25Cr2Ni4WA

Standard: GB / T 3077-1988

● Chemical Composition:

Carbon C: 0.21 ~ 0.28

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): ≥ 1080 (110)

Yield strength σs (MPa): ≥ 930 (95)

Elongation δ5 (%): ≥ 11

Reduction of area ψ (%): ≥ 45

Impact energy Akv (J): ≥ 71

Impact toughness αkv (J/cm2): ≥ 88 (9)

Hardness: ≤ 269HB

Sample size: Sample size is 25mm rough

● Heat treatment and microstructure specifications:

Standard heat treatment: quenching 850 ℃, oil cooling; tempering 550 ℃, water-cooled, oil-cooling.

Common specifications 18Cr2Ni4WA:

Ф16, Ф18, Ф20, Ф22, Ф25, Ф28, Ф30, Ф35, Ф40, Ф45, Ф50, Ф55, Ф60, Ф65

Ф70, Ф75, Ф80, Ф85, Ф90, Ф100, Ф110, Ф120, Ф130, Ф140, Ф150