42CrMo4 chrome molybdenum steel is versatile alloy steel that possesses good tensile and shock resistance properties combined with ductility. 42CrMo4 chrome molybdenum steel is resistant to wear, and can be considerably increased by flame hardening (for maximum wear and abrasion resistance).
42CrMo4 chrome molybdenum steel equivalent grades:
| USA | German | Japan | China | ISO |
| ASTM 29/A29M | DIN 17350 | JIS G4404 | GB/T 1229 | ISO 683/18 |
| 4140 | 1.7225/42CrMo4 | SCM440 | 42CrMo | 42CrMo4 |
Chemical Composition of 42CrMo4 chrome molybdenum steel equivalent grades:
| ASTM A29/A29M | C | Si | Mn | P | S | Cr | Mo |
| 4140/G41400 | 0.35～0.40 | 0.20～0.35 | 0.70～0.90 | 0.025 Max | 0.025 Max | 0.80～1.10 | 0.18～0.25 |
| DIN 17220, EN 10083 | C | Si | Mn | P | S | Cr | Mo |
| 1.7225/42CrMo4 | 0.38～0.45 | ≤0.40 | 0.60～0.90 | 0.035 Max | 0.035 Max | 0.90～1.20 | 0.15～0.30 |
| GB/T 1229 | C | Si | Mn | P | S | Cr | Mo |
| 42CrMo | 0.38～0.45 | 0.17～0.37 | 0.50～0.80 | 0.030 Max | 0.030 Max | 0.90～1.20 | 0.15～0.25 |
| JIS G4105 | C | Si | Mn | P | S | Cr | Mo |
| SCM440 | 0.38～0.43 | 0.15～0.35 | 0.60～0.85 | 0.030 Max | 0.030 Max | 0.90～1.20 | 0.15～0.30 |
42CrMo4 chrome molybdenum steel number is 1.7225. It is used for Structural products. 42CrMo4 chrome molybdenum steel is suitable for the manufacture of large and medium-sized plastic molds requiring a certain degree of strength and toughness, transmission gears, rear axles, load-carrying connecting rods, spring clips and oil deep well drill pipe joints.
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