Description
Technical Parameters
4340 Alloy Rod
Alloy Steel 4340 Products Description
4340 round metal stock has good fatigue strength and is also resistant to brittleness due to the material's excellent ductility.
4340 round metal rod is frequently used in engineering applications due to its strength and NMenability. At the same time, 4340 alloy round bar has good machinability and excellent ductility and toughness at a wide range of strength levels and elevated temperatures.
In addition, 4340 alloy steel round bar can be used in deep NMening structural steel applications, especially for the production of highly stressed components.
4340 Alloy Rod Products Details
Standard "4340 Grade" Chemical Composition
| Carbon | 0.38-0.43 |
| Manganese | 0.60-0.80 |
| Phosphorus (max) | 0.035 |
| Sulfur (max) | 0.040 |
| Silicon | 0.15-0.35 |
| Nickel | 1.65-2.00 |
| Chromium | 0.70-0.90 |
| Molybdenum | 0.20-0.30 |
Estimated Mechanical Property Ranges for "Grade 4340"
| Tensile strength (psi) | 105,000 - 115,000 |
| Yield strength (psi) | 75,000 - 85,000 |
| Elongation in 2" (%) | 20 - 30 |
| Reduction of area (%) | 35 - 45 |
| Brinell Hardness (BHN) | 210 - 240 |
Alloy Steel Round Bar 4340 Products Image
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