Which steel grade is equivalent to JIS SM400A plates

The company attaches great importance to systematic management, and has passed the JIS SM400A plates ISO9001 quality management system, ISO14001 environmental management system, OHSAS18001 occupational health and safety management system, and ISO 9001: 2008 certification. Insist on JIS SM400A plates quality and promote brand development. The company's physical and chemical testing equipment is fully equipped and the quality management operation is standardized. Since 2002, the national, provincial, and municipal product quality inspection random inspection pass rates are all 100%.

As the name implies, automobile steel plate is a special steel plate material used in automobile manufacturing. With the increasing quality of people's lives nowadays, the demand for automobiles is also increasing, making the automobile manufacturing and sales industries very hot in recent years. Automobile steel plates are undoubtedly one of the important materials for automobile construction, and the quality requirements for JIS SM400A plates, automobile steel plates in automobile manufacturing are also very high. The quality of automotive steel plates is directly related to the quality and safety of automotive products and pricing.

Grades JIS SM400A plates, Q345 (16Mn) and Q390 steel have good comprehensive mechanical properties, good welding performance, cold and hot workability and corrosion resistance. C, D, E grade steel has good low temperature toughness. Mainly used for ships, boilers, pressure vessels, petroleum storage tanks, bridges, power station equipment, lifting and transportation machinery and other higher-load welding structural parts.

Mg element can reduce the number, size, distribution and morphology of inclusions in steel such as JIS SM400A plates. Micro Mg can improve the size and distribution of carbides in bearing steel. And the carbide particles of bearing steel containing magnesium are fine and uniform. When Mg content is 0.002% - 0.003%, the tensile strength and yield strength of the steel increase by more than 5%, and the plasticity remains basically unchanged.

JIS SM400A plates, No.45 seamless pipe belongs to high quality carbon structural steel. The carbon (C) content of No.45 seamless pipe is 0.42 ~ 0.50%, Si content is 0.17 ~ 0.37%, Mn content is 0.50 ~ 0.80%, Cr content is ≤ 0.25%, Ni content is ≤ 0.30%, Cu content is ≤ 0.25%. The tensile strength, yield strength, elongation, reduction of area and impact energy of No.45 seamless pipe are 600 MPa, 355 MPa, 16% and 40% respectively. No.45 seamless pipe is used to manufacture high strength moving parts.

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