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Compare over 50 grades of steel and cast iron to find the right material for you—all with material certificates for traceability.
High-Strength 4340 Alloy Steel Rods
- Yield Strength: 68,000 psi
- Hardness: Rockwell C20 (Hard)
- Heat Treatable: Yes
- Max. Hardness After Heat Treatment: Not Rated
Use 4340 alloy steel for power transmission and structural applications that involve extreme impact, heat, and wear.
For technical drawings and 3-D models, click on a part number.
Certificates with a traceable lot number are available for these products. Download certificates from ORDER HISTORY after your order ships.
| Dia. | Dia. Tolerance | Heat Treatment | Specifications Met | Straightness Tolerance | 1/2 ft. Lg. | 1 ft. Lg. | 2 ft. Lg. | 3 ft. Lg. | 6 ft. Lg. | |
| 1/2" | -0.009" to 0.009" | Annealed (Softened) | SAE AMS6415 | 0.050" per ft. | 0000000 | |||||
| 3/4" | -0.009" to 0.009" | Annealed (Softened) | SAE AMS6415 | 0.050" per ft. | 0000000 | |||||
| 7/8" | -0.009" to 0.009" | Annealed (Softened) | SAE AMS6415 | 0.050" per ft. | 0000000 | |||||
| 1" | -0.009" to 0.009" | Annealed (Softened) | SAE AMS6415 | 0.050" per ft. | 0000000 | |||||
| 1 1/8" | -0.016" to 0.016" | Annealed (Softened) | SAE AMS6415 | 0.050" per ft. | 0000000 | |||||
| 1 1/4" | -0.016" to 0.016" | Annealed (Softened) | SAE AMS6415 | 0.050" per ft. | 0000000 | |||||
| 1 1/2" | -0.016" to 0.016" | Annealed (Softened) | SAE AMS6415 | 0.050" per ft. | 0000000 | |||||
| 1 5/8" | -0.016" to 0.016" | Annealed (Softened) | SAE AMS6415 | 0.050" per ft. | 00000000 | |||||
| 1 3/4" | -0.016" to 0.016" | Annealed (Softened) | SAE AMS6415 | 0.050" per ft. | 0000000 | |||||
| 2" | -0.016" to 0.016" | Annealed (Softened) | SAE AMS6415 | 0.050" per ft. | 0000000 | |||||
| 2 1/4" | 0" to 0.047" | Annealed (Softened) | SAE AMS6415 | 0.050" per ft. | 0000000 | |||||
| 2 1/2" | 0" to 0.047" | Annealed (Softened) | SAE AMS6415 | 0.050" per ft. | 0000000 | |||||
| 2 5/8" | 0" to 0.047" | Annealed (Softened) | SAE AMS6415 | 0.050" per ft. | 00000000 | |||||
| 2 3/4" | 0" to 0.047" | Annealed (Softened) | SAE AMS6415 | 0.050" per ft. | 0000000 | |||||
| 3" | 0" to 0.047" | Annealed (Softened) | SAE AMS6415 | 0.050" per ft. | 0000000 | |||||
| 3 1/4" | 0" to 0.047" | Annealed (Softened) | SAE AMS6415 | 0.050" per ft. | 00000000 | |||||
| 3 1/2" | 0" to 0.047" | Annealed (Softened) | SAE AMS6415 | 0.050" per ft. | 00000000 | |||||
| 3 3/4" | 0" to 0.063" | Annealed (Softened) | SAE AMS6415 | 0.050" per ft. | 00000000 | |||||
| 4" | 0" to 0.063" | Annealed (Softened) | SAE AMS6415 | 0.050" per ft. | 00000000 | |||||
| 4 1/4" | 0" to 0.063" | Annealed (Softened) | SAE AMS6415 | 0.050" per ft. | 00000000 | |||||
| 4 1/2" | 0" to 0.063" | Annealed (Softened) | SAE AMS6415 | 0.050" per ft. | 00000000 | |||||
| 4 3/4" | 0" to 0.079" | Annealed (Softened) | SAE AMS6415 | 0.050" per ft. | 00000000 | |||||
| 5" | 0" to 0.079" | Annealed (Softened) | SAE AMS6415 | 0.050" per ft. | 00000000 | |||||
| 6" | 0" to 0.125" | Annealed (Softened) | SAE AMS6415 | 0.050" per ft. | 00000000 |