W9Mo3Cr4V steel is a general-purpose high-speed steel in the tungsten-molybdenum series, primarily composed of medium amounts of tungsten, with a small addition of molybdenum, and controlled carbon and vanadium contents to enhance performance, improve quality, and save alloy elements.

Chemical Composition

C
Si
Mn
W
Mo
Cr
V
S
P
0.77～0.85
0.20～0.40
0.20～0.40
8.50～9.50
2.70～3.30
3.60～4.20
1.30～1.60
≤0.030
≤0.030
Physical Properties

Critical Point
Ac1
Ac3
Temperature (approx.) / °C
835
875
Table 2-30-3 Elastic Modulus of W9Mo3Cr4V Steel

Temperature / ℃
Room Temperature
300
500
550
600
Elastic Modulus E/MPa
221900
209000
191600
185000
178600
Table 2-30-4 Linear (Expansion) Coefficient of W9Mo3Cr4V Steel

Temperature/°C
20～300
20～500
20～700
Thermal Expansion Coefficient (Annealed) / °C^-1
12.0×10-6
12.6×10-6
13.2×10-6
Table 2-30-5 Thermal Conductivity of W9Mo3Cr4V Steel

Temperature/°C
600
750
1100
Thermal conductivity λ / W·(m·K)−1
30.9
32.6
31.4
Hot Processing

ingot forging billet production
Furnace Temperature/°C
Heating Temperature/°C
Open forging temperature/°C
Final forging temperature/℃
Cooling

700
1160～1190
1080～1120
≥950
Timely annealing or sand quenching


Hot Rolled
Raw blank size/mm
Heating Temperature/°C
Heating Time
Starting Rolling Temperature/℃
Final Rolling Temperature/°C
Cooling
80 cu ft
Φ40
1100～1150
1080～1120
2h30min～3h
15～25min
1090～1120
1050～1100
≥900
≥900
Air cool after slow cooling
Austenitizing after slow cooling