{"id":1098,"date":"2025-09-24T00:34:23","date_gmt":"2025-09-23T17:34:23","guid":{"rendered":"https:\/\/inoxcuongthinh.com\/inox-va-thep-thuong-khac-nhau-the-nao-so-sanh-chi-tiet-a-z\/"},"modified":"2025-09-24T00:34:23","modified_gmt":"2025-09-23T17:34:23","slug":"inox-va-thep-thuong-khac-nhau-the-nao-so-sanh-chi-tiet-a-z","status":"publish","type":"post","link":"https:\/\/inoxcuongthinh.com\/inox-va-thep-thuong-khac-nhau-the-nao-so-sanh-chi-tiet-a-z\/","title":{"rendered":"Inox v\u00e0 Th\u00e9p th\u01b0\u1eddng kh\u00e1c nhau th\u1ebf n\u00e0o? So s\u00e1nh chi ti\u1ebft A\u2013Z"},"content":{"rendered":"<div class=\"custom-toc\">\n<h3>N\u1ed9i dung ch\u00ednh<\/h3>\n<ul>\n<li><a href=\"#toc-0-dinh-nghia-nhanh-inox-va-thep-thuong\">\u0110\u1ecbnh ngh\u0129a nhanh: Inox v\u00e0 Th\u00e9p th\u01b0\u1eddng<\/a><\/li>\n<li><a href=\"#toc-1-khac-biet-cot-loi-thanh-phan-va-co-che-chong-gi\">Kh\u00e1c bi\u1ec7t c\u1ed1t l\u00f5i: Th\u00e0nh ph\u1ea7n v\u00e0 c\u01a1 ch\u1ebf ch\u1ed1ng g\u1ec9<\/a><\/li>\n<li><a href=\"#toc-2-so-sanh-chi-tiet-theo-cac-tieu-chi-ky-thuat\">So s\u00e1nh chi ti\u1ebft theo c\u00e1c ti\u00eau ch\u00ed k\u1ef9 thu\u1eadt<\/a><\/li>\n<li><a href=\"#toc-3-mac-vat-lieu-pho-bien-va-tieu-chuan\">M\u00e1c v\u1eadt li\u1ec7u ph\u1ed5 bi\u1ebfn v\u00e0 ti\u00eau chu\u1ea9n<\/a><\/li>\n<li><a href=\"#toc-4-ung-dung-dien-hinh-chon-vat-lieu-theo-moi-truong\">\u1ee8ng d\u1ee5ng \u0111i\u1ec3n h\u00ecnh: ch\u1ecdn v\u1eadt li\u1ec7u theo m\u00f4i tr\u01b0\u1eddng<\/a><\/li>\n<li><a href=\"#toc-5-cach-chon-nhanh-6-cau-hoi-chot\">C\u00e1ch ch\u1ecdn nhanh: 6 c\u00e2u h\u1ecfi ch\u1ed1t<\/a><\/li>\n<li><a href=\"#toc-6-luu-y-ky-thuat-quan-trong-khi-thay-the-vat-lieu\">L\u01b0u \u00fd k\u1ef9 thu\u1eadt quan tr\u1ecdng khi thay th\u1ebf v\u1eadt li\u1ec7u<\/a><\/li>\n<li><a href=\"#toc-7-cac-hieu-lam-thuong-gap-debunk\">C\u00e1c hi\u1ec3u l\u1ea7m th\u01b0\u1eddng g\u1eb7p (debunk)<\/a><\/li>\n<li><a href=\"#toc-8-vi-du-thuc-te-nhanh-ha-noi-ven-bien-mien-bac\">V\u00ed d\u1ee5 th\u1ef1c t\u1ebf nhanh (H\u00e0 N\u1ed9i &#038; ven bi\u1ec3n mi\u1ec1n B\u1eafc)<\/a><\/li>\n<li><a href=\"#toc-9-quy-cach-cung-ung-thong-dung\">Quy c\u00e1ch cung \u1ee9ng th\u00f4ng d\u1ee5ng<\/a><\/li>\n<li><a href=\"#toc-10-ket-luan-chon-dung-ngay-tu-buoc-thiet-ke\">K\u1ebft lu\u1eadn: Ch\u1ecdn \u0111\u00fang ngay t\u1eeb b\u01b0\u1edbc thi\u1ebft k\u1ebf<\/a><\/li>\n<\/ul>\n<\/div>\n<p>Trong m\u1ecdi d\u1ef1 \u00e1n c\u01a1 kh\u00ed \u2013 x\u00e2y l\u1eafp, quy\u1ebft \u0111\u1ecbnh d\u00f9ng inox (th\u00e9p kh\u00f4ng g\u1ec9) hay th\u00e9p th\u01b0\u1eddng \u1ea3nh h\u01b0\u1edfng tr\u1ef1c ti\u1ebfp \u0111\u1ebfn \u0111\u1ed9 b\u1ec1n, chi ph\u00ed v\u00e0 b\u1ea3o tr\u00ec. B\u00e0i vi\u1ebft n\u00e0y ph\u00e2n t\u00edch \u0111\u1ea7y \u0111\u1ee7, c\u00f3 s\u1ed1 li\u1ec7u v\u00e0 v\u00ed d\u1ee5 th\u1ef1c t\u1ebf, gi\u00fap b\u1ea1n ch\u1ecdn \u0111\u00fang v\u1eadt li\u1ec7u ngay t\u1eeb \u0111\u1ea7u. \u0110\u00e2y l\u00e0 ki\u1ebfn th\u1ee9c n\u1ec1n t\u1ea3ng quan tr\u1ecdng trong ch\u1ee7 \u0111\u1ec1 Th\u00e9p kh\u00f4ng g\u1ec9 cho ng\u01b0\u1eddi m\u1edbi b\u1eaft \u0111\u1ea7u, nh\u01b0ng \u0111\u1ee7 s\u00e2u \u0111\u1ec3 k\u1ef9 s\u01b0 v\u00e0 ch\u1ee7 x\u01b0\u1edfng \u00e1p d\u1ee5ng ngay.<\/p>\n<h2 id=\"toc-0-dinh-nghia-nhanh-inox-va-thep-thuong\">\u0110\u1ecbnh ngh\u0129a nhanh: Inox v\u00e0 Th\u00e9p th\u01b0\u1eddng<\/h2>\n<p>&#8211; Inox (th\u00e9p kh\u00f4ng g\u1ec9): H\u1ecd th\u00e9p ch\u1ee9a t\u1ed1i thi\u1ec3u ~10,5% Cr, t\u1ea1o l\u1edbp m\u00e0ng th\u1ee5 \u0111\u1ed9ng Cr2O3 t\u1ef1 ph\u1ee5c h\u1ed3i, ch\u1ed1ng \u0103n m\u00f2n v\u01b0\u1ee3t tr\u1ed9i. Nh\u00f3m ch\u00ednh: Austenitic (304, 316, 201), Ferritic (430), Martensitic (410).<br \/>\n&#8211; Th\u00e9p th\u01b0\u1eddng: Ch\u1ee7 y\u1ebfu l\u00e0 th\u00e9p carbon ho\u1eb7c th\u00e9p h\u1ee3p kim th\u1ea5p (C ~0,05\u20130,6%, Mn, Si, \u0111\u00f4i khi th\u00eam Cr, Mo \u00edt). Kh\u00f4ng c\u00f3 l\u1edbp th\u1ee5 \u0111\u1ed9ng t\u1ef1 nhi\u00ean; c\u1ea7n s\u01a1n\/m\u1ea1 \u0111\u1ec3 ch\u1ed1ng g\u1ec9. C\u00e1c m\u00e1c ph\u1ed5 bi\u1ebfn: Q235\/A36\/SS400 (k\u1ebft c\u1ea5u), C45\/S45C (tr\u1ee5c), 20MnSi, v.v.<\/p>\n<h2 id=\"toc-1-khac-biet-cot-loi-thanh-phan-va-co-che-chong-gi\">Kh\u00e1c bi\u1ec7t c\u1ed1t l\u00f5i: Th\u00e0nh ph\u1ea7n v\u00e0 c\u01a1 ch\u1ebf ch\u1ed1ng g\u1ec9<\/h2>\n<p>&#8211; Inox:<br \/>\n  &#8211; \u226510,5% Cr t\u1ea1o m\u00e0ng th\u1ee5 \u0111\u1ed9ng d\u00e0y v\u00e0i nm, t\u1ef1 t\u00e1i t\u1ea1o khi b\u1ecb x\u01b0\u1edbc n\u1ebfu c\u00f3 oxy.<br \/>\n  &#8211; Ni (trong 304\/316) \u1ed5n \u0111\u1ecbnh pha austenit, t\u0103ng d\u1ebbo v\u00e0 ch\u1ed1ng \u0103n m\u00f2n t\u1ed5ng qu\u00e1t.<br \/>\n  &#8211; Mo (trong 316) t\u0103ng ch\u1ed1ng r\u1ed7 pitting trong m\u00f4i tr\u01b0\u1eddng Cl\u2013.<br \/>\n&#8211; Th\u00e9p th\u01b0\u1eddng:<br \/>\n  &#8211; H\u00e0m l\u01b0\u1ee3ng Cr th\u1ea5p, kh\u00f4ng h\u00ecnh th\u00e0nh passivation; s\u1eaft b\u1ecb oxy h\u00f3a t\u1ea1o g\u1ec9 Fe2O3\/hydroxide, bong tr\u00f3c, \u0103n m\u00f2n ti\u1ebfp di\u1ec5n.<br \/>\n  &#8211; C\u00e0ng nhi\u1ec1u C, kh\u1ea3 n\u0103ng t\u00f4i c\u1ee9ng\/\u0111\u1ed9 b\u1ec1n t\u0103ng nh\u01b0ng \u0111\u1ed9 d\u1ebbo, h\u00e0n gi\u1ea3m.<\/p>\n<h2 id=\"toc-2-so-sanh-chi-tiet-theo-cac-tieu-chi-ky-thuat\">So s\u00e1nh chi ti\u1ebft theo c\u00e1c ti\u00eau ch\u00ed k\u1ef9 thu\u1eadt<\/h2>\n<h3>1) Kh\u1ea3 n\u0103ng ch\u1ed1ng \u0103n m\u00f2n<\/h3>\n<p>&#8211; Inox:<br \/>\n  &#8211; 304: D\u00f9ng \u0111\u01b0\u1ee3c ngo\u00e0i tr\u1eddi \u0111\u00f4 th\u1ecb\/n\u1ed9i th\u1ea5t; nh\u1ea1y v\u1edbi Cl\u2013 \u0111\u1eadm \u0111\u1eb7c (ven bi\u1ec3n, h\u1ed3 b\u01a1i).<br \/>\n  &#8211; 316\/316L: Th\u00eam ~2% Mo, ch\u1ed1ng r\u1ed7 Cl\u2013 t\u1ed1t h\u01a1n; ph\u00f9 h\u1ee3p bi\u1ec3n, h\u00f3a ch\u1ea5t nh\u1eb9. PREN \u0111i\u1ec3n h\u00ecnh: 304 ~18\u201319; 316 ~23\u201324 (cao h\u01a1n t\u1ed1t h\u01a1n).<br \/>\n  &#8211; 201: Ni th\u1ea5p, Mn\/N cao; ch\u1ed1ng g\u1ec9 k\u00e9m h\u01a1n 304, d\u1ec5 \u1ed1 \u1edf m\u00f4i tr\u01b0\u1eddng \u1ea9m\/bi\u1ec3n\/axit nh\u1eb9.<br \/>\n  &#8211; 430 (ferritic): Ch\u1ed1ng g\u1ec9 n\u1ed9i th\u1ea5t\/kh\u00f4 \u1ed5n; k\u00e9m 304 \u1edf ngo\u00e0i tr\u1eddi \u1ea9m\/mu\u1ed1i.<br \/>\n&#8211; Th\u00e9p th\u01b0\u1eddng:<br \/>\n  &#8211; G\u1ec9 nhanh n\u1ebfu kh\u00f4ng s\u01a1n\/m\u1ea1. HDG (m\u1ea1 k\u1ebdm nh\u00fang n\u00f3ng) k\u00e9o d\u00e0i tu\u1ed5i th\u1ecd ngo\u00e0i tr\u1eddi, nh\u01b0ng l\u1edbp k\u1ebdm c\u00f3 th\u1ec3 b\u1ecb \u0103n m\u00f2n trong m\u00f4i tr\u01b0\u1eddng axit\/ki\u1ec1m ho\u1eb7c x\u01b0\u1edbc s\u00e2u.<br \/>\n&#8211; G\u1ee3i \u00fd:<br \/>\n  &#8211; Ven bi\u1ec3n (<5 km): \u01afu ti\u00ean 316; n\u1ebfu 304 b\u1eaft bu\u1ed9c, thi\u1ebft k\u1ebf tr\u00e1nh \u0111\u1ecdng n\u01b0\u1edbc, t\u0103ng b\u1ea3o tr\u00ec, c\u00f3 th\u1ec3 ph\u1ee7 clear-coat.\n  - N\u1ed9i th\u1ea5t kh\u00f4: 201\/430 c\u00f3 th\u1ec3 \u0111\u1ee7, c\u00e2n nh\u1eafc th\u1ea9m m\u1ef9 v\u00e0 chi ph\u00ed.\n\n\n\n<h3>2) C\u01a1 t\u00ednh (\u0111\u1ed9 b\u1ec1n k\u00e9o, ch\u1ea3y, \u0111\u1ed9 c\u1ee9ng)<\/h3>\n<p>&#8211; Inox austenitic (304\/316):<br \/>\n  &#8211; Rp0.2 (gi\u1edbi h\u1ea1n ch\u1ea3y): ~200\u2013300 MPa; Rm (k\u00e9o \u0111\u1ee9t): ~520\u2013700 MPa; \u0111\u1ed9 gi\u00e3n d\u00e0i cao (~40\u201360%).<br \/>\n  &#8211; L\u00e0m c\u1ee9ng bi\u1ebfn d\u1ea1ng m\u1ea1nh (work hardening), sau d\u1eadp k\u00e9o b\u1ec1n t\u0103ng \u0111\u00e1ng k\u1ec3.<br \/>\n&#8211; Th\u00e9p carbon k\u1ebft c\u1ea5u (A36\/Q235\/SS400):<br \/>\n  &#8211; Rp0.2: ~235\u2013250 MPa; Rm: ~400\u2013560 MPa; d\u1ebbo v\u1eeba.<br \/>\n&#8211; Th\u00e9p carbon trung b\u00ecnh (C45):<br \/>\n  &#8211; T\u00f4i ram \u0111\u1ea1t \u0111\u1ed9 c\u1ee9ng\/\u0111\u1ed9 b\u1ec1n cao h\u01a1n \u0111\u00e1ng k\u1ec3 cho tr\u1ee5c, b\u00e1nh r\u0103ng.<br \/>\n&#8211; K\u1ebft lu\u1eadn: N\u1ebfu c\u1ea7n b\u1ec1n k\u00e9o c\u1ef1c cao v\u00e0 c\u00f3 x\u1eed l\u00fd nhi\u1ec7t, th\u00e9p carbon\/h\u1ee3p kim th\u1ea5p ph\u00f9 h\u1ee3p h\u01a1n. N\u1ebfu c\u1ea7n d\u1ebbo, ch\u1ecbu va \u0111\u1eadp, kh\u00f4ng g\u1ec9 \u2013 inox austenitic v\u01b0\u1ee3t tr\u1ed9i.<\/p>\n<h3>3) Ch\u1ecbu nhi\u1ec7t v\u00e0 gi\u00e3n n\u1edf nhi\u1ec7t<\/h3>\n<p>&#8211; Nhi\u1ec7t \u0111\u1ed9 l\u00e0m vi\u1ec7c:<br \/>\n  &#8211; 304\/316: ~\u2013196 \u0111\u1ebfn 600\u00b0C (304) ho\u1eb7c 870\u00b0C ng\u1eafn h\u1ea1n t\u00f9y m\u00f4i tr\u01b0\u1eddng; 430 ch\u1ecbu kh\u00f4 t\u1ed1t t\u1edbi ~815\u00b0C.<br \/>\n  &#8211; Th\u00e9p carbon:  -30 \u0111\u1ebfn 425\u00b0C th\u00f4ng d\u1ee5ng; tr\u00ean 425\u00b0C nguy c\u01a1 graphit h\u00f3a (t\u00f9y m\u00e1c).<br \/>\n&#8211; H\u1ec7 s\u1ed1 gi\u00e3n n\u1edf nhi\u1ec7t:<br \/>\n  &#8211; Inox austenitic: ~16\u201317 \u00b5m\/m\u00b7K (cao h\u01a1n).<br \/>\n  &#8211; Th\u00e9p carbon: ~11\u201312 \u00b5m\/m\u00b7K.<br \/>\n&#8211; H\u1ec7 qu\u1ea3 thi\u1ebft k\u1ebf: L\u1eafp gh\u00e9p kh\u00e1c v\u1eadt li\u1ec7u c\u1ea7n khe co gi\u00e3n, t\u00ednh bi\u1ebfn d\u1ea1ng nhi\u1ec7t v\u1edbi inox.<\/p>\n<h3>4) D\u1eabn nhi\u1ec7t v\u00e0 \u0111i\u1ec7n<\/h3>\n<p>&#8211; D\u1eabn nhi\u1ec7t (\u2248, \u1edf 20\u00b0C):<br \/>\n  &#8211; 304: ~16 W\/m\u00b7K; 316: ~14 W\/m\u00b7K (th\u1ea5p).<br \/>\n  &#8211; Th\u00e9p carbon: ~45\u201360 W\/m\u00b7K (cao h\u01a1n).<br \/>\n&#8211; \u0110i\u1ec7n tr\u1edf su\u1ea5t: Inox cao h\u01a1n th\u00e9p carbon \u2192 n\u00f3ng h\u01a1n khi d\u00f2ng \u0111i\u1ec7n ch\u1ea1y; c\u00e2n nh\u1eafc trong thanh g\u00f3p, k\u1eb9p \u0111i\u1ec7n.<\/p>\n<h3>5) T\u1eeb t\u00ednh<\/h3>\n<p>&#8211; 304\/316 (austenitic): G\u1ea7n nh\u01b0 kh\u00f4ng t\u1eeb t\u00ednh \u1edf \u1ee7, nh\u01b0ng c\u00f3 th\u1ec3 nhi\u1ec5m t\u1eeb nh\u1eb9 sau gia c\u00f4ng ngu\u1ed9i.<br \/>\n&#8211; 430 (ferritic), 410 (martensitic): T\u1eeb t\u00ednh r\u00f5.<br \/>\n&#8211; Th\u00e9p carbon: T\u1eeb t\u00ednh.<br \/>\n&#8211; L\u01b0u \u00fd khi y\u00eau c\u1ea7u \u201ckh\u00f4ng h\u00fat nam ch\u00e2m\u201d: Ch\u1ecdn 304\/316 \u1ee7 (annealed) v\u00e0 h\u1ea1n ch\u1ebf k\u00e9o ngu\u1ed9i.<\/p>\n<h3>6) Gia c\u00f4ng c\u1eaft, u\u1ed1n, d\u1eadp, ti\u1ec7n phay<\/h3>\n<p>&#8211; Inox austenitic: \u0110\u1ed9 b\u1ec1n h\u00f3a b\u1ec1n cao \u2192 l\u01b0\u1ee1i c\u1eaft nhanh c\u00f9n; c\u1ea7n dao h\u1ee3p kim t\u1ed1t, t\u1ed1c \u0111\u1ed9 c\u1eaft th\u1ea5p h\u01a1n, l\u00e0m m\u00e1t \u0111\u1ea7y \u0111\u1ee7. U\u1ed1n c\u00f3 springback l\u1edbn h\u01a1n th\u00e9p th\u01b0\u1eddng ~1,2\u20131,5 l\u1ea7n; c\u1ea7n ch\u00e0y c\u1ed1i ph\u00f9 h\u1ee3p.<br \/>\n&#8211; Th\u00e9p carbon: D\u1ec5 c\u1eaft\/gia c\u00f4ng h\u01a1n; springback th\u1ea5p h\u01a1n; d\u1eadp s\u00e2u thu\u1eadn l\u1ee3i v\u1edbi m\u00e1c ph\u00f9 h\u1ee3p.<\/p>\n<h3>7) H\u00e0n<\/h3>\n<p>&#8211; Inox:<br \/>\n  &#8211; D\u00f9ng d\u00e2y\/que t\u01b0\u01a1ng th\u00edch: 304 \u2192 308\/308L; 316 \u2192 316L; \u01b0u ti\u00ean \u201cL\u201d (C th\u1ea5p) tr\u00e1nh k\u1ebft t\u1ee7a Cr-carbide (nh\u1ea1y h\u00f3a) v\u00f9ng HAZ.<br \/>\n  &#8211; L\u00e0m s\u1ea1ch sau h\u00e0n: pickling\/passivation theo ASTM A967 \u0111\u1ec3 kh\u00f4i ph\u1ee5c l\u1edbp th\u1ee5 \u0111\u1ed9ng.<br \/>\n&#8211; Th\u00e9p carbon:<br \/>\n  &#8211; M\u00e1c C cao c\u1ea7n preheat\/post-heat \u0111\u1ec3 tr\u00e1nh n\u1ee9t ngu\u1ed9i; ch\u1ecdn que E6013\/E7018 t\u00f9y y\u00eau c\u1ea7u.<br \/>\n  &#8211; H\u00e0n th\u00e9p m\u1ea1 k\u1ebdm: Ph\u1ea3i m\u00e0i b\u1ecf k\u1ebdm t\u1ea1i v\u00f9ng h\u00e0n v\u00e0 th\u00f4ng gi\u00f3 t\u1ed1t (kh\u00ed k\u1ebdm \u0111\u1ed9c).<br \/>\n&#8211; H\u00e0n kh\u00e1c v\u1eadt li\u1ec7u (inox\u2013th\u00e9p): D\u00f9ng v\u1eadt li\u1ec7u h\u00e0n chuy\u00ean d\u1ee5ng (309L), ki\u1ec3m so\u00e1t \u0103n m\u00f2n galvanic.<\/p>\n<h3>8) B\u1ec1 m\u1eb7t v\u00e0 th\u1ea9m m\u1ef9<\/h3>\n<p>&#8211; Inox: Nhi\u1ec1u ho\u00e0n thi\u1ec7n b\u1ec1 m\u1eb7t \u2013 No.1 (c\u00e1n n\u00f3ng), 2B (tr\u1eafng m\u1edd), BA (b\u00f3ng g\u01b0\u01a1ng), HL (hairline), No.4 (x\u01b0\u1edbc m\u1ecbn). D\u1ec5 v\u1ec7 sinh, gi\u1eef th\u1ea9m m\u1ef9 l\u00e2u.<br \/>\n&#8211; Th\u00e9p th\u01b0\u1eddng: C\u1ea7n s\u01a1n, m\u1ea1 k\u1ebdm, m\u1ea1 Ni\/Cr \u0111\u1ec3 \u0111\u1ea1t th\u1ea9m m\u1ef9 v\u00e0 ch\u1ed1ng g\u1ec9; b\u1ec1 m\u1eb7t xu\u1ed1ng c\u1ea5p khi l\u1edbp ph\u1ee7 h\u1ecfng.<\/p>\n<h3>9) V\u1ec7 sinh \u2013 an to\u00e0n th\u1ef1c ph\u1ea9m<\/h3>\n<p>&#8211; 304\/316 \u0111\u1ea1t chu\u1ea9n thi\u1ebft b\u1ecb th\u1ef1c ph\u1ea9m, y t\u1ebf, n\u01b0\u1edbc s\u1ea1ch (khi x\u1eed l\u00fd b\u1ec1 m\u1eb7t \u0111\u00fang). 316 \u01b0u th\u1ebf v\u1edbi Cl\u2013 (n\u01b0\u1edbc mu\u1ed1i, h\u1ea3i s\u1ea3n).<br \/>\n&#8211; Th\u00e9p th\u01b0\u1eddng: Kh\u00f4ng ph\u00f9 h\u1ee3p ti\u1ebfp x\u00fac tr\u1ef1c ti\u1ebfp th\u1ef1c ph\u1ea9m\/n\u01b0\u1edbc u\u1ed1ng tr\u1eeb khi ph\u1ee7 chuy\u00ean d\u1ee5ng.<\/p>\n<h3>10) \u0110\u1ed9 b\u1ec1n ngo\u00e0i tr\u1eddi v\u00e0 b\u1ea3o tr\u00ec<\/h3>\n<p>&#8211; Inox 304\/316: B\u1ea3o tr\u00ec th\u1ea5p; v\u1ec7 sinh \u0111\u1ecbnh k\u1ef3 \u0111\u1ec3 tr\u00e1nh \u0111\u1ecdng mu\u1ed1i\/b\u1ee5i c\u00f4ng nghi\u1ec7p.<br \/>\n&#8211; Th\u00e9p m\u1ea1 k\u1ebdm\/s\u01a1n: C\u1ea7n s\u01a1n b\u1ea3o tr\u00ec theo chu k\u1ef3 (3\u20137 n\u0103m t\u00f9y m\u00f4i tr\u01b0\u1eddng v\u00e0 h\u1ec7 s\u01a1n).<\/p>\n<h3>11) Chi ph\u00ed v\u00e0 t\u1ed5ng chi ph\u00ed v\u00f2ng \u0111\u1eddi (LCC)<\/h3>\n<p>&#8211; V\u1eadt li\u1ec7u ban \u0111\u1ea7u:<br \/>\n  &#8211; Th\u00e9p th\u01b0\u1eddng = 1x (tham chi\u1ebfu).<br \/>\n  &#8211; Inox 201 \u2248 1,4\u20131,7x; 304 \u2248 2,0\u20133,0x; 316 \u2248 3,0\u20134,0x (bi\u1ebfn \u0111\u1ed9ng theo Ni\/Mo, th\u1ecb tr\u01b0\u1eddng).<br \/>\n&#8211; LCC:<br \/>\n  &#8211; Inox gi\u1ea3m chi ph\u00ed s\u01a1n\/b\u1ea3o tr\u00ec\/thay th\u1ebf \u2192 th\u01b0\u1eddng r\u1ebb h\u01a1n trong 3\u201310 n\u0103m v\u1edbi c\u00f4ng tr\u00ecnh ngo\u00e0i tr\u1eddi\/\u1ea9m.<br \/>\n&#8211; G\u1ee3i \u00fd: N\u1ebfu v\u00f2ng \u0111\u1eddi >5 n\u0103m v\u00e0 m\u00f4i tr\u01b0\u1eddng \u0103n m\u00f2n, \u01b0u ti\u00ean inox.<\/p>\n<h3>12) T\u00ednh b\u1ec1n v\u1eefng<\/h3>\n<p>&#8211; C\u1ea3 inox v\u00e0 th\u00e9p th\u01b0\u1eddng \u0111\u1ec1u t\u00e1i ch\u1ebf cao (>85%). Inox th\u01b0\u1eddng ch\u1ee9a 60\u201390% ph\u1ebf li\u1ec7u t\u00e1i ch\u1ebf. Tu\u1ed5i th\u1ecd d\u00e0i = \u00edt r\u00e1c th\u1ea3i, \u00edt s\u01a1n ch\u1ee9a VOC.<\/p>\n<h2 id=\"toc-3-mac-vat-lieu-pho-bien-va-tieu-chuan\">M\u00e1c v\u1eadt li\u1ec7u ph\u1ed5 bi\u1ebfn v\u00e0 ti\u00eau chu\u1ea9n<\/h2>\n<p>&#8211; Inox:<br \/>\n  &#8211; Austenitic: 201, 304\/304L, 316\/316L. Ti\u00eau chu\u1ea9n: ASTM A240 (t\u1ea5m\/cu\u1ed9n), A312 (\u1ed1ng), A276 (thanh); JIS G4304\/G4305\/G4303.<br \/>\n  &#8211; Ferritic: 430 (AISI 430).<br \/>\n  &#8211; Martensitic: 410 (AISI 410) cho dao c\u1ee5, chi ti\u1ebft ch\u1ecbu m\u00e0i m\u00f2n.<br \/>\n&#8211; Th\u00e9p th\u01b0\u1eddng:<br \/>\n  &#8211; K\u1ebft c\u1ea5u: ASTM A36, JIS G3101 SS400, EN S235JR\/S275JR, Q235. T\u1ea1i VN hay g\u1ecdi CT3 t\u01b0\u01a1ng \u0111\u01b0\u01a1ng g\u1ea7n SS400.<br \/>\n  &#8211; C trung b\u00ecnh: C45 (JIS S45C), C20\u2013C60 cho tr\u1ee5c, b\u00e1nh r\u0103ng.<br \/>\n&#8211; Ch\u1ee9ng ch\u1ec9 c\u1ea7n c\u00f3 khi mua:<br \/>\n  &#8211; MTC 3.1 (Mill Test Certificate), CO\/CQ, ti\u00eau chu\u1ea9n b\u1ec1 m\u1eb7t (No.1\/2B\/BA\/HL), \u0111\u1ed9 d\u00e0y l\u1edbp k\u1ebdm (n\u1ebfu m\u1ea1).<\/p>\n<h2 id=\"toc-4-ung-dung-dien-hinh-chon-vat-lieu-theo-moi-truong\">\u1ee8ng d\u1ee5ng \u0111i\u1ec3n h\u00ecnh: ch\u1ecdn v\u1eadt li\u1ec7u theo m\u00f4i tr\u01b0\u1eddng<\/h2>\n<p>&#8211; N\u1ed9i th\u1ea5t, \u0111\u1ed3 gia d\u1ee5ng kh\u00f4: Inox 201\/430, 304 cho \u0111\u1ed3 cao c\u1ea5p.<br \/>\n&#8211; Lan can, m\u1eb7t d\u1ef1ng ngo\u00e0i tr\u1eddi \u0111\u00f4 th\u1ecb: Inox 304; ven bi\u1ec3n\/h\u1ed3 b\u01a1i: 316.<br \/>\n&#8211; B\u1ed3n, \u1ed1ng th\u1ef1c ph\u1ea9m \u2013 d\u01b0\u1ee3c \u2013 n\u01b0\u1edbc: 304\/316L (\u01b0u ti\u00ean \u201cL\u201d \u0111\u1ec3 h\u00e0n).<br \/>\n&#8211; K\u1ebft c\u1ea5u nh\u00e0 x\u01b0\u1edfng, v\u00ec k\u00e8o, d\u1ea7m: Th\u00e9p A36\/SS400; ngo\u00e0i tr\u1eddi n\u00ean m\u1ea1 k\u1ebdm nh\u00fang n\u00f3ng + s\u01a1n ph\u1ee7 n\u1ebfu m\u00f4i tr\u01b0\u1eddng C3\u2013C4 (theo ISO 12944).<br \/>\n&#8211; Tr\u1ee5c, b\u00e1nh r\u0103ng, chi ti\u1ebft ch\u1ecbu t\u1ea3i: C45, 40Cr; y\u00eau c\u1ea7u ch\u1ed1ng g\u1ec9 b\u1ed5 sung b\u1eb1ng m\u1ea1\/nhi\u1ec7t luy\u1ec7n \u0111\u1eb7c th\u00f9.<br \/>\n&#8211; \u1ed0ng tho\u00e1t n\u01b0\u1edbc bi\u1ec3n, c\u1ea7u c\u1ea3ng: Inox 316L ho\u1eb7c th\u00e9p m\u1ea1 k\u1ebdm d\u00e0y + b\u1ea3o tr\u00ec d\u00e0y \u0111\u1eb7c (t\u00f9y ng\u00e2n s\u00e1ch).<\/p>\n<h2 id=\"toc-5-cach-chon-nhanh-6-cau-hoi-chot\">C\u00e1ch ch\u1ecdn nhanh: 6 c\u00e2u h\u1ecfi ch\u1ed1t<\/h2>\n<p>1) M\u00f4i tr\u01b0\u1eddng c\u00f3 \u1ea9m\/Cl\u2013\/h\u00f3a ch\u1ea5t kh\u00f4ng?<br \/>\n&#8211; C\u00f3, m\u1ee9c cao (bi\u1ec3n\/h\u1ed3 b\u01a1i): 316\/316L.<br \/>\n&#8211; C\u00f3, m\u1ee9c trung b\u00ecnh (ngo\u00e0i tr\u1eddi \u0111\u00f4 th\u1ecb): 304.<br \/>\n&#8211; \u00cdt\/kh\u00f4: 201\/430 ho\u1eb7c th\u00e9p th\u01b0\u1eddng s\u01a1n\/m\u1ea1.<br \/>\n2) Y\u00eau c\u1ea7u v\u1ec7 sinh\/th\u1ef1c ph\u1ea9m?<br \/>\n&#8211; C\u00f3: 304\/316L, b\u1ec1 m\u1eb7t 2B\/BA, m\u1ed1i h\u00e0n pickling\/passivation.<br \/>\n3) Y\u00eau c\u1ea7u b\u1ec1n k\u00e9o\/\u0111\u1ed9 c\u1ee9ng r\u1ea5t cao v\u00e0 c\u00f3 x\u1eed l\u00fd nhi\u1ec7t?<br \/>\n&#8211; C\u00f3: Th\u00e9p carbon\/h\u1ee3p kim th\u1ea5p (C45, 42CrMo) + b\u1ea3o v\u1ec7 ch\u1ed1ng g\u1ec9.<br \/>\n4) Y\u00eau c\u1ea7u kh\u00f4ng t\u1eeb t\u00ednh?<br \/>\n&#8211; 304\/316 \u1ee7; h\u1ea1n ch\u1ebf gia c\u00f4ng ngu\u1ed9i.<br \/>\n5) Ng\u00e2n s\u00e1ch ban \u0111\u1ea7u h\u1ea1n ch\u1ebf nh\u01b0ng v\u00f2ng \u0111\u1eddi d\u00e0i?<br \/>\n&#8211; C\u00e2n nh\u1eafc LCC: Inox 304 c\u00f3 th\u1ec3 r\u1ebb h\u01a1n t\u1ed5ng th\u1ec3 sau 3\u20135 n\u0103m so v\u1edbi th\u00e9p m\u1ea1\/s\u01a1n.<br \/>\n6) Quy tr\u00ecnh gia c\u00f4ng s\u1eb5n c\u00f3?<br \/>\n&#8211; N\u1ebfu x\u01b0\u1edfng ch\u1ee7 y\u1ebfu gia c\u00f4ng th\u00e9p th\u01b0\u1eddng, xem x\u00e9t dao\/c\u00f4ng ngh\u1ec7 ph\u00f9 h\u1ee3p khi chuy\u1ec3n sang inox (t\u1ed1c \u0111\u1ed9 c\u1eaft, l\u00e0m m\u00e1t).<\/p>\n<h2 id=\"toc-6-luu-y-ky-thuat-quan-trong-khi-thay-the-vat-lieu\">L\u01b0u \u00fd k\u1ef9 thu\u1eadt quan tr\u1ecdng khi thay th\u1ebf v\u1eadt li\u1ec7u<\/h2>\n<p>&#8211; Kh\u00f4ng thay 304 b\u1eb1ng 201 \u1edf ngo\u1ea1i th\u1ea5t \u1ea9m\/ven bi\u1ec3n: D\u1ec5 \u1ed1 v\u00e0ng, r\u1ed7 ch\u1ec9 sau v\u00e0i th\u00e1ng.<br \/>\n&#8211; Tr\u00e1nh c\u1eb7p \u0111\u00f4i \u0111i\u1ec7n h\u00f3a: B\u1eaft bul\u00f4ng th\u00e9p carbon v\u00e0o inox \u1edf m\u00f4i tr\u01b0\u1eddng \u1ea9m \u2192 n\u00ean d\u00f9ng bul\u00f4ng inox c\u00f9ng c\u1ea5p ho\u1eb7c c\u00e1ch \u0111i\u1ec7n.<br \/>\n&#8211; Thi\u1ebft k\u1ebf tho\u00e1t n\u01b0\u1edbc: Inox c\u0169ng s\u1ebd b\u1ea9n n\u1ebfu \u0111\u1ecdng n\u01b0\u1edbc\/mu\u1ed1i; bo m\u00e9p, khoan l\u1ed7 tho\u00e1t, tr\u00e1nh k\u1ebd h\u1edf capillary.<br \/>\n&#8211; Sau h\u00e0n inox: L\u00e0m s\u1ea1ch x\u1ec9, t\u1ea9y m\u1ed1i h\u00e0n v\u00e0 passivation \u0111\u1ec3 ph\u1ee5c h\u1ed3i ch\u1ed1ng g\u1ec9.<br \/>\n&#8211; H\u00e0n tr\u00ean th\u00e9p m\u1ea1 k\u1ebdm: X\u1eed l\u00fd an to\u00e0n h\u01a1i k\u1ebdm; s\u01a1n ph\u1ee5c h\u1ed3i k\u1ebdm t\u1ea1i v\u00f9ng h\u00e0n.<\/p>\n<h2 id=\"toc-7-cac-hieu-lam-thuong-gap-debunk\">C\u00e1c hi\u1ec3u l\u1ea7m th\u01b0\u1eddng g\u1eb7p (debunk)<\/h2>\n<p>&#8211; \u201cInox kh\u00f4ng bao gi\u1edd g\u1ec9\u201d: Sai. Ch\u1ecdn sai m\u00e1c, gia c\u00f4ng sai, ho\u1eb7c m\u00f4i tr\u01b0\u1eddng Cl\u2013 cao v\u1eabn g\u00e2y r\u1ed7\/tea-staining.<br \/>\n&#8211; \u201cNam ch\u00e2m kh\u00f4ng h\u00fat l\u00e0 inox t\u1ed1t\u201d: Sai m\u1ed9t ph\u1ea7n. 304\/316 c\u00f3 th\u1ec3 nhi\u1ec5m t\u1eeb sau k\u00e9o ngu\u1ed9i; 430 l\u00e0 inox th\u1eadt nh\u01b0ng h\u00fat nam ch\u00e2m.<br \/>\n&#8211; \u201cD\u00f9ng 304 \u1edf bi\u1ec3n l\u00e0 \u0111\u1ee7\u201d: Nhi\u1ec1u tr\u01b0\u1eddng h\u1ee3p c\u1ea7n 316\/duplex ho\u1eb7c x\u1eed l\u00fd b\u1ec1 m\u1eb7t, \u0111\u1eb7c bi\u1ec7t v\u00f9ng phun s\u00f3ng.<\/p>\n<h2 id=\"toc-8-vi-du-thuc-te-nhanh-ha-noi-ven-bien-mien-bac\">V\u00ed d\u1ee5 th\u1ef1c t\u1ebf nhanh (H\u00e0 N\u1ed9i &#038; ven bi\u1ec3n mi\u1ec1n B\u1eafc)<\/h2>\n<p>&#8211; Lan can ban c\u00f4ng H\u00e0 N\u1ed9i (kh\u00f4ng g\u1ea7n bi\u1ec3n): 304 HL No.4, h\u00e0n 308L, passivation, v\u1ec7 sinh 6 th\u00e1ng\/l\u1ea7n \u2192 gi\u1eef b\u00f3ng, kh\u00f4ng \u1ed1 sau nhi\u1ec1u n\u0103m.<br \/>\n&#8211; C\u1ea7u c\u1ea3ng C\u00e1t B\u00e0: 316L t\u1ea5m\/\u1ed1ng; bul\u00f4ng 316; tr\u00e1nh d\u00f9ng 201\/304 t\u1ea1i khu v\u1ef1c phun mu\u1ed1i \u2192 gi\u1ea3m r\u1ed7, gi\u1ea3m b\u1ea3o tr\u00ec.<\/p>\n<h2 id=\"toc-9-quy-cach-cung-ung-thong-dung\">Quy c\u00e1ch cung \u1ee9ng th\u00f4ng d\u1ee5ng<\/h2>\n<p>&#8211; Inox: Cu\u1ed9n\/t\u1ea5m 0,5\u20133,0 mm (2B\/BA), t\u1ea5m d\u00e0y 3\u201350 mm (No.1), \u1ed1ng h\u00e0n A312, h\u1ed9p \u0111\u1ecbnh h\u00ecnh, thanh \u0111\u1eb7c A276.<br \/>\n&#8211; Th\u00e9p th\u01b0\u1eddng: T\u1ea5m A36\/SS400 3\u201350 mm, th\u00e9p h\u00ecnh I\/H\/U\/L, \u1ed1ng \u0111en\/\u1ed1ng m\u1ea1 k\u1ebdm, tr\u00f2n \u0111\u1eb7c C45\/S45C.<\/p>\n<h2 id=\"toc-10-ket-luan-chon-dung-ngay-tu-buoc-thiet-ke\">K\u1ebft lu\u1eadn: Ch\u1ecdn \u0111\u00fang ngay t\u1eeb b\u01b0\u1edbc thi\u1ebft k\u1ebf<\/h2>\n<p>&#8211; Inox v\u01b0\u1ee3t tr\u1ed9i v\u1ec1 ch\u1ed1ng \u0103n m\u00f2n, th\u1ea9m m\u1ef9, v\u1ec7 sinh v\u00e0 chi ph\u00ed v\u00f2ng \u0111\u1eddi trong m\u00f4i tr\u01b0\u1eddng \u1ea9m\/\u0103n m\u00f2n ho\u1eb7c y\u00eau c\u1ea7u v\u1ec7 sinh. 304 l\u00e0 \u201cchu\u1ea9n \u0111a d\u1ee5ng\u201d, 316 cho m\u00f4i tr\u01b0\u1eddng mu\u1ed1i\/Cl\u2013, 201\/430 cho n\u1ed9i th\u1ea5t kh\u00f4\/gi\u00e1 t\u1ed1t.<br \/>\n&#8211; Th\u00e9p th\u01b0\u1eddng ph\u00f9 h\u1ee3p k\u1ebft c\u1ea5u ch\u1ecbu l\u1ef1c, chi ti\u1ebft c\u1ea7n x\u1eed l\u00fd nhi\u1ec7t v\u00e0 ng\u00e2n s\u00e1ch ban \u0111\u1ea7u th\u1ea5p, nh\u01b0ng ph\u1ea3i c\u00f3 gi\u1ea3i ph\u00e1p b\u1ea3o v\u1ec7 b\u1ec1 m\u1eb7t v\u00e0 k\u1ebf ho\u1ea1ch b\u1ea3o tr\u00ec.<br \/>\n&#8211; Quy t\u1eafc v\u00e0ng:<br \/>\n  1) X\u00e1c \u0111\u1ecbnh m\u00f4i tr\u01b0\u1eddng v\u00e0 v\u00f2ng \u0111\u1eddi.<br \/>\n  2) Ch\u1ecdn m\u00e1c theo \u0103n m\u00f2n tr\u01b0\u1edbc, r\u1ed3i t\u1ed1i \u01b0u c\u01a1 t\u00ednh.<br \/>\n  3) Thi\u1ebft k\u1ebf v\u00e0 thi c\u00f4ng \u0111\u00fang (h\u00e0n, b\u1ec1 m\u1eb7t, tho\u00e1t n\u01b0\u1edbc).<br \/>\nKhi \u00e1p d\u1ee5ng \u0111\u00fang, b\u1ea1n gi\u1ea3m r\u1ee7i ro g\u1ec9 s\u00e9t, t\u1ed1i \u01b0u t\u1ed5ng chi ph\u00ed, v\u00e0 \u0111\u1ea3m b\u1ea3o ch\u1ea5t l\u01b0\u1ee3ng c\u00f4ng tr\u00ecnh trong nhi\u1ec1u n\u0103m.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>So s\u00e1nh inox v\u00e0 th\u00e9p th\u01b0\u1eddng t\u1eeb A\u2013Z: th\u00e0nh ph\u1ea7n, ch\u1ed1ng \u0103n m\u00f2n, c\u01a1 t\u00ednh, nhi\u1ec7t, h\u00e0n, b\u1ec1 m\u1eb7t, chi ph\u00ed v\u00e0 \u1ee9ng d\u1ee5ng. H\u01b0\u1edbng d\u1eabn ch\u1ecdn v\u1eadt li\u1ec7u ch\u00ednh x\u00e1c.<\/p>\n","protected":false},"author":7,"featured_media":1044,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[23],"tags":[],"class_list":["post-1098","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\/1098","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=1098"}],"version-history":[{"count":0,"href":"https:\/\/inoxcuongthinh.com\/inct\/wp\/v2\/posts\/1098\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/inoxcuongthinh.com\/inct\/wp\/v2\/media\/1044"}],"wp:attachment":[{"href":"https:\/\/inoxcuongthinh.com\/inct\/wp\/v2\/media?parent=1098"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/inoxcuongthinh.com\/inct\/wp\/v2\/categories?post=1098"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/inoxcuongthinh.com\/inct\/wp\/v2\/tags?post=1098"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}