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  • Current Location : Home > Application > Scope of application > Bridge
    Bridge
    Time:2019-07-10 Source:Tisco Hits:

      By adopting the process including high quality hot iron+ scrap melting, LF+RH refining, precise chemical composition controlling, serous control and nature transforming of inclusion, bridge steel made by TISCO INDUSTRIAL CO.,LIMITED has stable and excellent comprehensive properties, such as high strength, high toughness, low yield strength ratio, high lamellar tearing resistance and easy welding, capable of meeting the quality requirement of large highway and railway bridges.

      Typical Steel Grades/Specifications

    Steel/Grades

    Specifications

    Size Range

    Delivery condition

    Q235qC/D/E
    Q345qC/D/E
    Q370qC/D/E
    Q420qC/D/E

    GB/T714 OR Technical Agreement

    5~12

    AR/NR/N/TMCP

    >12~100

    CR/NR/N/TMCP

    >100~150

    CR/NR/N

    >150~250

    N

    Q460qC/D/E

    5~12

    AR/NR/N/TMCP/QT

    >12~100

    CR/NR/N/TMCP/QT

    >100~150

    N/QT

    Q500q/D/E
    Q550q/D/E

    5~70

    TMCP/TMCP+T/QT

    >70~150

    TMCP+T/QT

    A709 Gr36(250)
    A709 Gr50(250)

    ASTM A709/A709M or Technical Agreement

    5~12

    AR/NR/N/TMCP

    >12~100

    CR/NR/N/TMCP

    >100~150

    N

    A709 Gr50W(345W)
    A709 HPS Gr50W(345W)

    5~100

    AR/NR/TMCP/QT

    A709 HPS Gr70W(485W)

    5~100

    TMCP/TMCP+T/QT

    A709 HPS Gr70W(690W)

    5~100

    QT

    S235J0/JR/J2/N/NL/M/ML
    S275J0/JR/J2/N/NL/M/ML
    S355J0/JR/J2/K2/N/NL/M/ML
    S450J0
    S420/N/NL/M/ML
    S460/N/NL/M/ML
    S500Q/QL/QL1
    S690Q/QL/QL1

    EN10025 or Technical Agreement

    5~12

    AR/NR/N/TMCP

    >12~100

    CR/NR/N/TMCP

    >100~150

    CR/NR/N

    >150~250

    N

      Chemical Composition (wt%)

    Grades/Grade

    C

    Si

    Mn

    P

    S

    Nb、V、Ti

    Q345q

    ≤0.18

    0.15-0.40

    ≤1.7

    ≤0.015

    ≤00.005

    Nb+V+Ti≤0.12

    Q370q

    ≤0.18

    0.15-0.40

    ≤1.7

    ≤0.012

    ≤00.005

    Nb+V+Ti≤0.12

    Q420q

    ≤0.18

    0.15-0.40

    ≤1.7

    ≤0.012

    ≤00.005

    Nb+V+Ti≤0.12

    Q460q

    ≤0.18

    0.15-0.40

    ≤1.7

    ≤0.012

    ≤00.005

    Nb+V+Ti≤0.12

    Q500q

    ≤0.09

    0.15-0.40

    ≤1.7

    ≤0.010

    ≤00.005

    Nb+V+Ti≤0.12

    A709 Gr.50

    ≤0.18

    0.15-0.40

    ≤1.6

    ≤0.015

    ≤00.005

    Nb+V+Ti≤0.12

    A709 HPS 70W

    ≤0.11

    0.15-0.40

    ≤1.5

    ≤0.012

    ≤00.005

    Nb+V+Ti≤0.12

      Mechanical Properties

    Grades

    Size (mm)

    Rel (Mpa)

    Rm (Mpa)

    A%

    -40℃ KV2 ( J)

    Q370qE

    10

    420

    565

    28

    169

    60

    416

    570

    32

    296

    Q420qE

    10

    485

    640

    31

    202

    60

    470

    620

    32

    310

    Q460qE

    40

    526

    672

    29

    265

    100

    496

    630

    28

    212

    Q500qE

    20

    570

    695

    26

    320

    64

    555

    680

    25

    310


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