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Alloy Steel Rod 42CrMo4
GB/T 3077 | JIS | AISI/SAE | DIN | BS | ISO |
20Mn2-50Mn2 | SMn420-SMn443 | 1320-1345 | 20Mn5-50Mn7 | 150M19-160M36 | 22Mn6-42Mn6 |
15Cr-50Cr | SCr415-445 | 5115-5150 | - | 527A17 | 20Cr4-41Cr4 |
15CrMo | SCM415 | - | 15CrMo5 | 1653 | - |
35CrMo | SCM435 | 4137 | 34CrMo1 | - | - |
30CrMo | SCM420 | 4130 | 25CrMo4 | 25CrMo4 |
|
30CrMoA | SCM430 | 4130 | 34CrMo4 | 34CrMo4 |
|
42CrMo | SCM440 | 4140 | 42CrMo4 | 708M40 |
|
- | - | F11-91 | - | - | - |
38CrMoAl | SACM645 | - | - | - | 41CrAlMo74 |
50CrV | - | 6150 | 51CrV4 | - | - |
15-20CrMn | SMnC420 | 5115-5120 | 16MnCr5 |
| 16MnCr5 |
GCr15 | - | SAE52100 | 100Cr6 | - | - |
GCr15SiMn | - | - | 100CrMnSi6-4 | - | - |
20CrMnMo(H) | SCM421(H) | 4119 | - | - | - |
40CrMnMo | SCM440 | 4142 | 42CrMo4 | 708A42 | 42CrMo4 |
20-50CrNi | SNC436 | 3115-3150 | 40NiCr6 | 640M40 | - |
12CrNi2 | SNC415 | 3415 | 14NiCr10 | - | - |
20CrNiMo | SNCM220 | 8620 | 21NiCrMo2 | 805M20 | 20NiCrMo2 |
34CrNiMo | - | - | 34CrNiMo6 | - | - |
34CrNi1Mo | - | - | 34CrNi1Mo6 | - | - |
40CrNiMo | SNCM439 | 4340 | 36CrNiMo4 | 816M40 | - |
Forging
Heat slowly and uniformly to 1000°C. After forging cool slowly.
Annealing:
Heat slowly to 780°C. Slowly cool in furnace.
Hardening:
Pre heat to 600-700°C until heated through. (Austenitizing temperature 1025°C.) Continue heating to the final hardening temperature of 980-1050°C and allow the component to be heated through. Protect against decarburisation by using neutral salt bath, controlled atmosphere furnace or vacuum. Air cool or quench in oil.
Tempering:
Heat uniformly and thoroughly at the selected tempering temperatures and hold at heat for one hour per inch of total thickness. Double tempering is recommended.
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