42CrMo Steel Round Bar Sheet Plate Material
42CrMo Steel Material is high strength steel. It has great toughness, strength and hardenability. After quenching and tempering treatment, it will get better fatigue limit and shock resistance ability. It usually is used without obvious temper embrittlement after the quenching and tempering treatment. And its low-temperature impact toughness is good. So 42CrMo steel material round bar or sheet was widely used in the big or medium type plastic mold with certain strength and toughness. The properties of 42CrMo are close to the 35CrMo. But the content of carbon and chromium are higher than 35CrMo, so the strength and hardenability are better than 35CrMo material.
| 42CrMo Steel Round Bar Sheet Plate Supply Range | |||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Type | Specification | Surface | |||||||||||||||||
| Round Bar | Diameter: 6-800mm; Length: 1000-9000mm; Can be customized | Black Surface/Bright Surface /Grinded/Peeled/Turned | |||||||||||||||||
| Sheet/Plate/Slab | Thickness: 6-500mm; width: 20-1000mm or can be customized; Length: Can be customized | Black Surface/Bright Surface /Grinded/Peeled/Turned | |||||||||||||||||
GB 42CrMo Steel Grade Equivalent Chart
| Country | CHINA | USA | Germany | France | UK | JAPAN | ISO | |
|---|---|---|---|---|---|---|---|---|
| Standard | GB | ASTM/AISI | DIN EN/DIN | W-Nr. | NF EN/NF | BS EN/BS | JIS | ISO |
| Grades | 42CrMo | 4140/4142/A193 B7 | 42CrMo4 | 1.7225 | 42CD4 | 708M40/CFS11 | SCM440/SCM440H | 42CrMo4 |
42CrMo Steel Chemical Composition
| Stand | C(%) | Si(%) | Mn(%) | P(%) | S(%) | Cr(%) | Mo(%) |
|---|---|---|---|---|---|---|---|
| 42CrMo | 0.38-0.45 | 0.17-0.37 | 0.50-0.80 | ≤ 0.030 | ≤ 0.030 | 0.90-1.20 | 0.15-0.25 |
42CrMo Steel Physical Properties
| Critical Temperature | ||||||
|---|---|---|---|---|---|---|
| Critical Point | Ac1 | Ac3 | Ms | - | - | - |
| Temperature/℃ | 730 | 800 | 310 | - | - | - |
| Expansion Coefficient | ||||||
| Temperature/℃ | 20~100 | 20~200 | 20~300 | 20~400 | 20~500 | 20~600 |
| Expansion Coefficient/℃-1 | 11.1×10K | 12.1×10K | 12.9×10K | 13.5×10K | 13.9×10K | 14.1×10K |
| Thermal Conductivity | ||||||
| Temperature/℃ | 200 | 300 | 400 | 500 | 600 | - |
| Coefficient of thermal conductivity | 210000MPa | 185000MPa | 175000MPa | 165000MPa | 15500oMPa | - |
42CrMo Steel Mechanical Properties
- Tensile Strength: no less than 1080 MPa
- Yield Strength: no less than 930 MPa
- Elongation: no less than 12%
- Rate of Reduction of Area: 45%
- Impact Absorbing Energy: no less than 63 J
Hot Sale Products
42CrMo Steel Material Application
What is 42CrMo steel material used for?
Compare with the 35CrMo, 42CrMo is a better option. Due to its great properties, people usually use 42CrMo steel round bar or plate to make the important fittings those with higher strength and bigger cross-section size than 35CrMo. Such as the shaft, gear, connection rod, spring, engine cylinder, 1200-2000mm petroleum drill attaches, and etc.
GB 42CrMo Steel Heat Treatment
Annealing
Annealing in 760±10℃, furnace cooling to 400℃ then air cooling.
Normalizing
Normalizing in 760±10℃, air cooling after out of the furnace.
Notes About Quenching and Tempering Treatment
Must pay attention to the temperature of liquid coolant. And must make sure there are no oil contamination or other impurities. Otherwise, the hardness of steel will be not enough or out of the balance.
Quenching and tempering for billet steel material without processing, then it will get non-uniform hardness. So processing of forging or grinding is necessary before the Q+T.
Our Advantage
Manufacturing
With 7000 tons of hydraulic forging press, electric slag furnace and other high-end production equipment, we produce a great variety of steels with the best quality in China.
Testing
In order to control the quality, we have complete testing methods to make sure satisfy the customer needs, including Chemical Analysis, Ultrasonic Test and so on.
Massive Stock
We keep a mass stock are over 20000 tons for various steel type, including steel round bar, steel sheet, alloy steel, carbon steel, stainless steel, mold steel, steel coil and etc.
Customized Service
With a professional steel engineers team, we provide customized service according to your project drawing, also provide professional project experience for your special project, such as materials, processing conditions and etc.
World Wide Delivery
For container shipment, standard packing and bundle round bar and flat bar would be applied. It is necessary to fasten & reinforcement would be done to ensure the safety and better unloading at the destination port.
For less than container shipment, wooden box package would be applied for different size materials. For milled or grounded materials, the anti-rust oil would be needed to ensure the surface condition, within the wooden box.
