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    Structural Steel Plate

    Structural steel plate is mainly used in machinery manufacturing, steel structure construction, wind tower tube manufacturing, and bridge auxiliary material. With the continuing escalation of industry products, application field of structural steel plate is getting wider and wider. NISCO has a long history for plate production, its reputation for the structural steel plate production and performance has been well-established for a long time, and it has made immortal contributions to our country and even the world economic construction.

    1. Detailed information
    a. Size, Grade and Delivery State


    Steel Category
    Standard
    Grade
    Size (mm)
    Delivery State
    Carbon Structural Steel
    GB/T3274, GB/T700, GB/T1591, EN 10025, ASTM, JIS G3106
    Q235A~D, Q275A~D, S235J2, S235JO, S235JR, S275JR, A36, SS400,  A283, A285
    6-100*1600-3200
    AR, CR, TMCP, N
    Low Alloy Structural Steel
    Q345A~E, Q390D, Q420B, Q460C~E, S355JR, S355K2, S355NL, S355M, S355ML, S420M, S460M, SM490 A709Gr50
    6-80*1600-3200
    AR, CR, TMCP, N, QT
    High-building Structural Steel
    GB/T19879
    Q345GJB/C/D(Z35), Q390GJB/C/D(Z35)
    6-80*1600-3200
    AR, CR, TMCP, N
    High-quality Carbon Structural Steel
    GB/T711, GB/T3077, JIS G4051
    35#, 45#, 50#, 40Cr, S45C
    6-200*1600-2500
    AR


    b.Grade Comparison Table


    Steel Category
    GB
    Japanese Standard
    American Standard
    European Standard
    Carbon Structural Steel
    Q235A/B/C/D

    A283, A285
    S235J2, S235JO, S235JR
    Q275A/B/C/D
    SS400
    A36
    S275J2, S275JO , S275JR
    Low Alloy Structural Steel
    Q345A/B/C/D/E
    SM490
    A709-345T2, A709Gr50
    S355JR, S355K2, S355NL, S355ML
    Q460C/D/E
    SM570

    S460ML, S460QL
    High-quality Carbon Structural Steel
    35#, 45#, 50#, 40Cr
    S45C, S50C



    c. Chemical Composition wt%
    (1) Carbon Structural Steel


    Grade
    Quality Level
    Thickness/mm
    Chemical Composition,% No more than
    C
    Mn
    Si
    P
    S
    Q235
    A
    -
    0.22
    1.40
    0.35
    0.045
    0.050
    B
    0.20
    0.045
    0.045
    C
    0.17
    0.040
    0.040
    D
    0.035
    0.035
    Q275
    A
    -
    0.24
    1.50
    0.35
    0.045
    0.050
    B
    ≤40
    0.21
    0.045
    0.045
    >40
    0.22
    C
    -
    0.20
    0.040
    0.040
    D
    0.20
    0.035
    0.035


    (2) Low Alloy Structural Steel


    Grade
    Quality Level
    C
    Mn
    Si
    P
    S
    V
    Nb
    Ti
    No more than
    Q345
    A
    ≤0.20
    ≤1.70
    ≤0.50
    0.035
    0.035
    0.15
    0.07
    0.20
    B
    0.035
    0.035
    C
    0.030
    0.030
    D
    ≤0.18
    0.030
    0.030
    E
    0.025
    0.025
    Q390
    A
    ≤0.20
    ≤1.70
    ≤0.50
    0.035
    0.035
    0.20
    0.07
    0.20
    B
    0.035
    0.035
    C
    0.030
    0.030
    D
    0.030
    0.025
    E
    0.025
    0.020
    Q420
    A
    ≤0.20
    ≤1.70
    ≤0.50
    0.035
    0.035
    0.20
    0.07
    0.20
    B
    0.035
    0.035
    C
    0.030
    0.030
    D
    0.030
    0.025
    E
    0.025
    0.020
    Q460
    C
    ≤0.20
    ≤1.80
    ≤0.60
    0.030
    0.030
    0.20
    0.11
    0.20
    D
    0.030
    0.025
    E
    0.025
    0.020


    (3) High-building Structural Steel


    Grade
    Quality Level
    C
    Mn
    Si
    P
    S
    V
    Nb
    Ti
    No more than
    Q345GJ
    B
    ≤0.20
    ≤1.60
    ≤0.55
    0.025
    0.015
    0.15
    0.06
    0.30
    C
    D
    ≤0.18
    0.020
    0.015
    E
    Q390GJ
    C
    ≤0.20
    ≤1.60
    ≤0.55
    0.025
    0.015
    0.15
    0.06
    0.30
    D
    E
    ≤0.18
    0.020
    0.015


    (4) High-quality Carbon Structural Steel


    Grade
    C
    Mn
    Si
    P
    S
    Cr
    Ni
    Cu
    No more than
    35
    0.32-0.39
    0.50-0.80
    0.17-0.37
    0.035
    0.035
    0.20
    0.30
    0.25
    45
    0.42-0.50
    0.50-0.80
    0.17-0.37
    0.035
    0.035
    0.20
    0.30
    0.25
    50
    0.47-0.55
    0.50-0.80
    0.17-0.37
    0.035
    0.035
    0.20
    0.30
    0.25
    40Cr
    0.37-0.44
    0.50-0.80
    0.17-0.37
    0.035
    0.035
    0.80-1.10
    0.30
    0.25


    d. Performance Indicators
    (1) Carbon Structural Steel


    Grade
    Quality Level
    Lower Yield Strength ReL,MPa
    Tensile Strength Rm,
    MPa
    Elongation Ratio A,
    %
    Impact Energy, KV2(longitudinal)/J
    Thickness mm
    ≤16
    >16~40
    >40~60
    >60~100
    >100~150
    ≤40
    >40~60
    >60~100
    Temperature
    Min
    No less than
    No less than
    Q235
    A
    235
    225
    215
    195
    185
    370~500
    26
    25
    24
    -
    -
    B
    20
    27
    C
    0
    D
    -20
    Q275
    A
    375
    265
    255
    245
    225
    410~540
    22
    21
    20
    -
    -
    B
    20
    27
    C
    0
    D
    -20


    (2) Low Alloy Structural Steel


    Grade
    Quality Level
    Lower Yield Strength ReL,MPa
    Tensile Strength Rm,MPa
    Elongation Ratio A,
    %
    Impact Energy, KV2(longitudinal)/J
    Thickness mm
    ≤16
    >16~40
    >40~63
    >63~80
    >80~100
    ≤40
    >40~63
    >63~100
    Temperature
    Min
    No less than
    No less than
    Q345
    A
    345
    335
    325
    315
    305
    470~630
    20
    19
    19
    -
    -
    B
    20
    34
    C
    21
    20
    20
    0
    D
    -20
    E
    -40
    Q390
    A
    390
    370
    350
    330
    310
    490~650
    20
    19
    19
    -
    -
    B
    20
    34
    C
    0
    D
    -20
    E
    -40
    Q420
    A
    420
    400
    380
    360
    340
    520~680
    19
    18
    18
    -
    -
    B
    20
    34
    C
    0
    D
    -20
    E
    -40
    Q460
    C
    460
    440
    420
    400
    380
    550~720
    17
    16
    16
    0
    34
    D
    -20
    E
    -40


    (3) High-building Structural Steel


    Grade
    Quality Level
    Lower Yield Strength ReL,MPa
    Tensile Strength Rm,
    MPa
    Elongation Ratio A,
    %
    Impact Energy, KV2(longitudinal)/J
    Yield Ratio,
    No more than
    Thickness: mm
    ≤16
    >16~35
    >35~50
    >50~100
    No less than
    Temperature
    Min
    No less than
    Q345GJ
    B
    345
    345-465
    335-455
    325-445
    490~610
    22
    20
    34
    0.83
    C
    0
    D
    -20
    E
    -40
    Q390GJ
    C
    390
    390-510
    380-500
    370-490
    490~650
    20
    0
    34
    0.85
    D
    -20
    D
    -40
    E




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