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 |
Fatigue-Resistant 4340 Alloy Steel Sheets
- Yield Strength: Not Rated
- Hardness: Not Rated
- Heat Treatable: Yes
- Max. Hardness After Heat Treatment: Rockwell C52
- Fabrication: Hot Rolled
- Specifications Met: ASTM A829
Made of 4340 alloy steel, these sheets hold up to high heat, hard impacts, and heavy wear thanks to high levels of nickel, chromium, and molybdenum. They’re often used to make machine tool bases and structural panels. For even more wear resistance, you can harden the surface with heat treating. These sheets are manufactured to ASTM A829 standards for quality and performance.
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.
| Thick. | Thick. Tolerance | Heat Treatment | Flatness Tolerance | Each | |
6" × 6" | |||||
|---|---|---|---|---|---|
| 3/4" | -0.01" to 0.03" | Stress Relieved | 3/8" | 0000000 | 0000000 |
| 1" | -0.01" to 0.06" | Stress Relieved | 3/8" | 0000000 | 000000 |
| 1 1/2" | -0.01" to 0.06" | Stress Relieved | 3/8" | 0000000 | 000000 |
| 2" | -0.01" to 0.09" | Stress Relieved | 3/8" | 0000000 | 000000 |
| 2 1/2" | -0.01" to 0.09" | Stress Relieved | 3/8" | 0000000 | 000000 |
| 3" | -0.01" to 0.11" | Stress Relieved | 3/8" | 0000000 | 000000 |
6" × 12" | |||||
| 3/4" | -0.01" to 0.03" | Stress Relieved | 3/8" | 0000000 | 000000 |
| 1" | -0.01" to 0.06" | Stress Relieved | 3/8" | 0000000 | 000000 |
| 1 1/2" | -0.01" to 0.06" | Stress Relieved | 3/8" | 0000000 | 000000 |
| 2" | -0.01" to 0.09" | Stress Relieved | 3/8" | 0000000 | 000000 |
| 2 1/2" | -0.01" to 0.09" | Stress Relieved | 3/8" | 0000000 | 000000 |
| 3" | -0.01" to 0.11" | Stress Relieved | 3/8" | 0000000 | 000000 |
12" × 12" | |||||
| 3/4" | -0.01" to 0.03" | Stress Relieved | 3/8" | 0000000 | 000000 |
| 1" | -0.01" to 0.06" | Stress Relieved | 3/8" | 0000000 | 000000 |
| 1 1/2" | -0.01" to 0.06" | Stress Relieved | 3/8" | 0000000 | 000000 |
| 2" | -0.01" to 0.09" | Stress Relieved | 3/8" | 0000000 | 000000 |
| 2 1/2" | -0.01" to 0.09" | Stress Relieved | 3/8" | 0000000 | 000000 |
| 3" | -0.01" to 0.11" | Stress Relieved | 3/8" | 0000000 | 00000000 |