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ASTM A514Grade Q(A514GRQ) Carbon Steel Plate Chemical Composition and Mechanical Property Grade C Mn P S SI Ni Cr Mo V Ti Zr Cu B A514GrQ 0.14-0.21 0.95-1.30 ≤0.035 ≤0.04 0.15-0.35 1.20-1.50 1.00-1.50 ...