| STEEL GRADE | USE | Rockweel Hardness | Implementing Standard |
|
45# (SAE1045,S45C/S48C) |
for Grade 8.8 | HRC 28-32 | GB/T 699 |
|
40Cr (SAE5140,SCr440) |
for Grade 10.9 | HRC 32-39 | GB/T 3077 |
|
35CrMo (SAE4135,SCM43/SCRRM3) |
for Grade 12.9 | HRC 39-42 | GB/T 3077 |
|
42CrMo (SAE4140,SCM440) |
for Grade 12.9 | HRC 39-42 | GB/T 3077 |
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