合金结构钢：12MF4 A52C1 A52C2 A52CR1 A52CR2 20M5 32M5 35M5 40M5 45M5 55M5 38MS5 38MB5 20MB5 12C3 18C3 18C4 28C4 32C4 38C4 42C4 45C4 50C4 12CD4 15CD4.05 18CD4 20CD4 30CD4 35CD4 40CD4 42CD4 40CAD6.12 22CrV4 42CrV4 50CV4 16MC5 20MC5 20NC6 35NC6 10NC11 14NC11 10NC12 14NC12 20NC11 30NC11 30NC12 35NC15 12NC15 20NC14 20NCD2 35NCD5 40NCD3