4340 Round Steel Bars,
Steel Grade: Alloy Steel 40CrNiMo/1.6563,
Specification:
Diameter (mm) Length (mm)
Round bars: 12~3000 4000~6000 Hot rolled
280~1000 3000~5800 Forged
Thickness(mm) Width(mm) Length (mm)
Flat bars/Blocks 20~600 50~1000 1000~5800
Delivery condition:
1. EAF+LF+VD, rolled /forged, UT pass
2. Surface: Black surface, turned surface and milling surface according to customer's requirements.
3. Heat treatment such as normalizing or annealing or Q/T can be done according to customer's technical specifications.
4340 Round Steel Bars, Grade: Alloy Steel 40CrNiMo/4340/SCM439/4CrMo4/1.6563| Chemical Composition | | C | Si | Mn | Cr | Mo | P | S | Cu | Ni | | 0.37-0.44 | 0.17-0.37 | 0.50-0.80 | 0.60-0.90 | 0.15-0.25 | ≤0.025 | ≤0.025 | ≤0.30 | ≤0.30 | Mechanical Properties | |
Tensile Strength Rm,MPa | Yield Strength Rel,MPa | Elongation A,% | Reduction Z,% | I mpacting Energy Aku,J | HBW ≤ After Annealing |
| ≥980 | ≥835 | ≥12 | ≥55 | ≥78 | 269 |