



18Cr2Ni4W round steel
18Cr2Ni4W forged ring
18Cr2Ni4W steel plate
Brand: 18Cr2Ni4WA
Standard: GB/T 3077-1988
Chemical composition of 18Cr2Ni4W round steel
Carbon C: 0.13 ~ 0.19
Silicon Si: 0.17 ~ 0.37
Manganese Mn: 0.30 ~ 0.60
Sulfur S: Allowable residual content ≤0.025
P: Allowable residual content ≤0.025
Chromium: 1.35 ~ 1.65
Nickel: 4.00 ~ 4.50
Copper Cu: Allowable residual content ≤0.025
Tungsten W: 0.80 ~ 1.20
Mechanical properties of 18Cr2Ni4W round steel
18Cr2Ni4W round steel tensile strength σb (MPa) : ≥1180
18Cr2Ni4W round steel yield strength σs (MPa) : ≥83
Elongation δ5 (%) : ≥10
Section shrinkage (%) : ≥45
Impact power Akv (J) : ≥78
Impact toughness value αkv (J/cm²) : ≥98(10)
18Cr2Ni4W round steel hardness: ≤269HB
Sample size: sample blank size is 15mm
Heat treatment specification and metallographic structure of 18Cr2Ni4W round steel
Heat treatment specification: quenching: 950ºC for the first time, 850ºC for the second time, air cooling; Tempering 200ºC, water cooling, air cooling.
Delivery status
Delivery in a heat treatment (normalizing, annealing or high temperature tempering) or no heat treatment condition, which shall be indicated in the contract.