- 1050 according to American AISI standards
- C50 according to German DIN standards
- S50C following JIS, NIPPON, and HITACHI standards of Japan
Element
|
Percentage (%)
|
C
|
0.47 ~ 0.53
|
Si
|
0.15 ~ 0.35
|
Mn
|
0.6 ~ 0.9
|
Ni
|
≤0.20
|
Cr
|
≤0.20
|
P
|
≤0.030
|
S
|
≤0.035
|
Process
|
Conditions
|
Annealing
|
~600°C, slow cooling
|
Quenching
|
800 ~ 850°C, oil
|
Tempering
|
180 ~ 200°C, air
|
Hardness (HRC)
|
40 ~ 50
|
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