ASTM 42CrMo4 alloy steel round bar with heat-treatment services to improve steel microstructure and mechanical properties.
Application: machine construction, base plates, axes, gear shafts, gear wheels
Surface condition: black, polished, rough machined, turned, painted, oil or grease covered
Chemical composition: C: 0.38 ~0.45; Si: ≤0.40; Mn：0.60～0.90; S: ≤0.035; P: ≤0.035; Cr：0.90～1.20; Mo: 0.15～0.30
Stock sizes: φ30, φ35, φ40, φ45, φ50, φ60, φ65, φ70, φ90, φ100, φ110, φ130, φ120, φ140 mm
Equivalent grades:
| Standard | Grade |
| GB | 42CrMo |
| AISI | 4140, 4142 |
| ГOCT | 38XM |
| BS | 708M40, 708A42, 709M40 |
| NF | 40CD4, 42CD4 |
| DIN | 41CrMo4, 42CrMo4, 1.7225 |
| JIS | SCM4 |
| ISO | 683, 1 3 |
| SAE | 4140H, 4140RH |
Mechanical composition:
Tensile strength: min 1080 MPa
Yield strength : min 930 MPa
Elongation rate: min 12%
Reduction rate: min 45%
Impact energy: akv min 63J
Hardness: 32HRC ~52 HRC
Melting point: 1416 ℃
Formula reference:
Round bar weight KG = 3.14 x length x radius² x 0.00000785
Round pipe weight KG= 3.14 x length x (OD²-ID²) x 0.00000785
Plate weight KG= length x width x thickness x 0.00000785
(All lengths are mm)
We provide heat-treatment, cold thread, lab services according to customer’s technical requirements. Please send properties requriements to infor@aylttg.com. We will give positive response within one working day.
