• JIS G3106 Steel Plate
  • JIS G3106 specification is for hot rolled carbon steel plate for welded structrual purposes, steel grades include: SM400A/B/C, SM490A/B/C, SM490YA/YB, SM520B/C,SM570.

    Appication:
    SM400A/B/C: Carbon steel shapes, plates, and bars of structural quality for use in riveted, bolted, or welded construction of bridges and buildings, and for general structural purposes.
    SM490A/B/C: Hot rolled steel plate used for outside engineering, ships, military (armored) construction.
    SM490YA/YB: Super heavy steel plate for welded structure of bridges, highway construction.
    SM520B/C: Super heavy steel plate for welded structure, it is also low carbon high strength structural steel with good cold forming property.
    SM570: Low alloy and high strength steel plate, heavy and wide plate for machinery parts, boom, crane, chassis, buildings bridges and mobile equipment.

    JIS G3106 Chemical Composition:

    Symbol  Chemical composition
    C max Simax Mn P max S max
    SM400A 0.23 - 2.5xc min 0.035 0.035
    SM400B 0.20 0.35 0.6-1.40 0.035 0.035
    SM400C 0.19 0.35 1.4 max 0.035 0.035
    SM490A 0.20 0.55 1.6 max 0.035 0.035
    SM490B 0.19 0.55 1.6 max 0.035 0.035
    SM490C 0.19 0.55 1.6 max 0.035 0.035
    SM490YA 0.20 0.55 1.6 max 0.035 0.035
    SM490YB 0.20 0.55 1.6 max 0.035 0.035
    SM520B 0.20 0.55 1.6 max 0.035 0.035
    SM520C 0.20 0.55 1.6 max 0.035 0.035
    SM570 0.19 0.55 1.6 max 0.035 0.035

    JIS G3106 Mechanical Property:

    Symbol Yield point or proof stressN/mm2 (min) Tensile strengthN/mm2 Elongation
    Thickness of steel mm Thickness of steel mm thinckness Test piece % min
    16 or under Over 16-40 100 or under

    SM400A

    SM400B

    SM400C

    245 235 400-510 <5 NO.5 23
    ≥5 <16 NO.1A 19
    ≥16 <50 NO.1A 22

    SM490A

    SM490B

    SM490C

    325 315 490-610 <5 NO.5 22
    ≥5 <16 NO.1A 17
    ≥16 <50 NO.1A 21

    SM490YA

    SM490YB

    365 355 490-610 <5 NO.5 19
    ≥5 <16 NO.1A 15
    ≥16 <50 NO.1A 19

    SM520B

    SM520C

    365 355 520-640 <5 NO.5 19
    ≥5 <16 NO.1A 15
    ≥16 <50 NO.1A 19
    SM570 460 450 570-720 <5 NO.5 19
    ≥5 <16 NO.5 26
    ≥16 <50 NO.5 20

    JIS G3106 Charp Absorption Energy:

    Symbol of grade Test temperature °C Charp Absorption Energy J (min) Test piece
    SM400B 0 27 No.4 in rolling direction
    SM400C 0 47
    SM490B 0 27
    SM490C 0 47
    SM490YB 0 27
    SM520B 0 27
    SM520C 0 47
    SM570 -5 47

    JIS G3106 Equivalent Steel Standard:

    ASTM DIN BS EN AFNOR UNI JIS GOST
    A 570
    Gr.40
    S275JRSt44-2 Fe 430 B FN
    1449 43/25 HR
    E 28-2 AE 275 B
    Fe 430 B FN
    SM 400 A;B;C St4ps; sp
    A 572 Gr.65 E335 (Fe 590-2)
    St 60-2
    Fe 60-2
    4360-55 E; 55 C
    A 60-2 Fe 60-2
    Fe 590
    SM 570 St6ps; sp

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