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

      The main Grades: Q345GJB/C/D/E-Z15/Z25/Z35,Q390GJC/Q390GJD/E-Z15/Z25/Z35, Q420GJC/D/E-Z15/Z25/Z35, Q460GJB/C/D/E-Z15/Z35, A572Gr42/50/65, Thickness: 6-200mm, The high rise building steel has the characteristics of high strength, high toughness, easy welding(low yield strength ratio) and high lamellar tearing resistance, etc.

      Widely used in large construction projects, such as high-rise building, super high-rise building, large-span stadiums, airports, conference and exhibition centers, and steel structure factory buildings etc.

      Typical Steel Grades/Specifications

    Grades

    Specifications

    Size Range

    Delivery Condition

    Q345GJB/C/D/E-Z15/Z25/Z35

    GB/T 19879
    Technical Agreement

    6-200

    AR/NR/N/N+T/TMCP

    Q390GJC/D/E-Z15/Z25/Z35

    Q420GJC/D/E-Z15/25/35

    AR/NR/N/N+T/Q+T/TMCP

      Properties Of Typical Grades

      Chemical Composition

    Steel

    Grades

    Chemical Composition (wt%)

    C

    Si

    Mn

    P

    S

    V

    Nb

    Ti

    Als

    Cr

    Cu

    Ni

    Q345GJ

    B

    ≤0.20

    ≤0.55

    ≤1.60

    ≤0.015

    ≤0.005

    0.02-0.15

    0.015-0.06

    0.010-0.030

    ≥0.015

    ≤0.30

    ≤0.30

    ≤0.30

    C

    D

    ≤0.18

    ≤0.55

    ≤1.60

    ≤0.015

    ≤0.005

    0.02-0.15

    0.015-0.06

    0.010-0.030

    ≥0.015

    ≤0.30

    ≤0.30

    ≤0.30

    E

    Q390GJ

    C

    ≤0.20

    ≤0.55

    ≤1.60

    ≤0.015

    ≤0.005

    0.02-0.20

    0.015-0.06

    0.010-0.030

    ≥0.015

    ≤0.30

    ≤0.30

    ≤0.70

    D

    ≤0.18

    ≤0.55

    ≤1.60

    ≤0.015

    ≤0.005

    0.02-0.20

    0.015-0.06

    0.010-0.030

    ≥0.015

    ≤0.30

    ≤0.30

    ≤0.70

    E

    Q420GJ

    C

    ≤0.20

    ≤0.55

    ≤1.60

    ≤0.015

    ≤0.005

    0.02-0.20

    0.015-0.06

    0.010-0.030

    ≥0.015

    ≤0.40

    ≤0.30

    ≤0.70

    D

    ≤0.18

    E

    Q460GJ

    C

    ≤0.20

    ≤0.55

    ≤1.60

    ≤0.016

    ≤0.005

    0.02-0.21

    0.015-0.06

    0.010-0.030

    ≥0.015

    ≤0.70

    ≤0.30

    ≤0.70

    D

    ≤0.18

    0.015-0.060

    ≥0.20

    E

      Through-thickness Characteristics


    Through-thickness Property Level

    S Content (wt%)

    Area Reduction Z(%)

    Average Value Of Three Samples

    Value Of Single Sample

    Z15

    ≤0.005

    ≥15

    ≥10

    Z25

    ≤0.005

    ≥25

    ≥15

    Z35

    ≤0.005

    ≥35

    ≥25

      CE and Pcm Values Are As Follows:


    Steel/Grades

    Delivery Condition

    CE(%)

    Pcm(%)

    ≤50mm

    >50-220mm

    ≤50mm

    >50-220mm

    Q345GJ

    AR/N/NR/N+T

    ≤0.41

    ≤0.43

    ≤0.28

    ≤0.28

    TMCP

    ≤0.38

    ≤0.40

    ≤0.24

    ≤0.26

    Q390GJ

    AR/N/NR/N+T

    ≤0.44

    ≤0.46

    ≤0.28

    ≤0.29

    TMCP

    ≤0.40

    ≤0.43

    ≤0.26

    ≤0.27

    Q420GJ

    AR/N/NR/N+T

    ≤0.47

    ≤0.49

    ≤0.30

    ≤0.32

    TMCP

    ≤0.40

    Technical Agreement

    ≤0.26

    Technical Agreement

    Q460GJ

    AR/N/NR/N+T
    Q+T/TMCP

    ≤0.43

    Technical Agreement

      ※ CE(%)=C+Mn/6+ (Cr+Mo+V)/5+ (Ni+Cu)/15

      ※ Pcm(%)=C+Si/30+Mn/20+Cu/20+Ni/60+Cr/20+Mo/15+V/10+5B

      Mechanical Properties


    Steel/Grades

    Quality Level

    KV2 (J)

    Rm(MPa)

    A (%)

    ReH (MPa)

    180oBending Test

    Yield Ratio

    Plate Thickness(mm)

    Plate thickness

    Temp

    Not Less Than

    6-16

    >16-35

    >35-50

    >50-200

    >150-200

    ≤16

    >16

    Q345GJ

    B

    20

    34

    490-610

    ≥22

    ≥345

    345-465

    335-455

    325-445

    Technical
    Agreement

    d=2a,ok

    d=3a,ok

    ≤0.83

    C

    0

    D

    -20

    E

    -40

    Q390GJ

    C

    0

    34

    490-650

    ≥20

    ≥390

    390-510

    380-500

    370-490

    d=2a,ok

    d=3a,ok

    ≤0.85

    D

    -20

    E

    -40

    Q420GJ

    C

    0

    34

    520-680

    ≥19

    ≥420

    420-550

    410-540

    400-530

    d=2a,ok

    d=3a,ok

    ≤0.85

    D

    -20

    E

    -40

    Q460GJ

    C

    0

    34

    550-720

    ≥17

    ≥460

    460-600

    450-590

    440-580

    d=2a,ok

    d=3a,ok

    ≤0.85

     

     


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