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PSL1 PSL2 Grade Chemical Components (%) Mechanical Properties C Si Mn P S Tensile STrength(Mpa) Yield STrength(Mpa) ASTM A53 A ≤0.25 - ≤0.95 ≤0.05 ≤0.06 ≥330 ≥205 B ≤0.30 - ≤1.2 ≤0.05 ≤0.06 ≥415 ≥240 ...