According to ASTM A516 standard, it divides into four grades of 55/60/65/70, and A516 Grade 70 material is the most used one. A516 Grade 70 plates thickness are 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. A516 Grade 70 steel coils are excluded from qualification to this specification until they are cutted into plates.
Standard: ASTM A516
Grade: A516 Gr50, A516 Gr60 and A516 Gr65, A516 Gr70
Thickness: 8mm-300mm,
Width: 1500-4020mm,
Length: 3000-27000mm
Form: coils, foils, rolls, plain sheet, shim sheet,flats,bars,
Finish: Hot rolled plate (HR), Cold rolled sheet (CR), 2B, 2D, BA NO(8), SATIN (Met with Plastic Coated)
Hardness: Soft, Hard, Half Hard, Quarter Hard, Spring Hard etc..
A516 Grade 70 Plate Heat Treatment
A516 Grade 70 Plates in thickness of 40 mm [1.5 in] or under it normally supplied in as-rolled condition. In case require normalized or stress relieved shall be informed before the order. A516 Grade 70 Plates over 40 mm [1.5 in] thickness shall be normalized. In case notch-toughness tests are required on plates 1.5 in [40 mm] and under this thickness, the plates shall be normalized unless otherwise specified by the purchaser.
Agreed by purchaser, cooling rates faster than cooling in air are permissible for improvement of the toughness, provided the plates are subsequently tempered in 1100 to 1300℉ [595 to 705 ℃].
