JIS3101:SS400,SS490 and JIS3106:SM400A/B/C,SM490A/B/C,SM490YA/B,SM520B/C steel

JIS G3101 standard steel is general structure rolled steel,the graders include SS400,SS490,SS300,SS540. This standard is applicable to hot rolled steel, such as bridges, ships, vehicles and other structural parts.

JIS G3106 is welding structure rolled steel,the graders include SM400A/B/C,SM490A/B/C,SM490YA/B,SM520B/C steel.This standard is applicable to bridges, ships, vehicles, oil tanks, containers and other structural parts with good welding performance of hot rolled steel.

SS400 steel is a general structural steel with a tensile strength of 400 MPa.SS400 steel plate is equivalent to domestic grades Q235.and SM400A/B/C is a welding structural steel with a tensile strength of 400 MPa. it equivalent to domestic grades Q235A/B/C.

SS490 steel has 490MPa tensile strength,and SS400, SS490 scope: steel plate, steel strip, section steel, flat steel and steel bars.

The type of SM490 steel has 3 kinds of  grades: SM490A SM490B SM490C SM490YA SM490YB SM490A,Japan JIS standard welding structure with steel, the corresponding Japanese JIS standard structural steel SS490, equivalent to the domestic grades low alloy Q345B.

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