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ASME SA656/SA656M Grade 70 Carbon and Low-alloy High-strength Steel Coil Chemical Composition and Mechanical Property Grade C Mn P S Si V N Nb SA656Gr.70 ≤0.18 ≤1.65 ≤0.025 ≤0.035 ≤0.60 ≤0.08 ≤0.02 ≤0...