{"id":4836,"date":"2026-10-22T17:30:24","date_gmt":"2026-10-22T17:30:24","guid":{"rendered":"https:\/\/www.ggsteelstruct.com\/blog\/q355b-vs-astm-a572-s355jr-chart-new\/"},"modified":"2026-10-22T22:15:07","modified_gmt":"2026-10-22T22:15:07","slug":"q355b-vs-astm-a572-s355jr-chart","status":"publish","type":"post","link":"https:\/\/www.ggsteelstruct.com\/vi\/blog\/q355b-vs-astm-a572-s355jr-chart\/","title":{"rendered":"Bi\u1ec3u \u0111\u1ed3 so s\u00e1nh Q355B, A572 v\u00e0 S355JR"},"content":{"rendered":"

B\u1ea3n v\u1ebd t\u1eeb \u00dac y\u00eau c\u1ea7u AS\/NZS 3678 C\u1ea5p 350. M\u1ed9t t\u01b0 v\u1ea5n v\u00f9ng V\u1ecbnh ch\u1ec9 \u0111\u1ecbnh S355J2. M\u1ed9t k\u1ef9 s\u01b0 M\u1ef9 ghi A572 Gr.50. M\u1ed9t ch\u1ee9ng ch\u1ec9 nh\u00e0 m\u00e1y Trung Qu\u1ed1c ghi Q355B. Ch\u00fang c\u00f3 ph\u1ea3i c\u00f9ng lo\u1ea1i th\u00e9p kh\u00f4ng? G\u1ea7n gi\u1ed1ng, nh\u01b0ng kh\u00f4ng ph\u1ea3i l\u00fac n\u00e0o c\u0169ng thay th\u1ebf \u0111\u01b0\u1ee3c.<\/p>\n

H\u01b0\u1edbng d\u1eabn n\u00e0y \u0111\u1eb7t c\u00e1c c\u1ea5p th\u00e9p k\u1ebft c\u1ea5u ph\u1ed5 bi\u1ebfn t\u1eeb GB\/T 1591, EN 10025 v\u00e0 ASTM c\u1ea1nh nhau, v\u1edbi \u0111\u1ed9 b\u1ec1n ch\u1ea3y, \u0111\u1ed9 b\u1ec1n k\u00e9o, nhi\u1ec7t \u0111\u1ed9 th\u1eed va \u0111\u1eadp v\u00e0 t\u01b0\u01a1ng \u0111\u01b0\u01a1ng cacbon (CEV), v\u00e0 gi\u1ea3i th\u00edch khi n\u00e0o thay th\u1ebf an to\u00e0n v\u00e0 khi n\u00e0o c\u1ea7n s\u1ef1 ph\u00ea duy\u1ec7t c\u1ee7a k\u1ef9 s\u01b0.<\/p>\n

C\u00e1ch \u0111\u1ecdc c\u00e1c gi\u00e1 tr\u1ecb.<\/b> C\u00e1c s\u1ed1 li\u1ec7u l\u00e0 gi\u00e1 tr\u1ecb t\u1ed1i thi\u1ec3u t\u1eeb c\u00e1c ti\u00eau chu\u1ea9n hi\u1ec7n h\u00e0nh cho \u0111\u1ed9 d\u00e0y \u0111\u1ebfn 16 mm tr\u1eeb khi c\u00f3 ghi ch\u00fa. \u0110\u1ed9 b\u1ec1n ch\u1ea3y gi\u1ea3m theo \u0111\u1ed9 d\u00e0y trong m\u1ecdi ti\u00eau chu\u1ea9n. Lu\u00f4n ki\u1ec3m tra d\u1ea3i \u0111\u1ed9 d\u00e0y \u00e1p d\u1ee5ng cho t\u1ea5m c\u1ee7a b\u1ea1n.<\/div>\n
N\u1ed9i dung<\/b><\/p>\n
    \n
  1. B\u1ea3ng t\u01b0\u01a1ng \u0111\u01b0\u01a1ng<\/a><\/li>\n
  2. B\u1ea3n \u0111\u1ed3 thay th\u1ebf<\/a><\/li>\n
  3. N\u0103m ki\u1ec3m tra thay th\u1ebf<\/a><\/li>\n
  4. Ch\u1ee9ng ch\u1ec9 th\u1eed nghi\u1ec7m nh\u00e0 m\u00e1y 3.1<\/a><\/li>\n
  5. C\u00e1c c\u1ea5p ch\u00fang t\u00f4i cung c\u1ea5p<\/a><\/li>\n
  6. C\u00e2u h\u1ecfi th\u01b0\u1eddng g\u1eb7p<\/a><\/li>\n<\/ol>\n

    Vi\u1ebft b\u1edfi \u0110\u1ed9i K\u1ef9 Thu\u1eadt Th\u00e9p Guiguan. Xu\u1ea5t b\u1ea3n Th\u00e1ng 10 2026. C\u00e1c s\u1ed1 li\u1ec7u l\u00e0 gi\u00e1 tr\u1ecb \u0111i\u1ec3n h\u00ecnh v\u00e0 \u0111\u01b0\u1ee3c x\u00e1c nh\u1eadn theo t\u1eebng d\u1ef1 \u00e1n trong b\u00e1o gi\u00e1 c\u1ee7a ch\u00fang t\u00f4i.<\/small><\/p>\n<\/div>\n

    B\u1ea3ng c\u1ea5p th\u00e9p k\u1ebft c\u1ea5u: GB vs EN vs ASTM<\/h2>\n
    \n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
    C\u1ea5p (ti\u00eau chu\u1ea9n)<\/th>\n\u0110\u1ed9 b\u1ec1n ch\u1ea3y t\u1ed1i thi\u1ec3u ReH MPa (\u226416 mm)<\/th>\n\u0110\u1ed9 b\u1ec1n k\u00e9o Rm MPa<\/th>\nTh\u1eed va \u0111\u1eadp<\/th>\nCEV t\u1ed1i \u0111a (\u226430 mm)<\/th>\n<\/tr>\n<\/thead>\n
    Q235B (GB\/T 700)<\/th>\n235<\/td>\n370\u2013500<\/td>\n27 J t\u1ea1i +20 \u00b0C<\/td>\nkh\u00f4ng quy \u0111\u1ecbnh<\/td>\n<\/tr>\n
    S235JR (EN 10025-2)<\/th>\n235<\/td>\n360\u2013510<\/td>\n27 J t\u1ea1i +20 \u00b0C<\/td>\n0.35<\/td>\n<\/tr>\n
    ASTM A36<\/th>\n250<\/td>\n400\u2013550<\/td>\nkh\u00f4ng y\u00eau c\u1ea7u<\/td>\nkh\u00f4ng quy \u0111\u1ecbnh<\/td>\n<\/tr>\n
    Q355B (GB\/T 1591)<\/th>\n355<\/td>\n470\u2013630<\/td>\n34 J t\u1ea1i +20 \u00b0C<\/td>\n0.45<\/td>\n<\/tr>\n
    Q355C (GB\/T 1591)<\/th>\n355<\/td>\n470\u2013630<\/td>\n34 J t\u1ea1i 0 \u00b0C<\/td>\n0.45<\/td>\n<\/tr>\n
    Q355D (GB\/T 1591)<\/th>\n355<\/td>\n470\u2013630<\/td>\n34 J t\u1ea1i -20 \u00b0C<\/td>\n0.45<\/td>\n<\/tr>\n
    S355JR (EN 10025-2)<\/th>\n355<\/td>\n470\u2013630<\/td>\n27 J t\u1ea1i +20 \u00b0C<\/td>\n0.45<\/td>\n<\/tr>\n
    S355J0 (EN 10025-2)<\/th>\n355<\/td>\n470\u2013630<\/td>\n27 J t\u1ea1i 0 \u00b0C<\/td>\n0.45<\/td>\n<\/tr>\n
    S355J2 (EN 10025-2)<\/th>\n355<\/td>\n470\u2013630<\/td>\n27 J t\u1ea1i -20 \u00b0C<\/td>\n0.45<\/td>\n<\/tr>\n
    ASTM A572 Gr.50<\/th>\n345<\/td>\n\u2265450<\/td>\nb\u1ed5 sung (S5)<\/td>\nb\u1ed5 sung<\/td>\n<\/tr>\n
    ASTM A992 (h\u00ecnh d\u1ea1ng W)<\/th>\n345\u2013450<\/td>\n\u2265450, Y\/T \u22640.85<\/td>\nb\u1ed5 sung<\/td>\n0.45 (h\u00ecnh d\u1ea1ng)<\/td>\n<\/tr>\n
    Q390B\/C\/D (GB\/T 1591)<\/th>\n390<\/td>\n490\u2013650<\/td>\n34 J t\u1ea1i +20 \/ 0 \/ -20 \u00b0C<\/td>\n0.45<\/td>\n<\/tr>\n
    Q420GJC (GB\/T 19879)<\/th>\n420\u2013550 (16\u201350 mm)<\/td>\n520\u2013680<\/td>\n47 J t\u1ea1i 0 \u00b0C<\/td>\n0.48 (\u226450 mm)<\/td>\n<\/tr>\n
    S420M \/ ML (EN 10025-4)<\/th>\n420<\/td>\n520\u2013680<\/td>\n40 J t\u1ea1i -20 \u00b0C \/ 27 J t\u1ea1i -50 \u00b0C<\/td>\n0.43<\/td>\n<\/tr>\n
    ASTM A572 Gr.60<\/th>\n415<\/td>\n\u2265520<\/td>\nb\u1ed5 sung<\/td>\nb\u1ed5 sung<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

    Gi\u00e1 tr\u1ecb t\u1ed1i thi\u1ec3u theo c\u00e1c ti\u00eau chu\u1ea9n tham chi\u1ebfu. N\u0103ng l\u01b0\u1ee3ng va \u0111\u1eadp l\u00e0 trung b\u00ecnh c\u1ee7a ba m\u1eabu th\u1eed Charpy V-notch, theo chi\u1ec1u d\u1ecdc. Th\u00e9p GJ c\u0169ng gi\u1edbi h\u1ea1n t\u1ef7 l\u1ec7 \u0111\u1ed9 b\u1ec1n v\u00e0 cung c\u1ea5p c\u00e1c c\u1ea5p Z15\/Z25\/Z35 theo \u0111\u1ed9 d\u00e0y.<\/p>\n

    S\u1ef1 kh\u00e1c bi\u1ec7t th\u1ef1c t\u1ebf ch\u00ednh gi\u1eefa \u201cB\u201d, \u201cC\u201d v\u00e0 \u201cD\u201d (ho\u1eb7c \u201cJR\u201d, \u201cJ0\u201d v\u00e0 \u201cJ2\u201d) l\u00e0 nhi\u1ec7t \u0111\u1ed9 th\u1eed Charpy, kh\u00f4ng ph\u1ea3i \u0111\u1ed9 b\u1ec1n. \u0110\u1ed9 b\u1ec1n l\u00e0 nh\u01b0 nhau trong m\u1ed7i nh\u00f3m.<\/p>\n

    Q355B so v\u1edbi S355JR so v\u1edbi A572 Gr.50: c\u00e1c t\u01b0\u01a1ng \u0111\u01b0\u01a1ng g\u1ea7n nh\u1ea5t<\/h2>\n

    C\u00e1c c\u1ea5p hi\u1ebfm khi l\u00e0 t\u01b0\u01a1ng \u0111\u01b0\u01a1ng ch\u00ednh x\u00e1c v\u00ec c\u00e1c ti\u00eau chu\u1ea9n ki\u1ec3m tra c\u00e1c y\u1ebfu t\u1ed1 kh\u00e1c nhau. \u0110\u00e2y l\u00e0 b\u1ea3n \u0111\u1ed3 thay th\u1ebf ch\u00fang t\u00f4i s\u1eed d\u1ee5ng khi k\u1ef9 s\u01b0 ph\u00ea duy\u1ec7t c\u00e1c l\u1ef1a ch\u1ecdn thay th\u1ebf.<\/p>\n

    \n\n\n\n\n\n\n\n\n\n\n
    C\u1ea5p GB<\/th>\nC\u1ea5p EN g\u1ea7n nh\u1ea5t<\/th>\nC\u1ea5p ASTM g\u1ea7n nh\u1ea5t<\/th>\nC\u1ea5p AS\/NZS g\u1ea7n nh\u1ea5t<\/th>\nGhi ch\u00fa<\/th>\n<\/tr>\n<\/thead>\n
    Q235B<\/th>\nS235JR<\/td>\nA36<\/td>\nAS\/NZS 3678 Gr.250<\/td>\nA36 c\u00f3 gi\u1edbi h\u1ea1n ch\u1ea3y h\u01a1i cao h\u01a1n m\u1ed9t ch\u00fat (250 so v\u1edbi 235)<\/td>\n<\/tr>\n
    Q355B<\/th>\nS355JR<\/td>\nA572 Gr.50<\/td>\nAS\/NZS 3678 Gr.350<\/td>\nLo\u1ea1i k\u1ebft c\u1ea5u ph\u1ed5 bi\u1ebfn nh\u1ea5t<\/td>\n<\/tr>\n
    Q355C<\/th>\nS355J0<\/td>\nA572 Gr.50 + S5 \u1edf 0 \u00b0C<\/td>\nGr.350L0<\/td>\nD\u00f9ng cho c\u00e1c th\u00e0nh ph\u1ea7n ngo\u00e0i tr\u1eddi ho\u1eb7c ch\u1ecbu t\u1ea3i m\u1ecfi<\/td>\n<\/tr>\n
    Q355D<\/th>\nS355J2<\/td>\nA572 Gr.50 + S5 \u1edf -20 \u00b0C<\/td>\nGr.350L15 (-15 \u00b0C)<\/td>\nKh\u00ed h\u1eadu l\u1ea1nh, t\u1ea5m d\u00e0y<\/td>\n<\/tr>\n
    Q390C<\/th>\ngi\u1eefa S355 v\u00e0 S420<\/td>\nA572 Gr.55<\/td>\n\u2013<\/td>\nCh\u1ec9 s\u1eed d\u1ee5ng khi c\u00f3 s\u1ef1 ch\u1ea5p thu\u1eadn c\u1ee7a k\u1ef9 s\u01b0<\/td>\n<\/tr>\n
    Q420GJC<\/th>\nS420M \/ S420N<\/td>\nA572 Gr.60<\/td>\nGr.400<\/td>\nT\u1ea5m d\u00e0y cho c\u1ed9t cao t\u1ea7ng<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

    A572 Gr.50 c\u00f3 gi\u1edbi h\u1ea1n ch\u1ea3y t\u1ed1i thi\u1ec3u l\u00e0 345 MPa, th\u1ea5p h\u01a1n 10 MPa so v\u1edbi Q355B. Do \u0111\u00f3, Q355B \u0111\u00e1p \u1ee9ng y\u00eau c\u1ea7u v\u1ec1 \u0111\u1ed9 b\u1ec1n Gr.50. Vi\u1ec7c thay th\u1ebf ng\u01b0\u1ee3c l\u1ea1i kh\u00f4ng t\u1ef1 \u0111\u1ed9ng.<\/p>\n

    N\u0103m ki\u1ec3m tra tr\u01b0\u1edbc khi thay th\u1ebf m\u1ed9t c\u1ea5p \u0111\u1ed9<\/h2>\n

    \u0110\u1ed9 b\u1ec1n v\u00e0 h\u00f3a h\u1ecdc kh\u00f4ng ph\u1ea3i l\u00e0 nh\u1eefng ki\u1ec3m tra duy nh\u1ea5t. Tr\u01b0\u1edbc khi thay th\u1ebf m\u1ed9t c\u1ea5p \u0111\u1ed9 c\u1ee5 th\u1ec3, h\u00e3y x\u00e1c nh\u1eadn n\u0103m \u0111i\u1ec3m n\u00e0y v\u1edbi k\u1ef9 s\u01b0 ch\u1ecbu tr\u00e1ch nhi\u1ec7m.<\/p>\n

    1. \u0110\u1ed9 dai va \u0111\u1eadp \u1edf nhi\u1ec7t \u0111\u1ed9 ph\u00f9 h\u1ee3p<\/h3>\n

    Q355B \u0111\u01b0\u1ee3c th\u1eed nghi\u1ec7m \u1edf +20 \u00b0C. N\u1ebfu thi\u1ebft k\u1ebf y\u00eau c\u1ea7u S355J2 (-20 \u00b0C), h\u00e3y thay th\u1ebf b\u1eb1ng Q355D, kh\u00f4ng ph\u1ea3i Q355B. \u0110i\u1ec1u n\u00e0y quan tr\u1ecdng \u0111\u1ed1i v\u1edbi th\u00e9p ngo\u00e0i tr\u1eddi \u1edf c\u00e1c v\u00f9ng l\u1ea1nh, d\u1ea7m c\u1ea9u v\u00e0 c\u00e1c th\u00e0nh ph\u1ea7n ch\u1ecbu t\u1ea3i \u0111\u1ed9ng.<\/p>\n

    2. D\u1ea3i \u0111\u1ed9 d\u00e0y<\/h3>\n

    \u0110\u1ed1i v\u1edbi Q355 v\u00e0 S355, gi\u1edbi h\u1ea1n ch\u1ea3y t\u1ed1i thi\u1ec3u gi\u1ea3m xu\u1ed1ng c\u00f2n 345 MPa tr\u00ean 16 mm, 335 MPa tr\u00ean 40 mm v\u00e0 325 MPa tr\u00ean 63 mm. C\u00e1c thi\u1ebft k\u1ebf s\u1eed d\u1ee5ng t\u1ea5m d\u00e0y ph\u1ea3i d\u00f9ng gi\u00e1 tr\u1ecb gi\u1ea3m cho \u0111\u1ed9 d\u00e0y th\u1ef1c t\u1ebf.<\/p>\n

    3. T\u01b0\u01a1ng \u0111\u01b0\u01a1ng cacbon v\u00e0 kh\u1ea3 n\u0103ng h\u00e0n<\/h3>\n

    CEV = C + Mn\/6 + (Cr+Mo+V)\/5 + (Ni+Cu)\/15. D\u01b0\u1edbi kho\u1ea3ng 0,42 h\u1ea7u h\u1ebft c\u00e1c m\u1ed1i h\u00e0n t\u1ea5m kh\u00f4ng c\u1ea7n gia nhi\u1ec7t tr\u01b0\u1edbc \u1edf \u0111\u1ed9 d\u00e0y b\u00ecnh th\u01b0\u1eddng. Tr\u00ean 0,45, ho\u1eb7c \u0111\u1ed1i v\u1edbi t\u1ea5m tr\u00ean 40 mm, WPS c\u1ee7a ch\u00fang t\u00f4i quy \u0111\u1ecbnh ph\u1ea3i gia nhi\u1ec7t tr\u01b0\u1edbc. \u0110\u1ed1i v\u1edbi m\u1ed1i h\u00e0n CJP t\u1ea5m d\u00e0y, \u0111i\u1ec1u n\u00e0y \u0111\u01b0\u1ee3c ki\u1ec3m tra theo t\u1eebng l\u00f4 nhi\u1ec7t luy\u1ec7n.<\/p>\n

    4. T\u00ednh ch\u1ea5t xuy\u00ean su\u1ed1t \u0111\u1ed9 d\u00e0y (Z)<\/h3>\n

    C\u00e1c t\u1ea5m d\u00e0y ch\u1ecbu t\u1ea3i xuy\u00ean su\u1ed1t \u0111\u1ed9 d\u00e0y, nh\u01b0 m\u1eb7t b\u00edch c\u1ed9t t\u1ea1i m\u1ed1i h\u00e0n CJP d\u1ea7m-c\u1ed9t, c\u1ea7n c\u00e1c t\u00ednh ch\u1ea5t Z15, Z25 ho\u1eb7c Z35 \u0111\u1ec3 ch\u1ed1ng r\u00e1ch l\u1edbp. Q420GJC v\u00e0 S355J2+Z35 l\u00e0 \u0111i\u1ec3n h\u00ecnh cho c\u1ed9t h\u1ed9p<\/a> v\u00e0 n\u00fat \u0111a khoang<\/a>.<\/p>\n

    5. Kh\u1ea3 n\u0103ng cung c\u1ea5p ti\u1ebft di\u1ec7n<\/h3>\n

    Ti\u1ebft di\u1ec7n d\u1ea1ng ch\u1eef W theo ASTM kh\u00f4ng \u0111\u01b0\u1ee3c c\u00e1n t\u1ea1i Trung Qu\u1ed1c. Khi thi\u1ebft k\u1ebf M\u1ef9 y\u00eau c\u1ea7u ti\u1ebft di\u1ec7n A992 W-shapes, ch\u00fang t\u00f4i ho\u1eb7c cung c\u1ea5p ti\u1ebft di\u1ec7n H g\u1ea7n nh\u1ea5t theo GB trong Q355B ho\u1eb7c ch\u1ebf t\u1ea1o ti\u1ebft di\u1ec7n h\u00e0n c\u00f3 c\u00f9ng k\u00edch th\u01b0\u1edbc. C\u1ea3 hai \u0111\u1ec1u c\u1ea7n s\u1ef1 ph\u00ea duy\u1ec7t c\u1ee7a k\u1ef9 s\u01b0. Xem D\u1ea7m H v\u00e0 d\u1ea7m b\u1ea3n<\/a> v\u00e0 H\u01b0\u1edbng d\u1eabn so s\u00e1nh d\u1ea7m H v\u00e0 d\u1ea7m I c\u1ee7a ch\u00fang t\u00f4i<\/a>.<\/p>\n

    \u0110\u1ecdc ch\u1ee9ng ch\u1ec9 ki\u1ec3m tra l\u00f2 luy\u1ec7n (EN 10204 3.1)<\/h2>\n

    M\u1ed7i l\u00f4 th\u00e9p ch\u00fang t\u00f4i s\u1eed d\u1ee5ng \u0111\u1ec1u c\u00f3 th\u1ec3 truy xu\u1ea5t \u0111\u1ebfn ch\u1ee9ng ch\u1ec9 ki\u1ec3m tra l\u00f2 luy\u1ec7n theo EN 10204 lo\u1ea1i 3.1. \u201c3.1\u201d ngh\u0129a l\u00e0 ch\u1ee9ng ch\u1ec9 do b\u1ed9 ph\u1eadn ki\u1ec3m tra ri\u00eang c\u1ee7a nh\u00e0 m\u00e1y ph\u00e1t h\u00e0nh, \u0111\u1ed9c l\u1eadp v\u1edbi s\u1ea3n xu\u1ea5t, v\u00e0 d\u1ef1a tr\u00ean c\u00e1c th\u1eed nghi\u1ec7m s\u1ea3n ph\u1ea9m th\u1ef1c t\u1ebf \u0111\u01b0\u1ee3c cung c\u1ea5p.<\/p>\n

    \n\n\n\n\n\n\n\n\n\n\n\n\n
    Tr\u01b0\u1eddng MTC<\/th>\nNh\u1eefng g\u00ec c\u1ea7n ki\u1ec3m tra<\/th>\n<\/tr>\n<\/thead>\n
    Ti\u00eau chu\u1ea9n v\u00e0 c\u1ea5p \u0111\u1ed9<\/th>\nPh\u00f9 h\u1ee3p v\u1edbi b\u1ea3n v\u1ebd, v\u00ed d\u1ee5 GB\/T 1591 Q355D ho\u1eb7c EN 10025-2 S355J2<\/td>\n<\/tr>\n
    S\u1ed1 l\u00f4 nhi\u1ec7t luy\u1ec7n<\/th>\nPh\u00f9 h\u1ee3p v\u1edbi d\u1ea5u tr\u00ean t\u1ea5m v\u00e0 h\u1ed3 s\u01a1 truy xu\u1ea5t c\u1ee7a ch\u00fang t\u00f4i<\/td>\n<\/tr>\n
    \u0110\u1ed9 d\u00e0y v\u00e0 k\u00edch th\u01b0\u1edbc<\/th>\nBao ph\u1ee7 \u0111\u1ed9 d\u00e0y t\u1ea5m s\u1eed d\u1ee5ng trong th\u00e0nh ph\u1ea7n<\/td>\n<\/tr>\n
    Th\u00e0nh ph\u1ea7n h\u00f3a h\u1ecdc<\/th>\nC, Si, Mn, P, S, c\u1ed9ng v\u1edbi vi h\u1ee3p kim; CEV \u0111\u01b0\u1ee3c t\u00ednh v\u00e0 n\u1eb1m trong gi\u1edbi h\u1ea1n<\/td>\n<\/tr>\n
    Th\u1eed k\u00e9o<\/th>\nReH, Rm v\u00e0 \u0111\u1ed9 gi\u00e3n d\u00e0i \u0111\u1ea1t ho\u1eb7c v\u01b0\u1ee3t m\u1ee9c t\u1ed1i thi\u1ec3u<\/td>\n<\/tr>\n
    Charpy V-notch<\/th>\nNhi\u1ec7t \u0111\u1ed9 th\u1eed nghi\u1ec7m v\u00e0 n\u0103ng l\u01b0\u1ee3ng trung b\u00ecnh \u0111\u00e1p \u1ee9ng c\u1ea5p ph\u1ee5<\/td>\n<\/tr>\n
    Ki\u1ec3m tra Z (n\u1ebfu \u0111\u01b0\u1ee3c \u0111\u1eb7t h\u00e0ng)<\/th>\nGi\u1ea3m di\u1ec7n t\u00edch \u226515 \/ 25 \/ 35%<\/td>\n<\/tr>\n
    Ch\u1eef k\u00fd v\u00e0 con d\u1ea5u<\/th>\nPh\u00f2ng ki\u1ec3m tra nh\u00e0 m\u00e1y, kh\u00f4ng ph\u1ea3i v\u0103n ph\u00f2ng b\u00e1n h\u00e0ng<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

    Khi \u0111\u1eb7c \u0111i\u1ec3m k\u1ef9 thu\u1eadt y\u00eau c\u1ea7u 3.2 ch\u1ee9ng ch\u1ec9, th\u1eed nghi\u1ec7m \u0111\u01b0\u1ee3c ch\u1ee9ng ki\u1ebfn b\u1edfi b\u00ean th\u1ee9 ba (v\u00ed d\u1ee5 SGS, BV ho\u1eb7c TUV) v\u00e0 \u0111\u1ed3ng k\u00fd. Ch\u00fang t\u00f4i s\u1eafp x\u1ebfp vi\u1ec7c n\u00e0y v\u1edbi chi ph\u00ed. M\u1ed9t b\u1ed9 ch\u1ee9ng ch\u1ec9 3.1 \u0111\u01b0\u1ee3c g\u1eedi k\u00e8m v\u1edbi m\u1ed7i \u0111\u01a1n h\u00e0ng, tham chi\u1ebfu ch\u00e9o \u0111\u1ebfn c\u00e1c d\u1ea5u m\u1ea3nh trong BOM cu\u1ed1i c\u00f9ng. Th\u00eam v\u1ec1 ch\u1ea5t l\u01b0\u1ee3ng, NDT v\u00e0 quy tr\u00ecnh v\u1eadn chuy\u1ec3n c\u1ee7a ch\u00fang t\u00f4i<\/a> v\u00e0 ch\u1ee9ng nh\u1eadn c\u1ee7a ch\u00fang t\u00f4i<\/a>.<\/p>\n

    C\u00e1c c\u1ea5p ch\u00fang t\u00f4i s\u1eed d\u1ee5ng v\u00e0 cho m\u1ee5c \u0111\u00edch g\u00ec<\/h2>\n

    Ph\u1ea7n l\u1edbn th\u00e9p k\u1ebft c\u1ea5u c\u1ee7a ch\u00fang t\u00f4i l\u00e0 Q355B, c\u1ea5p m\u1eb7c \u0111\u1ecbnh cho khung, d\u1ea7m v\u00e0 d\u00e0n. \u0110\u00e2y l\u00e0 c\u00e1c c\u1ea5p m\u00e0 ch\u00fang t\u00f4i th\u01b0\u1eddng l\u01b0u kho v\u00e0 gia c\u00f4ng.<\/p>\n

    \n\n\n\n\n\n\n\n\n\n
    S\u1eed d\u1ee5ng<\/th>\nC\u1ea5p \u0111i\u1ec3n h\u00ecnh ch\u00fang t\u00f4i cung c\u1ea5p<\/th>\nT\u01b0\u01a1ng \u0111\u01b0\u01a1ng tr\u00ean b\u1ea3n v\u1ebd xu\u1ea5t kh\u1ea9u<\/th>\n<\/tr>\n<\/thead>\n
    Thanh m\u00e1i, thanh ngang, th\u00e9p ph\u1ee5<\/th>\nQ235B ho\u1eb7c Q355B; G550 cho th\u00e9p \u0111\u1ecbnh h\u00ecnh ngu\u1ed9i<\/td>\nS235JR \/ A36<\/td>\n<\/tr>\n
    Khung PEB, d\u1ea7m, d\u00e0n<\/th>\nQ355B<\/td>\nS355JR \/ A572 Gr.50<\/td>\n<\/tr>\n
    Ngo\u00e0i tr\u1eddi, d\u1ea7m c\u1ea7u tr\u1ee5c, m\u1ecfi<\/th>\nQ355C ho\u1eb7c Q355D<\/td>\nS355J0 \/ S355J2<\/td>\n<\/tr>\n
    C\u1ed9t h\u1ed9p cao t\u1ea7ng, t\u1ea5m d\u00e0y<\/th>\nQ355D-Z25 ho\u1eb7c Q420GJC<\/td>\nS355J2+Z25 \/ S420M<\/td>\n<\/tr>\n
    C\u1ed9t v\u00e0 n\u00fat mega<\/th>\nQ420GJC, Q390GJC<\/td>\nS420M \/ A572 Gr.60<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

    T\u00f2a th\u00e1p Zengcheng New World cao 241 m \u0111\u00e3 s\u1eed d\u1ee5ng kho\u1ea3ng 7.000 t\u1ea5m th\u00e9p Q420GJC cho c\u00e1c c\u1ed9t c\u1ee7a n\u00f3, v\u00e0 Tr\u1ee5 s\u1edf CGN<\/a> \u0111\u00e3 s\u1eed d\u1ee5ng c\u1ed9t mega \u0111a khoang b\u1eb1ng t\u1ea5m d\u00e0y. \u0110\u1ed1i v\u1edbi c\u00f4ng vi\u1ec7c nh\u1eb9 h\u01a1n, xem nh\u00e0 kho th\u00e9p<\/a> v\u00e0 gia c\u00f4ng th\u00e9p k\u1ebft c\u1ea5u<\/a>.<\/p>\n

    Ch\u1ec9 \u0111\u1ecbnh cho gia c\u00f4ng t\u1ea1i Trung Qu\u1ed1c:<\/b> vi\u1ebft c\u1ea5p \u0111\u1ed9 l\u00e0 \u201cS355J2 ho\u1eb7c t\u01b0\u01a1ng \u0111\u01b0\u01a1ng Q355D theo GB\/T 1591, MTC EN 10204 3.1\u201d. \u0110i\u1ec1u n\u00e0y cho ph\u00e9p nh\u00e0 ch\u1ebf t\u1ea1o mua t\u1ea5m n\u1ed9i \u0111\u1ecba trong khi v\u1eabn gi\u1eef y\u00eau c\u1ea7u v\u1ec1 \u0111\u1ed9 dai c\u1ee7a b\u1ea1n. C\u1ea5p \u0111\u1ed9 kh\u00f4ng thay \u0111\u1ed5i nhi\u1ec1u v\u1ec1 gi\u00e1: Q355 th\u01b0\u1eddng ch\u1ec9 cao h\u01a1n Q235 kho\u1ea3ng 3\u20135% m\u1ed7i t\u1ea5n. Xem th\u00eam c\u1ee7a ch\u00fang t\u00f4i H\u01b0\u1edbng d\u1eabn chi ph\u00ed theo t\u1ea5n n\u0103m 2026<\/a>.<\/div>\n

    C\u00e1c c\u00e2u h\u1ecfi k\u1ef9 s\u01b0 th\u01b0\u1eddng h\u1ecfi v\u1ec1 ch\u1ee7 \u0111\u1ec1 n\u00e0y<\/h2>\n

    C\u1ea7n c\u00e2u tr\u1ea3 l\u1eddi c\u1ee5 th\u1ec3 cho d\u1ef1 \u00e1n? K\u1ef9 s\u01b0 c\u1ee7a ch\u00fang t\u00f4i tr\u1ea3 l\u1eddi trong v\u00f2ng 24 gi\u1edd.<\/p>\n

    H\u1ecfi k\u1ef9 s\u01b0<\/a><\/p>\n

    \n
    \nQ355B c\u00f3 gi\u1ed1ng v\u1edbi S355JR kh\u00f4ng?<\/summary>\n
    \n

    Ch\u00fang c\u00f3 gi\u1edbi h\u1ea1n ch\u1ea3y t\u1ed1i thi\u1ec3u gi\u1ed1ng nhau (355 MPa) v\u00e0 ph\u1ea1m vi k\u00e9o (470\u2013630 MPa) v\u00e0 \u0111\u01b0\u1ee3c ch\u1ea5p nh\u1eadn l\u00e0 t\u01b0\u01a1ng \u0111\u01b0\u01a1ng trong h\u1ea7u h\u1ebft c\u00e1c d\u1ef1 \u00e1n. Q355B \u0111\u01b0\u1ee3c ki\u1ec3m tra va \u0111\u1eadp \u1edf 34 J t\u1ea1i +20 \u00b0C so v\u1edbi 27 J c\u1ee7a S355JR, do \u0111\u00f3 n\u00f3 \u0111\u00e1p \u1ee9ng y\u00eau c\u1ea7u JR. Vi\u1ec7c thay th\u1ebf cu\u1ed1i c\u00f9ng l\u00e0 quy\u1ebft \u0111\u1ecbnh c\u1ee7a k\u1ef9 s\u01b0.<\/p>\n<\/div>\n<\/details>\n

    \nQ355B c\u00f3 th\u1ec3 thay th\u1ebf ASTM A572 Gr.50 kh\u00f4ng?<\/summary>\n
    \n

    V\u1ec1 \u0111\u1ed9 b\u1ec1n, c\u00f3: Q355B c\u00f3 gi\u1edbi h\u1ea1n ch\u1ea3y t\u1ed1i thi\u1ec3u 355 MPa so v\u1edbi 345 MPa. Ki\u1ec3m tra b\u1ea5t k\u1ef3 y\u00eau c\u1ea7u b\u1ed5 sung n\u00e0o trong \u0111\u1eb7c \u0111i\u1ec3m k\u1ef9 thu\u1eadt, ch\u1eb3ng h\u1ea1n nh\u01b0 \u0111\u1ed9 dai CVN ho\u1eb7c gi\u1edbi h\u1ea1n CE, v\u00e0 nh\u1eadn s\u1ef1 ph\u00ea duy\u1ec7t c\u1ee7a k\u1ef9 s\u01b0 ch\u1ecbu tr\u00e1ch nhi\u1ec7m.<\/p>\n<\/div>\n<\/details>\n

    \nC\u00e1i g\u00ec \u0111\u00e3 thay th\u1ebf Q345B?<\/summary>\n
    \n

    GB\/T 1591-2018 \u0111\u00e3 thay th\u1ebf Q345 b\u1eb1ng Q355. C\u1ea5p m\u1edbi c\u00f3 gi\u1edbi h\u1ea1n ch\u1ea3y cao h\u01a1n 10 MPa v\u00e0 l\u00e0 c\u1ea5p tr\u00ean c\u00e1c ch\u1ee9ng ch\u1ec9 nh\u00e0 m\u00e1y Trung Qu\u1ed1c hi\u1ec7n t\u1ea1i.<\/p>\n<\/div>\n<\/details>\n

    \nS355NH c\u00f3 ngh\u0129a l\u00e0 g\u00ec?<\/summary>\n
    \n

    S355NH l\u00e0 ti\u1ebft di\u1ec7n r\u1ed7ng ho\u00e0n thi\u1ec7n n\u00f3ng theo EN 10210, \u0111\u00e3 \u0111\u01b0\u1ee3c chu\u1ea9n h\u00f3a, v\u1edbi 40 J \u1edf -20 \u00b0C. \u0110\u1ed1i v\u1edbi c\u00e1c th\u00e0nh ph\u1ea7n h\u1ed9p ch\u1ebf t\u1ea1o, ch\u00fang t\u00f4i th\u01b0\u1eddng s\u1eed d\u1ee5ng t\u1ea5m S355J2 ho\u1eb7c Q355D v\u1edbi \u0111\u1ed9 dai t\u01b0\u01a1ng \u1ee9ng.<\/p>\n<\/div>\n<\/details>\n<\/div>","protected":false},"excerpt":{"rendered":"

    Q355B vs S355JR vs ASTM A572 Gr.50 v\u00e0 12 lo\u1ea1i th\u00e9p k\u1ebft c\u1ea5u kh\u00e1c c\u1ea1nh nhau: \u0111\u1ed9 b\u1ec1n ch\u1ea3y, \u0111\u1ed9 b\u1ec1n k\u00e9o, nhi\u1ec7t \u0111\u1ed9 va \u0111\u1eadp Charpy v\u00e0 CEV, c\u00f9ng quy t\u1eafc thay th\u1ebf v\u00e0 c\u00e1ch \u0111\u1ecdc ch\u1ee9ng ch\u1ec9 nh\u00e0 m\u00e1y EN 10204 3.1.<\/p>","protected":false},"author":1,"featured_media":4469,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":"","_aseo_title":"Q355B vs ASTM A572 vs S355JR & S355NH Steel Grade Chart","_aseo_desc":"Equivalence chart for GB Q235B\/Q355B\/Q420GJC, EN S355JR\/J2\/NH and ASTM A36\/A572 Gr.50: yield, tensile, impact toughness, CE and substitution rules.","_aseo_noindex":false,"_aseo_og_image":0,"_aseo_schema_type":""},"categories":[12],"tags":[19],"class_list":["post-4836","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-materials","tag-gb-en-astm"],"_links":{"self":[{"href":"https:\/\/www.ggsteelstruct.com\/vi\/wp-json\/wp\/v2\/posts\/4836","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.ggsteelstruct.com\/vi\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.ggsteelstruct.com\/vi\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.ggsteelstruct.com\/vi\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.ggsteelstruct.com\/vi\/wp-json\/wp\/v2\/comments?post=4836"}],"version-history":[{"count":1,"href":"https:\/\/www.ggsteelstruct.com\/vi\/wp-json\/wp\/v2\/posts\/4836\/revisions"}],"predecessor-version":[{"id":4841,"href":"https:\/\/www.ggsteelstruct.com\/vi\/wp-json\/wp\/v2\/posts\/4836\/revisions\/4841"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.ggsteelstruct.com\/vi\/wp-json\/wp\/v2\/media\/4469"}],"wp:attachment":[{"href":"https:\/\/www.ggsteelstruct.com\/vi\/wp-json\/wp\/v2\/media?parent=4836"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.ggsteelstruct.com\/vi\/wp-json\/wp\/v2\/categories?post=4836"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.ggsteelstruct.com\/vi\/wp-json\/wp\/v2\/tags?post=4836"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}