Q420 steel plate

Q420 steel plate

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Q420 steel is a Chinese steel grade of Low Alloy High Strength Structural Steel, Yield Strength is 420 MPa and tensile strength is 520-680 Mpa, the material density is 7.85 g/cm3.A wide variety of q420 steel options are available to you, such as hot rolled, cold rolled. You can also choose from steel plate, steel coil, and alloy steel bar q420 steel

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    • Commodity name: Q420 steel plate

    Q420 steel is a Chinese steel grade of Low Alloy High Strength Structural Steel, Yield Strength is 420 MPa and tensile strength is 520-680 Mpa, the material density is 7.85 g/cm3.A wide variety of q420 steel options are available to you, such as hot rolled, cold rolled. You can also choose from steel plate, steel coil, and alloy steel bar q420 steel

    Product information

    Q420 Steel Introduction
    Q420 steel is a Chinese steel grade of Low Alloy High Strength Structural Steel, Yield Strength is 420 MPa, parameters are tested with 16mm diameter steel bars or steel plates, and tensile strength is 520-680 Mpa, the material density is 7.85 g/cm3. According to GB/T 1591-2008, Q420 has 5 quality levels: Q420A, Q420B, Q420C, Q420D and Q420E. For Q420 steel equivalent, chemical composition and mechanical properties, please see the tables below content.
    Features and Uses
    Q420 steel has high strength, especially in normalized or normalized plus tempered state, with high comprehensive mechanical properties, can be used in large ships, bridges, power station equipment, medium and high pressure boilers, high pressure vessels, lifting machinery, mining machinery and other large welded structural parts.
     

    Chemical composition & Mechanical property

    Chemical Composition of Q420 Steel

        Chemical Composition % (GB/T 1591 – 2008)
    Steel Grade Grade C (≤) Si (≤) Mn (≤) P (≤) S (≤) Nb (≤) V (≤) Ti (≤) Cr (≤) Ni (≤) Cu (≤) N (≤) Mo (≤) B (≤) Als (≥)
    Q420 Q420A 0.20 0.50 1.70 0.035 0.035 0.07 0.20 0.20 0.30 0.80 0.30 0.015 0.20
    Q420B 0.035 0.035
    Q420C 0.030 0.030 0.015
    Q420D 0.030 0.025 0.015
    Q420E 0.025 0.020 0.015

     

        Chemical Composition % (GB/T 1591 – 2018)
    Steel Grade Grade C (≤) Si (≤) Mn (≤) P (≤) S (≤) Nb (≤) V (≤) Ti (≤) Cr (≤) Ni (≤) Cu (≤) N (≤) Mo (≤) B (≤)
    Q420 Q420B 0.20 0.55 1.70 0.035 0.035 0.05 0.13 0.05 0.30 0.80 0.40 0.015 0.20
    Q420C 0.030 0.030

    Table-2, Carbon Equivalent Value (CEV)
    Steel delivered in hot rolled state (based on smelting analysis)

        CEV (Mass fraction ≤%); Nominal thickness or diameter Ø
    Steel Grade Quality Grade ≤ 30 30 < Ø ≤ 63 63 < Ø ≤ 150 150 < Ø ≤ 250 250 < Ø ≤ 400
    Q420 Q420B 0.45 (CEV) 0.47 0.48 0.49
    Q420C

    Table-3, Q420 Steel Mechanical Properties (Hot rolled)

        Thickness or Dia. (Ø) mm; Yield Strength (≥N/mm2)
    Steel Grade Quality Ø≤16 16< Ø ≤40 40 < Ø ≤63 63 < Ø ≤ 80 80 < Ø ≤ 100 100 < Ø ≤ 150 150 < Ø ≤ 200 200 < Ø ≤ 250 250 < Ø ≤ 400
    Q420 Q420B 420 410 390 370 370 350
    Q420C
        Dia. (Ø) mm; Tensile Strength (N/mm2)
    Steel Grade Quality Level Ø≤100 100 < Ø ≤ 150 150 < Ø ≤ 250 250 < Ø ≤ 400
    Q420 Q420B 520 – 680 500 – 650
    Q420C

    Table-4, Elongation

        Dia. (Ø) mm; Elongation (%)
    Steel Grade Sample direction Ø≤40 40 < Ø ≤ 63 63 < Ø ≤ 100 100 < Ø ≤ 150 150 < Ø ≤ 200 250 < Ø ≤ 400
    Q420 Horizontal 20 19 19 18
    Vertical 21 20 20 19

    Q420 steel equivalent to US ASTM, European EN, Germany DIN, Japan JIS, France NF, UK BS and ISO standard (For reference purposes only)

    China USA Germany Japanese France UK ISO
    Standard Grade Standard Grade Standard Grade Standard Grade Standard Grade Standard Grade Standard Grade
    GB/T 1591 – 2008 Q420A ASTM A572M,
    ASTM A633M
    Gr.60,
    Gr.E
            NF A36-201 E420-1     ISO 4996,
    ISO 4951
    HS420D
    E420CC
    GB/T 1591 – 2008 Q420B ASTM A572M,
    ASTM A633M
    Gr.60,
    Gr.E
    DIN EN 10113-2,
    DIN EN 10113-3
    S420NL,
    S420ML
    JIS G3124 SEV295,
    SEV345
    NF EN 10113-2,
    NF EN 10113-3
    S420NL,
    S420ML
    BS EN 10113-2,
    BS EN 10113-3
    S420NL
    S420ML
    ISO 4996,
    ISO 4951
    HS420D
    E420CC
    GB/T 1591 – 2008 Q420C ASTM A678M,
    ASTM A656M
    Gr.B,
    TyPe7
    DIN EN 10113-2,
    DIN EN 10113-3
    S420NL,
    S420ML
    JIS G3124 SEV295,
    SEV345
    NF EN 10113-2,
    NF EN 10113-3
    S420NL,
    S420ML
    BS EN 10113-2,
    BS EN 10113-3
    S420NL
    S420ML
    ISO 4996,
    ISO 4951
    HS420D
    E420CC
    GB/T1591 – 2008 Q420D ASTM A678M,
    ASTM A656M
    Gr.B,
    TyPe7
    DIN EN 10113-2,
    DIN EN 10113-3
    S420NL,
    S420ML
    JIS G3124 SEV295,
    SEV345
    NF EN 10113-2,
    NF EN 10113-3
    S420NL,
    S420ML
    BS EN 10113-2,
    BS EN 10113-3
    S420NL
    S420ML
       
    GB/T1591 – 2008 Q420E ASTM A678M,
    ASTM A656M
    Gr.B,
    TyPe7
    DIN EN 10113-2,
    DIN EN 10113-3
    S420NL,
    S420ML
    JIS G3124 SEV295,
    SEV345
    NF EN 10113-2,
    NF EN 10113-3
    S420NL,
    S420ML
    BS EN 10113-2,
    BS EN 10113-3
    S420NL
    S420ML
       
    Key words:
    • Q420 steel plate

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