42CrMo High Speed Forged Steel Rolls EN Standard Hot Roller Forging Hollow 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
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.
