Grade: 18Cr2Ni4WA
Standard: GB / T 3077-1988
In a high-strength alloy 18Cr2Ni4WA carburizing steel. To make C compounds and austenite can be used without excessive temperature after carburizing carburizing tempering 900 ~ 920 ℃, 600 ~ 650 tempering, cryogenic treatment, oil quenched hardness is 48 or so, you want to reach HRC58-63, must be carried out surface carburization.
[1] 18Cr2Ni4WA steel case-hardened steel alloy used, strength, high toughness, good hardenability, but also without carburizing and quenching in the case of the use of larger cross-section is generally used as the load is high and good toughness, and the gap low sensitivity to the important parts.
● Chemical Composition:
Carbon C: 0.13 ~ 0.19
Si Si: 0.17 ~ 0.37
Manganese Mn: 0.30 ~ 0.60
Sulfur S: allow the residual content ≤ 0.025
Phosphorus P: allow the residual content ≤ 0.025
Chromium Cr: 1.35 ~ 1.65
Ni-Ni: 4.00 ~ 4.50
Copper Cu: allow the residual content ≤ 0.025
Tungsten W: 0.80 ~ 1.20
● Mechanical Properties:
Tensile strength σb (MPa): ≥ 1175 (120)
Yield strength σs (MPa): ≥ 1029 (105)
Elongation δ5 (%): ≥ 10
Reduction of area ψ (%): ≥ 45
Impact energy Akv (J): ≥ 78
Impact toughness αkv (J/cm2): ≥ 98 (10)
Hardness: ≤ 269HB
Sample size: Sample size is 15mm rough
