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Alloy steel grade 20MnCr5 equivalent to 20CrMn Steel Tubes with alloy steel grade 20MnCr5: 20MnCr5 C:0.17-0.22, Mn:1.10-1.50, P≤0.035, S≤0.10-0.050, Cr:1.00-1.30, Si≤0.25 20CrMn C:0.17-0.23, Mn: 0.90...