1.7225/42CrMo4 42CrMo Forged Steel Rod EN Standard SAE4140 Hot Rolled Alloy Steel Round Bar
1.7225/42CrMo4 42CrMo Forged Steel Rod EN Standard SAE4140 Hot Rolled Alloy Steel Round Bar
1. Supply Form of AISI 4140 Steel -ASTM A29/A29M Alloy Structural Steel
![]()
- Round
![]()
- Plate
![]()
- sheet
![]()
- Square
![]()
- Hexagonal
![]()
- Pipe
2. Supply Range of AISI 4140 Alloy Steel / 42CrMo4 steel
AISI 4140 Steel Round Bar: diameter 5mm – 400mm
ASTM 4140 Steel Plate: thickness 5 –500mm x width 200– 2300mm
SAE 4140 Steel Block: 210mm x 500-810mm
3. Chemical Composition of AISI 4140 Steel Material / 42CrMo4 steel
| 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 |
4. AISI 4140 alloy Steel Equivalent and Related Speciation / 42CrMo4 steel
| 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 |
5. ASTM AISI 4140 Steel Material Mechanical Properties
Hardness, Rockwell C: 22 HRC, Density: 7.85kg/m3
Tensile strength: 655 MPa .
Melting point: 1416°C
Thermal expansion: 12.2 µm/m°C (20-100 ºC)
Elastic modulus: 190-210 GPa (at 25 ºC ).
6. Forging of AISI 4140 Oil and Gas industry Steel material metal
Forging of 4140 steel should be carried out between 2200 and 1650 º F (1200 and 900 º C). The lower the finishing temperature from forging, the finer will be the grain size. This alloy steel should ideally not be forged below 1650 º F (900 º C) and should be slow cooled after forging in Oil or water.
7. Heat Treatment of SAE/AISI 4140 Alloy Steel / 42CrMo4 steel
- 4140 Steel Annealing
Slowly heat to 800～8500 ºC, keep enough time, ensure heat thoroughly. then cooling in furnace to 480 ºC, then cool in air. After annealing, the hardness 92 HBS Max.
- AISI 4140 Steel Hardening & Quenching
4140 Steel is usually used at 18-22 HRc, If needs, AISI 4140 alloy steel can be hardened or Quenching by cold work. Quenching medium: oil
- Tempering Of AISI 4140 Alloy Steel
/ ℃ tempering temperature: 205 ~ 649°C.
After tempering hardness HRC: 18-25 HRc.
8. Application of AISI 4140 Alloy Steel / 42CrMo4 steel
AISI 4140 alloy steel used for Structural products. As below:
Oil and gas sector, like collets, connection rods, conveyor pins, stem assemblies, gears, Bearings
9. Quality Assured of AISI 4140 Alloy Steel / 42CrMo4 steel
Quality assured by Our ISO 9001:2008 quality management system. Our all AISI 4140 steel all had by SEP 1921-84 ultrasonic inspection (UT Test). Quality Grade: E/e, D/d, C/c.
FAQ
Q1: Are you a manufacturer or merely a trader?
A1: We are not only a stockist of Hot rolled products but also a manufacturer of forged products with our own Forging Mill
Q2: What do you do to control the quality?
A2: Before loading, our products will all be inspected by ultrasonic inspection. Quality Grade conforms to SEP 1921-84 E/e, D/d, C/c as per the customer's request.
Q3:: What are your hot-selling products?
A3: S50C, 1.2311, D2/1.2379, H13/1.2344, CR12MOV, DC53, CR8 4140 4130 4340 8620 , abundant stock for both plates and rounds. Competitive prices and short lead-time.
Q4: Can we visit your company and factory?
A4: Yes, warmly welcome! We will book the hotel and assign our driver to pick you up at the airport when you visit.
Get in Touch
Have questions about our products or want to discuss a custom order? Our team is ready to help you.