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ASTM A516 GR70

ASTM A516 is the standard specification for making pressure vessels (such as oil tanks), material in carbon steel for moderate and lower temperature services, it will improve the notch toughness of the steel during the welding work.
The maximum thickness of plates is limited only by the capacity of the composition to meet the specified mechanical property requirements. And for the plates that manufactured from coil and furnished without heat treatment or with stress relieving only, the requirements and test results shall comply with A20/A20M. Coils are excluded from qualification to this specification until they are cutted into plates.