{"id":1603,"date":"2026-01-27T12:34:42","date_gmt":"2026-01-27T05:34:42","guid":{"rendered":"https:\/\/inoxcuongthinh.com\/chon-inox-cho-ket-cau-chiu-luc-tieu-chi-ky-thuat-quan-trong\/"},"modified":"2026-01-27T12:34:42","modified_gmt":"2026-01-27T05:34:42","slug":"chon-inox-cho-ket-cau-chiu-luc-tieu-chi-ky-thuat-quan-trong","status":"publish","type":"post","link":"https:\/\/inoxcuongthinh.com\/chon-inox-cho-ket-cau-chiu-luc-tieu-chi-ky-thuat-quan-trong\/","title":{"rendered":"Ch\u1ecdn inox cho k\u1ebft c\u1ea5u ch\u1ecbu l\u1ef1c: ti\u00eau ch\u00ed k\u1ef9 thu\u1eadt quan tr\u1ecdng"},"content":{"rendered":"<div class=\"custom-toc\">\n<h3>N\u1ed9i dung ch\u00ednh<\/h3>\n<ul>\n<li><a href=\"#toc-0-nhung-yeu-cau-cot-loi-voi-ket-cau-inox-chiu-luc\">Nh\u1eefng y\u00eau c\u1ea7u c\u1ed1t l\u00f5i v\u1edbi k\u1ebft c\u1ea5u inox ch\u1ecbu l\u1ef1c<\/a><\/li>\n<li><a href=\"#toc-1-8-tieu-chi-ky-thuat-can-quan-tam-va-cach-ap-dung\">8 ti\u00eau ch\u00ed k\u1ef9 thu\u1eadt c\u1ea7n quan t\u00e2m (v\u00e0 c\u00e1ch \u00e1p d\u1ee5ng)<\/a><\/li>\n<li><a href=\"#toc-2-quy-trinh-chon-inox-chiu-luc-theo-buoc\">Quy tr\u00ecnh ch\u1ecdn inox ch\u1ecbu l\u1ef1c theo b\u01b0\u1edbc<\/a><\/li>\n<li><a href=\"#toc-3-so-sanh-nhanh-cac-mac-inox-pho-bien-cho-ket-cau\">So s\u00e1nh nhanh c\u00e1c m\u00e1c inox ph\u1ed5 bi\u1ebfn cho k\u1ebft c\u1ea5u<\/a><\/li>\n<li><a href=\"#toc-4-vi-du-tinh-nhanh-chon-dam-hop-inox-cho-san-thao-ta\">V\u00ed d\u1ee5 t\u00ednh nhanh: ch\u1ecdn d\u1ea7m h\u1ed9p inox cho s\u00e0n thao t\u00e1c 3 m<\/a><\/li>\n<li><a href=\"#toc-5-be-mat-hoan-thien-va-bao-tri\">B\u1ec1 m\u1eb7t, ho\u00e0n thi\u1ec7n v\u00e0 b\u1ea3o tr\u00ec<\/a><\/li>\n<li><a href=\"#toc-6-kiem-soat-chat-luong-va-chung-chi\">Ki\u1ec3m so\u00e1t ch\u1ea5t l\u01b0\u1ee3ng v\u00e0 ch\u1ee9ng ch\u1ec9<\/a><\/li>\n<li><a href=\"#toc-7-chi-phi-va-toi-uu-tong-the\">Chi ph\u00ed v\u00e0 t\u1ed1i \u01b0u t\u1ed5ng th\u1ec3<\/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>L\u1ef1a ch\u1ecdn inox cho k\u1ebft c\u1ea5u ch\u1ecbu l\u1ef1c l\u00e0 quy\u1ebft \u0111\u1ecbnh k\u1ef9 thu\u1eadt \u1ea3nh h\u01b0\u1edfng tr\u1ef1c ti\u1ebfp \u0111\u1ebfn \u0111\u1ed9 b\u1ec1n, an to\u00e0n v\u00e0 chi ph\u00ed v\u00f2ng \u0111\u1eddi. B\u00e0i vi\u1ebft n\u00e0y \u0111i th\u1eb3ng v\u00e0o c\u00e1c ti\u00eau ch\u00ed quan tr\u1ecdng nh\u1ea5t \u0111\u1ec3 ch\u1ecdn m\u00e1c inox, d\u1ea1ng s\u1ea3n ph\u1ea9m, ph\u01b0\u01a1ng \u00e1n gia c\u00f4ng v\u00e0 ki\u1ec3m so\u00e1t ch\u1ea5t l\u01b0\u1ee3ng cho d\u1ea7m, c\u1ed9t, khung, s\u00e0n thao t\u00e1c, gi\u00e0n m\u00e1i\u2026 trong \u0111i\u1ec1u ki\u1ec7n m\u00f4i tr\u01b0\u1eddng th\u1ef1c t\u1ebf \u1edf Vi\u1ec7t Nam. \u0110\u00e2y l\u00e0 m\u1ed9t m\u1ea3nh gh\u00e9p c\u1ed1t l\u00f5i trong b\u1ee9c tranh l\u1edbn v\u1ec1 c\u00e1ch ch\u1ecdn inox theo m\u00f4i tr\u01b0\u1eddng, m\u1ee5c \u0111\u00edch v\u00e0 ng\u00e2n s\u00e1ch, nh\u01b0ng n\u1ed9i dung d\u01b0\u1edbi \u0111\u00e2y \u0111\u1ee7 \u0111\u1ec3 b\u1ea1n t\u1ef1 tin ra quy\u1ebft \u0111\u1ecbnh cho h\u1ea1ng m\u1ee5c ch\u1ecbu l\u1ef1c.<\/p>\n<h2 id=\"toc-0-nhung-yeu-cau-cot-loi-voi-ket-cau-inox-chiu-luc\">Nh\u1eefng y\u00eau c\u1ea7u c\u1ed1t l\u00f5i v\u1edbi k\u1ebft c\u1ea5u inox ch\u1ecbu l\u1ef1c<\/h2>\n<p>&#8211; An to\u00e0n k\u1ebft c\u1ea5u: \u0111\u1ee7 c\u01b0\u1eddng \u0111\u1ed9 (0.2% proof strength Rp0.2), \u0111\u1ed9 c\u1ee9ng (E), \u1ed5n \u0111\u1ecbnh (ch\u1ed1ng o\u1eb1n, d\u1eb9t, m\u1ea5t \u1ed5n \u0111\u1ecbnh c\u1ee5c b\u1ed9).<br \/>\n&#8211; \u0110\u1ed9 b\u1ec1n m\u00f4i tr\u01b0\u1eddng: ch\u1ed1ng \u0103n m\u00f2n \u0111i\u1ec3m, k\u1ebd h\u1edf, SCC (n\u1ee9t do \u1ee9ng su\u1ea5t trong m\u00f4i tr\u01b0\u1eddng chloride), m\u1ecfi.<br \/>\n&#8211; Kh\u1ea3 n\u0103ng h\u00e0n v\u00e0 gia c\u00f4ng: kh\u00f4ng suy gi\u1ea3m c\u01a1 t\u00ednh sau h\u00e0n, kh\u00f4ng nh\u1ea1y c\u1ea3m \u0103n m\u00f2n li\u00ean tinh.<br \/>\n&#8211; T\u00ednh kh\u1ea3 d\u1ee5ng v\u1eadt li\u1ec7u: m\u00e1c th\u00e9p, k\u00edch th\u01b0\u1edbc, ti\u00eau chu\u1ea9n s\u1ea3n xu\u1ea5t s\u1eb5n c\u00f3 \u1edf th\u1ecb tr\u01b0\u1eddng.<br \/>\n&#8211; Chi ph\u00ed v\u00f2ng \u0111\u1eddi: c\u00e2n b\u1eb1ng gi\u00e1 v\u1eadt li\u1ec7u \u2013 chi ph\u00ed ch\u1ebf t\u1ea1o \u2013 b\u1ea3o tr\u00ec \u2013 tu\u1ed5i th\u1ecd.<\/p>\n<h2 id=\"toc-1-8-tieu-chi-ky-thuat-can-quan-tam-va-cach-ap-dung\">8 ti\u00eau ch\u00ed k\u1ef9 thu\u1eadt c\u1ea7n quan t\u00e2m (v\u00e0 c\u00e1ch \u00e1p d\u1ee5ng)<\/h2>\n<h3>1) C\u01a1 t\u00ednh t\u1ed1i thi\u1ec3u v\u00e0 m\u00f4 \u0111un \u0111\u00e0n h\u1ed3i<\/h3>\n<p>&#8211; Tham s\u1ed1 ch\u00ednh: Rp0.2 (gi\u1edbi h\u1ea1n ch\u1ea3y quy \u01b0\u1edbc), Rm (\u0111\u1ed9 b\u1ec1n k\u00e9o), E (m\u00f4 \u0111un \u0111\u00e0n h\u1ed3i ~ 193 GPa v\u1edbi austenitic, ~200 GPa v\u1edbi duplex).<br \/>\n&#8211; Gi\u00e1 tr\u1ecb tham kh\u1ea3o (theo ASTM\/EN, v\u1eadt li\u1ec7u \u1edf tr\u1ea1ng th\u00e1i \u1ee7):<br \/>\n  &#8211; 304\/304L (EN 1.4301\/1.4307): Rp0.2 \u2248 205 MPa, Rm \u2248 515 MPa.<br \/>\n  &#8211; 316\/316L (EN 1.4401\/1.4404): Rp0.2 \u2248 205 MPa, Rm \u2248 515 MPa.<br \/>\n  &#8211; 201 (austenitic Mn-Ni th\u1ea5p): Rp0.2 \u2248 240\u2013275 MPa, Rm \u2248 560\u2013680 MPa (bi\u1ebfn thi\u00ean theo th\u00e0nh ph\u1ea7n).<br \/>\n  &#8211; Duplex 2304 (EN 1.4362): Rp0.2 \u2248 400\u2013450 MPa, Rm \u2248 600\u2013800 MPa.<br \/>\n  &#8211; Duplex 2205 (EN 1.4462, UNS S32205\/S31803): Rp0.2 \u2248 450\u2013550 MPa, Rm \u2248 620\u2013800 MPa.<br \/>\n  &#8211; 17-4PH (AISI 630, UNS S17400, tr\u1ea1ng th\u00e1i H900): Rp0.2 \u2248 1000\u20131170 MPa (d\u00f9ng \u0111\u1eb7c th\u00f9, kh\u00f4ng ph\u1ed5 bi\u1ebfn cho k\u1ebft c\u1ea5u h\u00e0n l\u1edbn).<br \/>\n&#8211; G\u1ee3i \u00fd: V\u1edbi nh\u1ecbp l\u1edbn v\u00e0 y\u00eau c\u1ea7u gi\u1ea3m chi\u1ec1u d\u00e0y, duplex 2205 gi\u00fap gi\u1ea3m kh\u1ed1i l\u01b0\u1ee3ng nh\u1edd Rp0.2 cao. Tuy nhi\u00ean E c\u1ee7a inox x\u1ea5p x\u1ec9 th\u00e9p carbon n\u00ean gi\u1edbi h\u1ea1n v\u00f5ng th\u01b0\u1eddng chi ph\u1ed1i, c\u1ea7n t\u0103ng m\u00f4 men qu\u00e1n t\u00ednh (ch\u1ecdn ti\u1ebft di\u1ec7n l\u1edbn h\u01a1n) thay v\u00ec ch\u1ec9 d\u1ef1a v\u00e0o m\u00e1c c\u00f3 Rp0.2 cao.<\/p>\n<h3>2) Kh\u1ea3 n\u0103ng ch\u1ed1ng \u0103n m\u00f2n theo m\u00f4i tr\u01b0\u1eddng (d\u00f9ng PREN l\u00e0m ch\u1ec9 b\u00e1o)<\/h3>\n<p>&#8211; PREN \u2248 %Cr + 3.3\u00d7%Mo + 16\u00d7%N (c\u00e0ng cao c\u00e0ng ch\u1ed1ng pitting t\u1ed1t).<br \/>\n  &#8211; 304\/304L: PREN \u2248 18\u201319 \u2192 trong nh\u00e0 kh\u00f4, ngo\u1ea1i th\u1ea5t \u0111\u00f4 th\u1ecb n\u1ed9i \u0111\u1ecba.<br \/>\n  &#8211; 316\/316L: PREN \u2248 24\u201326 \u2192 ven bi\u1ec3n, phun mu\u1ed1i nh\u1eb9, h\u1ed3 b\u01a1i (\u2264 50\u00b0C).<br \/>\n  &#8211; 2304: PREN \u2248 26\u201329 \u2192 t\u01b0\u01a1ng \u0111\u01b0\u01a1ng\/nh\u1ec9nh h\u01a1n 316 v\u1ec1 pitting, chi ph\u00ed c\u1ea1nh tranh.<br \/>\n  &#8211; 2205: PREN \u2248 34\u201336 \u2192 ven bi\u1ec3n kh\u1eafc nghi\u1ec7t, n\u01b0\u1edbc m\u1eb7n \u1ea5m, c\u00f4ng nghi\u1ec7p chloride.<br \/>\n&#8211; L\u01b0u \u00fd:<br \/>\n  &#8211; 304 d\u1ec5 SCC trong chloride \u1edf T > 50\u00b0C; 316 t\u1ed1t h\u01a1n nh\u01b0ng v\u1eabn r\u1ee7i ro \u1edf nhi\u1ec7t \u0111\u1ed9 cao. Duplex r\u1ea5t kh\u00e1ng SCC.<br \/>\n  &#8211; 201 nh\u1ea1y chloride h\u01a1n 304; c\u00e2n nh\u1eafc k\u1ef9 khi d\u00f9ng ngo\u00e0i tr\u1eddi\/ven bi\u1ec3n.<br \/>\n  &#8211; Ho\u00e0n thi\u1ec7n b\u1ec1 m\u1eb7t m\u1ecbn (2B, 220G, bead-blast m\u1ecbn) v\u00e0 h\u1ea1n ch\u1ebf k\u1ebd h\u1edf s\u1ebd c\u1ea3i thi\u1ec7n \u0111\u00e1ng k\u1ec3 \u0111\u1ed9 b\u1ec1n \u0103n m\u00f2n.<\/p>\n<h3>3) H\u00e0n, v\u00f9ng \u1ea3nh h\u01b0\u1edfng nhi\u1ec7t v\u00e0 x\u1eed l\u00fd sau h\u00e0n<\/h3>\n<p>&#8211; D\u00f9ng m\u00e1c th\u1ea5p C (L) \u0111\u1ec3 tr\u00e1nh \u0103n m\u00f2n li\u00ean tinh; ch\u1ecdn que\/d\u00e2y h\u00e0n t\u01b0\u01a1ng th\u00edch:<br \/>\n  &#8211; 304L \u2192 ER308L; 316L \u2192 ER316L; 2205 \u2192 ER2209.<br \/>\n&#8211; Qu\u1ea3n l\u00fd nhi\u1ec7t \u0111\u1ea7u v\u00e0o \u0111\u1ec3 h\u1ea1n ch\u1ebf bi\u1ebfn d\u1ea1ng v\u00e0 gi\u1eef vi c\u1ea5u tr\u00fac (\u0111\u1eb7c bi\u1ec7t v\u1edbi duplex: ki\u1ec3m so\u00e1t ferrite 25\u201370% trong m\u1ed1i h\u00e0n).<br \/>\n&#8211; Sau h\u00e0n: t\u1ea9y g\u1ec9 \u2013 pickling, th\u1ee5 \u0111\u1ed9ng h\u00f3a, l\u00e0m s\u1ea1ch s\u1eaft ngo\u1ea1i lai; m\u00e0i m\u1ecbn m\u1ed1i h\u00e0n \u0111\u1ec3 n\u00e2ng tu\u1ed5i th\u1ecd m\u1ecfi v\u00e0 ch\u1ed1ng pitting.<\/p>\n<h3>4) D\u1ea1ng s\u1ea3n ph\u1ea9m v\u00e0 ti\u00eau chu\u1ea9n v\u1eadt li\u1ec7u b\u1eaft bu\u1ed9c<\/h3>\n<p>&#8211; T\u1ea5m\/plate: ASTM A240\/A240M; Thanh tr\u00f2n\/thanh d\u1eb9t: ASTM A276\/A479; \u1ed0ng \u00e1p l\u1ef1c: ASTM A312; \u1ed0ng c\u01a1 kh\u00ed\/trang tr\u00ed: ASTM A554; H\u00ecnh d\u1ea1ng t\u1ed5ng qu\u00e1t: ASTM A484.<br \/>\n&#8211; Khuy\u1ebfn ngh\u1ecb:<br \/>\n  &#8211; H\u1ea1ng m\u1ee5c ch\u1ecbu l\u1ef1c \u01b0u ti\u00ean \u1ed1ng theo ASTM A312 ho\u1eb7c \u1ed1ng c\u01a1 kh\u00ed A554 c\u00f3 MTC r\u00f5 r\u00e0ng, m\u00e1c \u0111\u00fang chu\u1ea9n, c\u01a1 t\u00ednh c\u00f4ng b\u1ed1.<br \/>\n  &#8211; Tr\u00e1nh d\u00f9ng \u1ed1ng\/h\u1ed9p \u201ctrang tr\u00ed\u201d m\u1ecfng, kh\u00f4ng ch\u1ee9ng ch\u1ec9 cho k\u1ebft c\u1ea5u ch\u00ednh.<br \/>\n  &#8211; Lu\u00f4n y\u00eau c\u1ea7u Mill Test Certificate (th\u00e0nh ph\u1ea7n h\u00f3a h\u1ecdc, c\u01a1 t\u00ednh, ti\u00eau chu\u1ea9n) v\u00e0 PMI \u0111\u1ecbnh k\u1ef3.<\/p>\n<h3>5) \u1ed4n \u0111\u1ecbnh t\u1ed5ng th\u1ec3 v\u00e0 m\u1ea5t \u1ed5n \u0111\u1ecbnh c\u1ee5c b\u1ed9<\/h3>\n<p>&#8211; V\u1edbi ti\u1ebft di\u1ec7n m\u1ecfng (\u1ed1ng\/h\u1ed9p m\u1ecfng th\u00e0nh), m\u1ea5t \u1ed5n \u0111\u1ecbnh c\u1ee5c b\u1ed9 khi n\u00e9n\/\u00e9p c\u1ee5c b\u1ed9 c\u00f3 th\u1ec3 chi ph\u1ed1i. Ch\u1ecdn chi\u1ec1u d\u00e0y th\u00e0nh \u0111\u1ee7 l\u1edbn (b\/t h\u1ee3p l\u00fd) theo gi\u1edbi h\u1ea1n trong EN 1993-1-4 ho\u1eb7c h\u01b0\u1edbng d\u1eabn SCI\/Euro Inox.<br \/>\n&#8211; Tr\u00e1nh l\u1ed7 khoan l\u1edbn g\u1ea7n v\u00f9ng ch\u1ecbu n\u00e9n; d\u00f9ng g\u00e2n t\u0103ng c\u1ee9ng t\u1ea1i g\u1ed1i, ch\u1ed7 li\u00ean k\u1ebft.<\/p>\n<h3>6) M\u1ecfi v\u00e0 rung \u0111\u1ed9ng<\/h3>\n<p>&#8211; K\u1ebft c\u1ea5u ch\u1ecbu t\u1ea3i chu k\u1ef3 (c\u1ea7u thang c\u00f4ng nghi\u1ec7p, b\u1ec7 m\u00e1y, s\u00e0n rung): \u01b0u ti\u00ean b\u1ec1 m\u1eb7t m\u1ed1i h\u00e0n m\u1ecbn, b\u00e1n k\u00ednh l\u01b0\u1ee3n \u0111\u1ee7, tr\u00e1nh kh\u00eda c\u1ea1nh nh\u1ecdn.<br \/>\n&#8211; Duplex c\u00f3 l\u1ee3i v\u1ec1 c\u01b0\u1eddng \u0111\u1ed9 m\u1ecfi; tuy nhi\u00ean chi ti\u1ebft m\u1ed1i h\u00e0n v\u1eabn l\u00e0 \u0111i\u1ec3m y\u1ebfu c\u1ea7n x\u1eed l\u00fd t\u1ed1t.<\/p>\n<h3>7) \u1ea2nh h\u01b0\u1edfng nhi\u1ec7t v\u00e0 h\u1ecfa ho\u1ea1n<\/h3>\n<p>&#8211; Inox gi\u1eef c\u01b0\u1eddng \u0111\u1ed9 t\u1ed1t h\u01a1n th\u00e9p carbon \u1edf nhi\u1ec7t \u0111\u1ed9 cao v\u00e0 t\u1ea1o l\u1edbp oxit b\u1ea3o v\u1ec7; song austenitic c\u00f3 h\u1ec7 s\u1ed1 gi\u00e3n n\u1edf nhi\u1ec7t l\u1edbn (~16\u201317 \u00b5m\/m\u00b7K). Thi\u1ebft k\u1ebf khe co gi\u00e3n cho nh\u1ecbp d\u00e0i, chi ti\u1ebft li\u00ean k\u1ebft tr\u01b0\u1ee3t.<br \/>\n&#8211; Tham kh\u1ea3o bi\u1ec3u \u0111\u1ed3 gi\u1ea3m c\u01b0\u1eddng \u0111\u1ed9 theo nhi\u1ec7t \u0111\u1ed9 trong EN 1993-1-2 v\u00e0 EN 1993-1-4.<\/p>\n<h3>8) Li\u00ean k\u1ebft, bu l\u00f4ng v\u00e0 \u0103n m\u00f2n \u0111i\u1ec7n h\u00f3a<\/h3>\n<p>&#8211; Bu l\u00f4ng inox theo ISO 3506: A2-70 (304), A4-70\/80 (316). V\u1edbi t\u1ea3i cao, c\u00e2n nh\u1eafc bu l\u00f4ng A4-80 v\u00e0 ki\u1ec3m tra ma s\u00e1t n\u1ebfu d\u00f9ng li\u00ean k\u1ebft ma s\u00e1t.<br \/>\n&#8211; C\u00e1ch ly inox v\u1edbi th\u00e9p carbon\/nh\u00f4m b\u1eb1ng \u0111\u1ec7m c\u00e1ch \u0111i\u1ec7n \u0111\u1ec3 tr\u00e1nh \u0103n m\u00f2n \u0111i\u1ec7n h\u00f3a, \u0111\u1eb7c bi\u1ec7t \u1edf m\u00f4i tr\u01b0\u1eddng \u1ea9m\/bi\u1ec3n.<br \/>\n&#8211; D\u00f9ng keo\/\u0111\u1ec7m ch\u1ed1ng k\u1ebd h\u1edf t\u1ea1i ch\u1ed7 gh\u00e9p ch\u1ed3ng.<\/p>\n<h2 id=\"toc-2-quy-trinh-chon-inox-chiu-luc-theo-buoc\">Quy tr\u00ecnh ch\u1ecdn inox ch\u1ecbu l\u1ef1c theo b\u01b0\u1edbc<\/h2>\n<p>1) X\u00e1c \u0111\u1ecbnh t\u1ea3i tr\u1ecdng v\u00e0 ti\u00eau ch\u00ed s\u1eed d\u1ee5ng: t\u0129nh\/\u0111\u1ed9ng, s\u1ed1 chu k\u1ef3, gi\u1edbi h\u1ea1n v\u00f5ng (th\u01b0\u1eddng L\/200\u2013L\/360), y\u00eau c\u1ea7u th\u1ea9m m\u1ef9\/b\u1ec1 m\u1eb7t.<br \/>\n2) \u0110\u00e1nh gi\u00e1 m\u00f4i tr\u01b0\u1eddng: trong nh\u00e0 kh\u00f4; ngo\u00e0i tr\u1eddi n\u1ed9i \u0111\u1ecba; ven bi\u1ec3n (kho\u1ea3ng c\u00e1ch \u0111\u1ebfn bi\u1ec3n, phun mu\u1ed1i); n\u01b0\u1edbc clo; h\u00f3a ch\u1ea5t; nhi\u1ec7t \u0111\u1ed9 v\u1eadn h\u00e0nh.<br \/>\n3) Ch\u1ecdn nh\u00f3m m\u00e1c:<br \/>\n   &#8211; Trong nh\u00e0 kh\u00f4, kh\u00f4ng h\u00f3a ch\u1ea5t: 304L; c\u00f3 th\u1ec3 c\u00e2n nh\u1eafc 201 cho c\u1ea5u ki\u1ec7n ph\u1ee5, nh\u01b0ng th\u1eadn tr\u1ecdng ch\u1ea5t l\u01b0\u1ee3ng v\u00e0 \u0103n m\u00f2n.<br \/>\n   &#8211; Ngo\u00e0i tr\u1eddi n\u1ed9i \u0111\u1ecba\/\u0111\u00f4 th\u1ecb: 304L ho\u1eb7c 304L d\u00e0y h\u01a1n, b\u1ec1 m\u1eb7t m\u1ecbn.<br \/>\n   &#8211; Ven bi\u1ec3n\/phun mu\u1ed1i\/chloride: 316L ho\u1eb7c lean duplex 2304; v\u00f9ng bi\u1ec3n kh\u1eafc nghi\u1ec7t, nhi\u1ec7t \u0111\u1ed9 cao \u2192 2205.<br \/>\n   &#8211; H\u00f3a ch\u1ea5t ch\u1ee9a chloride\/axit: \u0111\u00e1nh gi\u00e1 chi ti\u1ebft; 2205 ho\u1eb7c si\u00eau duplex\/super austenitic (\u0111\u1eb7t h\u00e0ng \u0111\u1eb7c th\u00f9).<br \/>\n4) Ch\u1ecdn d\u1ea1ng s\u1ea3n ph\u1ea9m theo ti\u00eau chu\u1ea9n: A240 (t\u1ea5m), A312 (\u1ed1ng), A276 (thanh), A554 (\u1ed1ng c\u01a1 kh\u00ed) v\u1edbi MTC \u0111\u1ea7y \u0111\u1ee7.<br \/>\n5) Thi\u1ebft k\u1ebf ti\u1ebft di\u1ec7n: ki\u1ec3m tra b\u1ec1n \u2013 \u1ed5n \u0111\u1ecbnh \u2013 v\u00f5ng \u2013 m\u1ecfi theo EN 1993-1-4 ho\u1eb7c Design Manual for Structural Stainless Steel (SCI\/Euro Inox).<br \/>\n6) Chi ti\u1ebft li\u00ean k\u1ebft v\u00e0 quy tr\u00ecnh h\u00e0n: ch\u1ecdn v\u1eadt li\u1ec7u h\u00e0n, quy tr\u00ecnh WPS\/PQR; t\u1ea9y \u2013 th\u1ee5 \u0111\u1ed9ng h\u00f3a sau h\u00e0n; ki\u1ec3m so\u00e1t bi\u1ebfn d\u1ea1ng.<br \/>\n7) Ki\u1ec3m so\u00e1t ch\u1ea5t l\u01b0\u1ee3ng: PMI, th\u1eed k\u00e9o x\u00e1c su\u1ea5t, \u0111o ferrite v\u00f9ng h\u00e0n (v\u1edbi duplex), ki\u1ec3m tra b\u1ec1 m\u1eb7t, \u0111\u1ed9 d\u00e0y th\u1ef1c, ch\u1ee9ng ch\u1ec9 l\u00f4.<\/p>\n<h2 id=\"toc-3-so-sanh-nhanh-cac-mac-inox-pho-bien-cho-ket-cau\">So s\u00e1nh nhanh c\u00e1c m\u00e1c inox ph\u1ed5 bi\u1ebfn cho k\u1ebft c\u1ea5u<\/h2>\n<p>&#8211; 201:<br \/>\n  &#8211; \u01afu: gi\u00e1 th\u1ea5p, \u0111\u1ed9 b\u1ec1n k\u00e9o cao khi c\u00e1n ngu\u1ed9i.<br \/>\n  &#8211; Nh\u01b0\u1ee3c: ch\u1ed1ng \u0103n m\u00f2n k\u00e9m h\u01a1n 304; bi\u1ebfn \u0111\u1ed9ng th\u00e0nh ph\u1ea7n th\u1ecb tr\u01b0\u1eddng; kh\u00f4ng khuy\u1ebfn ngh\u1ecb cho ngo\u00e0i tr\u1eddi\/ven bi\u1ec3n v\u00e0 k\u1ebft c\u1ea5u ch\u00ednh h\u00e0n ch\u1ecbu l\u1ef1c cao.<br \/>\n&#8211; 304\/304L:<br \/>\n  &#8211; \u01afu: th\u00f4ng d\u1ee5ng, d\u1ec5 h\u00e0n, c\u01a1 t\u00ednh \u1ed5n \u0111\u1ecbnh, ngu\u1ed3n h\u00e0ng d\u1ed3i d\u00e0o.<br \/>\n  &#8211; \u1ee8ng d\u1ee5ng: s\u00e0n, khung, d\u1ea7m trong nh\u00e0 ho\u1eb7c ngo\u1ea1i th\u1ea5t n\u1ed9i \u0111\u1ecba; c\u1ea7n ho\u00e0n thi\u1ec7n b\u1ec1 m\u1eb7t t\u1ed1t.<br \/>\n&#8211; 316\/316L:<br \/>\n  &#8211; \u01afu: Mo t\u0103ng ch\u1ed1ng pitting; d\u00f9ng t\u1ed1t \u1edf ven bi\u1ec3n\/h\u1ed3 b\u01a1i.<br \/>\n  &#8211; \u1ee8ng d\u1ee5ng: m\u00e1i che, c\u1ea7u thang, lan can ch\u1ecbu gi\u00f3 mu\u1ed1i; chi ti\u1ebft ngo\u00e0i kh\u01a1i nh\u1eb9.<br \/>\n&#8211; Lean duplex 2304:<br \/>\n  &#8211; \u01afu: Rp0.2 cao h\u01a1n 316, ch\u1ed1ng pitting t\u01b0\u01a1ng \u0111\u01b0\u01a1ng\/nh\u1ec9nh h\u01a1n, gi\u00e3n n\u1edf nhi\u1ec7t th\u1ea5p h\u01a1n austenitic; gi\u00e1 c\u1ea1nh tranh.<br \/>\n  &#8211; \u1ee8ng d\u1ee5ng: d\u1ea7m\/c\u1ed9t ngo\u00e0i tr\u1eddi, ven bi\u1ec3n v\u1eeba; ti\u1ebft ki\u1ec7m chi\u1ec1u d\u00e0y.<br \/>\n&#8211; Duplex 2205:<br \/>\n  &#8211; \u01afu: c\u01b0\u1eddng \u0111\u1ed9 v\u00e0 ch\u1ed1ng \u0103n m\u00f2n v\u01b0\u1ee3t tr\u1ed9i; kh\u00e1ng SCC r\u1ea5t t\u1ed1t.<br \/>\n  &#8211; \u1ee8ng d\u1ee5ng: ven bi\u1ec3n kh\u1eafc nghi\u1ec7t, nh\u00e0 m\u00e1y mu\u1ed1i\/h\u00f3a ch\u1ea5t chloride, nh\u1ecbp l\u1edbn c\u1ea7n gi\u1ea3m kh\u1ed1i l\u01b0\u1ee3ng.<br \/>\n&#8211; 17-4PH:<br \/>\n  &#8211; \u01afu: c\u01b0\u1eddng \u0111\u1ed9 r\u1ea5t cao.<br \/>\n  &#8211; Nh\u01b0\u1ee3c: y\u00eau c\u1ea7u x\u1eed l\u00fd nhi\u1ec7t; nh\u1ea1y gi\u1ea3m dai va \u0111\u1eadp; kh\u00f4ng \u01b0u ti\u00ean cho k\u1ebft c\u1ea5u h\u00e0n quy m\u00f4 l\u1edbn ch\u1ecbu t\u1ea3i chu k\u1ef3; d\u00f9ng cho tr\u1ee5c, chi ti\u1ebft c\u01a1 kh\u00ed \u0111\u1eb7c bi\u1ec7t.<\/p>\n<h2 id=\"toc-4-vi-du-tinh-nhanh-chon-dam-hop-inox-cho-san-thao-ta\">V\u00ed d\u1ee5 t\u00ednh nhanh: ch\u1ecdn d\u1ea7m h\u1ed9p inox cho s\u00e0n thao t\u00e1c 3 m<\/h2>\n<p>&#8211; B\u00e0i to\u00e1n: Nh\u1ecbp 3 m, t\u1ea3i \u0111\u1ec1u 5 kN\/m (bao g\u1ed3m t\u0129nh + s\u1eed d\u1ee5ng), m\u00f4i tr\u01b0\u1eddng trong nh\u00e0 kh\u00f4. Gi\u1edbi h\u1ea1n v\u00f5ng L\/250 (~12 mm).<br \/>\n&#8211; Ch\u1ecdn m\u00e1c v\u1eadt li\u1ec7u: 304L (Rp0.2 \u2248 205 MPa, E \u2248 193 GPa).<br \/>\n&#8211; Ki\u1ec3m tra s\u01a1 b\u1ed9:<br \/>\n  &#8211; Momen l\u1edbn nh\u1ea5t ~ 5.625 kN\u00b7m.<br \/>\n  &#8211; Y\u00eau c\u1ea7u m\u00f4 men ch\u1ed1ng u\u1ed1n Z \u2248 45,000\u201350,000 mm\u00b3 v\u1edbi \u1ee9ng su\u1ea5t cho ph\u00e9p th\u1ef1c t\u1ebf.<br \/>\n&#8211; Ph\u01b0\u01a1ng \u00e1n ti\u1ebft di\u1ec7n \u0111\u1ec1 xu\u1ea5t (\u1ed1ng h\u1ed9p h\u00ecnh ch\u1eef nh\u1eadt, ti\u00eau chu\u1ea9n A554\/A312, c\u00f3 MTC):<br \/>\n  &#8211; 120\u00d760\u00d75 mm (h\u01b0\u1edbng 120 mm theo tr\u1ee5c m\u1ea1nh) cho Z \u2248 51,500 mm\u00b3, I \u2248 3.09\u00d710^6 mm^4.<br \/>\n  &#8211; K\u1ebft qu\u1ea3: \u1ee9ng su\u1ea5t u\u1ed1n th\u1ecfa; v\u00f5ng t\u00ednh to\u00e1n \u2248 8.8 mm < 12 mm \u2192 \u0111\u1ea1t.\n- Ghi ch\u00fa:\n  - N\u1ebfu ngo\u00e0i tr\u1eddi\/ven bi\u1ec3n nh\u1eb9: \u0111\u1ed5i m\u00e1c sang 316L ho\u1eb7c 2304 v\u1edbi ti\u1ebft di\u1ec7n t\u01b0\u01a1ng t\u1ef1.\n  - Ki\u1ec3m tra b\u1ed5 sung: \u1ed5n \u0111\u1ecbnh c\u1ee5c b\u1ed9 th\u00e0nh m\u1ecfng, chi ti\u1ebft g\u1ed1i\/kh\u1edbp n\u1ed1i, rung \u0111\u1ed9ng \u0111\u1ecba ph\u01b0\u01a1ng.\n\n\n\n<h2 id=\"toc-5-be-mat-hoan-thien-va-bao-tri\">B\u1ec1 m\u1eb7t, ho\u00e0n thi\u1ec7n v\u00e0 b\u1ea3o tr\u00ec<\/h2>\n<p>&#8211; Ch\u1ecdn b\u1ec1 m\u1eb7t 2B\/No.4\/220G ho\u1eb7c bead-blast m\u1ecbn cho ngo\u1ea1i th\u1ea5t; tr\u00e1nh b\u1ec1 m\u1eb7t qu\u00e1 th\u00f4 (t\u00edch mu\u1ed1i\/b\u1ee5i).<br \/>\n&#8211; Sau ch\u1ebf t\u1ea1o: t\u1ea9y \u2013 th\u1ee5 \u0111\u1ed9ng h\u00f3a to\u00e0n b\u1ed9 v\u00f9ng h\u00e0n; l\u00e0m s\u1ea1ch s\u1eaft ngo\u1ea1i lai; r\u1eeda \u0111\u1ecbnh k\u1ef3 \u1edf ven bi\u1ec3n \u0111\u1ec3 t\u0103ng tu\u1ed5i th\u1ecd.<br \/>\n&#8211; Tr\u00e1nh khe h\u1edf, t\u00fai n\u01b0\u1edbc; b\u1ed1 tr\u00ed tho\u00e1t n\u01b0\u1edbc, che ch\u1eafn phun mu\u1ed1i tr\u1ef1c ti\u1ebfp.<\/p>\n<h2 id=\"toc-6-kiem-soat-chat-luong-va-chung-chi\">Ki\u1ec3m so\u00e1t ch\u1ea5t l\u01b0\u1ee3ng v\u00e0 ch\u1ee9ng ch\u1ec9<\/h2>\n<p>&#8211; Y\u00eau c\u1ea7u MTC (heat number, th\u00e0nh ph\u1ea7n, c\u01a1 t\u00ednh, ti\u00eau chu\u1ea9n).<br \/>\n&#8211; PMI ng\u1eabu nhi\u00ean t\u1eebng l\u00f4; \u0111o chi\u1ec1u d\u00e0y th\u1ef1c; ki\u1ec3m tra h\u1ea1t m\u00e0i v\u00e0 khuy\u1ebft t\u1eadt b\u1ec1 m\u1eb7t.<br \/>\n&#8211; V\u1edbi duplex: ki\u1ec3m so\u00e1t quy tr\u00ecnh h\u00e0n (WPS\/PQR), \u0111o ferrite m\u1ed1i h\u00e0n, \u0103n m\u00f2n li\u00ean tinh sau h\u00e0n n\u1ebfu c\u1ea7n.<\/p>\n<h2 id=\"toc-7-chi-phi-va-toi-uu-tong-the\">Chi ph\u00ed v\u00e0 t\u1ed1i \u01b0u t\u1ed5ng th\u1ec3<\/h2>\n<p>&#8211; So s\u00e1nh theo v\u00f2ng \u0111\u1eddi: 316L\/duplex c\u00f3 gi\u00e1 v\u1eadt li\u1ec7u cao h\u01a1n nh\u01b0ng gi\u1ea3m b\u1ea3o tr\u00ec \u1edf ven bi\u1ec3n v\u00e0 duy tr\u00ec th\u1ea9m m\u1ef9, tr\u00e1nh thay th\u1ebf s\u1edbm.<br \/>\n&#8211; Duplex c\u00f3 th\u1ec3 gi\u1ea3m chi\u1ec1u d\u00e0y\/kh\u1ed1i l\u01b0\u1ee3ng nh\u1edd Rp0.2 cao \u2192 b\u00f9 chi ph\u00ed \u0111\u01a1n gi\u00e1\/kg.<br \/>\n&#8211; T\u1eadn d\u1ee5ng k\u00edch th\u01b0\u1edbc h\u00e0ng s\u1eb5n kho \u1edf H\u00e0 N\u1ed9i\/B\u1eafc Ninh\/H\u1ea3i Ph\u00f2ng \u0111\u1ec3 t\u1ed1i \u01b0u ti\u1ebfn \u0111\u1ed9 v\u00e0 gi\u00e1.<\/p>\n<h2 id=\"toc-8-nguon-tham-khao-chinh\">Ngu\u1ed3n tham kh\u1ea3o ch\u00ednh<\/h2>\n<p>&#8211; EN 1993-1-4: Design of steel structures \u2013 Stainless steels (Eurocode 3).<br \/>\n&#8211; SCI\/Euro Inox: Design Manual for Structural Stainless Steel, 4th Edition.<br \/>\n&#8211; ASTM A240, A276, A312, A554, A484 \u2013 Ti\u00eau chu\u1ea9n v\u1eadt li\u1ec7u inox.<br \/>\n&#8211; Nickel Institute: Guidelines for Selection of Stainless Steels.<br \/>\n&#8211; IMOA (International Molybdenum Association): Selecting Stainless Steels for Coastal Environments.<br \/>\n&#8211; ISO 3506: Mechanical properties of corrosion-resistant stainless steel fasteners.<\/p>\n<h2 id=\"toc-9-ket-luan\">K\u1ebft lu\u1eadn<\/h2>\n<p>&#8211; H\u00e3y ch\u1ecdn m\u00e1c inox theo t\u1ea3i tr\u1ecdng v\u00e0 m\u00f4i tr\u01b0\u1eddng: 304L cho trong nh\u00e0\/n\u1ed9i \u0111\u1ecba; 316L ho\u1eb7c 2304 cho ven bi\u1ec3n v\u1eeba; 2205 cho v\u00f9ng chloride kh\u1eafc nghi\u1ec7t ho\u1eb7c c\u1ea7n ti\u1ebft ki\u1ec7m chi\u1ec1u d\u00e0y.<br \/>\n&#8211; Ki\u1ec3m so\u00e1t h\u00e0n v\u00e0 ho\u00e0n thi\u1ec7n b\u1ec1 m\u1eb7t quy\u1ebft \u0111\u1ecbnh tu\u1ed5i th\u1ecd m\u1ecfi v\u00e0 ch\u1ed1ng pitting; lu\u00f4n t\u1ea9y \u2013 th\u1ee5 \u0111\u1ed9ng h\u00f3a sau h\u00e0n.<br \/>\n&#8211; D\u00f9ng v\u1eadt li\u1ec7u \u0111\u00fang ti\u00eau chu\u1ea9n (A240\/A312\/A276\/A554) k\u00e8m MTC; tr\u00e1nh d\u00f9ng \u1ed1ng trang tr\u00ed m\u1ecfng cho k\u1ebft c\u1ea5u ch\u00ednh.<br \/>\n&#8211; Thi\u1ebft k\u1ebf kh\u00f4ng ch\u1ec9 \u201c\u0111\u1ee7 b\u1ec1n\u201d m\u00e0 c\u00f2n \u201c\u0111\u1ee7 c\u1ee9ng\u201d v\u00e0 \u201c\u1ed5n \u0111\u1ecbnh\u201d; nhi\u1ec1u tr\u01b0\u1eddng h\u1ee3p v\u00f5ng v\u00e0 m\u1ea5t \u1ed5n \u0111\u1ecbnh c\u1ee5c b\u1ed9 m\u1edbi l\u00e0 \u0111i\u1ec1u ki\u1ec7n chi ph\u1ed1i.<br \/>\n&#8211; T\u1ed1i \u01b0u theo v\u00f2ng \u0111\u1eddi: ch\u1ecdn \u0111\u00fang m\u00e1c ngay t\u1eeb \u0111\u1ea7u s\u1ebd ti\u1ebft ki\u1ec7m t\u1ed5ng chi ph\u00ed.<\/p>\n<p>C\u1ea7n t\u01b0 v\u1ea5n m\u00e1c inox, ti\u00eau chu\u1ea9n s\u1ea3n ph\u1ea9m v\u00e0 b\u00e1o gi\u00e1 t\u1ed1t nh\u1ea5t cho h\u1ea1ng m\u1ee5c ch\u1ecbu l\u1ef1c c\u1ee7a b\u1ea1n? H\u00e3y li\u00ean h\u1ec7 Inox Cuong Thinh:<br \/>\n&#8211; Hotline: 0343.417.281<br \/>\n&#8211; Email: inoxcongnghiep.cuongthinh@gmail.com<\/p>\n","protected":false},"excerpt":{"rendered":"<p>H\u01b0\u1edbng d\u1eabn ch\u1ecdn inox ch\u1ecbu l\u1ef1c: c\u01a1 t\u00ednh, ch\u1ed1ng \u0103n m\u00f2n, h\u00e0n, ti\u00eau chu\u1ea9n v\u1eadt li\u1ec7u, v\u00ed d\u1ee5 t\u00ednh nhanh v\u00e0 khuy\u1ebfn ngh\u1ecb m\u00e1c th\u00e9p theo m\u00f4i tr\u01b0\u1eddng Vi\u1ec7t Nam.<\/p>\n","protected":false},"author":7,"featured_media":1063,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[23],"tags":[],"class_list":["post-1603","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\/1603","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=1603"}],"version-history":[{"count":0,"href":"https:\/\/inoxcuongthinh.com\/inct\/wp\/v2\/posts\/1603\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/inoxcuongthinh.com\/inct\/wp\/v2\/media\/1063"}],"wp:attachment":[{"href":"https:\/\/inoxcuongthinh.com\/inct\/wp\/v2\/media?parent=1603"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/inoxcuongthinh.com\/inct\/wp\/v2\/categories?post=1603"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/inoxcuongthinh.com\/inct\/wp\/v2\/tags?post=1603"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}