{"id":1554,"date":"2026-01-15T00:38:20","date_gmt":"2026-01-14T17:38:20","guid":{"rendered":"https:\/\/inoxcuongthinh.com\/inox-va-thep-thuong-khac-nhau-the-nao-so-sanh-a-z-thuc-dung\/"},"modified":"2026-01-15T00:38:20","modified_gmt":"2026-01-14T17:38:20","slug":"inox-va-thep-thuong-khac-nhau-the-nao-so-sanh-a-z-thuc-dung","status":"publish","type":"post","link":"https:\/\/inoxcuongthinh.com\/inox-va-thep-thuong-khac-nhau-the-nao-so-sanh-a-z-thuc-dung\/","title":{"rendered":"Inox v\u00e0 th\u00e9p th\u01b0\u1eddng kh\u00e1c nhau th\u1ebf n\u00e0o? So s\u00e1nh A\u2013Z th\u1ef1c d\u1ee5ng"},"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-vs-thep-thuong\">\u0110\u1ecbnh ngh\u0129a nhanh: Inox vs Th\u00e9p th\u01b0\u1eddng<\/a><\/li>\n<li><a href=\"#toc-1-so-sanh-cot-loi-theo-tieu-chi-ky-thuat\">So s\u00e1nh c\u1ed1t l\u00f5i theo ti\u00eau ch\u00ed k\u1ef9 thu\u1eadt<\/a><\/li>\n<li><a href=\"#toc-2-ung-dung-tieu-bieu-o-viet-nam\">\u1ee8ng d\u1ee5ng ti\u00eau bi\u1ec3u \u1edf Vi\u1ec7t Nam<\/a><\/li>\n<li><a href=\"#toc-3-chi-phi-gia-ban-dau-vs-chi-phi-vong-doi\">Chi ph\u00ed: Gi\u00e1 ban \u0111\u1ea7u vs chi ph\u00ed v\u00f2ng \u0111\u1eddi<\/a><\/li>\n<li><a href=\"#toc-4-nhan-dien-nhanh-ngoai-cong-truong\">Nh\u1eadn di\u1ec7n nhanh ngo\u00e0i c\u00f4ng tr\u01b0\u1eddng<\/a><\/li>\n<li><a href=\"#toc-5-tieu-chuan-mac-pho-bien-tuong-duong\">Ti\u00eau chu\u1ea9n &#038; m\u00e1c ph\u1ed5 bi\u1ebfn t\u01b0\u01a1ng \u0111\u01b0\u01a1ng<\/a><\/li>\n<li><a href=\"#toc-6-huong-dan-chon-vat-lieu-theo-moi-truong-lam-viec\">H\u01b0\u1edbng d\u1eabn ch\u1ecdn v\u1eadt li\u1ec7u theo m\u00f4i tr\u01b0\u1eddng l\u00e0m vi\u1ec7c<\/a><\/li>\n<li><a href=\"#toc-7-cac-loi-chon-vat-lieu-thuong-gap\">C\u00e1c l\u1ed7i ch\u1ecdn v\u1eadt li\u1ec7u th\u01b0\u1eddng g\u1eb7p<\/a><\/li>\n<li><a href=\"#toc-8-cau-hoi-nhanh\">C\u00e2u h\u1ecfi nhanh<\/a><\/li>\n<li><a href=\"#toc-9-nguon-tham-khao\">Ngu\u1ed3n tham kh\u1ea3o<\/a><\/li>\n<li><a href=\"#toc-10-ket-luan\">K\u1ebft lu\u1eadn<\/a><\/li>\n<\/ul>\n<\/div>\n<p>Inox (th\u00e9p kh\u00f4ng g\u1ec9) v\u00e0 th\u00e9p th\u01b0\u1eddng l\u00e0 hai nh\u00f3m v\u1eadt li\u1ec7u kim lo\u1ea1i n\u1ec1n s\u1eaft \u0111\u01b0\u1ee3c d\u00f9ng r\u1ed9ng r\u00e3i nh\u1ea5t trong c\u00f4ng nghi\u1ec7p v\u00e0 x\u00e2y d\u1ef1ng. Hi\u1ec3u \u0111\u00fang kh\u00e1c bi\u1ec7t c\u1ed1t l\u00f5i gi\u00fap k\u1ef9 s\u01b0, nh\u00e0 th\u1ea7u v\u00e0 x\u01b0\u1edfng c\u01a1 kh\u00ed ch\u1ecdn \u0111\u00fang v\u1eadt li\u1ec7u ngay t\u1eeb \u0111\u1ea7u, t\u1ed1i \u01b0u chi ph\u00ed v\u00f2ng \u0111\u1eddi v\u00e0 \u0111\u1ed9 b\u1ec1n. B\u00e0i vi\u1ebft n\u00e0y l\u00e0 h\u01b0\u1edbng d\u1eabn A\u2013Z, \u0111\u1ed9c l\u1eadp v\u00e0 \u0111\u1ea7y \u0111\u1ee7, trong chu\u1ed7i \u201cKi\u1ebfn th\u1ee9c n\u1ec1n t\u1ea3ng v\u1ec1 th\u00e9p kh\u00f4ng g\u1ec9\u201d.<\/p>\n<h2 id=\"toc-0-dinh-nghia-nhanh-inox-vs-thep-thuong\">\u0110\u1ecbnh ngh\u0129a nhanh: Inox vs Th\u00e9p th\u01b0\u1eddng<\/h2>\n<p>&#8211; Inox: H\u1ee3p kim s\u1eaft ch\u1ee9a t\u1ed1i thi\u1ec3u 10,5% Cr (chrom) t\u1ea1o l\u1edbp m\u00e0ng th\u1ee5 \u0111\u1ed9ng Cr2O3 t\u1ef1 ph\u1ee5c h\u1ed3i, cho kh\u1ea3 n\u0103ng ch\u1ed1ng \u0103n m\u00f2n v\u01b0\u1ee3t tr\u1ed9i. Nh\u00f3m ch\u00ednh: Austenitic (304, 316, 201), Ferritic (430), Martensitic (410, 420), Duplex (2205). Chu\u1ea9n hay g\u1eb7p: ASTM A240 (t\u1ea5m), ASTM A312 (\u1ed1ng).<br \/>\n&#8211; Th\u00e9p th\u01b0\u1eddng (carbon\/th\u00e9p h\u1ee3p kim th\u1ea5p): H\u00e0m l\u01b0\u1ee3ng C \u0111i\u1ec3n h\u00ecnh 0,05\u20130,30% (th\u00e9p cacbon th\u1ea5p) v\u00e0 c\u00e1c nguy\u00ean t\u1ed1 h\u1ee3p kim th\u1ea5p. 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. M\u00e1c ph\u1ed5 bi\u1ebfn: A36, SS400, Q235, CT3; \u1ed1ng: ASTM A53\/A106, th\u00e9p h\u1ed9p: ASTM A500.<\/p>\n<h2 id=\"toc-1-so-sanh-cot-loi-theo-tieu-chi-ky-thuat\">So s\u00e1nh c\u1ed1t l\u00f5i theo ti\u00eau ch\u00ed k\u1ef9 thu\u1eadt<\/h2>\n<h3>1) Th\u00e0nh ph\u1ea7n &#038; vi c\u1ea5u tr\u00fac<\/h3>\n<p>&#8211; Inox:<br \/>\n  &#8211; T\u1ed1i thi\u1ec3u 10,5% Cr; 304 c\u00f3 ~18% Cr, 8% Ni; 316 c\u00f3 ~16\u201318% Cr, 2\u20133% Mo; 201 gi\u1ea3m Ni, b\u1ed5 sung Mn\/N.<br \/>\n  &#8211; Vi c\u1ea5u tr\u00fac austenit (kh\u00f4ng t\u1eeb), ferrit (t\u1eeb), martensit (t\u1eeb) ho\u1eb7c duplex (pha k\u00e9p austenit\u2013ferrit).<br \/>\n&#8211; Th\u00e9p th\u01b0\u1eddng:<br \/>\n  &#8211; Ch\u1ee7 y\u1ebfu Fe + C; \u0111\u00f4i khi c\u00f3 Mn, Si, P, S \u1edf m\u1ee9c th\u1ea5p.<br \/>\n  &#8211; Vi c\u1ea5u tr\u00fac ferrit + peclit; t\u00f9y x\u1eed l\u00fd nhi\u1ec7t\/c\u00e1n ngu\u1ed9i.<\/p>\n<p>\u00dd ngh\u0129a th\u1ef1c t\u1ebf: th\u00eam Cr\/Ni\/Mo \u1edf inox t\u1ea1o kh\u1ea3 n\u0103ng th\u1ee5 \u0111\u1ed9ng ch\u1ed1ng \u0103n m\u00f2n; th\u00e9p th\u01b0\u1eddng thi\u1ebfu l\u1edbp b\u1ea3o v\u1ec7 t\u1ef1 nhi\u00ean.<\/p>\n<h3>2) Kh\u1ea3 n\u0103ng ch\u1ed1ng \u0103n m\u00f2n<\/h3>\n<p>&#8211; Inox:<br \/>\n  &#8211; L\u1edbp th\u1ee5 \u0111\u1ed9ng t\u1ef1 ph\u1ee5c h\u1ed3i trong m\u00f4i tr\u01b0\u1eddng oxy h\u00f3a trung t\u00ednh; ch\u1ed1ng g\u1ec9 t\u1ed1t trong kh\u00ed quy\u1ec3n, n\u01b0\u1edbc s\u1ea1ch.<br \/>\n  &#8211; Nh\u1ea1y v\u1edbi pitting\/crevice do ion Cl\u2013 (n\u01b0\u1edbc bi\u1ec3n, h\u00f3a ch\u1ea5t). M\u1ee9c \u0111\u1ed9 ch\u1ed1ng pitting \u0111\u01b0\u1ee3c \u01b0\u1edbc theo PREN \u2248 %Cr + 3,3\u00d7%Mo + 16\u00d7%N (304 ~ 18\u201319; 316 ~ 24; duplex 2205 ~ 34+).<br \/>\n&#8211; Th\u00e9p th\u01b0\u1eddng:<br \/>\n  &#8211; G\u1ec9 nhanh trong m\u00f4i tr\u01b0\u1eddng \u1ea9m, m\u1eb7n ho\u1eb7c c\u00f4ng nghi\u1ec7p n\u1ebfu kh\u00f4ng b\u1ea3o v\u1ec7.<br \/>\n  &#8211; C\u1ea7n s\u01a1n, m\u1ea1 k\u1ebdm nh\u00fang n\u00f3ng ho\u1eb7c gi\u1ea3i ph\u00e1p b\u1ea3o tr\u00ec \u0111\u1ecbnh k\u1ef3.<\/p>\n<p>K\u1ebft lu\u1eadn: Inox v\u01b0\u1ee3t tr\u1ed9i v\u1ec1 ch\u1ed1ng \u0103n m\u00f2n n\u1ed9i t\u1ea1i; 316\/duplex cho m\u00f4i tr\u01b0\u1eddng ven bi\u1ec3n\/n\u01b0\u1edbc m\u1eb7n; th\u00e9p th\u01b0\u1eddng ph\u1ea3i d\u1ef1a v\u00e0o l\u1edbp ph\u1ee7.<\/p>\n<h3>3) T\u00ednh ch\u1ea5t c\u01a1 h\u1ecdc (\u0111i\u1ec3n h\u00ecnh, \u1edf tr\u1ea1ng th\u00e1i \u1ee7\/c\u00e1n n\u00f3ng)<\/h3>\n<p>&#8211; Inox austenit 304\/316: gi\u1edbi h\u1ea1n ch\u1ea3y ~205\u2013215 MPa; b\u1ec1n k\u00e9o t\u1ed1i \u0111a ~515\u2013620 MPa; d\u1ebbo dai cao; l\u00e0m vi\u1ec7c t\u1ed1t \u1edf \u2212196\u00b0C \u0111\u1ebfn ~400\u00b0C.<br \/>\n&#8211; Th\u00e9p th\u01b0\u1eddng A36\/SS400: gi\u1edbi h\u1ea1n ch\u1ea3y t\u1ed1i thi\u1ec3u ~235\u2013250 MPa; b\u1ec1n k\u00e9o ~400\u2013550 MPa; d\u1ebbo dai ph\u1ee5 thu\u1ed9c th\u00e0nh ph\u1ea7n v\u00e0 chi\u1ec1u d\u00e0y.<br \/>\n&#8211; Inox c\u00e1n ngu\u1ed9i (301, 304) c\u00f3 th\u1ec3 t\u0103ng b\u1ec1n \u0111\u00e1ng k\u1ec3 nh\u1edd bi\u1ebfn c\u1ee9ng ngu\u1ed9i.<br \/>\n&#8211; Duplex 2205: gi\u1edbi h\u1ea1n ch\u1ea3y ~450\u2013550 MPa, cao h\u01a1n 304\/316 v\u00e0 A36.<\/p>\n<p>\u00dd ngh\u0129a: n\u1ebfu c\u1ea7n \u0111\u1ed9 b\u1ec1n ch\u1ea3y r\u1ea5t cao v\u1edbi kh\u1ed1i l\u01b0\u1ee3ng th\u1ea5p, c\u00e2n nh\u1eafc duplex ho\u1eb7c th\u00e9p h\u1ee3p kim cao; n\u1ebfu \u01b0u ti\u00ean ch\u1ed1ng g\u1ec9 v\u00e0 d\u1ebbo dai, 304\/316 ph\u00f9 h\u1ee3p; k\u1ebft c\u1ea5u ph\u1ed5 th\u00f4ng c\u00f3 th\u1ec3 d\u00f9ng A36\/SS400 k\u00e8m s\u01a1n\/m\u1ea1.<\/p>\n<h3>4) T\u00ednh ch\u1ea5t nhi\u1ec7t v\u00e0 \u0111i\u1ec7n<\/h3>\n<p>&#8211; D\u1eabn nhi\u1ec7t: th\u00e9p th\u01b0\u1eddng ~45\u201360 W\/m\u00b7K; inox 304 ~16 W\/m\u00b7K; 430 ~26 W\/m\u00b7K. Inox d\u1eabn nhi\u1ec7t k\u00e9m h\u01a1n.<br \/>\n&#8211; H\u1ec7 s\u1ed1 gi\u00e3n n\u1edf d\u00e0i: th\u00e9p th\u01b0\u1eddng ~11\u201313 \u00b5m\/m\u00b7K; inox austenit ~16\u201317,5 \u00b5m\/m\u00b7K. Inox gi\u00e3n n\u1edf nhi\u1ec1u h\u01a1n khi n\u00f3ng.<br \/>\n&#8211; \u0110i\u1ec7n tr\u1edf su\u1ea5t: inox cao h\u01a1n (d\u1eabn \u0111i\u1ec7n k\u00e9m). \u1ea2nh h\u01b0\u1edfng \u0111\u1ebfn h\u00e0n (nhi\u1ec7t t\u1eadp trung h\u01a1n) v\u00e0 gia c\u00f4ng nhi\u1ec7t.<\/p>\n<h3>5) T\u1eeb t\u00ednh<\/h3>\n<p>&#8211; Austenitic (304, 316, 201): kh\u00f4ng t\u1eeb \u1edf tr\u1ea1ng th\u00e1i \u1ee7; c\u00f3 th\u1ec3 h\u01a1i nhi\u1ec5m t\u1eeb sau c\u00e1n ngu\u1ed9i\/h\u00e0n.<br \/>\n&#8211; Ferritic (430) &#038; Martensitic (410): t\u1eeb t\u00ednh m\u1ea1nh.<br \/>\n&#8211; Th\u00e9p th\u01b0\u1eddng: t\u1eeb t\u00ednh.<br \/>\nL\u01b0u \u00fd: \u201cInox kh\u00f4ng h\u00fat nam ch\u00e2m\u201d ch\u1ec9 \u0111\u00fang cho inox austenit \u1edf tr\u1ea1ng th\u00e1i \u1ee7; kh\u00f4ng d\u00f9ng nam ch\u00e2m nh\u01b0 ph\u00e9p th\u1eed duy nh\u1ea5t nh\u1eadn di\u1ec7n ch\u1ea5t l\u01b0\u1ee3ng.<\/p>\n<h3>6) H\u00e0n, c\u1eaft, gia c\u00f4ng<\/h3>\n<p>&#8211; H\u00e0n:<br \/>\n  &#8211; Inox 304\/316\/201: h\u00e0n t\u1ed1t; n\u00ean d\u00f9ng c\u1ea5p \u201cL\u201d (304L\/316L) h\u1ea1n ch\u1ebf nh\u1ea1y c\u1ea3m h\u00f3a (sensitization) 450\u2013850\u00b0C; d\u00f9ng que\/d\u00e2y ER308L\/ER316L; b\u1ea3o v\u1ec7 kh\u00ed t\u1ed1t, ki\u1ec3m so\u00e1t nhi\u1ec7t v\u00e0o.<br \/>\n  &#8211; Th\u00e9p th\u01b0\u1eddng: h\u00e0n d\u1ec5; th\u00e9p carbon cao c\u1ea7n preheat\/postheat \u0111\u1ec3 tr\u00e1nh n\u1ee9t.<br \/>\n&#8211; Gia c\u00f4ng c\u1eaft g\u1ecdt:<br \/>\n  &#8211; Inox austenit d\u1ec5 bi\u1ebfn c\u1ee9ng ngu\u1ed9i; c\u1ea7n dao h\u1ee3p kim c\u1ee9ng, t\u1ed1c \u0111\u1ed9 c\u1eaft th\u1ea5p h\u01a1n th\u00e9p th\u01b0\u1eddng 30\u201350%, t\u01b0\u1edbi ngu\u1ed9i d\u1ed3i d\u00e0o; m\u00e1c 303 gia c\u00f4ng t\u1ed1t h\u01a1n 304.<br \/>\n  &#8211; Th\u00e9p th\u01b0\u1eddng gia c\u00f4ng d\u1ec5, m\u00f2n dao ch\u1eadm h\u01a1n.<br \/>\n&#8211; C\u1eaft nhi\u1ec7t:<br \/>\n  &#8211; Oxy-gas ph\u00f9 h\u1ee3p th\u00e9p th\u01b0\u1eddng (inox kh\u00f4ng c\u1eaft b\u1eb1ng oxy-gas do kh\u00f4ng oxy h\u00f3a nh\u01b0 th\u00e9p carbon); inox d\u00f9ng plasma, laser, waterjet.<\/p>\n<h3>7) B\u1ec1 m\u1eb7t &#038; v\u1ec7 sinh<\/h3>\n<p>&#8211; Inox: nhi\u1ec1u ho\u00e0n thi\u1ec7n b\u1ec1 m\u1eb7t (No.1, 2B, BA, No.4 hairline, HL, g\u01b0\u01a1ng 8K). Kh\u1ea3 n\u0103ng v\u1ec7 sinh, ch\u1ed1ng b\u00e1m b\u1ea9n, \u0111\u00e1p \u1ee9ng y\u00eau c\u1ea7u an to\u00e0n th\u1ef1c ph\u1ea9m (304\/316) n\u00ean \u0111\u01b0\u1ee3c d\u00f9ng cho b\u1ebfp, d\u01b0\u1ee3c, F&#038;B.<br \/>\n&#8211; Th\u00e9p th\u01b0\u1eddng: c\u1ea7n s\u01a1n\/m\u1ea1; b\u1ec1 m\u1eb7t d\u1ec5 g\u1ec9 b\u1ea9n; kh\u00f4ng ph\u00f9 h\u1ee3p ti\u1ebfp x\u00fac th\u1ef1c ph\u1ea9m.<\/p>\n<h3>8) Kh\u1ed1i l\u01b0\u1ee3ng ri\u00eang v\u00e0 tr\u1ecdng l\u01b0\u1ee3ng<\/h3>\n<p>&#8211; Inox ~7,9\u20138,0 g\/cm\u00b3; th\u00e9p th\u01b0\u1eddng ~7,85 g\/cm\u00b3. Ch\u00eanh l\u1ec7ch nh\u1ecf; tr\u1ecdng l\u01b0\u1ee3ng ch\u1ee7 y\u1ebfu ph\u1ee5 thu\u1ed9c thi\u1ebft k\u1ebf ti\u1ebft di\u1ec7n v\u00e0 m\u00e1c.<\/p>\n<h3>9) \u0110\u1ed9 b\u1ec1n th\u1eddi ti\u1ebft\/ngo\u00e0i tr\u1eddi<\/h3>\n<p>&#8211; \u0110\u00f4 th\u1ecb n\u1ed9i \u0111\u1ecba: inox 304 \u0111\u1ee7 d\u00f9ng; th\u00e9p th\u01b0\u1eddng c\u1ea7n s\u01a1n t\u1ed1t v\u00e0 b\u1ea3o tr\u00ec.<br \/>\n&#8211; Ven bi\u1ec3n\/kh\u00ed quy\u1ec3n m\u1eb7n: inox 316\/duplex \u01b0u ti\u00ean; 304 d\u1ec5 b\u1ecb r\u1ed7\/\u1ed1 tr\u00e0m; th\u00e9p m\u1ea1 k\u1ebdm tu\u1ed5i th\u1ecd gi\u1ea3m nhanh n\u1ebfu l\u1edbp m\u1ea1 b\u1ecb x\u01b0\u1edbc.<\/p>\n<h2 id=\"toc-2-ung-dung-tieu-bieu-o-viet-nam\">\u1ee8ng d\u1ee5ng ti\u00eau bi\u1ec3u \u1edf Vi\u1ec7t Nam<\/h2>\n<p>&#8211; Inox 304: lan can, b\u1ed3n n\u01b0\u1edbc, thi\u1ebft b\u1ecb b\u1ebfp c\u00f4ng nghi\u1ec7p, \u1ed1ng vi sinh, k\u1ebft c\u1ea5u ngo\u00e0i tr\u1eddi n\u1ed9i \u0111\u1ecba.<br \/>\n&#8211; Inox 316: c\u00f4ng tr\u00ecnh ven bi\u1ec3n, x\u1eed l\u00fd n\u01b0\u1edbc, h\u00f3a ch\u1ea5t nh\u1eb9, t\u00e0u thuy\u1ec1n.<br \/>\n&#8211; Inox 201: n\u1ed9i th\u1ea5t trong nh\u00e0, trang tr\u00ed kh\u00f4; tr\u00e1nh m\u00f4i tr\u01b0\u1eddng \u1ea9m m\u1eb7n.<br \/>\n&#8211; Inox 430: thi\u1ebft b\u1ecb gia d\u1ee5ng, \u1ed1p trang tr\u00ed trong nh\u00e0, y\u00eau c\u1ea7u nhi\u1ec5m t\u1eeb.<br \/>\n&#8211; Th\u00e9p th\u01b0\u1eddng A36\/SS400\/Q235: khung k\u1ebft c\u1ea5u, d\u1ea7m, c\u1ed9t, b\u00edch, b\u1ed3n \u00e1p l\u1ef1c (khi \u0111\u01b0\u1ee3c s\u01a1n\/ph\u1ee7), \u1ed1ng \u0111en\/\u1ed1ng m\u1ea1 k\u1ebdm, th\u00e9p h\u1ed9p k\u1ebft c\u1ea5u.<\/p>\n<h2 id=\"toc-3-chi-phi-gia-ban-dau-vs-chi-phi-vong-doi\">Chi ph\u00ed: Gi\u00e1 ban \u0111\u1ea7u vs chi ph\u00ed v\u00f2ng \u0111\u1eddi<\/h2>\n<p>&#8211; Gi\u00e1 v\u1eadt li\u1ec7u: theo kinh nghi\u1ec7m th\u1ecb tr\u01b0\u1eddng, inox 304 th\u01b0\u1eddng cao h\u01a1n th\u00e9p th\u01b0\u1eddng kho\u1ea3ng 2,5\u20134 l\u1ea7n theo kg; 316 cao h\u01a1n 304 ~25\u201340%. 201 r\u1ebb h\u01a1n 304 ~20\u201335%. (T\u1ef7 l\u1ec7 bi\u1ebfn \u0111\u1ed9ng theo th\u1eddi \u0111i\u1ec3m).<br \/>\n&#8211; Chi ph\u00ed v\u00f2ng \u0111\u1eddi (LCC):<br \/>\n  &#8211; Th\u00e9p th\u01b0\u1eddng: c\u1ea7n s\u01a1n l\u00f3t + s\u01a1n ph\u1ee7 ban \u0111\u1ea7u; chu k\u1ef3 s\u01a1n l\u1ea1i 3\u20135 n\u0103m (\u0111\u00f4 th\u1ecb) ho\u1eb7c 1\u20133 n\u0103m (ven bi\u1ec3n\/c\u00f4ng nghi\u1ec7p). R\u1ee7i ro d\u1eebng m\u00e1y, \u0103n m\u00f2n c\u1ee5c b\u1ed9, thay th\u1ebf chi ti\u1ebft.<br \/>\n  &#8211; Inox: chi ph\u00ed b\u1ea3o tr\u00ec th\u1ea5p (l\u00e0m s\u1ea1ch \u0111\u1ecbnh k\u1ef3); tu\u1ed5i th\u1ecd 15\u201330+ n\u0103m t\u00f9y m\u00e1c\/m\u00f4i tr\u01b0\u1eddng.<br \/>\nV\u00ed d\u1ee5 nhanh: lan can 100 m t\u1ea1i khu ven bi\u1ec3n<br \/>\n  &#8211; Ph\u01b0\u01a1ng \u00e1n A (th\u00e9p th\u01b0\u1eddng m\u1ea1 k\u1ebdm + s\u01a1n): CAPEX = 1\u00d7; OPEX 10 n\u0103m \u2248 0,6\u20131,0\u00d7 (s\u01a1n l\u1ea1i, s\u1eeda g\u1ec9). LCC 10 n\u0103m \u2248 1,6\u20132,0\u00d7.<br \/>\n  &#8211; Ph\u01b0\u01a1ng \u00e1n B (inox 316 No.4): CAPEX = 2,5\u20133,0\u00d7; OPEX 10 n\u0103m \u2248 0,1\u20130,2\u00d7. LCC 10 n\u0103m \u2248 2,6\u20133,2\u00d7 nh\u01b0ng tu\u1ed5i th\u1ecd 20\u201330 n\u0103m; t\u00ednh tr\u00ean 20 n\u0103m, inox 316 th\u01b0\u1eddng r\u1ebb h\u01a1n tr\u00ean m\u1ed7i n\u0103m ph\u1ee5c v\u1ee5 v\u00e0 \u00edt r\u1ee7i ro h\u1ecfng.<\/p>\n<h2 id=\"toc-4-nhan-dien-nhanh-ngoai-cong-truong\">Nh\u1eadn di\u1ec7n nhanh ngo\u00e0i c\u00f4ng tr\u01b0\u1eddng<\/h2>\n<p>&#8211; Nam ch\u00e2m: 304\/316 m\u1edbi th\u01b0\u1eddng kh\u00f4ng h\u00fat; 430\/410 v\u00e0 th\u00e9p th\u01b0\u1eddng h\u00fat. Kh\u00f4ng \u0111\u1ee7 \u0111\u1ec3 k\u1ebft lu\u1eadn d\u1ee9t kho\u00e1t.<br \/>\n&#8211; Quan s\u00e1t b\u1ec1 m\u1eb7t: inox 2B\/BA s\u00e1ng, \u0111\u1ec1u; th\u00e9p th\u01b0\u1eddng c\u00f3 v\u1ea3y c\u00e1n, d\u1ec5 \u1ed1 g\u1ec9.<br \/>\n&#8211; Ph\u1ea3n \u1ee9ng g\u1ec9 nhanh: \u0111\u1ec3 qua \u0111\u00eam ngo\u00e0i tr\u1eddi, th\u00e9p th\u01b0\u1eddng \u1ed1 n\u00e2u; inox kh\u00f4ng \u0111\u1ed5i (tr\u1eeb m\u00f4i tr\u01b0\u1eddng m\u1eb7n, c\u00f3 th\u1ec3 \u1ed1 nh\u1eb9).<br \/>\n&#8211; Spark test (\u0111\u00e1 m\u00e0i): th\u00e9p carbon tia d\u00e0i, s\u00e1ng; inox tia ng\u1eafn, \u00edt ch\u00e1y sao.<br \/>\n&#8211; PMI\/XRF: x\u00e1c th\u1ef1c m\u00e1c b\u1eb1ng m\u00e1y ph\u00e2n t\u00edch ph\u1ed5; n\u00ean y\u00eau c\u1ea7u Mill Test Certificate (MTC).<\/p>\n<h2 id=\"toc-5-tieu-chuan-mac-pho-bien-tuong-duong\">Ti\u00eau chu\u1ea9n &#038; m\u00e1c ph\u1ed5 bi\u1ebfn t\u01b0\u01a1ng \u0111\u01b0\u01a1ng<\/h2>\n<p>&#8211; Inox:<br \/>\n  &#8211; T\u1ea5m\/cu\u1ed9n: ASTM A240 (304\/304L, 316\/316L, 201, 430).<br \/>\n  &#8211; \u1ed0ng h\u00e0n trang tr\u00ed: ASTM A554; \u1ed0ng c\u00f4ng nghi\u1ec7p: ASTM A312.<br \/>\n  &#8211; Thanh\/\u0111\u1eb7c: ASTM A276.<br \/>\n&#8211; Th\u00e9p th\u01b0\u1eddng:<br \/>\n  &#8211; Th\u00e9p t\u1ea5m k\u1ebft c\u1ea5u: ASTM A36, JIS SS400, GB Q235.<br \/>\n  &#8211; \u1ed0ng h\u00e0n \u0111en: ASTM A53; \u1ed0ng \u0111\u00fac \u00e1p l\u1ef1c: ASTM A106.<br \/>\n  &#8211; Th\u00e9p h\u1ed9p k\u1ebft c\u1ea5u: ASTM A500.<br \/>\nGhi ch\u00fa: T\u1ea1i Vi\u1ec7t Nam, c\u00e1c m\u00e1c th\u01b0\u01a1ng m\u1ea1i hay g\u1eb7p g\u1ed3m 201\/304\/316\/430 cho inox; CT3\/SS400\/A36\/Q235 cho th\u00e9p th\u01b0\u1eddng.<\/p>\n<h2 id=\"toc-6-huong-dan-chon-vat-lieu-theo-moi-truong-lam-viec\">H\u01b0\u1edbng d\u1eabn ch\u1ecdn v\u1eadt li\u1ec7u theo m\u00f4i tr\u01b0\u1eddng l\u00e0m vi\u1ec7c<\/h2>\n<p>&#8211; Trong nh\u00e0 kh\u00f4, trang tr\u00ed: inox 201\/430 ho\u1eb7c th\u00e9p th\u01b0\u1eddng s\u01a1n t\u0129nh \u0111i\u1ec7n (t\u00f9y ng\u00e2n s\u00e1ch v\u00e0 y\u00eau c\u1ea7u v\u1ec7 sinh).<br \/>\n&#8211; Ngo\u00e0i tr\u1eddi n\u1ed9i \u0111\u1ecba (kh\u00f4ng m\u1eb7n): inox 304 cho tay v\u1ecbn, lan can, m\u00e1i; th\u00e9p m\u1ea1 k\u1ebdm + s\u01a1n cho k\u1ebft c\u1ea5u l\u1edbn.<br \/>\n&#8211; Ven bi\u1ec3n (<5 km b\u1edd bi\u1ec3n) ho\u1eb7c phun s\u01b0\u01a1ng mu\u1ed1i: inox 316 ho\u1eb7c duplex 2205; tr\u00e1nh 201\/304 cho chi ti\u1ebft ph\u01a1i m\u01b0a.\n- Th\u1ef1c ph\u1ea9m\/d\u01b0\u1ee3c: inox 304\/316 b\u1ec1 m\u1eb7t 2B\/BA\/No.4; x\u1eed l\u00fd th\u1ee5 \u0111\u1ed9ng theo ASTM A967.\n- H\u00f3a ch\u1ea5t nh\u1eb9 (clorua\/n\u01b0\u1edbc mu\u1ed1i): \u01b0u ti\u00ean 316\/duplex; ki\u1ec3m tra t\u01b0\u01a1ng th\u00edch h\u00f3a ch\u1ea5t c\u1ee5 th\u1ec3.\n- Nhi\u1ec7t cao (\u2264450\u00b0C l\u00e2u d\u00e0i cho austenit; ferrit\/martensit d\u00f9ng theo chu\u1ea9n nhi\u1ec7t): tham kh\u1ea3o d\u1eef li\u1ec7u m\u00e1c.\n\n\n\n<h2 id=\"toc-7-cac-loi-chon-vat-lieu-thuong-gap\">C\u00e1c l\u1ed7i ch\u1ecdn v\u1eadt li\u1ec7u th\u01b0\u1eddng g\u1eb7p<\/h2>\n<p>&#8211; D\u00f9ng inox 201\/304 cho c\u00f4ng tr\u00ecnh s\u00e1t bi\u1ec3n, g\u00e2y r\u1ed7 nhanh.<br \/>\n&#8211; D\u00f9ng \u201cnam ch\u00e2m kh\u00f4ng h\u00fat\u201d \u0111\u1ec3 k\u1ebft lu\u1eadn \u201c\u0111\u00e2y l\u00e0 304 x\u1ecbn\u201d; b\u1ecf qua ch\u1ee9ng ch\u1ec9 v\u00e0 ki\u1ec3m tra PMI.<br \/>\n&#8211; Thi\u1ebft k\u1ebf khe k\u1ebd (crevice) v\u00e0 m\u1ed1i h\u00e0n kh\u00f4ng v\u1ec7 sinh trong m\u00f4i tr\u01b0\u1eddng \u1ea9m m\u1eb7n, khi\u1ebfn inox v\u1eabn b\u1ecb \u0103n m\u00f2n k\u1ebd.<br \/>\n&#8211; Ch\u1ecdn 304 thay v\u00ec 316 cho b\u1ed3n h\u00f3a ch\u1ea5t c\u00f3 Cl\u2013; kh\u00f4ng t\u00ednh to\u00e1n PREN.<br \/>\n&#8211; Ti\u1ebft ki\u1ec7m CAPEX b\u1eb1ng th\u00e9p th\u01b0\u1eddng \u1edf v\u1ecb tr\u00ed kh\u00f3 b\u1ea3o tr\u00ec, d\u1eabn \u0111\u1ebfn OPEX cao v\u00e0 d\u1eebng m\u00e1y.<\/p>\n<h2 id=\"toc-8-cau-hoi-nhanh\">C\u00e2u h\u1ecfi nhanh<\/h2>\n<p>&#8211; Inox c\u00f3 c\u1ea7n s\u01a1n kh\u00f4ng? Th\u00f4ng th\u01b0\u1eddng kh\u00f4ng; nh\u01b0ng c\u00f3 th\u1ec3 s\u01a1n ph\u1ee7 trang tr\u00ed ho\u1eb7c t\u0103ng b\u1ec1n \u0103n m\u00f2n trong m\u00f4i tr\u01b0\u1eddng kh\u1eafc nghi\u1ec7t.<br \/>\n&#8211; Inox c\u00f3 r\u1ec9 s\u00e9t kh\u00f4ng? C\u00f3 th\u1ec3, trong m\u00f4i tr\u01b0\u1eddng clorua cao ho\u1eb7c khi b\u1ec1 m\u1eb7t b\u1ecb nhi\u1ec5m s\u1eaft\/thi\u1ebft k\u1ebf b\u1eaby b\u1ea9n; x\u1eed l\u00fd l\u00e0m s\u1ea1ch, pickling-passivation s\u1ebd kh\u00f4i ph\u1ee5c th\u1ee5 \u0111\u1ed9ng.<br \/>\n&#8211; Th\u00e9p m\u1ea1 k\u1ebdm c\u00f3 thay th\u1ebf inox kh\u00f4ng? C\u00f3 trong m\u00f4i tr\u01b0\u1eddng nh\u1eb9, chu k\u1ef3 b\u1ea3o tr\u00ec ph\u00f9 h\u1ee3p; kh\u00f4ng t\u01b0\u01a1ng \u0111\u01b0\u01a1ng v\u1ec1 v\u1ec7 sinh, th\u1ea9m m\u1ef9 v\u00e0 tu\u1ed5i th\u1ecd \u1edf ven bi\u1ec3n\/\u0103n m\u00f2n cao.<\/p>\n<h2 id=\"toc-9-nguon-tham-khao\">Ngu\u1ed3n tham kh\u1ea3o<\/h2>\n<p>&#8211; ASTM International: ASTM A240 (t\u1ea5m inox), ASTM A312 (\u1ed1ng inox), ASTM A36\/A53\/A106\/A500 (th\u00e9p carbon).<br \/>\n&#8211; Nickel Institute \u2013 Stainless Steels: Properties and Applications; Guidelines for Corrosion Prevention.<br \/>\n&#8211; Outokumpu\/ATI\/AK Steel Datasheets cho 304\/316\/201\/430\/2205.<br \/>\n&#8211; SSINA (Specialty Steel Industry of North America): Stainless Steel for Design Engineers.<br \/>\n&#8211; ISO 8044: Corrosion of metals and alloys \u2013 Basic terms and definitions.<br \/>\n&#8211; World Steel Association: Steel Standards v\u00e0 So s\u00e1nh m\u00e1c.<br \/>\n(C\u00e1c d\u1eef li\u1ec7u gi\u00e1 tr\u1ecb \u0111i\u1ec3n h\u00ecnh n\u00eau tr\u00ean mang t\u00ednh tham kh\u1ea3o; lu\u00f4n \u0111\u1ed1i chi\u1ebfu MTC\/TCVN\/ASTM c\u1ee7a l\u00f4 h\u00e0ng c\u1ee5 th\u1ec3.)<\/p>\n<h2 id=\"toc-10-ket-luan\">K\u1ebft lu\u1eadn<\/h2>\n<p>&#8211; C\u1ed1t l\u00f5i kh\u00e1c bi\u1ec7t: inox c\u00f3 \u226510,5% Cr t\u1ea1o l\u1edbp th\u1ee5 \u0111\u1ed9ng ch\u1ed1ng \u0103n m\u00f2n t\u1ef1 nhi\u00ean; th\u00e9p th\u01b0\u1eddng th\u00ec kh\u00f4ng v\u00e0 ph\u1ea3i d\u1ef1a v\u00e0o l\u1edbp ph\u1ee7.<br \/>\n&#8211; T\u00ednh n\u0103ng: inox v\u01b0\u1ee3t tr\u1ed9i v\u1ec1 ch\u1ed1ng g\u1ec9, v\u1ec7 sinh v\u00e0 b\u1ea3o tr\u00ec; th\u00e9p th\u01b0\u1eddng d\u1ec5 gia c\u00f4ng, gi\u00e1 \u0111\u1ea7u v\u00e0o th\u1ea5p, ph\u00f9 h\u1ee3p k\u1ebft c\u1ea5u l\u1edbn khi \u0111\u01b0\u1ee3c b\u1ea3o v\u1ec7 t\u1ed1t.<br \/>\n&#8211; L\u1ef1a ch\u1ecdn: 304 cho ngo\u00e0i tr\u1eddi n\u1ed9i \u0111\u1ecba; 316\/duplex cho ven bi\u1ec3n\/clorua; 201\/430 cho n\u1ed9i th\u1ea5t kh\u00f4; th\u00e9p th\u01b0\u1eddng cho k\u1ebft c\u1ea5u kinh t\u1ebf c\u00f3 k\u1ebf ho\u1ea1ch b\u1ea3o tr\u00ec.<br \/>\n&#8211; Chi ph\u00ed: \u0111\u1eebng ch\u1ec9 nh\u00ecn CAPEX; LCC v\u00e0 r\u1ee7i ro d\u1eebng m\u00e1y th\u01b0\u1eddng nghi\u00eang v\u1ec1 inox trong m\u00f4i tr\u01b0\u1eddng \u0103n m\u00f2n.<\/p>\n<p>C\u1ea7n t\u01b0 v\u1ea5n m\u00e1c v\u1eadt li\u1ec7u, \u0111\u1ed9 d\u00e0y, b\u1ec1 m\u1eb7t ho\u1eb7c thay th\u1ebf t\u01b0\u01a1ng \u0111\u01b0\u01a1ng theo ti\u00eau chu\u1ea9n? Li\u00ean h\u1ec7 Inox Cuong Thinh \u0111\u1ec3 \u0111\u01b0\u1ee3c k\u1ef9 s\u01b0 v\u1eadt li\u1ec7u h\u1ed7 tr\u1ee3 v\u00e0 b\u00e1o gi\u00e1 t\u1ed1t nh\u1ea5t.<br \/>\nHotline: 0343.417.281<br \/>\nEmail: inoxcongnghiep.cuongthinh@gmail.com<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Gi\u1ea3i th\u00edch r\u00f5 kh\u00e1c bi\u1ec7t gi\u1eefa inox v\u00e0 th\u00e9p th\u01b0\u1eddng: th\u00e0nh ph\u1ea7n, c\u01a1 t\u00ednh, ch\u1ed1ng \u0103n m\u00f2n, h\u00e0n, gia c\u00f4ng, chi ph\u00ed v\u00f2ng \u0111\u1eddi v\u00e0 c\u00e1ch ch\u1ecdn v\u1eadt li\u1ec7u ph\u00f9 h\u1ee3p.<\/p>\n","protected":false},"author":7,"featured_media":1029,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[23],"tags":[],"class_list":["post-1554","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\/1554","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=1554"}],"version-history":[{"count":0,"href":"https:\/\/inoxcuongthinh.com\/inct\/wp\/v2\/posts\/1554\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/inoxcuongthinh.com\/inct\/wp\/v2\/media\/1029"}],"wp:attachment":[{"href":"https:\/\/inoxcuongthinh.com\/inct\/wp\/v2\/media?parent=1554"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/inoxcuongthinh.com\/inct\/wp\/v2\/categories?post=1554"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/inoxcuongthinh.com\/inct\/wp\/v2\/tags?post=1554"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}