9W18Cr4V High Speed Steel
chemical constitution
C: 0.90—1.00
Si: ≤0.40
Mn: ≤0.40
S: ≤0.030
P: ≤0.030
Cr: 3.80—4.40
V: 1.00—1.40
W: 17.5—19.0
Mo: ≤0.30