A516 Gr70 American ASTM standard medium and low temperature pressure vessel steel plate, the steel plate has the following characteristics: impact resistance, small temperature deformation, excellent welding performance, fatigue resistance, and laminar spalling resistance. A516 Gr70 steel plate implements ASTM A516/A516GrM-2014 standard. The smelting process of A516 Gr70 steel plate shall meet the requirements of A20/A20M fine austenite grain size.
Thickness ≤1.5in.(40mm) A516 Gr70 steel plate, usually supplied in rolled condition. A516 Gr70 steel plate can be ordered normalized or stress relieved or normalized and stress relieved. Thickness > 1.5in. (40mm) A516 Gr70 steel plate should be normalized. When notch toughness test is required for A516 Gr70 steel plate with thickness ≤1.5in. (40mm), A516 Gr70 steel plate shall be normalized, otherwise, it shall be specified by the purchaser in the order.
Cooling rates greater than those in air to improve notch toughness are permitted with the purchaser's consent, provided that the A516 Gr70 steel plate is subsequently tempered in the 1100-1300°F (595-705°C) temperature range.
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