{"id":2030,"date":"2026-05-18T00:34:16","date_gmt":"2026-05-17T17:34:16","guid":{"rendered":"https:\/\/inoxcuongthinh.com\/xep-hang-kha-nang-chong-an-mon-cua-cac-mac-inox-pho-bien\/"},"modified":"2026-05-18T00:34:16","modified_gmt":"2026-05-17T17:34:16","slug":"xep-hang-kha-nang-chong-an-mon-cua-cac-mac-inox-pho-bien","status":"publish","type":"post","link":"https:\/\/inoxcuongthinh.com\/xep-hang-kha-nang-chong-an-mon-cua-cac-mac-inox-pho-bien\/","title":{"rendered":"X\u1ebfp h\u1ea1ng kh\u1ea3 n\u0103ng ch\u1ed1ng \u0103n m\u00f2n c\u1ee7a c\u00e1c m\u00e1c inox ph\u1ed5 bi\u1ebfn"},"content":{"rendered":"<div class=\"custom-toc\">\n<h3>N\u1ed9i dung ch\u00ednh<\/h3>\n<ul>\n<li><a href=\"#toc-0-nguyen-ly-xep-hang-pren-va-cac-yeu-to-thuc-dia\">Nguy\u00ean l\u00fd x\u1ebfp h\u1ea1ng: PREN v\u00e0 c\u00e1c y\u1ebfu t\u1ed1 th\u1ef1c \u0111\u1ecba<\/a><\/li>\n<li><a href=\"#toc-1-nguong-pren-khuyen-nghi-theo-moi-truong-su-dung\">Ng\u01b0\u1ee1ng PREN khuy\u1ebfn ngh\u1ecb theo m\u00f4i tr\u01b0\u1eddng s\u1eed d\u1ee5ng<\/a><\/li>\n<li><a href=\"#toc-2-bang-xep-hang-mac-inox-theo-kha-nang-chong-an-mon-\">B\u1ea3ng x\u1ebfp h\u1ea1ng m\u00e1c inox theo kh\u1ea3 n\u0103ng ch\u1ed1ng \u0103n m\u00f2n (t\u01b0\u01a1ng \u0111\u1ed1i)<\/a><\/li>\n<li><a href=\"#toc-3-xep-hang-chuyen-biet-theo-dang-an-mon\">X\u1ebfp h\u1ea1ng chuy\u00ean bi\u1ec7t theo d\u1ea1ng \u0103n m\u00f2n<\/a><\/li>\n<li><a href=\"#toc-4-vi-du-lua-chon-tai-viet-nam\">V\u00ed d\u1ee5 l\u1ef1a ch\u1ecdn t\u1ea1i Vi\u1ec7t Nam<\/a><\/li>\n<li><a href=\"#toc-5-cac-yeu-to-ngoai-thanh-phan-anh-huong-xep-hang-thu\">C\u00e1c y\u1ebfu t\u1ed1 ngo\u00e0i th\u00e0nh ph\u1ea7n \u1ea3nh h\u01b0\u1edfng x\u1ebfp h\u1ea1ng th\u1ef1c t\u1ebf<\/a><\/li>\n<li><a href=\"#toc-6-chi-phi-hieu-nang-tham-khao-thi-truong-viet-nam\">Chi ph\u00ed \u2013 hi\u1ec7u n\u0103ng (tham kh\u1ea3o th\u1ecb tr\u01b0\u1eddng Vi\u1ec7t Nam)<\/a><\/li>\n<li><a href=\"#toc-7-danh-muc-mac-inox-thong-dung-tai-ha-noi\">Danh m\u1ee5c m\u00e1c inox th\u00f4ng d\u1ee5ng t\u1ea1i H\u00e0 N\u1ed9i<\/a><\/li>\n<li><a href=\"#toc-8-nguon-tham-khao-chinh\">Ngu\u1ed3n tham kh\u1ea3o ch\u00ednh<\/a><\/li>\n<li><a href=\"#toc-9-ket-luan\">K\u1ebft lu\u1eadn<\/a><\/li>\n<\/ul>\n<\/div>\n<p>\u0110\u00e2y l\u00e0 h\u01b0\u1edbng d\u1eabn \u0111\u1ea7y \u0111\u1ee7 \u0111\u1ec3 b\u1ea1n x\u1ebfp h\u1ea1ng v\u00e0 ch\u1ecdn m\u00e1c inox theo kh\u1ea3 n\u0103ng ch\u1ed1ng \u0103n m\u00f2n, t\u1eadp trung v\u00e0o c\u00e1c m\u00e1c ph\u1ed5 bi\u1ebfn t\u1ea1i Vi\u1ec7t Nam. B\u00e0i vi\u1ebft \u0111\u1eb7t n\u1eb7ng kh\u00eda c\u1ea1nh k\u1ef9 thu\u1eadt, cung c\u1ea5p ng\u01b0\u1ee1ng PREN khuy\u1ebfn ngh\u1ecb theo m\u00f4i tr\u01b0\u1eddng, x\u1ebfp h\u1ea1ng theo t\u1eebng nh\u00f3m th\u00e9p v\u00e0 v\u00ed d\u1ee5 \u00e1p d\u1ee5ng th\u1ef1c t\u1ebf. Ch\u1ee7 \u0111\u1ec1 n\u00e0y l\u00e0 m\u1ed9t m\u1ea3nh gh\u00e9p then ch\u1ed1t trong b\u1ee9c tranh \u201cPh\u00e2n t\u00edch chuy\u00ean s\u00e2u v\u1ec1 c\u00e1c m\u00e1c inox ph\u1ed5 bi\u1ebfn\u201d.<\/p>\n<h2 id=\"toc-0-nguyen-ly-xep-hang-pren-va-cac-yeu-to-thuc-dia\">Nguy\u00ean l\u00fd x\u1ebfp h\u1ea1ng: PREN v\u00e0 c\u00e1c y\u1ebfu t\u1ed1 th\u1ef1c \u0111\u1ecba<\/h2>\n<p>&#8211; Ch\u1ec9 s\u1ed1 PREN (Pitting Resistance Equivalent Number) d\u00f9ng \u0111\u1ec3 so s\u00e1nh kh\u1ea3 n\u0103ng kh\u00e1ng r\u1ed7\/\u0103n m\u00f2n k\u1ebd h\u1edf trong m\u00f4i tr\u01b0\u1eddng ch\u1ee9a Cl- (mu\u1ed1i). C\u00f4ng th\u1ee9c ph\u1ed5 bi\u1ebfn: PREN = %Cr + 3.3\u00d7%Mo + 16\u00d7%N.<br \/>\n&#8211; \u00dd ngh\u0129a: PREN c\u00e0ng cao, kh\u00e1ng r\u1ed7 trong dung d\u1ecbch clorua c\u00e0ng t\u1ed1t (\u1edf c\u00f9ng \u0111i\u1ec1u ki\u1ec7n b\u1ec1 m\u1eb7t, nhi\u1ec7t \u0111\u1ed9, \u1ee9ng su\u1ea5t).<br \/>\n&#8211; H\u1ea1n ch\u1ebf: Ni kh\u00f4ng n\u1eb1m trong c\u00f4ng th\u1ee9c nh\u01b0ng v\u1eabn quan tr\u1ecdng \u0111\u1ec3 \u1ed5n \u0111\u1ecbnh t\u1ed5 ch\u1ee9c austenit; thi\u1ebft k\u1ebf, gia c\u00f4ng b\u1ec1 m\u1eb7t, h\u00e0n, nhi\u1ec7t \u0111\u1ed9, \u1ee9ng su\u1ea5t, hi\u1ec7n t\u01b0\u1ee3ng b\u1ea9n b\u1ec1 m\u1eb7t \u1ea3nh h\u01b0\u1edfng m\u1ea1nh \u0111\u1ebfn k\u1ebft qu\u1ea3 th\u1ef1c t\u1ebf.<\/p>\n<p>C\u00e1c d\u1ea1ng \u0103n m\u00f2n th\u01b0\u1eddng g\u1eb7p:<br \/>\n&#8211; R\u1ed7\/k\u1ebd h\u1edf (pitting\/crevice): ph\u1ee5 thu\u1ed9c m\u1ea1nh v\u00e0o Cl-, Mo, N v\u00e0 thi\u1ebft k\u1ebf ch\u1ed1ng t\u00edch t\u1ee5 mu\u1ed1i.<br \/>\n&#8211; \u0102n m\u00f2n \u1ee9ng su\u1ea5t Cl- (SCC): austenit nh\u1ea1y \u1edf nhi\u1ec7t \u0111\u1ed9 >60\u00b0C; ferrit v\u00e0 duplex kh\u00e1ng t\u1ed1t h\u01a1n.<br \/>\n&#8211; \u0102n m\u00f2n li\u00ean k\u1ebft h\u1ea1t (IGC): ch\u1ecdn m\u00e1c L (h\u00e0m l\u01b0\u1ee3ng C th\u1ea5p) ho\u1eb7c m\u00e1c \u1ed5n \u0111\u1ecbnh h\u00f3a Ti\/Nb nh\u01b0 321\/347; x\u1eed l\u00fd sau h\u00e0n \u0111\u00fang quy tr\u00ecnh.<br \/>\n&#8211; \u0102n m\u00f2n t\u1ed5ng th\u1ec3 trong axit: ph\u1ee5 thu\u1ed9c b\u1ea3n ch\u1ea5t axit (oxy h\u00f3a hay kh\u1eed). V\u00ed d\u1ee5: HNO3 th\u00edch 304\/304L; H2SO4 c\u1ea7n 904L\/6Mo.<\/p>\n<h2 id=\"toc-1-nguong-pren-khuyen-nghi-theo-moi-truong-su-dung\">Ng\u01b0\u1ee1ng PREN khuy\u1ebfn ngh\u1ecb theo m\u00f4i tr\u01b0\u1eddng s\u1eed d\u1ee5ng<\/h2>\n<p>Tham chi\u1ebfu khung ph\u00e2n lo\u1ea1i m\u00f4i tr\u01b0\u1eddng ISO 9223 (C1\u2013C5) v\u00e0 kinh nghi\u1ec7m hi\u1ec7n tr\u01b0\u1eddng:<br \/>\n&#8211; Trong nh\u00e0 kh\u00f4 r\u00e1o (C1\u2013C2): PREN \u2265 17. H\u1ea7u h\u1ebft 430\/439\/441\/304\/201 \u0111\u1ec1u d\u00f9ng \u0111\u01b0\u1ee3c n\u1ebfu b\u1ec1 m\u1eb7t s\u1ea1ch, \u00edt nhi\u1ec5m b\u1ea9n.<br \/>\n&#8211; Ngo\u00e0i tr\u1eddi \u0111\u00f4 th\u1ecb, xa bi\u1ec3n (C2\u2013C3): PREN \u2265 18\u201320. 304\/304L, 441\/439 \u0111\u1ea1t; 201 n\u00ean th\u1eadn tr\u1ecdng \u1edf khu c\u00f4ng nghi\u1ec7p \u1ea9m.<br \/>\n&#8211; Ven bi\u1ec3n, s\u01b0\u01a1ng mu\u1ed1i, phun n\u01b0\u1edbc m\u1eb7n (C4): PREN \u2265 24. T\u1ed1i thi\u1ec3u 316\/316L ho\u1eb7c ferrit 444; thi\u1ebft k\u1ebf tr\u00e1nh k\u1ebd h\u1edf.<br \/>\n&#8211; V\u00f9ng b\u1eafn t\u00f3e th\u1ee7y tri\u1ec1u, n\u01b0\u1edbc m\u1eb7n \u1ea5m, h\u1ed3 b\u01a1i n\u01b0\u1edbc m\u1eb7n, nhi\u1ec7t \u0111\u1ed9 >40\u201360\u00b0C (C5, kh\u1eafc nghi\u1ec7t): PREN \u2265 32. \u01afu ti\u00ean 2205, 904L ho\u1eb7c 6Mo\/2507.<br \/>\n&#8211; M\u00f4i tr\u01b0\u1eddng c\u00f3 SCC-Cl \u1edf nhi\u1ec7t \u0111\u1ed9 cao: \u01b0u ti\u00ean duplex\/ferrit (2205, 2507, 444); h\u1ea1n ch\u1ebf austenit th\u00f4ng th\u01b0\u1eddng.<\/p>\n<p>L\u01b0u \u00fd: C\u00e1c ng\u01b0\u1ee1ng tr\u00ean gi\u1ea3 \u0111\u1ecbnh b\u1ec1 m\u1eb7t ho\u00e0n thi\u1ec7n 2B\/No.4 s\u1ea1ch, h\u00e0n v\u00e0 x\u1eed l\u00fd th\u1ee5 \u0111\u1ed9ng \u0111\u00fang quy tr\u00ecnh. B\u1ec1 m\u1eb7t x\u01b0\u1edbc, b\u1ea9n, v\u00f9ng h\u00e0n ch\u01b0a t\u1ea9y g\u1ec9 s\u1ebd gi\u1ea3m b\u1eadc ch\u1ed1ng \u0103n m\u00f2n th\u1ef1c t\u1ebf.<\/p>\n<h2 id=\"toc-2-bang-xep-hang-mac-inox-theo-kha-nang-chong-an-mon-\">B\u1ea3ng x\u1ebfp h\u1ea1ng m\u00e1c inox theo kh\u1ea3 n\u0103ng ch\u1ed1ng \u0103n m\u00f2n (t\u01b0\u01a1ng \u0111\u1ed1i)<\/h2>\n<p>X\u1ebfp h\u1ea1ng theo d\u1ea3i PREN \u0111i\u1ec3n h\u00ecnh v\u00e0 hi\u1ec7u n\u0103ng th\u1ef1c \u0111\u1ecba. C\u00e1c m\u1ee9c d\u01b0\u1edbi \u0111\u00e2y mang t\u00ednh \u0111\u1ecbnh h\u01b0\u1edbng \u0111\u1ec3 ch\u1ecdn v\u1eadt li\u1ec7u:<\/p>\n<p>&#8211; C\u1ea5p 1 \u2013 C\u1ef1c cao (PREN \u2265 40)<br \/>\n  &#8211; 254SMO (UNS S31254, 6Mo): PREN ~42\u201345. D\u00f9ng cho n\u01b0\u1edbc bi\u1ec3n, h\u00f3a ch\u1ea5t clorua n\u00f3ng, kh\u1eed m\u1eb7n.<br \/>\n  &#8211; Super duplex 2507\/ZS32750\/ZS32760: PREN ~40\u201343. R\u1ea5t b\u1ec1n r\u1ed7\/k\u1ebd h\u1edf, SCC t\u1ed1t, c\u01a1 t\u00ednh cao.<br \/>\n  \u1ee8ng d\u1ee5ng: v\u00f9ng th\u1ee7y tri\u1ec1u, thi\u1ebft b\u1ecb n\u01b0\u1edbc bi\u1ec3n, d\u00e0n bay h\u01a1i, trao \u0111\u1ed5i nhi\u1ec7t n\u01b0\u1edbc m\u1eb7n.<\/p>\n<p>&#8211; C\u1ea5p 2 \u2013 R\u1ea5t cao (PREN 32\u201339)<br \/>\n  &#8211; Duplex 2205 (UNS S32205\/S31803): PREN ~34\u201336. Kh\u00e1ng r\u1ed7 t\u1ed1t h\u01a1n 316L, kh\u00e1ng SCC v\u01b0\u1ee3t tr\u1ed9i.<br \/>\n  &#8211; 904L (N08904): PREN ~35\u201336. Ch\u1ecbu H2SO4 lo\u00e3ng t\u1ed1t, kh\u00e1ng Cl- cao h\u01a1n 316L.<br \/>\n  \u1ee8ng d\u1ee5ng: ven bi\u1ec3n kh\u1eafc nghi\u1ec7t, b\u1ed3n dung d\u1ecbch m\u1eb7n \u1ea5m, th\u1ef1c ph\u1ea9m m\u1eb7n, h\u00f3a ch\u1ea5t c\u00f3 Cl-.<\/p>\n<p>&#8211; C\u1ea5p 3 \u2013 Cao (PREN 24\u201331)<br \/>\n  &#8211; 316\/316L\/316Ti: PREN ~24\u201326. Chu\u1ea9n v\u00e0ng cho m\u00f4i tr\u01b0\u1eddng c\u00f3 mu\u1ed1i nh\u1eb9 \u0111\u1ebfn trung b\u00ecnh.<br \/>\n  &#8211; 317L: PREN ~29\u201331 (t\u00f9y th\u00e0nh ph\u1ea7n). N\u00e2ng c\u1ea5p khi 316L b\u1eaft \u0111\u1ea7u r\u1ed7.<br \/>\n  &#8211; Ferrit 444: PREN ~24\u201326. Hi\u1ec7u n\u0103ng r\u1ed7 t\u01b0\u01a1ng \u0111\u01b0\u01a1ng 316L, kh\u00e1ng SCC t\u1ed1t, gi\u00e1 d\u1ec5 ch\u1ecbu h\u01a1n 316L.<br \/>\n  \u1ee8ng d\u1ee5ng: h\u1ea3i gi\u00f3 nh\u1eb9\u2013trung b\u00ecnh, thi\u1ebft b\u1ecb n\u01b0\u1edbc n\u00f3ng ch\u1ee9a Cl-, b\u1ed3n\/\u1ed1ng c\u00f4ng nghi\u1ec7p th\u1ef1c ph\u1ea9m m\u1eb7n nh\u1eb9.<\/p>\n<p>&#8211; C\u1ea5p 4 \u2013 Trung b\u00ecnh (PREN 18\u201323)<br \/>\n  &#8211; 304\/304L\/321\/347: PREN ~18\u201319. T\u1ed5ng qu\u00e1t, kh\u00f4ng ph\u00f9 h\u1ee3p v\u00f9ng mu\u1ed1i; c\u1ea7n b\u1ea3o tr\u00ec n\u1ebfu ven bi\u1ec3n.<br \/>\n  &#8211; Ferrit 430\/439\/441: PREN ~16\u201319. D\u00f9ng n\u1ed9i th\u1ea5t, m\u00f4i tr\u01b0\u1eddng kh\u00f4; 441 \u1ed5n \u0111\u1ecbnh h\u01a1n nh\u1edd Ti\/Nb.<br \/>\n  &#8211; 201\/202: PREN t\u00ednh to\u00e1n c\u00f3 th\u1ec3 18\u201319 nh\u1edd N, nh\u01b0ng hi\u1ec7u n\u0103ng th\u1ef1c t\u1ebf th\u01b0\u1eddng k\u00e9m 304 trong Cl- do Ni th\u1ea5p, Mn cao v\u00e0 \u1ed5n \u0111\u1ecbnh t\u1ed5 ch\u1ee9c k\u00e9m. Tr\u00e1nh d\u00f9ng g\u1ea7n bi\u1ec3n.<br \/>\n  \u1ee8ng d\u1ee5ng: \u0111\u1ed3 gia d\u1ee5ng, n\u1ed9i th\u1ea5t, nh\u00e0 x\u01b0\u1edfng kh\u00f4, \u1ed1ng trang tr\u00ed trong nh\u00e0.<\/p>\n<p>&#8211; C\u1ea5p 5 \u2013 Th\u1ea5p (PREN < 18)\n  - 409\/410\/420, 430 h\u00e0m l\u01b0\u1ee3ng Cr th\u1ea5p: PREN ~11\u201317. \u01afu ti\u00ean cho ch\u1ecbu nhi\u1ec7t kh\u00f4, chi ti\u1ebft \u00edt quan tr\u1ecdng v\u1ec1 ch\u1ed1ng r\u1ec9, kh\u00f4ng c\u00f3 mu\u1ed1i.\n  \u1ee8ng d\u1ee5ng: \u1ed1ng x\u1ea3, k\u1ebft c\u1ea5u trong nh\u00e0 r\u1ea5t kh\u00f4, linh ki\u1ec7n c\u01a1 kh\u00ed c\u1ea7n t\u00f4i c\u1ee9ng (martensit).\n\n\n\n<h3>X\u1ebfp h\u1ea1ng theo nh\u00f3m th\u00e9p<\/h3>\n<p>&#8211; Austenit: 201\/202 < 304\/304L \u2248 321\/347 < 316\/316L < 317L < 904L < 254SMO.\n- Ferrit: 409 < 430 \u2248 439\/441 < 444.\n- Duplex: 2101\/2304 (lean) < 2205 (standard) < 2507\/ZS32760 (super).\n- Martensit &#038; PH: 410\/420\/431\/17-4PH th\u01b0\u1eddng kh\u00f4ng ph\u1ea3i l\u1ef1a ch\u1ecdn \u01b0u ti\u00ean cho Cl- \u1ea9m.\n\n\n\n<h2 id=\"toc-3-xep-hang-chuyen-biet-theo-dang-an-mon\">X\u1ebfp h\u1ea1ng chuy\u00ean bi\u1ec7t theo d\u1ea1ng \u0103n m\u00f2n<\/h2>\n<p>&#8211; R\u1ed7\/k\u1ebd h\u1edf trong Cl-:<br \/>\n  254SMO \u2248 2507 > 2205 \u2248 904L > 317L > 316L \u2248 444 > 304L \u2248 441\/439 > 430 > 201.<br \/>\n&#8211; SCC do Cl- (nhi\u1ec7t \u0111\u1ed9 >60\u00b0C, t\u1ea3i k\u00e9o):<br \/>\n  Ferrit (444) \u2248 Duplex (2205\/2507) kh\u00e1ng r\u1ea5t t\u1ed1t > Austenit Mo cao (904L, 317L, 316L) > Austenit th\u01b0\u1eddng (304L, 201) k\u00e9m.<br \/>\n&#8211; IGC sau h\u00e0n:<br \/>\n  L-grades (304L\/316L) v\u00e0 m\u00e1c \u1ed5n \u0111\u1ecbnh Ti\/Nb (321\/347) t\u1ed1t h\u01a1n m\u00e1c carbon cao; c\u1ea7n t\u1ea9y g\u1ec9-th\u1ee5 \u0111\u1ed9ng sau h\u00e0n.<br \/>\n&#8211; Axit \u0111i\u1ec3n h\u00ecnh:<br \/>\n  HNO3: 304\/304L ho\u1ea1t \u0111\u1ed9ng r\u1ea5t t\u1ed1t; 430 c\u0169ng \u1ed5n trong m\u1ed9t s\u1ed1 n\u1ed3ng \u0111\u1ed9.<br \/>\n  H2SO4 lo\u00e3ng\u2013trung b\u00ecnh: 904L, 254SMO v\u01b0\u1ee3t tr\u1ed9i; 316L ch\u1ec9 ph\u00f9 h\u1ee3p n\u1ed3ng \u0111\u1ed9 th\u1ea5p, nhi\u1ec7t \u0111\u1ed9 th\u1ea5p.<br \/>\n  HCl: \u0111a s\u1ed1 inox th\u00f4ng d\u1ee5ng kh\u00f4ng b\u1ec1n; d\u00f9ng 6Mo\/Si cao, v\u1eadt li\u1ec7u \u0111\u1eb7c bi\u1ec7t, ho\u1eb7c l\u00f3t.<\/p>\n<h2 id=\"toc-4-vi-du-lua-chon-tai-viet-nam\">V\u00ed d\u1ee5 l\u1ef1a ch\u1ecdn t\u1ea1i Vi\u1ec7t Nam<\/h2>\n<p>&#8211; Lan can, \u1ed1p ngo\u00e0i tr\u1eddi s\u00e1t bi\u1ec3n (\u0110\u00e0 N\u1eb5ng, Nha Trang, H\u1ea3i Ph\u00f2ng):<br \/>\n  \u01afu ti\u00ean 2205. 316L ch\u1ec9 d\u00f9ng khi ch\u1ea5p nh\u1eadn v\u1ec7 sinh \u0111\u1ecbnh k\u1ef3, thi\u1ebft k\u1ebf tho\u00e1t n\u01b0\u1edbc t\u1ed1t. Tr\u00e1nh 304\/201.<br \/>\n&#8211; B\u1ed3n mu\u1ed1i, n\u01b0\u1edbc m\u1eafm, th\u1ee7y s\u1ea3n 3\u20135% NaCl \u1edf 25\u201340\u00b0C:<br \/>\n  316L t\u1ed1i thi\u1ec3u; n\u1ebfu c\u00f3 \u0111i\u1ec3m \u0111\u1ecdng mu\u1ed1i\/nhi\u1ec7t cao, c\u00e2n nh\u1eafc 2205 ho\u1eb7c 904L. Tr\u00e1nh k\u1ebd h\u1edf, d\u00f9ng m\u1ed1i h\u00e0n k\u00edn, t\u1ea9y g\u1ec9-th\u1ee5 \u0111\u1ed9ng.<br \/>\n&#8211; H\u1ec7 RO, n\u01b0\u1edbc bi\u1ec3n, b\u01a1m\/\u0111\u01b0\u1eddng \u1ed1ng mu\u1ed1i:<br \/>\n  2205 cho \u0111\u01b0\u1eddng \u1ed1ng, 254SMO\/2507 cho v\u00f9ng b\u1eafn t\u00f3e. 316L ch\u1ec9 d\u00f9ng n\u01b0\u1edbc c\u1ea5p \u00edt Cl-.<br \/>\n&#8211; Thi\u1ebft b\u1ecb n\u01b0\u1edbc n\u00f3ng c\u00f3 Clo (boiler, b\u00ecnh n\u01b0\u1edbc n\u00f3ng c\u00f4ng nghi\u1ec7p):<br \/>\n  444 ho\u1eb7c 316L; 444 kh\u00e1ng SCC t\u1ed1t, chi ph\u00ed th\u1ea5p h\u01a1n 316L.<br \/>\n&#8211; Th\u1ef1c ph\u1ea9m, \u0111\u1ed3 u\u1ed1ng, s\u1eefa trong nh\u00e0 x\u01b0\u1edfng H\u00e0 N\u1ed9i:<br \/>\n  304L \u0111\u1ee7 d\u00f9ng; y\u00eau c\u1ea7u h\u00e0n chu\u1ea9n, th\u1ee5 \u0111\u1ed9ng h\u00f3a theo ASTM A967, v\u1ec7 sinh \u0111\u1ecbnh k\u1ef3.<br \/>\n&#8211; M\u00f4i tr\u01b0\u1eddng c\u00f3 H2SO4 lo\u00e3ng (m\u1ea1, ph\u00e2n b\u00f3n):<br \/>\n  904L ho\u1eb7c 254SMO. 316L d\u1ec5 b\u1ecb \u0103n m\u00f2n t\u1ed5ng th\u1ec3.<\/p>\n<h2 id=\"toc-5-cac-yeu-to-ngoai-thanh-phan-anh-huong-xep-hang-thu\">C\u00e1c y\u1ebfu t\u1ed1 ngo\u00e0i th\u00e0nh ph\u1ea7n \u1ea3nh h\u01b0\u1edfng x\u1ebfp h\u1ea1ng th\u1ef1c t\u1ebf<\/h2>\n<p>&#8211; Ho\u00e0n thi\u1ec7n b\u1ec1 m\u1eb7t: BA\/electropolish > 2B > No.4 > b\u1ec1 m\u1eb7t th\u00f4. \u0110\u1ed9 nh\u00e1m th\u1ea5p gi\u1ea3m r\u1ed7.<br \/>\n&#8211; H\u00e0n: lo\u1ea1i b\u1ecf m\u00e0u nhi\u1ec7t (heat tint), t\u1ea9y g\u1ec9-th\u1ee5 \u0111\u1ed9ng (A380\/A967), ch\u1ecdn 304L\/316L ho\u1eb7c 321\/347 khi c\u00f3 chu tr\u00ecnh nhi\u1ec7t.<br \/>\n&#8211; Nhi\u1ec5m s\u1eaft t\u1ef1 do: tr\u00e1nh \u0111\u00e1nh x\u01b0\u1edbc b\u1eb1ng d\u1ee5ng c\u1ee5 th\u00e9p carbon; th\u1ee5 \u0111\u1ed9ng h\u00f3a sau gia c\u00f4ng.<br \/>\n&#8211; Thi\u1ebft k\u1ebf: tr\u00e1nh k\u1ebd h\u1edf, \u1ee9 \u0111\u1ecdng mu\u1ed1i; t\u1ea1o tho\u00e1t n\u01b0\u1edbc; d\u00f9ng gio\u0103ng ch\u1ecbu Cl-; tr\u00e1nh b\u1eaby b\u1ea9n.<br \/>\n&#8211; \u0102n m\u00f2n \u0111i\u1ec7n ly: c\u00e1ch ly inox v\u1edbi th\u00e9p carbon\/nh\u00f4m trong m\u00f4i tr\u01b0\u1eddng \u1ea9m (\u0111\u1ec7m c\u00e1ch \u0111i\u1ec7n, s\u01a1n).<br \/>\n&#8211; Nhi\u1ec7t \u0111\u1ed9: t\u0103ng nhi\u1ec7t l\u00e0m gi\u1ea3m ng\u01b0\u1ee1ng r\u1ed7; ki\u1ec3m so\u00e1t \u0111\u1ec3 duy tr\u00ec c\u1ea5p ch\u1ed1ng \u0103n m\u00f2n k\u1ef3 v\u1ecdng.<\/p>\n<h2 id=\"toc-6-chi-phi-hieu-nang-tham-khao-thi-truong-viet-nam\">Chi ph\u00ed \u2013 hi\u1ec7u n\u0103ng (tham kh\u1ea3o th\u1ecb tr\u01b0\u1eddng Vi\u1ec7t Nam)<\/h2>\n<p>So v\u1edbi 304L (=1.0 v\u1ec1 gi\u00e1 t\u01b0\u01a1ng \u0111\u1ed1i):<br \/>\n&#8211; 201: ~0.7\u20130.85, nh\u01b0ng r\u1ee7i ro r\u1ec9 n\u00e2u cao trong Cl-.<br \/>\n&#8211; 316L: ~1.3\u20131.5, hi\u1ec7u n\u0103ng v\u01b0\u1ee3t tr\u1ed9i \u1edf m\u00f4i tr\u01b0\u1eddng m\u1eb7n nh\u1eb9\u2013trung b\u00ecnh.<br \/>\n&#8211; 444: ~1.1\u20131.3, hi\u1ec7u n\u0103ng r\u1ed7 t\u01b0\u01a1ng \u0111\u01b0\u01a1ng 316L, kh\u00e1ng SCC t\u1ed1t.<br \/>\n&#8211; 2205: ~1.8\u20132.2, t\u0103ng m\u1ea1nh \u0111\u1ed9 b\u1ec1n r\u1ed7 v\u00e0 SCC.<br \/>\n&#8211; 904L: ~2.5\u20133.0; 254SMO\/2507: >3.0. D\u00f9ng khi m\u00f4i tr\u01b0\u1eddng th\u1ef1c s\u1ef1 kh\u1eafc nghi\u1ec7t.<br \/>\nGi\u00e1 bi\u1ebfn \u0111\u1ed9ng theo th\u1eddi \u0111i\u1ec3m, ti\u00eau chu\u1ea9n, b\u1ec1 m\u1eb7t v\u00e0 ngu\u1ed3n cung.<\/p>\n<h2 id=\"toc-7-danh-muc-mac-inox-thong-dung-tai-ha-noi\">Danh m\u1ee5c m\u00e1c inox th\u00f4ng d\u1ee5ng t\u1ea1i H\u00e0 N\u1ed9i<\/h2>\n<p>&#8211; D\u1ea1ng t\u1ea5m\/cu\u1ed9n: 201, 304\/304L, 316\/316L, 430, 444; \u0111\u1eb7t h\u00e0ng: 2205, 904L, 254SMO.<br \/>\n&#8211; \u1ed0ng c\u00f4ng nghi\u1ec7p ASTM A312, \u1ed1ng trang tr\u00ed ASTM A554; thanh tr\u00f2n A276; t\u1ea5m A240.<br \/>\n&#8211; B\u1ec1 m\u1eb7t: 2B, BA, No.4, HL; \u0111\u1ed9 d\u00e0y ph\u1ed5 bi\u1ebfn 0.5\u201312 mm (t\u00f9y m\u00e1c).<\/p>\n<h2 id=\"toc-8-nguon-tham-khao-chinh\">Ngu\u1ed3n tham kh\u1ea3o ch\u00ednh<\/h2>\n<p>&#8211; Nickel Institute, Corrosion Resistance tables and Technical Series. https:\/\/nickelinstitute.org<br \/>\n&#8211; Outokumpu Corrosion Handbook; Datasheets for 304\/316\/444\/2205\/2507. https:\/\/www.outokumpu.com<br \/>\n&#8211; ASTM A240, A312, A276; ASTM A380\/A967 (l\u00e0m s\u1ea1ch, th\u1ee5 \u0111\u1ed9ng h\u00f3a).<br \/>\n&#8211; ISO 9223:2012 Corrosion of metals and alloys \u2013 Classification of corrosivity of atmospheres.<br \/>\n&#8211; NACE MR0175\/ISO 15156 (v\u1eadt li\u1ec7u cho m\u00f4i tr\u01b0\u1eddng H2S).<br \/>\n&#8211; Atlas Steels Technical Handbook of Stainless Steels. https:\/\/www.atlassteels.com.au<\/p>\n<h2 id=\"toc-9-ket-luan\">K\u1ebft lu\u1eadn<\/h2>\n<p>&#8211; PREN l\u00e0 th\u01b0\u1edbc \u0111o nhanh \u0111\u1ec3 x\u1ebfp h\u1ea1ng kh\u00e1ng r\u1ed7: 316\/444 (PREN ~24\u201326) l\u00e0 ng\u01b0\u1ee1ng an to\u00e0n t\u1ed1i thi\u1ec3u cho v\u00f9ng c\u00f3 mu\u1ed1i; 2205\/904L cho m\u00f4i tr\u01b0\u1eddng kh\u1eafc nghi\u1ec7t; 254SMO\/2507 cho n\u01b0\u1edbc bi\u1ec3n tr\u1ef1c ti\u1ebfp.<br \/>\n&#8211; 304\/201 ch\u1ec9 ph\u00f9 h\u1ee3p m\u00f4i tr\u01b0\u1eddng kh\u00f4, xa mu\u1ed1i; d\u00f9ng ven bi\u1ec3n s\u1ebd s\u1edbm r\u1ec9 n\u00e2u n\u1ebfu kh\u00f4ng b\u1ea3o tr\u00ec nghi\u00eam ng\u1eb7t.<br \/>\n&#8211; Quy\u1ebft \u0111\u1ecbnh \u0111\u00fang m\u00e1c c\u1ea7n x\u00e9t \u0111\u1ed3ng th\u1eddi m\u00f4i tr\u01b0\u1eddng (Cl-, nhi\u1ec7t), thi\u1ebft k\u1ebf (k\u1ebd h\u1edf), b\u1ec1 m\u1eb7t, quy tr\u00ecnh h\u00e0n v\u00e0 ng\u00e2n s\u00e1ch.<br \/>\nC\u1ea7n t\u01b0 v\u1ea5n m\u00e1c inox, ti\u00eau chu\u1ea9n v\u1eadt li\u1ec7u v\u00e0 b\u00e1o gi\u00e1 t\u1ed1i \u01b0u cho d\u1ef1 \u00e1n t\u1ea1i Vi\u1ec7t Nam? Li\u00ean h\u1ec7 Inox C\u01b0\u1eddng Th\u1ecbnh \u2013 Hotline: 0343.417.281. Email: inoxcongnghiep.cuongthinh@gmail.com<\/p>\n","protected":false},"excerpt":{"rendered":"<p>So s\u00e1nh, x\u1ebfp h\u1ea1ng inox 201, 304\/304L, 316\/316L, 430, 444, 2205, 904L, 254SMO theo PREN v\u00e0 m\u00f4i tr\u01b0\u1eddng s\u1eed d\u1ee5ng. G\u1ee3i \u00fd ch\u1ecdn m\u00e1c ph\u00f9 h\u1ee3p t\u1ea1i Vi\u1ec7t Nam.<\/p>\n","protected":false},"author":7,"featured_media":1069,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[23],"tags":[],"class_list":["post-2030","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\/2030","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=2030"}],"version-history":[{"count":0,"href":"https:\/\/inoxcuongthinh.com\/inct\/wp\/v2\/posts\/2030\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/inoxcuongthinh.com\/inct\/wp\/v2\/media\/1069"}],"wp:attachment":[{"href":"https:\/\/inoxcuongthinh.com\/inct\/wp\/v2\/media?parent=2030"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/inoxcuongthinh.com\/inct\/wp\/v2\/categories?post=2030"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/inoxcuongthinh.com\/inct\/wp\/v2\/tags?post=2030"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}