u1edf Inox cho b\u00ea t\u00f4ng (ETA).<br \/>\n&#8211; \u0110ai \u1ed1c:<br \/>\n  &#8211; ISO 4032 (\u0111ai \u1ed1c l\u1ee5c gi\u00e1c), DIN 985 (nyloc), DIN 6923 (\u0111ai \u1ed1c b\u00edch), \u0111ai \u1ed1c ch\u1ee5p cho b\u1ec1 m\u1eb7t l\u1ed9 thi\u00ean, v\u1ec7 sinh.<br \/>\n&#8211; V\u00f2ng \u0111\u1ec7m: DIN 125 (ph\u1eb3ng), DIN 127 (v\u00eanh), r\u0103ng c\u01b0a, c\u00e1ch \u0111i\u1ec7n (nylon, PTFE) gi\u1ea3m \u0103n m\u00f2n \u0111i\u1ec7n h\u00f3a.<br \/>\n&#8211; Kh\u00f3a ren\/ch\u1ed1ng l\u1ecfng: Nyloc, long r\u0103ng c\u01b0a, keo kh\u00f3a ren (t\u00f9y nhi\u1ec7t \u0111\u1ed9), \u00eacu hai \u0111ai, \u0111\u1ec7m l\u00f2 xo \u2013 ch\u1ecdn theo rung \u0111\u1ed9ng, nhi\u1ec7t.<\/p>\n<h2 id=\"toc-3-cach-chon-theo-moi-truong-su-dung-khuyen-nghi-thuc\">C\u00e1ch ch\u1ecdn theo m\u00f4i tr\u01b0\u1eddng s\u1eed d\u1ee5ng (khuy\u1ebfn ngh\u1ecb th\u1ef1c t\u1ebf)<\/h2>\n<h3>1) N\u1ed9i th\u1ea5t kh\u00f4, trong nh\u00e0 (v\u0103n ph\u00f2ng, n\u1ed9i th\u1ea5t g\u1ed7\/nh\u00f4m)<\/h3>\n<p>&#8211; \u01afu ti\u00ean: A2-70 (304) cho \u0111\u1ed9 b\u1ec1n l\u00e2u.<br \/>\n&#8211; Ti\u1ebft ki\u1ec7m: 201 d\u00f9ng \u0111\u01b0\u1ee3c n\u1ebfu \u0111\u1ed9 \u1ea9m th\u1ea5p, kh\u00f4ng g\u1ea7n b\u1ebfp\/ho\u00e1 ch\u1ea5t t\u1ea9y r\u1eeda.<br \/>\n&#8211; Th\u1ea9m m\u1ef9\/hygiene: \u0110ai \u1ed1c ch\u1ee5p, b\u1ec1 m\u1eb7t \u0111\u00e1nh b\u00f3ng ho\u1eb7c \u0111i\u1ec7n ho\u00e1 (ASTM A967 passivation, electropolishing).<\/p>\n<h3>2) Ngo\u00e0i tr\u1eddi \u0111\u00f4 th\u1ecb\/n\u00f4ng th\u00f4n (m\u01b0a n\u1eafng, SO2 th\u1ea5p)<\/h3>\n<p>&#8211; Ch\u1ecdn A2-70\/A2-80 (304\/304L). Tr\u00e1nh 201 v\u00ec d\u1ec5 \u1ed1 n\u00e2u sau 6\u201318 th\u00e1ng.<br \/>\n&#8211; D\u00f9ng long \u0111en Inox + \u0111\u1ec7m ni-l\u00f4ng d\u01b0\u1edbi ch\u00e2n \u0111\u1ebf th\u00e9p \u0111en \u0111\u1ec3 gi\u1ea3m \u0103n m\u00f2n \u0111i\u1ec7n ho\u00e1.<\/p>\n<h3>3) Ven bi\u1ec3n, h\u1ea3i \u0111\u1ea3o, c\u00f4ng tr\u00ecnh g\u1ea7n bi\u1ec3n (<5 km b\u1edd bi\u1ec3n)<\/h3>\n<p>&#8211; T\u1ed1i thi\u1ec3u: A4-70\/A4-80 (316\/316L).<br \/>\n&#8211; Khu v\u1ef1c phun s\u00f3ng, c\u1ea7u c\u1ea3ng, t\u00e0u thuy\u1ec1n: C\u00e2n nh\u1eafc Duplex 2205 ho\u1eb7c 904L cho pitting\/crevice.<br \/>\n&#8211; Thi c\u00f4ng: Tr\u00e1nh khe h\u1edf \u0111\u1ecdng mu\u1ed1i; v\u1ec7 sinh \u0111\u1ecbnh k\u1ef3 \u0111\u1ec3 lo\u1ea1i b\u1ecf chloride.<\/p>\n<h3>4) H\u1ed3 b\u01a1i, spa, nh\u00e0 k\u00ednh \u1ea9m, nh\u00e0 x\u01b0\u1edfng c\u00f3 s\u01b0\u01a1ng mu\u1ed1i\/Cl-<\/h3>\n<p>&#8211; A4-70\/80 (316L) k\u00e8m thi\u1ebft k\u1ebf h\u1ea1n ch\u1ebf khe h\u1edf.<br \/>\n&#8211; V\u1edbi b\u1ec3 n\u01b0\u1edbc bi\u1ec3n, x\u00f4ng h\u01a1i \u1ea5m, khu indoor pool k\u00edn: c\u00e2n nh\u1eafc Duplex 2205; A2\/304 d\u1ec5 n\u1ee9t SCC trong kh\u00ed \u1ea9m ch\u1ee9a Cl-.<br \/>\n&#8211; Kh\u00f4ng d\u00f9ng nyloc g\u1ea7n 100\u00b0C; thay b\u1eb1ng \u00eacu kim lo\u1ea1i ch\u1ed1ng l\u1ecfng.<\/p>\n<h3>5) Th\u1ef1c ph\u1ea9m, d\u01b0\u1ee3c, thi\u1ebft b\u1ecb b\u1ebfp c\u00f4ng nghi\u1ec7p<\/h3>\n<p>&#8211; A2 ho\u1eb7c A4 t\u00f9y m\u00f4i tr\u01b0\u1eddng r\u1eeda t\u1ea9y; A4 cho n\u01b0\u1edbc mu\u1ed1i, n\u01b0\u1edbc t\u01b0\u01a1ng.<br \/>\n&#8211; \u01afu ti\u00ean b\u1ec1 m\u1eb7t \u0111i\u1ec7n ho\u00e1\/\u0111\u00e1nh b\u00f3ng, \u0111ai \u1ed1c ch\u1ee5p, \u0111\u1ea7u tr\u00f2n, tr\u00e1nh b\u1ec1 m\u1eb7t b\u1eaft c\u1eb7n, khe l\u1eafp.<br \/>\n&#8211; Keo kh\u00f3a ren c\u1ea5p th\u1ef1c ph\u1ea9m khi c\u1ea7n.<\/p>\n<h3>6) H\u00f3a ch\u1ea5t, n\u01b0\u1edbc th\u1ea3i, xi m\u1ea1, d\u1ec7t nhu\u1ed9m<\/h3>\n<p>&#8211; A4-70\/316L l\u00e0 \u0111i\u1ec3m kh\u1edfi \u0111\u1ea7u.<br \/>\n&#8211; Axit m\u1ea1nh\/ki\u1ec1m n\u00f3ng: tham kh\u1ea3o 904L, 316Ti (A5\/1.4571), Duplex ho\u1eb7c h\u1ee3p kim Ni (Hastelloy) theo SDS dung m\u00f4i.<br \/>\n&#8211; Lu\u00f4n th\u1eed \u0103n m\u00f2n th\u1ef1c \u0111\u1ecba n\u1ebfu n\u1ed3ng \u0111\u1ed9\/temperature kh\u00f4ng ch\u1eafc ch\u1eafn.<\/p>\n<h3>7) Nhi\u1ec7t \u0111\u1ed9 cao<\/h3>\n<p>&#8211; 304\/316 d\u00f9ng t\u1ed1t t\u1edbi kho\u1ea3ng 425\u00b0C (l\u00e0m vi\u1ec7c li\u00ean t\u1ee5c), cao h\u01a1n xem x\u00e9t 321\/347 ho\u1eb7c 310S; ki\u1ec3m tra ti\u00eau chu\u1ea9n ASTM A193 (B8\/B8M, B8T) cho bulong ch\u1ecbu nhi\u1ec7t.<br \/>\n&#8211; Tr\u00ean 120\u00b0C: tr\u00e1nh nyloc; d\u00f9ng \u00eacu kim lo\u1ea1i v\u00e0 keo kh\u00f3a ren ch\u1ecbu nhi\u1ec7t.<\/p>\n<h3>8) Ti\u1ebfp x\u00fac kim lo\u1ea1i kh\u00e1c (\u0103n m\u00f2n \u0111i\u1ec7n ho\u00e1)<\/h3>\n<p>&#8211; Inox ti\u1ebfp x\u00fac th\u00e9p carbon m\u1ea1 k\u1ebdm, nh\u00f4m ngo\u00e0i tr\u1eddi \u1ea9m c\u00f3 th\u1ec3 g\u00e2y pin \u0111i\u1ec7n ho\u00e1.<br \/>\n&#8211; Gi\u1ea3i ph\u00e1p: \u0110\u1ec7m c\u00e1ch \u0111i\u1ec7n (nylon\/PTFE), s\u01a1n\/xi l\u1edbp c\u00e1ch, m\u1ee1 c\u00e1ch \u0111i\u1ec7n; d\u00f9ng c\u00f9ng nh\u00f3m v\u1eadt li\u1ec7u khi c\u00f3 th\u1ec3.<\/p>\n<h2 id=\"toc-4-quy-trinh-chon-nhanh-5-buoc\">Quy tr\u00ecnh ch\u1ecdn nhanh 5 b\u01b0\u1edbc<\/h2>\n<p>1) X\u00e1c \u0111\u1ecbnh m\u00f4i tr\u01b0\u1eddng: \u1ea9m\/kh\u00f4, kho\u1ea3ng c\u00e1ch bi\u1ec3n, Cl- (ppm), ho\u00e1 ch\u1ea5t, nhi\u1ec7t \u0111\u1ed9, v\u1ec7 sinh.<br \/>\n2) Ch\u1ecdn m\u00e1c \u2013 c\u1ea5p b\u1ec1n:<br \/>\n   &#8211; Kh\u00f4\/ngo\u00e0i tr\u1eddi nh\u1eb9: A2-70;<br \/>\n   &#8211; Ven bi\u1ec3n\/Cl-: A4-70\/80;<br \/>\n   &#8211; Nhi\u1ec7t: 321\/ASTM A193 nh\u00f3m B8 bi\u1ebfn th\u1ec3;<br \/>\n   &#8211; Va \u0111\u1eadp\/c\u1ea7n c\u1ee9ng b\u1ec1 m\u1eb7t: c\u00e2n nh\u1eafc 410 (kh\u00f4).<br \/>\n3) Ch\u1ecdn h\u00ecnh d\u1ea1ng \u2013 ti\u00eau chu\u1ea9n: ISO 4017\/4762\/10642; \u0111ai \u1ed1c ISO 4032\/DIN 985; b\u1ed5 sung \u0111\u1ec7m ph\u00f9 h\u1ee3p.<br \/>\n4) Ch\u1ed1ng l\u1ecfng: Nyloc (\u2264100\u00b0C), \u0111ai \u1ed1c b\u00edch r\u0103ng c\u01b0a, \u00eacu \u0111\u00f4i, keo kh\u00f3a ren, long v\u00eanh \u2013 theo m\u1ee9c rung.<br \/>\n5) L\u1eafp \u0111\u1eb7t \u0111\u00fang k\u1ef9 thu\u1eadt: m\u00f4-men si\u1ebft, b\u00f4i tr\u01a1n ch\u1ed1ng k\u1eb9t ren, v\u1ec7 sinh\/passivation sau l\u1eafp.<\/p>\n<h2 id=\"toc-5-ky-thuat-lap-dat-mo-men-siet-chong-ket-ren-hoan-th\">K\u1ef9 thu\u1eadt l\u1eafp \u0111\u1eb7t: m\u00f4-men si\u1ebft, ch\u1ed1ng k\u1eb9t ren, ho\u00e0n thi\u1ec7n<\/h2>\n<p>&#8211; M\u00f4-men si\u1ebft tham kh\u1ea3o (c\u00f3 b\u00f4i tr\u01a1n anti-seize, K\u22480.18\u20130.20; ch\u1ec9 d\u1eabn chung, \u01b0u ti\u00ean t\u00e0i li\u1ec7u nh\u00e0 s\u1ea3n xu\u1ea5t):<br \/>\n  &#8211; M8, A2-70: kho\u1ea3ng 18\u201320 N\u00b7m.<br \/>\n  &#8211; M10, A2-70: kho\u1ea3ng 34\u201338 N\u00b7m.<br \/>\n  &#8211; Nguy\u00ean t\u1eafc: T \u2248 K \u00d7 F \u00d7 d; F ~ 0.7 \u00d7 proof \u00d7 As.<br \/>\n&#8211; Tr\u00e1nh k\u1eb9t ren (galling) \u2013 hi\u1ec7n t\u01b0\u1ee3ng ph\u1ed5 bi\u1ebfn v\u1edbi Inox:<br \/>\n  &#8211; D\u00f9ng m\u1ee1 ch\u1ed1ng k\u1eb9t ch\u1ee9a MoS2\/Ni ho\u1eb7c \u00eacu s\u00e1p b\u00f4i s\u1eb5n.<br \/>\n  &#8211; Si\u1ebft t\u1ed1c \u0111\u1ed9 ch\u1eadm, m\u00f4-men \u0111\u1ec1u, tr\u00e1nh s\u00fang b\u1eafn nhanh.<br \/>\n  &#8211; D\u00f9ng \u00eacu\/long \u0111en ch\u1ea5t l\u01b0\u1ee3ng, ren c\u00e1n (rolled thread) thay v\u00ec ti\u1ec7n.<br \/>\n  &#8211; Kh\u00f4ng tr\u1ed9n ren b\u1ea9n\/oxy h\u00f3a; v\u1ec7 sinh v\u00e0 passivation (ASTM A967) sau gia c\u00f4ng.<br \/>\n&#8211; Ho\u00e0n thi\u1ec7n b\u1ec1 m\u1eb7t: Passivation ho\u1eb7c \u0111i\u1ec7n ho\u00e1 gi\u00fap ph\u1ee5c h\u1ed3i l\u1edbp th\u1ee5 \u0111\u1ed9ng, t\u0103ng kh\u00e1ng g\u1ec9 \u0111\u00e1ng k\u1ec3, \u0111\u1eb7c bi\u1ec7t sau h\u00e0n\/c\u1eaft.<\/p>\n<h2 id=\"toc-6-loi-thuong-gap-va-cach-tranh\">L\u1ed7i th\u01b0\u1eddng g\u1eb7p v\u00e0 c\u00e1ch tr\u00e1nh<\/h2>\n<p>&#8211; D\u00f9ng 201 ngo\u00e0i tr\u1eddi\/ven bi\u1ec3n \u2192 \u1ed1 n\u00e2u nhanh: chuy\u1ec3n A2 ho\u1eb7c A4.<br \/>\n&#8211; Tr\u1ed9n Inox v\u1edbi th\u00e9p \u0111en\/m\u1ea1 k\u1ebdm kh\u00f4ng c\u00e1ch \u0111i\u1ec7n \u2192 r\u1ed7 ch\u00e2n, g\u1ec9 \u0111\u1ecf: th\u00eam \u0111\u1ec7m c\u00e1ch \u0111i\u1ec7n\/m\u1ea1 s\u01a1n b\u1ec1 m\u1eb7t.<br \/>\n&#8211; Si\u1ebft qu\u00e1 l\u1ef1c, kh\u00f4ng b\u00f4i tr\u01a1n \u2192 k\u1eb9t ren, \u0111\u1ee9t bulong: \u00e1p d\u1ee5ng m\u00f4-men chu\u1ea9n, anti-seize.<br \/>\n&#8211; D\u00f9ng nyloc \u1edf nhi\u1ec7t cao \u2192 m\u1ea5t kh\u00f3a: thay b\u1eb1ng gi\u1ea3i ph\u00e1p kim lo\u1ea1i\/keo ch\u1ecbu nhi\u1ec7t.<br \/>\n&#8211; Tin \u201ctest nam ch\u00e2m\u201d \u2192 ch\u1ecdn sai m\u00e1c: y\u00eau c\u1ea7u CO-CQ, ki\u1ec3m tra PMI khi quan tr\u1ecdng.<\/p>\n<h2 id=\"toc-7-goi-y-chon-nhanh-theo-moi-truong-tom-tat\">G\u1ee3i \u00fd ch\u1ecdn nhanh theo m\u00f4i tr\u01b0\u1eddng (t\u00f3m t\u1eaft)<\/h2>\n<p>&#8211; Trong nh\u00e0 kh\u00f4: 201 (ti\u1ebft ki\u1ec7m) ho\u1eb7c A2-70 (b\u1ec1n).<br \/>\n&#8211; Ngo\u00e0i tr\u1eddi \u0111\u00f4 th\u1ecb: A2-70\/A2-80.<br \/>\n&#8211; Ven bi\u1ec3n\/h\u1ed3 b\u01a1i\/Cl- cao: A4-70\/A4-80; kh\u1eafc nghi\u1ec7t: Duplex 2205\/904L.<br \/>\n&#8211; Th\u1ef1c ph\u1ea9m\/d\u01b0\u1ee3c: A2 ho\u1eb7c A4, \u0111\u1ea7u tr\u01a1n, \u0111ai \u1ed1c ch\u1ee5p, b\u1ec1 m\u1eb7t \u0111i\u1ec7n ho\u00e1.<br \/>\n&#8211; H\u00f3a ch\u1ea5t\/nhi\u1ec7t cao: 316L\/321\/ASTM A193 B8M\/B8T theo m\u00f4i tr\u01b0\u1eddng c\u1ee5 th\u1ec3.<\/p>\n<h2 id=\"toc-8-ban-nen-mua-loai-nao-tai-viet-nam\">B\u1ea1n n\u00ean mua lo\u1ea1i n\u00e0o t\u1ea1i Vi\u1ec7t Nam?<\/h2>\n<p>&#8211; K\u00edch c\u1ee1 s\u1eb5n c\u00f3: M3\u2013M24 ph\u1ed5 bi\u1ebfn; h\u00e0ng \u0111\u1eb7c bi\u1ec7t (Duplex, 904L, 321) n\u00ean \u0111\u1eb7t tr\u01b0\u1edbc.<br \/>\n&#8211; \u01afu ti\u00ean nh\u00e0 cung c\u1ea5p c\u00f3 ch\u1ee9ng ch\u1ec9 ISO 3506, CO-CQ, khai b\u00e1o m\u00e1c th\u00e9p EN\/ASTM r\u00f5 r\u00e0ng.<br \/>\n&#8211; Ki\u1ec3m tra gia c\u00f4ng ren c\u00e1n, b\u1ec1 m\u1eb7t kh\u00f4ng x\u01b0\u1edbc s\u00e2u, \u0111\u00f3ng g\u00f3i kh\u00f4 s\u1ea1ch \u0111\u1ec3 tr\u00e1nh b\u1ea9n\/halide.<\/p>\n<h2 id=\"toc-9-nguon-tham-khao-chinh\">Ngu\u1ed3n tham kh\u1ea3o ch\u00ednh<\/h2>\n<p>&#8211; ISO 3506-1\/-2: Mechanical properties of corrosion-resistant stainless steel fasteners.<br \/>\n&#8211; ASSDA \u2013 Australian Stainless Steel Development Association: Stainless steel selection and chlorides (assda.asn.au).<br \/>\n&#8211; BSSA \u2013 British Stainless Steel Association: Corrosion in swimming pool environments, galling prevention (bssa.org.uk).<br \/>\n&#8211; Nickel Institute: Guidelines for stainless steel in coastal\/marine environments (nickelinstitute.org).<br \/>\n&#8211; Fastenal Engineering &#038; Design Support: Torque values and galling guidance (fastenal.com).<br \/>\n&#8211; ASTM A967: Chemical Passivation Treatments for Stainless Steel Parts.<br \/>\n&#8211; ASTM A193\/A194: Alloy-Steel and Stainless Steel Bolting Materials for High-Temperature Service.<\/p>\n<h2 id=\"toc-10-ket-luan\">K\u1ebft lu\u1eadn<\/h2>\n<p>&#8211; Ch\u00eca kh\u00f3a ch\u1ecdn bulong, \u1ed1c v\u00edt, ecu Inox l\u00e0 gh\u00e9p \u0111\u00fang m\u00e1c th\u00e9p v\u1edbi m\u00f4i tr\u01b0\u1eddng: A2\/304 cho ngo\u00e0i tr\u1eddi th\u00f4ng th\u01b0\u1eddng; A4\/316 cho ven bi\u1ec3n, h\u1ed3 b\u01a1i v\u00e0 Cl-; 321\/ASTM A193 bi\u1ebfn th\u1ec3 cho nhi\u1ec7t; Duplex\/904L cho \u0111i\u1ec1u ki\u1ec7n c\u1ef1c \u0111oan.<br \/>\n&#8211; Thi\u1ebft k\u1ebf v\u00e0 thi c\u00f4ng \u0111\u00fang chu\u1ea9n (m\u00f4-men si\u1ebft, ch\u1ed1ng k\u1eb9t ren, c\u00e1ch \u0111i\u1ec7n, passivation) quy\u1ebft \u0111\u1ecbnh tu\u1ed5i th\u1ecd m\u1ed1i gh\u00e9p kh\u00f4ng k\u00e9m vi\u1ec7c ch\u1ecdn v\u1eadt li\u1ec7u.<br \/>\n&#8211; V\u1edbi d\u1ef1 \u00e1n c\u1ee5 th\u1ec3, h\u00e3y m\u00f4 t\u1ea3 m\u00f4i tr\u01b0\u1eddng, t\u1ea3i tr\u1ecdng v\u00e0 y\u00eau c\u1ea7u th\u1ea9m m\u1ef9\/v\u1ec7 sinh \u0111\u1ec3 nh\u1eadn t\u01b0 v\u1ea5n m\u00e1c, ti\u00eau chu\u1ea9n v\u00e0 gi\u1ea3i ph\u00e1p kh\u00f3a ren ph\u00f9 h\u1ee3p.<\/p>\n<p>C\u1ea7n t\u01b0 v\u1ea5n nhanh \u2013 ch\u00ednh x\u00e1c v\u00e0 b\u00e1o gi\u00e1 t\u1ed1t nh\u1ea5t cho bulong, \u1ed1c v\u00edt, ecu Inox t\u1ea1i H\u00e0 N\u1ed9i? Li\u00ean h\u1ec7 Inox C\u01b0\u1eddng Th\u1ecbnh: Hotline 0343.417.281 \u2013 Email inoxcongnghiep.cuongthinh@gmail.com.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Hi\u1ec3u r\u00f5 A2-70, A4-80, 201\/304\/316 v\u00e0 c\u00e1ch ch\u1ecdn bulong, \u1ed1c v\u00edt, ecu Inox cho trong nh\u00e0, ngo\u00e0i tr\u1eddi, ven bi\u1ec3n, h\u1ed3 b\u01a1i, ho\u00e1 ch\u1ea5t. K\u00e8m m\u1eb9o ch\u1ed1ng k\u1eb9t ren.<\/p>\n","protected":false},"author":7,"featured_media":1045,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[23],"tags":[],"class_list":["post-1692","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-tin-tuc"],"acf":[],"_links":{"self":[{"href":"https:\/\/inoxcuongthinh.com\/inct\/wp\/v2\/posts\/1692","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/inoxcuongthinh.com\/inct\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/inoxcuongthinh.com\/inct\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/inoxcuongthinh.com\/inct\/wp\/v2\/users\/7"}],"replies":[{"embeddable":true,"href":"https:\/\/inoxcuongthinh.com\/inct\/wp\/v2\/comments?post=1692"}],"version-history":[{"count":0,"href":"https:\/\/inoxcuongthinh.com\/inct\/wp\/v2\/posts\/1692\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/inoxcuongthinh.com\/inct\/wp\/v2\/media\/1045"}],"wp:attachment":[{"href":"https:\/\/inoxcuongthinh.com\/inct\/wp\/v2\/media?parent=1692"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/inoxcuongthinh.com\/inct\/wp\/v2\/categories?post=1692"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/inoxcuongthinh.com\/inct\/wp\/v2\/tags?post=1692"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}