Domestic steel mold: 3Cr17Mo
Standard: GB / T 1220-1992
● Features and Scope:
Used as a high hardness and high wear resistance of heat pumps, valves, valves, bearings, medical equipment, springs and other parts.
● Chemical Composition:
Carbon C: 0.36 ~ 0.45
Si Si: ≤0.60
Manganese Mn: ≤0.80
Sulfur S: ≤0.030
Phosphorus P: ≤0.035
Chromium Cr: 12.00 ~ 14.00
Ni: to allow contains ≤0.60
● Mechanical Properties:
Hardness: annealing, ≤201HB; quenching and tempering, ≥50HV
● Heat treatment and microstructure specifications:
Heat treatment specifications: 1) annealing, 800 ~ 900 ℃ slow cooling or about 750 ℃ rapid cooling; 2) quenching, 1050 ~ 1100 ℃ oil cooling; 3) tempering, 200 ~ 300 ℃ rapid cooling.
Microstructure: Organizing for the martensite type.
● Delivery status: to heat treatment delivery in general, the treatment types specified in the contract; not indicated, by not heat treatment delivery. |
