AISI4140 42CrMo4 Alloy Steel has good machinability, small processing deformation, good fatigue resistance, medium and so on Hardenability steel. After 4140 heat treatment, it has good strength and good comprehensive mechanical properties, good processability, high yield. The maximum service temperature is 427 ℃. 4140 has high strength, hardenability, good toughness, small deformation during quenching, high creep strength and endurance strength at high temperature. It can be used to manufacture forgings with higher strength and larger quenching and tempering section than 35CrMo steel, such as large gear for locomotive traction, transmission gear for supercharger, rear axle, connecting rod and spring clamp with great load, drill pipe joint and fishing tool for oil deep well below 2000m, and die for bending machine, etc.
1.Chemical Composition and Mechanical Properties(In Quenched & Tempered State):
Material | 4140 | ||
Chemical Composition | Mechanical Properties(In Quenched & Tempered State) | ||
C | 0.38-0.45 | Tensile strength(MPA) | ≥1080 |
Si | 0.17-0.37 | Yield strength (MPA) | ≥930 |
Mn | 0.50-0.80 | Elongation(δ5/%) | 12 |
Cr | 0.90-1.20 | Reduction in Area (ψ/%) | 45 |
Mo | 0.15-0.25 | Impact (J) | 63 |
P | ≤0.035 | Hardness | ≤217HB |
S | ≤0.035 | ||
Cu | ≤0.30 | ||
Ni | ≤0.30 | ||
2.Product Application Areas:
Our products have been used in all kinds of areas, such as aviation,aerospace,navigation,nuclear energy,chemical industry,
electronic information,achine manufacture, petrochemical, automotive,instrument and meter, Communication ,transportation, and medical instruments, etc.
3.Similar steel grade & equivalent steel materials:
USA | Japanese | Gemany | British | France | International | Chinese |
ASTM&AISI&SAE | JIS | EN DIN | EN BS | EN NF | ISO | GB |
4140 | SCM440 | 42CrMo4 1.7225 | 42CrMo4 1.7225 | 42CrMo4 1.7225 | ------ | 42CrMo |
