42CrMo钢属于超高强度钢，具有高强度和韧性，淬透性也较好，无明显的回火脆性，调质处理后有较高的疲劳极限和抗多次冲击能力，低温冲击韧性良好。42CrMo steel is an ultra-high strength steel with high strength and toughness, good hardenability, no obvious tempering brittleness, high fatigue limit and multiple impact resistance after quenching and tempering treatment, and good low-temperature impact toughness.
Worldwide equivalents of 42CrMo steel
|country / region||China||EU||Germany||Japan||France||England||USA|
|country / region||Italy||Spain||Finland||Russia||Inter||Sweden|
Chemical Composition of 42CrMo Steel Material
|0.38 to 0.45||0.17 to 0.37||0.50 to 0.80||≤ 0.030||≤ 0.030||0.90 to 1.20||0.15 to 0.25|
Mechanical Properties of 42CrMo Steel
Yield strength: ≥ 930 MPa
Tensile strength: ≥ 1080 MPa
Rate of reduction in area: ≥45%
Impact absorbing energy: ≥ 63 J
Material Brinell hardness: ≤229 (Annealed or high temperature tempered steel rod)
Sample diameter: 25mm
Physical properties of 42CrMo steel
Critical temperature of 42CrMo steel
Expansion coefficient of 42CrMo steel
Thermal conductivity of 42CrMo steel
|Coefficient of thermal conductivity||210000MPa||185000MPa||175000MPa||165000MPa||15500oMPa|
First quenching heating temperature: 850 ℃(Cooling – oil)
Tempering heating temperature: 560℃ (Cooling – water, oil)
Features and Application:
High strength and hardenability, good toughness, small deformation during quenching, high creep strength and lasting strength at high temperature.
It is used to manufacture forgings with higher strength and larger quenched and tempered section than 35CrMo steel, such as large gear for locomotive traction, supercharger transmission gear, pressure vessel gear, rear axle, connecting rod and spring clamp under heavy load
It can also be used for drill pipe joints and fishing tools in oil deep wells below 2000m, and can be used for molds of bending machines.
|Round Bar||Diameter(mm): 6-800mm ,Length: 1000-9000mm or custom size|
|Plate/Flat/Block||Thickness: 6mm-500mm , Width: 20mm-1000mm or custom size|
|Tolerance||±1%，Thickness: +/-0.02mm, Width:+/-2mm|
42CrMo steel is a kind of Chinese alloy steel. It has high strength and toughness, good hardenability. After quenching and tempering treatment, it has a high fatigue limit and resistance to multiple impacts. And good low-temperature impact toughness.
|42CrMo||0.38 to 0.45||0.17 to 0.37||0.50 to 0.80||≤ 0.030||≤ 0.030||0.90 to 1.20||0.15 to 0.25|
- Yield strength: ≥ 930 MPa
- Tensile strength: ≥ 1080 MPa
- Elongation: ≥12%
- Rate of reduction in area: ≥45%
- Impact absorbing energy: ≥ 63 J
- Material Brinell hardness: ≤229 (Annealed or high temperature tempered steel rod)
- Sample diameter: 25mm
Heat Treatment Specification
- First quenching heating temperature: 850 °C (Cooling – oil)
- Tempering heating temperature: 560 °C (Cooling – water, oil)
Shapes and dimensions
It is making important parts requiring higher strength and larger size of the quenched section than 35CrMo steel.
- For engineering steel.
- Large gears for locomotive traction,
- Supercharger gears,
- Gearbox gears,
- Engine cylinders,
- Oil drill pipe joints,
- Large load rods and
- Spring clips.