1, number: 1.4120;
2, grade: X20CrMo13;
3, standard: DIN 17400;
There is no corresponding steel number in China, the metallurgical organization characteristics of martensitic type. Used for higher hardness and high wear resistance of hot oil pumps, valve pieces, valve bearings, medical equipment, springs and other parts.
Chemical composition: carbon C: 0.17 ~ 0.22; silicon Si: ≤ 1.00; manganese Mn: ≤ 1.00; phosphorus P: ≤ 0.045; sulfur S: ≤ 0.030; chromium Cr: 12.00 ~ 14.00; molybdenum Mo: 0.90 ~ 1.30; nickel Ni: ≤ 1.00; vanadium V: -.