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    Structural steel for Bridge

    Structural steel plates for bridge are the plates specially for manufacturing constructional opponents of bridges, the steel grades of which are carbon steel and low alloy steel. Bridges are the key part in the infrastructure construction of road transportation and with the rapid growth of the economy, the requirements on bridge quality is becoming more and more higher. In recent years, the frequent accidents of bridge collapse have brought forward even stricter requirements on bearing capacity and safety of bridge. It’s a tendency that bridge plates will be selected to build steel structure bridges in the future. More and more railways and highways are being changed into viaduct to save land and reduce the damage to the natural environment. Even though the bridge steel plates are just conventional steel, it has a huge potential for development.

    1. Detailed information

    Size, steel grade and as-rolled status

    Structural Steel for Bridge

    Standard

    Steel Grade

    Product Size (mm)

    As-rolled status

    Chinese Standard

    GB/T714, technical agreements

    Q345qC, Q345qD, 345qE,  Q370qC, Q370qD, Q370qE, Q420qC, Q420qD, Q420qE, Q460qC, Q460qD, Q460qE

    6-80 *1600-3200

    AR, CR, TMCP, N

    European standard

    EN 10025

    S235J2, S235JO, S235JR, S275JR, S355J2, S355JO, S355JR, S355K2, S355NL, S355M, S355ML, S420M, S460M

    6-80*1600-3200

    AR, CR, TMCP, N

    American standard

    ASTM

    A709-50T, A709-50F, A709Gr50

    6-100 *1600-3200

    AR, CR, N

    Chemical composition Wt%
    Chinese standard:

    Steel grade

    Rank

    C

    Si

    Mn

    P

    S

    Cr

    Ni

    Cu

    B

    N

    Als

    Q235q

    C

    ≤0.17

    ≤0.35

    ≤1.40

    ≤0.030

    ≤0.030

    ≤0.30

    ≤0.30

    ≤0.30

    /

    ≤0.012

    ≥0.015

    D

    ≤0.025

    ≤0.025

    ≤0.80

    ≤0.50

    ≤0.55

    E

    ≤0.020

    ≤0.010

    ≤0.50

    Q345q

    C

    ≤0.20

    ≤0.55

    0.90-1.70

    ≤0.030

    ≤0.025

    ≤0.50

    D

    ≤0.18

    ≤0.025

    ≤0.020

    ≤0.50

    E

    ≤0.18

    ≤0.020

    ≤0.010

    ≤0.50

    Q370q

    C

    ≤0.18

    1.00-1.70

    ≤0.030

    ≤0.025

    ≤0.50

    ≤0.004

    D

    ≤0.025

    ≤0.020

    ≤0.50

    E

    ≤0.020

    ≤0.010

    ≤0.70

    Q420q

    C

    ≤0.18

    1.00-1.70

    ≤0.030

    ≤0.020

    ≤0.70

    D

    ≤0.025

    ≤0.020

    ≤0.70

    E

    ≤0.020

    ≤0.010

    ≤0.70

    Q460q

    C

    ≤0.18

    1.00-1.80

    ≤0.030

    ≤0.020

    ≤0.70

    D

    ≤0.025

    ≤0.015

    ≤0.70

    E

    ≤0.020

    ≤0.010

    ≤0.70



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