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42Crmo4 Alloy Steel Plate ASTM AISI 4140 High Strength Steel Plate DIN1.7225 SCM440 Alloy
AISI 4140 Alloy steel material stockholders and suppliers from China-MITTEL STEEL . we have more 16 years experience in 4140 steel plate, round bar, flat bar, square supply.AISI 4140 alloy steel is chromium, molybdenum, manganese containing low alloy steel. It has high fatigue strength, abrasion and impact resistance, toughness, and torsional strength. The following datasheet gives an overview of AISI 4140 alloy steel.
4140 alloy steel material is a high quality Quenched and Tempered Alloy Structural steel, It belong to the high quality medium carbon alloy steel, Oil Quenched & Tempered Hardenss is 28-34 HRC.4140 Annealing delivery hardenss less than 250HB.
Related Specifications ASTM A29/A29M DIN EN 10083/3 JIS G4053 GB GB/T 3077
Mechanical Properties of 4140 alloy steel
| Properties | Metric | Imperial |
| 1. Tensile strength | 655 MPa | 95000 psi |
| 2. Yield strength | 415 MPa | 60200 psi |
| 3. Bulk modulus (typical for steel) | 140 GPa | 20300 ksi |
| 4. Shear modulus (typical for steel) | 80 GPa | 11600 ksi |
| 5. Elastic modulus | 190-210 GPa | 27557-30458 ksi |
| 6. Poisson’s ratio | 0.27-0.30 | 0.27-0.30 |
| 7. Elongation at break (in 50 mm) | 25.70% | 25.70% |
| 8. Hardness, Brinell | 197 | 197 |
| 9. Hardness, Knoop (converted from Brinell hardness) | 219 | 219 |
| 10. Hardness, Rockwell B (converted from Brinell hardness) | 92 | |
| 11. Hardness, Rockwell C (converted from Brinell hardness. Value below normal HRC range, for comparison purposes only) | 13 | 13 |
| 12. Hardness, Vickers (converted from Brinell hardness) | 207 | 207 |
| 13. Machinability (based on AISI 1212 as 100 machinability) | 65 | 65 |
AISI 4140 alloy steel Chemical composition
| ASTM A29/29M | C | Si | Mn | Cr | Mo | P | S |
| 4140 | 0.38～0.43 | 0.15～0.35 | 0.75～1.00 | 0.80～1.10 | 0.15～0.25 | ≤0.035 | ≤0.040 |
| DIN WN-r | C | Si | Mn | Cr | Mo | P | S |
| 1.7225 | 0.38～0.45 | ≤0.40 | 0.60～0.90 | 0.90～1.20 | 0.15～0.30 | ≤0.035 | ≤0.035 |
| GB/T | C | Si | Mn | Cr | Mo | P | S |
| 42CrMo | 0.38～0.45 | 0.17～0.37 | 0.50～0.80 | 0.90～1.20 | 0.15～0.25 | ≤0.030 | ≤0.030 |
| BS | C | Si | Mn | Cr | Mo | P | S |
| 708M40 | 0.36～0.44 | 0.10～0.35 | 0.70～1.00 | 0.90～1.20 | 0.15～0.25 | ≤0.035 | ≤0.035 |
| JIS | C | Si | Mn | Cr | Mo | P | S |
| SCM440 | 0.38～0.43 | 0.15～0.35 | 0.60～0.85 | 0.90～1.20 | 0.15～0.30 | ≤0.030 | ≤0.030 |
Packing: Customized or Loose packing
Delivery Time: 30-60 days after payment
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