AISI 4140
Low Alloy Steel
AISI 4140 is a chromium-molybdenum alloy steel known for its high strength, toughness, and wear resistance. It contains approximately 0.38-0.43% carbon, 0.9-1.2% chromium, and 0.15-0.25% molybdenum, making it suitable for hardening through heat treatment. AISI 4140 is commonly used in applications like gears, axles, and heavy machinery components due to its excellent mechanical properties and ability to withstand high stress. It can be easily machined and welded, although preheating is recommended for welding to prevent cracking. Its versatility makes AISI 4140 a popular choice in both industrial and automotive sectors.
Equivalent/Similar Standards
| Standard | Material Name |
|---|---|
| AISI | 4140 |
| WNR | 1.7227 1.7225 |
| UNS | G41400 |
| EU EN | 42CrMoS4 42CrMo4 |
| USA | 4140 4142 |
| Germany DIN | 42CrMoS4 42CrMo4 |
| Japan JIS | SCM440H |
| France AFNOR | 42CD4u 42CD4 |
| UK BS | 708M40 CFS11 |
| Italy UNI | 42CrMo4 |
| China GB | 42CrMo |
| Sweden SS | 2244 |
| Finland SFS | 42CrMo4 |
| Inter ISO | 42CrMo4 |
| Russia GOST | 35KHM 38KHM |
