{"id":2013,"date":"2026-05-13T12:33:24","date_gmt":"2026-05-13T05:33:24","guid":{"rendered":"https:\/\/inoxcuongthinh.com\/cam-nang-mac-thep-khong-gi-so-sanh-201-304-316-430-duplex\/"},"modified":"2026-05-13T12:33:24","modified_gmt":"2026-05-13T05:33:24","slug":"cam-nang-mac-thep-khong-gi-so-sanh-201-304-316-430-duplex","status":"publish","type":"post","link":"https:\/\/inoxcuongthinh.com\/cam-nang-mac-thep-khong-gi-so-sanh-201-304-316-430-duplex\/","title":{"rendered":"C\u1ea9m nang m\u00e1c th\u00e9p kh\u00f4ng g\u1ec9: so s\u00e1nh 201, 304, 316, 430, Duplex"},"content":{"rendered":"<div class=\"custom-toc\">\n<h3>N\u1ed9i dung ch\u00ednh<\/h3>\n<ul>\n<li><a href=\"#toc-0-chon-dung-mac-inox-quyet-dinh-tuoi-tho-va-chi-phi-\">Ch\u1ecdn \u0111\u00fang m\u00e1c inox: quy\u1ebft \u0111\u1ecbnh tu\u1ed5i th\u1ecd v\u00e0 chi ph\u00ed v\u00f2ng \u0111\u1eddi<\/a><\/li>\n<li><a href=\"#toc-1-khai-quat-ve-mac-inox-va-vi-sao-lua-chon-quan-tron\">Kh\u00e1i qu\u00e1t v\u1ec1 m\u00e1c inox v\u00e0 v\u00ec sao l\u1ef1a ch\u1ecdn quan tr\u1ecdng<\/a><\/li>\n<li><a href=\"#toc-2-cac-khia-canh-then-chot-khi-so-sanh-mac-inox\">C\u00e1c kh\u00eda c\u1ea1nh then ch\u1ed1t khi so s\u00e1nh m\u00e1c inox<\/a><\/li>\n<li><a href=\"#toc-3-di-sau-theo-chu-de-lien-quan\">\u0110i s\u00e2u theo ch\u1ee7 \u0111\u1ec1 li\u00ean quan<\/a><\/li>\n<li><a href=\"#toc-4-ung-dung-thuc-te-va-khuyen-nghi-chuyen-gia\">\u1ee8ng d\u1ee5ng th\u1ef1c t\u1ebf v\u00e0 khuy\u1ebfn ngh\u1ecb chuy\u00ean gia<\/a><\/li>\n<li><a href=\"#toc-5-ket-luan-va-buoc-tiep-theo\">K\u1ebft lu\u1eadn v\u00e0 b\u01b0\u1edbc ti\u1ebfp theo<\/a><\/li>\n<\/ul>\n<\/div>\n<h2 id=\"toc-0-chon-dung-mac-inox-quyet-dinh-tuoi-tho-va-chi-phi-\">Ch\u1ecdn \u0111\u00fang m\u00e1c inox: quy\u1ebft \u0111\u1ecbnh tu\u1ed5i th\u1ecd v\u00e0 chi ph\u00ed v\u00f2ng \u0111\u1eddi<\/h2>\n<p>\u1ede c\u00f4ng tr\u00ecnh ngo\u00e0i tr\u1eddi H\u00e0 N\u1ed9i, nh\u00e0 x\u01b0\u1edfng ven bi\u1ec3n H\u1ea3i Ph\u00f2ng, \u0111\u1ebfn b\u1ed3n b\u1ec3 h\u00f3a ch\u1ea5t, sai m\u00e1c inox c\u00f3 th\u1ec3 khi\u1ebfn b\u1ec1 m\u1eb7t \u1ed1 v\u00e0ng, r\u1ed7 pitting, m\u1ed1i h\u00e0n n\u1ee9t \u2013 k\u00e9o theo chi ph\u00ed b\u1ea3o tr\u00ec t\u0103ng v\u1ecdt v\u00e0 d\u1eebng m\u00e1y kh\u00f4ng k\u1ebf ho\u1ea1ch. B\u00e0i to\u00e1n c\u1ee7a k\u1ef9 s\u01b0 v\u00e0 ch\u1ee7 x\u01b0\u1edfng kh\u00f4ng ch\u1ec9 l\u00e0 \u201cgi\u00e1 r\u1ebb hay \u0111\u1eaft\u201d, m\u00e0 l\u00e0 ch\u1ecdn \u0111\u00fang m\u00e1c th\u00e9p kh\u00f4ng g\u1ec9 cho m\u00f4i tr\u01b0\u1eddng, nhi\u1ec7t \u0111\u1ed9, h\u00f3a ch\u1ea5t v\u00e0 ph\u01b0\u01a1ng \u00e1n gia c\u00f4ng c\u1ee5 th\u1ec3. B\u00e0i vi\u1ebft n\u00e0y cung c\u1ea5p m\u1ed9t khung ph\u00e2n t\u00edch chuy\u00ean s\u00e2u, so s\u00e1nh nh\u1eefng m\u00e1c inox ph\u1ed5 bi\u1ebfn (201, 304\/304L\/304H, 316\/316L, 430, c\u00e1c m\u00e1c ch\u1ecbu nhi\u1ec7t v\u00e0 Duplex), gi\u1ea3i th\u00edch b\u1ea3n ch\u1ea5t vi kim lo\u1ea1i \u2013 th\u00e0nh ph\u1ea7n h\u00f3a h\u1ecdc \u2013 c\u01a1 ch\u1ebf ch\u1ed1ng \u0103n m\u00f2n, t\u1eeb \u0111\u00f3 \u0111\u01b0a ra khuy\u1ebfn ngh\u1ecb \u1ee9ng d\u1ee5ng ph\u00f9 h\u1ee3p t\u1ea1i Vi\u1ec7t Nam. B\u1ea1n s\u1ebd c\u00f3 ti\u00eau ch\u00ed ch\u1ecdn v\u1eadt li\u1ec7u theo PREN, m\u00f4i tr\u01b0\u1eddng chloride, y\u00eau c\u1ea7u h\u00e0n, ho\u00e0n thi\u1ec7n b\u1ec1 m\u1eb7t; c\u00f9ng c\u00e1c l\u01b0u \u00fd ch\u1ee9ng ch\u1ec9, ki\u1ec3m tra v\u1eadt li\u1ec7u. M\u1ee5c ti\u00eau: gi\u1ea3m r\u1ee7i ro \u0103n m\u00f2n s\u1edbm, t\u1ed1i \u01b0u chi ph\u00ed v\u00f2ng \u0111\u1eddi, v\u00e0 \u0111\u1ea3m b\u1ea3o ti\u1ebfn \u0111\u1ed9 thi c\u00f4ng.<\/p>\n<h2 id=\"toc-1-khai-quat-ve-mac-inox-va-vi-sao-lua-chon-quan-tron\">Kh\u00e1i qu\u00e1t v\u1ec1 m\u00e1c inox v\u00e0 v\u00ec sao l\u1ef1a ch\u1ecdn quan tr\u1ecdng<\/h2>\n<p>M\u00e1c inox (th\u00e9p kh\u00f4ng g\u1ec9) l\u00e0 k\u00fd hi\u1ec7u v\u1eadt li\u1ec7u th\u1ec3 hi\u1ec7n th\u00e0nh ph\u1ea7n h\u00f3a h\u1ecdc, t\u1ed5 ch\u1ee9c kim lo\u1ea1i v\u00e0 t\u00ednh n\u0103ng theo ti\u00eau chu\u1ea9n (ASTM, JIS, EN). T\u1ea5t c\u1ea3 inox \u0111\u1ec1u c\u00f3 t\u1ed1i thi\u1ec3u ~10,5% Cr \u0111\u1ec3 t\u1ea1o l\u1edbp th\u1ee5 \u0111\u1ed9ng Cr2O3 ch\u1ed1ng g\u1ec9. Tuy nhi\u00ean, m\u1ed7i m\u00e1c kh\u00e1c nhau v\u1ec1 h\u00e0m l\u01b0\u1ee3ng Ni, Mo, N, C\u2026 d\u1eabn \u0111\u1ebfn kh\u00e1c bi\u1ec7t l\u1edbn v\u1ec1 ch\u1ed1ng \u0103n m\u00f2n, c\u01a1 t\u00ednh, h\u00e0n v\u00e0 gi\u00e1 th\u00e0nh.<\/p>\n<p>V\u1edbi c\u00e1c d\u1ef1 \u00e1n th\u1ef1c t\u1ebf, l\u1ef1a ch\u1ecdn m\u00e1c inox quy\u1ebft \u0111\u1ecbnh:<br \/>\n&#8211; \u0110\u1ed9 b\u1ec1n m\u00f4i tr\u01b0\u1eddng: n\u01b0\u1edbc m\u01b0a axit \u0111\u00f4 th\u1ecb, h\u01a1i mu\u1ed1i v\u00f9ng bi\u1ec3n, h\u00f3a ch\u1ea5t CIP\/SIP.<br \/>\n&#8211; Kh\u1ea3 n\u0103ng gia c\u00f4ng: c\u1eaft, ch\u1ea5n, h\u00e0n, \u0111\u00e1nh b\u00f3ng; h\u1ea1n ch\u1ebf bi\u1ebfn d\u1ea1ng v\u00e0 n\u1ee9t n\u00f3ng.<br \/>\n&#8211; Tu\u1ed5i th\u1ecd v\u00e0 chi ph\u00ed v\u00f2ng \u0111\u1eddi: chi ph\u00ed v\u1eadt li\u1ec7u ban \u0111\u1ea7u vs. chi ph\u00ed b\u1ea3o tr\u00ec, thay th\u1ebf.<br \/>\n&#8211; Tu\u00e2n th\u1ee7 quy chu\u1ea9n: y\u00eau c\u1ea7u ng\u00e0nh th\u1ef1c ph\u1ea9m, d\u01b0\u1ee3c, d\u1ea7u kh\u00ed, ki\u1ebfn tr\u00fac.<\/p>\n<p>N\u1eafm \u0111\u00fang \u201cc\u00e1i g\u00ec\u201d v\u00e0 \u201cv\u00ec sao\u201d gi\u00fap tr\u00e1nh ch\u1ecdn th\u1eeba\/t h\u1ee5t c\u1ea5p, ki\u1ec3m so\u00e1t r\u1ee7i ro k\u1ef9 thu\u1eadt v\u00e0 t\u1ed1i \u01b0u ng\u00e2n s\u00e1ch.<\/p>\n<h2 id=\"toc-2-cac-khia-canh-then-chot-khi-so-sanh-mac-inox\">C\u00e1c kh\u00eda c\u1ea1nh then ch\u1ed1t khi so s\u00e1nh m\u00e1c inox<\/h2>\n<h3>1) Th\u00e0nh ph\u1ea7n h\u00f3a h\u1ecdc v\u00e0 t\u1ed5 ch\u1ee9c kim lo\u1ea1i<\/h3>\n<p>&#8211; Cr t\u1ea1o l\u1edbp th\u1ee5 \u0111\u1ed9ng; Ni \u1ed5n \u0111\u1ecbnh t\u1ed5 ch\u1ee9c austenit (d\u1ebbo, d\u1ec5 h\u00e0n); Mo t\u0103ng ch\u1ed1ng r\u1ed7 chloride; N t\u0103ng b\u1ec1n v\u00e0 PREN; C \u1ea3nh h\u01b0\u1edfng nh\u1ea1y c\u1ea3m h\u00f3a h\u1ecdc v\u00f9ng h\u00e0n.<br \/>\n&#8211; H\u1ecd austenitic (201, 304, 316): kh\u00f4ng t\u1eeb t\u00ednh (sau gia c\u00f4ng c\u00f3 th\u1ec3 h\u01a1i h\u00fat), d\u1ec5 h\u00e0n, ch\u1ed1ng \u0103n m\u00f2n t\u1ed1t.<br \/>\n&#8211; H\u1ecd ferritic (430): t\u1eeb t\u00ednh, Ni th\u1ea5p, gi\u00e1 r\u1ebb h\u01a1n nh\u01b0ng ch\u1ed1ng \u0103n m\u00f2n v\u00e0 h\u00e0n k\u00e9m h\u01a1n.<br \/>\n&#8211; Duplex (2205\u2026): pha tr\u1ed9n austenit + ferrit, b\u1ec1n cao v\u00e0 ch\u1ed1ng SCC t\u1ed1t.<\/p>\n<h3>2) Ch\u1ed1ng \u0103n m\u00f2n: t\u1ed5ng qu\u00e1t v\u00e0 theo m\u00f4i tr\u01b0\u1eddng<\/h3>\n<p>&#8211; PREN \u2248 %Cr + 3,3\u00d7%Mo + 16\u00d7%N. So s\u00e1nh \u0111i\u1ec3n h\u00ecnh: 430 (\u224816\u201318) < 201 (\u224817\u201318) < 304 (\u224818) < 316\/316L (\u224824) < Duplex 2205 (\u224834). \n- N\u01b0\u1edbc m\u01b0a \u0111\u00f4 th\u1ecb\/\u1ea9m: 304 \u0111\u1ee7 cho \u0111a s\u1ed1 \u1ee9ng d\u1ee5ng; g\u1ea7n bi\u1ec3n ho\u1eb7c phun mu\u1ed1i \u2192 316\/316L ho\u1eb7c Duplex. \n- H\u00f3a ch\u1ea5t: t\u00f9y pH, chloride, nhi\u1ec7t \u0111\u1ed9; 316\/316L ph\u1ed5 bi\u1ebfn cho CIP\/SIP nh\u1eb9, Duplex\/Super Duplex cho chloride cao.\n\n\n\n<h3>3) C\u01a1 t\u00ednh, h\u00e0n v\u00e0 gia c\u00f4ng<\/h3>\n<p>&#8211; 304\/316: d\u1ebbo t\u1ed1t, \u0111\u1ed9 b\u1ec1n k\u00e9o ~520\u2013620 MPa; h\u00e0n MIG\/TIG thu\u1eadn l\u1ee3i v\u1edbi que ER308L\/ER316L; tr\u00e1nh nhi\u1ec5m s\u1eaft b\u1ec1 m\u1eb7t.<br \/>\n&#8211; 201: \u0111\u1ecbnh h\u00ecnh t\u1ed1t nh\u01b0ng r\u1ee7i ro \u0103n m\u00f2n k\u1ebd; y\u00eau c\u1ea7u ki\u1ec3m so\u00e1t b\u1ec1 m\u1eb7t.<br \/>\n&#8211; 430: h\u00e0n h\u1ea1n ch\u1ebf, d\u1ec5 gi\u00f2n t\u1ea1i v\u00f9ng h\u00e0n; ph\u00f9 h\u1ee3p d\u1eadp h\u00ecnh, trang tr\u00ed trong nh\u00e0.<br \/>\n&#8211; Duplex: b\u1ec1n cao (~750\u2013800 MPa), ki\u1ec3m so\u00e1t nhi\u1ec7t \u0111\u1ea7u v\u00e0o khi h\u00e0n \u0111\u1ec3 gi\u1eef c\u00e2n b\u1eb1ng pha.<\/p>\n<h3>4) Nhi\u1ec7t \u0111\u1ed9 l\u00e0m vi\u1ec7c v\u00e0 oxy h\u00f3a<\/h3>\n<p>&#8211; 304\/316 ch\u1ecbu \u0111\u01b0\u1ee3c 870\u2013925\u00b0C v\u1ec1 oxy h\u00f3a ng\u1eafn h\u1ea1n; 304H t\u1ed1i \u01b0u h\u00f3a kh\u1ea3 n\u0103ng ch\u1ecbu ch\u1ea3y d\u1ebbo cao nhi\u1ec7t (~\u2264815\u00b0C).<br \/>\n&#8211; 309S\/310S: Cr\/Ni cao, ch\u1ed1ng oxy h\u00f3a v\u01b0\u1ee3t tr\u1ed9i \u1edf 1000\u20131100\u00b0C, d\u00f9ng cho l\u00f2, \u1ed1ng kh\u00f3i, bu\u1ed3ng \u0111\u1ed1t.<\/p>\n<h3>5) Chi ph\u00ed v\u00e0 kh\u1ea3 d\u1ee5ng t\u1ea1i Vi\u1ec7t Nam<\/h3>\n<p>&#8211; Gi\u00e1 bi\u1ebfn \u0111\u1ed9ng theo Ni\/Mo; 201 v\u00e0 430 c\u00f3 l\u1ee3i th\u1ebf chi ph\u00ed, 316\/310\/duplex cao h\u01a1n.<br \/>\n&#8211; Ngu\u1ed3n h\u00e0ng ph\u1ed5 bi\u1ebfn: t\u1ea5m cu\u1ed9n 0.5\u20136.0 mm (2B\/BA\/HL), t\u1ea5m d\u00e0y c\u1eaft plasma, \u1ed1ng h\u1ed9p trang tr\u00ed v\u00e0 c\u00f4ng nghi\u1ec7p, ph\u1ee5 ki\u1ec7n h\u00e0n. Y\u00eau c\u1ea7u MTC\/CO-CQ \u0111\u1ec3 ki\u1ec3m so\u00e1t ch\u1ea5t l\u01b0\u1ee3ng.<\/p>\n<h2 id=\"toc-3-di-sau-theo-chu-de-lien-quan\">\u0110i s\u00e2u theo ch\u1ee7 \u0111\u1ec1 li\u00ean quan<\/h2>\n<p>Th\u1ecb ph\u1ea7n l\u1edbn nh\u1ea5t thu\u1ed9c v\u1ec1 304 nh\u1edd c\u00e2n b\u1eb1ng gi\u1eefa ch\u1ed1ng \u0103n m\u00f2n, \u0111\u1ed9 d\u1ebbo v\u00e0 kh\u1ea3 n\u0103ng h\u00e0n \u2013 ph\u00f9 h\u1ee3p t\u1eeb b\u1ebfp c\u00f4ng nghi\u1ec7p, lan can \u0111\u1ebfn b\u1ed3n b\u1ec3 nh\u1eb9. \u0110\u1ec3 l\u00fd gi\u1ea3i v\u00ec sao 304 d\u1eabn \u0111\u1ea7u to\u00e0n c\u1ea7u v\u00e0 c\u00e1ch t\u1ed1i \u01b0u trong t\u1eebng \u1ee9ng d\u1ee5ng, xem ph\u00e2n t\u00edch chuy\u00ean s\u00e2u.<br \/>\n<!-- CLUSTER_PLACEHOLDER_1 --><\/p>\n<p>Khi c\u1ea7n t\u1ed1i \u01b0u chi ph\u00ed cho n\u1ed9i th\u1ea5t, bi\u1ec3n b\u1ea3ng, tay v\u1ecbn trong nh\u00e0 kh\u00f4 r\u00e1o, 201 l\u00e0 l\u1ef1a ch\u1ecdn \u0111\u00e1ng c\u00e2n nh\u1eafc. Tuy nhi\u00ean, c\u1ea7n nh\u1eadn di\u1ec7n \u0111\u00fang r\u1ee7i ro trong m\u00f4i tr\u01b0\u1eddng \u1ea9m, chloride v\u00e0 c\u00e1ch ki\u1ec3m so\u00e1t ho\u00e0n thi\u1ec7n b\u1ec1 m\u1eb7t \u0111\u1ec3 tr\u00e1nh \u1ed1 v\u00e0ng s\u1edbm.<br \/>\n<!-- CLUSTER_PLACEHOLDER_2 --><\/p>\n<p>V\u1edbi m\u00f4i tr\u01b0\u1eddng phun s\u01b0\u01a1ng mu\u1ed1i, b\u1ebfn c\u1ea3ng, c\u00f4ng nghi\u1ec7p th\u1ef1c ph\u1ea9m \u2013 h\u00f3a ch\u1ea5t c\u00f3 chloride, 316\/316L cho th\u1ea5y \u01b0u th\u1ebf r\u00f5 r\u1ec7t nh\u1edd Mo v\u00e0 N. Kh\u1ea3 n\u0103ng ch\u1ed1ng r\u1ed7 k\u1ebd, n\u1ee9t \u0103n m\u00f2n \u1ee9ng su\u1ea5t t\u1ed1t h\u01a1n 304 gi\u00fap gia t\u0103ng tu\u1ed5i th\u1ecd \u0111\u00e1ng k\u1ec3.<br \/>\n<!-- CLUSTER_PLACEHOLDER_3 --><\/p>\n<p>D\u00f2ng 430 (ferritic) h\u1ea5p d\u1eabn v\u1ec1 gi\u00e1, t\u1eeb t\u00ednh r\u00f5 r\u1ec7t v\u00ec c\u1ea5u tr\u00fac BCC, ph\u00f9 h\u1ee3p trang tr\u00ed n\u1ed9i th\u1ea5t, v\u1ecf m\u00e1y, \u1ed1p t\u01b0\u1eddng kh\u00f4. Nh\u01b0ng khi ra ngo\u00e0i tr\u1eddi ho\u1eb7c h\u00e0n nhi\u1ec1u, c\u1ea7n c\u00e2n nh\u1eafc k\u1ef9 c\u00e1c h\u1ea1n ch\u1ebf.<br \/>\n<!-- CLUSTER_PLACEHOLDER_4 --><\/p>\n<p>B\u1ea3n ch\u1ea5t \u201c18-8\u201d c\u1ee7a 304 b\u1eaft ngu\u1ed3n t\u1eeb Cr v\u00e0 Ni. Cr t\u1ea1o l\u1edbp th\u1ee5 \u0111\u1ed9ng, Ni gi\u1eef c\u1ea5u tr\u00fac austenit; ch\u1ec9 s\u1ed1 n\u00e0y quy\u1ebft \u0111\u1ecbnh tr\u1ef1c ti\u1ebfp t\u1edbi ch\u1ed1ng \u0103n m\u00f2n v\u00e0 t\u00ednh gia c\u00f4ng. \u0110\u00e0o s\u00e2u vai tr\u00f2 t\u1eebng nguy\u00ean t\u1ed1 s\u1ebd gi\u00fap b\u1ea1n \u0111\u1eb7c t\u1ea3 \u0111\u00fang y\u00eau c\u1ea7u v\u1eadt li\u1ec7u.<br \/>\n<!-- CLUSTER_PLACEHOLDER_5 --><\/p>\n<p>Trong h\u00e0n k\u1ebft c\u1ea5u d\u00e0y ho\u1eb7c l\u00e0m vi\u1ec7c \u1edf nhi\u1ec7t cao, bi\u1ebfn th\u1ec3 304L v\u00e0 304H th\u1ec3 hi\u1ec7n kh\u00e1c bi\u1ec7t: L \u0111\u1ec3 ch\u1ed1ng nh\u1ea1y c\u1ea3m \u0103n m\u00f2n sau h\u00e0n; H \u0111\u1ec3 ch\u1ecbu ch\u1ea3y d\u1ebbo cao nhi\u1ec7t. Ch\u1ecdn sai bi\u1ebfn th\u1ec3 d\u1ec5 d\u1eabn t\u1edbi h\u1ecfng s\u1edbm.<br \/>\n<!-- CLUSTER_PLACEHOLDER_6 --><\/p>\n<p>N\u1ebfu \u0111i\u1ec1u ki\u1ec7n l\u00e0m vi\u1ec7c l\u00e0 l\u00f2 \u0111\u1ed1t, bu\u1ed3ng s\u1ea5y, \u1ed1ng kh\u00f3i, l\u1ef1a ch\u1ecdn gi\u1eefa 310S, 309S v\u00e0 304H c\u1ea7n d\u1ef1a tr\u00ean gi\u1edbi h\u1ea1n oxy h\u00f3a, chu k\u1ef3 nhi\u1ec7t v\u00e0 chi ph\u00ed. M\u1ed7i m\u00e1c t\u1ed1i \u01b0u cho m\u1ed9t d\u1ea3i nhi\u1ec7t v\u00e0 ch\u1ebf \u0111\u1ed9 v\u1eadn h\u00e0nh nh\u1ea5t \u0111\u1ecbnh.<br \/>\n<!-- CLUSTER_PLACEHOLDER_7 --><\/p>\n<p>Khi c\u1ea7n k\u1ebft h\u1ee3p ch\u1ed1ng \u0103n m\u00f2n chloride r\u1ea5t t\u1ed1t v\u1edbi c\u01b0\u1eddng \u0111\u1ed9 cao, inox Duplex l\u00e0 \u0111i\u1ec3m c\u00e2n b\u1eb1ng l\u00fd t\u01b0\u1edfng. Tuy nhi\u00ean, thi c\u00f4ng \u0111\u00f2i h\u1ecfi ki\u1ec3m so\u00e1t nhi\u1ec7t h\u00e0n nghi\u00eam ng\u1eb7t v\u00e0 tu\u00e2n th\u1ee7 ti\u00eau chu\u1ea9n.<br \/>\n<!-- CLUSTER_PLACEHOLDER_8 --><\/p>\n<p>X\u1ebfp h\u1ea1ng ch\u1ed1ng \u0103n m\u00f2n gi\u00fap ra quy\u1ebft \u0111\u1ecbnh nhanh, nh\u01b0ng ph\u1ea3i x\u00e9t theo m\u00f4i tr\u01b0\u1eddng c\u1ee5 th\u1ec3: chloride, k\u1ebd h\u1edf, nhi\u1ec7t \u0111\u1ed9, pH. M\u1ed9t b\u1ea3ng so s\u00e1nh c\u00f3 ch\u00fa th\u00edch s\u1ebd tr\u00e1nh ng\u1ed9 nh\u1eadn ph\u1ed5 bi\u1ebfn khi ch\u1ecdn v\u1eadt li\u1ec7u.<br \/>\n<!-- CLUSTER_PLACEHOLDER_9 --><\/p>\n<p>Th\u1ef1c t\u1ebf hi\u1ec7n tr\u01b0\u1eddng \u0111\u00f2i h\u1ecfi nh\u1eadn di\u1ec7n nhanh: t\u1eeb th\u1eed nam ch\u00e2m, quan s\u00e1t b\u1ec1 m\u1eb7t, t\u1edbi ki\u1ec3m tra axit nh\u1eb9 v\u00e0 PMI c\u1ea7m tay. Nh\u1eefng m\u1eb9o n\u00e0y gi\u00fap b\u1ea1n tr\u00e1nh nh\u1ea7m 201 th\u00e0nh 304 \u2013 l\u1ed7i r\u1ea5t t\u1ed1n k\u00e9m v\u1ec1 sau.<br \/>\n<!-- CLUSTER_PLACEHOLDER_10 --><\/p>\n<h2 id=\"toc-4-ung-dung-thuc-te-va-khuyen-nghi-chuyen-gia\">\u1ee8ng d\u1ee5ng th\u1ef1c t\u1ebf v\u00e0 khuy\u1ebfn ngh\u1ecb chuy\u00ean gia<\/h2>\n<p>\u1ee8ng d\u1ee5ng ti\u00eau bi\u1ec3u t\u1ea1i Vi\u1ec7t Nam:<br \/>\n&#8211; Ki\u1ebfn tr\u00fac \u2013 ngo\u1ea1i th\u1ea5t H\u00e0 N\u1ed9i: lan can, m\u00e1i che, \u1ed1p m\u1eb7t d\u1ef1ng; \u01b0u ti\u00ean 304 v\u1edbi ho\u00e0n thi\u1ec7n hairline\/mirror; g\u1ea7n h\u1ed3 ho\u1eb7c \u0111\u01b0\u1eddng mu\u1ed1i \u2192 316.<br \/>\n&#8211; F&#038;B\/d\u01b0\u1ee3c: b\u1ed3n b\u1ec3, b\u00e0n thao t\u00e1c, \u1ed1ng ch\u1ea7n r\u1eeda; 304\/316 t\u00f9y CIP; 316L cho chloride nh\u1eb9, nhi\u1ec7t cao.<br \/>\n&#8211; Bi\u1ec3n v\u00e0 c\u1ea3ng: thang, bu l\u00f4ng, \u1ed1ng x\u1ea3; ch\u1ecdn 316\/316L ho\u1eb7c Duplex cho splash zone.<br \/>\n&#8211; L\u00f2 c\u00f4ng nghi\u1ec7p: 309S\/310S cho v\u00f9ng n\u00f3ng \u0111\u1ecf; 304H cho \u0111\u01b0\u1eddng \u1ed1ng h\u01a1i nhi\u1ec7t cao.<\/p>\n<p>Best practices v\u00e0 l\u1ed7i th\u01b0\u1eddng g\u1eb7p:<br \/>\n&#8211; Lu\u00f4n y\u00eau c\u1ea7u MTC\/CO-CQ; tr\u00e1nh mua \u201c304 gi\u00e1 201\u201d.<br \/>\n&#8211; Thi\u1ebft k\u1ebf ch\u1ed1ng k\u1ebd h\u1edf, tho\u00e1t n\u01b0\u1edbc t\u1ed1t; x\u1eed l\u00fd th\u1ee5 \u0111\u1ed9ng (passivation) sau h\u00e0n v\u00e0 \u0111\u00e1nh b\u00f3ng.<br \/>\n&#8211; Ch\u1ecdn ho\u00e0n thi\u1ec7n \u0111\u00fang: 2B cho c\u00f4ng nghi\u1ec7p, HL\/mirror cho ki\u1ebfn tr\u00fac; b\u1ec1 m\u1eb7t c\u00e0ng th\u00f4 c\u00e0ng d\u1ec5 \u1ed1 b\u1ea9n ngo\u00e0i tr\u1eddi.<br \/>\n&#8211; D\u00f9ng ph\u1ee5 ki\u1ec7n \u0111\u1ed3ng v\u1eadt li\u1ec7u; tr\u00e1nh c\u1eb7p \u0111\u00f4i Galvanic v\u1edbi th\u00e9p carbon m\u00e0 kh\u00f4ng c\u00e1ch \u0111i\u1ec7n.<br \/>\n&#8211; Ki\u1ec3m so\u00e1t nhi\u1ec7t h\u00e0n, ch\u1ecdn que ph\u00f9 h\u1ee3p (ER308L\/316L); l\u00e0m s\u1ea1ch x\u1ec9 h\u00e0n v\u00e0 v\u00f9ng \u1ea3nh h\u01b0\u1edfng nhi\u1ec7t.<\/p>\n<h2 id=\"toc-5-ket-luan-va-buoc-tiep-theo\">K\u1ebft lu\u1eadn v\u00e0 b\u01b0\u1edbc ti\u1ebfp theo<\/h2>\n<p>Ch\u1ecdn \u0111\u00fang m\u00e1c inox l\u00e0 quy\u1ebft \u0111\u1ecbnh k\u1ef9 thu\u1eadt \u2013 kinh t\u1ebf: t\u1ed1i \u01b0u ch\u1ed1ng \u0103n m\u00f2n theo m\u00f4i tr\u01b0\u1eddng, \u0111\u1ea3m b\u1ea3o gia c\u00f4ng\/h\u00e0n thu\u1eadn l\u1ee3i v\u00e0 gi\u1ea3m chi ph\u00ed v\u00f2ng \u0111\u1eddi. H\u00e3y d\u00f9ng khung \u0111\u00e1nh gi\u00e1 g\u1ed3m m\u00f4i tr\u01b0\u1eddng (chloride, pH, nhi\u1ec7t), PREN, \u0111\u1ed9 d\u00e0y, ph\u01b0\u01a1ng ph\u00e1p h\u00e0n v\u00e0 y\u00eau c\u1ea7u ho\u00e0n thi\u1ec7n \u0111\u1ec3 ch\u1ed1t v\u1eadt li\u1ec7u. Li\u00ean h\u1ec7 \u0111\u1ed9i ng\u0169 k\u1ef9 s\u01b0 v\u1eadt li\u1ec7u c\u1ee7a ch\u00fang t\u00f4i t\u1ea1i H\u00e0 N\u1ed9i \u0111\u1ec3 \u0111\u01b0\u1ee3c t\u01b0 v\u1ea5n mi\u1ec5n ph\u00ed, nh\u1eadn m\u1eabu b\u1ec1 m\u1eb7t v\u00e0 b\u00e1o gi\u00e1 t\u1ed3n kho inox 201\/304\/316\/430, m\u00e1c ch\u1ecbu nhi\u1ec7t v\u00e0 Duplex k\u00e8m MTC. C\u00f9ng b\u1ea1n ch\u1ed1t gi\u1ea3i ph\u00e1p \u0111\u00fang ngay t\u1eeb \u0111\u1ea7u.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Hi\u1ec3u \u0111\u00fang m\u00e1c inox, ch\u1ecdn chu\u1ea9n cho m\u00f4i tr\u01b0\u1eddng Vi\u1ec7t Nam: so s\u00e1nh 201, 304, 316, 430, Duplex; \u01b0u nh\u01b0\u1ee3c \u0111i\u1ec3m, ch\u1ed1ng \u0103n m\u00f2n, ch\u1ecbu nhi\u1ec7t v\u00e0 \u1ee9ng d\u1ee5ng th\u1ef1c t\u1ebf.<\/p>\n","protected":false},"author":7,"featured_media":1002,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[23],"tags":[],"class_list":["post-2013","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\/2013","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=2013"}],"version-history":[{"count":0,"href":"https:\/\/inoxcuongthinh.com\/inct\/wp\/v2\/posts\/2013\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/inoxcuongthinh.com\/inct\/wp\/v2\/media\/1002"}],"wp:attachment":[{"href":"https:\/\/inoxcuongthinh.com\/inct\/wp\/v2\/media?parent=2013"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/inoxcuongthinh.com\/inct\/wp\/v2\/categories?post=2013"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/inoxcuongthinh.com\/inct\/wp\/v2\/tags?post=2013"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}