常用金属材料化学成分

0.50~0.80 ≤0.015 ≤0.018 0.70~1.10 0.25~0.40 2.75~3.25 25CrNiMoV JB/T 7022 -2002 0.22~0.28 ≤0.30 0.30~0.60 ≤0.015 ≤0.018 1.00~1.30 0.25~0.40 1.00~1.50 30Cr2Ni4MoV JB/T 7022 -2002 ≤0.35 0.15~0.30 0.20~0.40 ≤0.012 ≤0.012 1.50~2.00 0.30~0.60 3.25~3.75 45A JB/T 7023 -2002 0.42~0.50 0.17~0.37 0.50~0.80 ≤0.025 ≤0.020 50A JB/T 7023 -2002 0.47~0.55 0.17~0.37 0.50~0.80 ≤0.025 ≤0.020 55A JB/T 7023 -2002 0.52~0.60 0.17~0.37 0.50~0.80 ≤0.025 ≤0.020 40CrA JB/T 7023 -2002 0.37~0.44 0.17~0.37 0.50~0.80 ≤0.025 ≤0.020 0.80~1.10 30Cr1Mo1V JB/T 7027 -2002 0.27~0.34 0.20~0.25 0.70~1.00 ≤0.012 ≤0.012 1.05~1.35 1.00~1.30 ≤0.50 30Cr2Ni4MoV JB/T 7027 -2002 ≤0.35 ≤0.10 0.20~0.40 ≤0.010 ≤0.010 1.50~2.00 0.25~0.60 3.25~3.75 25Cr2Ni4MoV JB/T 7178 -2002 ≤0.25 ≤0.10 0.15~0.35 ≤0.015 ≤0.018 1.50~2.00 0.20~0.50 3.25~4.00