Stainless steel rod grades: SUS440F
Standard: GB / T 1220-1992
● Features and application:
SUS440F improve the cutting of steel. Automatic Lathe.
● Chemical Composition:
Carbon C: 0.95 ~ 1.20
Si Si: ≤ 1.00
Manganese Mn: ≤ 1.25
Sulfur S: ≤ 0.15
Phosphorus P: ≤ 0.060
Chromium Cr: 16.00 ~ 18.00
Ni: to allow containing ≤ 0.60
Mo Mo: ≤ 0.75 can be added
● Mechanical Properties:
Hardness: Annealed, ≤ 269HB; quenching and tempering, ≥ 58HV
● Heat treatment and microstructure specifications:
Heat treatment specifications:
1) annealing, 800 ~ 920 ℃ slow cooling;
2) quenching, 1010 ~ 1070 ℃ oil cooling
3) tempering, 100 ~ 180 ℃ fast-cooling. Microstructure: Organizing for the martensitic type.
● Delivery status: normal to heat treatment delivery, the treatment types specified in the contract; not indicated, according to the heat treatment state of delivery.