ASTM A516 steel plate for welded boilers and pressure vessels with high requirements for notch toughness; according to ASTM A516 steel plate thickness <12.5mm, >12.5-50mm, >50-100mm, >100-200mm, >200mm, the upper limit of C content can be up to 0.31 %.
ASTM A516 steel plate thickness <12.5mm, >12.5mm set Mn composition, <12.5mm Gr.55 grade: Mn 0.60-0.90%, Gr.6 grade Mn 0.60-1.20%, Gr. 65.Gr.70 grade: Mn 0.85-1.20%;>12.5-50mm Gr. 55: Mn 0.60-1.20%, Gr.60, Gr.65, Gr.70: Mn 0.85-1.20%. All grades of ASTM A516 steel plate S, P<0.035%. ASTM A516 steel plate requires fine austenite grain size, that is, fully killed steel. ASTM A516 steel plates with a thickness <40mm are usually supplied in a rolled state, but ASTM A516 steel plates with impact requirements must be normalized. Steel plates with ASTM A516 steel plate thickness > 40mm must be normalized. Considering weldability, all grades have carbon equivalent requirements.
Yield strength of ASTM A516 steel plate: Gr. 55 grade ReH>205MPa, Gr. 60 grade: ReH>220MPa, Gr. 65 grade ReH>240MPa, Gr. Low 20-100MPa.
Tensile strength of ASTM A516 steel plate: Gr. 55 grade Rm 380-515MPa, Gr. 60 grade: Rm 415-550MPa, Gr. 65 grade Rm 450585MPa Gr. quite. The allowable negative deviation of ASTM A516 steel plate thickness is -0.3mm, which is the same as the negative deviation required by my country's GB712-2000 "Structural Steel for Ship Hull". The allowable positive deviation of thickness is wider than that required by my country's steel plate size deviation standard GB/T709-2006.
Users usually require ultrasonic inspection, and the inspection standard is ASTMA578/A578M. There are restrictions on unspecified elements Nb, V, Ti, and residual elements Cr, Ni, Cu, and Mo, which are reflected in the quality certificate. The mechanical test specimen of ASTM A516 steel plate adopts 200mm gauge length or 50mm gauge length. Different from the ratio sample requirements commonly used in China, the impact sample is a longitudinal sample.
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