Specifications
Mechanical Properties
| Ultimate Tensile Strength | 140,000 |
| Yield Strength | 90,000 |
| Brinell Hardness | 300 |
| Elongation | 20% in 2 |
| Machinability and Weldability 4142 has a machinability rating at 63% of B1112. Average cutting speed 95 ft/min. 4142 Prehard is not recommended for welding. It is best suited for welding in the annealed state, with preheating prior to welding and stress relieving after the welding operation. |
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| Tolerances 4142 has a machinability rating at 63% of B1112. Average cutting speed 95 ft/min. 4142 Prehard is not recommended for welding. It is best suited for welding in the annealed state, with preheating prior to welding and stress relieving after the welding operation. |
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Technical Specifications
| ASTM A-193 Grade B7 |
Chemistry
| C | 0.4-0.45 |
| Mn | 0.75-1 |
| Si | 0.205-0.35 |
| Mo | 0.15-0.25 |
| P | 0.4 |
| S | 0.04 |