The SKD61 Chemical composition and physical properties

Physical properties
SKD61 Hardness:
Before heat treatment SKD61 about HRC15 ~~ 20 (HB200 ~~ 230)
Hardness after heat treatment: internal (HRC) is 40 ° to 45 ° surface HV1000 ± 100
The SKD61 the density was 7.85 g per cc edit this paragraph SKD61 chemical composition

SKD61 chemical composition (mass fraction) as follows (%):
C: 0.32 ~ 0.42
Si: 0.8 ~ 1.2
Mn: ≤ 0.50
Cr: 4.50 ~ 5.50
Mo: 1.00 ~ 1.50
V: 0.8 ~ 1.2
S: ≤ 0.03
P: ≤ 0.03