Standard: GB / T 1220-1992
● Features and application:
Improve the cutting performance than 1Cr17. Automatic lathe with bolts, nuts and so on.
● Chemical Composition:
Carbon C: ≤ 0.12
Si Si: ≤ 1.00
Manganese Mn: ≤ 1.25
Sulfur S: ≤ 0.015
Phosphorus P: ≤ 0.060
Chromium Cr: 16.00 ~ 18.00
Ni: to allow containing ≤ 0.60
Mo Mo: can be added to ≤ 0.60
● Mechanical Properties:
Tensile strength σb (MPa): ≥ 450
Conditions yield strength σ0.2 (MPa): ≥ 205
Elongation δ5 (%): ≥ 22
Reduction of area ψ (%): ≥ 50
Hardness: ≤ 183HB
● Heat treatment and microstructure specifications:
Heat treatment specifications: air-cooled 680 ~ 820 ℃ annealing or slow cooling.
Microstructure: Organizing for the ferrite.
● Delivery status: normal to heat treatment delivery, the treatment types specified in the contract; not indicated, according to the heat treatment state of delivery
