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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.
Low-Carbon Steel Round Tubes
Also known as mild steel, low-carbon steel is easy to machine, form, and weld. It's widely fabricated into parts that don’t require high strength, such as frames, supports, and conduit. This steel is manufactured to ASTM, SAE, or EN standards for quality and performance.
Seamless tubes are stronger than welded tubes.
Heat treatable tubes can be surface hardened.
Tubes
| OD | ID | Yield Strength, psi  | Fabrication | Heat Treatable | Hardness | Specifications Met | 1/2 ft. Lg. | 1 ft. Lg. | 3 ft. Lg. | |
3/4" Wall Thick. | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| 3 1/4" | 1 3/4" | 35,000 | Seamless | Yes | Rockwell B60 (Medium) | ASTM A519 | 00000000 | |||
| 3 3/4" | 2 1/4" | 35,000 | Seamless | Yes | Rockwell B60 (Medium) | ASTM A519 | 00000000 | |||
| 6" | 4 1/2" | 35,000 | Seamless | Yes | Rockwell B60 (Medium) | ASTM A519 | 00000000 | |||
1" Wall Thick. | ||||||||||
| 3" | 1" | 35,000 | Seamless | Yes | Rockwell B60 (Medium) | ASTM A519 | 00000000 | |||
| 5" | 3" | 35,000 | Seamless | Yes | Rockwell B60 (Medium) | ASTM A519 | 00000000 | |||
| 5 1/2" | 3 1/2" | 35,000 | Seamless | Yes | Rockwell B60 (Medium) | ASTM A519 | 00000000 | |||
| 6" | 4" | 35,000 | Seamless | Yes | Rockwell B60 (Medium) | ASTM A519 | 00000000 | |||
| 7" | 5" | 35,000 | Seamless | Yes | Rockwell B60 (Medium) | ASTM A519 | 00000000 | |||
| 8" | 6" | 35,000 | Seamless | Yes | Rockwell B60 (Medium) | ASTM A519 | 00000000 | |||
| 10" | 8" | 35,000 | Seamless | Yes | Rockwell B60 (Medium) | ASTM A519 | 00000000 | |||
1 1/2" Wall Thick. | ||||||||||
| 6" | 3" | 35,000 | Seamless | Yes | Rockwell B60 (Medium) | ASTM A519 | 00000000 | |||
| 8" | 5" | 35,000 | Seamless | Yes | Rockwell B60 (Medium) | ASTM A519 | 00000000 | |||
2" Wall Thick. | ||||||||||
| 8" | 4" | 35,000 | Seamless | Yes | Rockwell B60 (Medium) | ASTM A519 | 00000000 | |||
| 10" | 6" | 35,000 | Seamless | Yes | Rockwell B60 (Medium) | ASTM A519 | 00000000 | |||
| 12" | 8" | 35,000 | Seamless | Yes | Rockwell B60 (Medium) | ASTM A519 | 00000000 | |||
3" Wall Thick. | ||||||||||
| 10" | 4" | 35,000 | Seamless | Yes | Rockwell B60 (Medium) | ASTM A519 | 00000000 | |||
| OD | ID | Yield Strength, psi | Fabrication | Heat Treatable | Hardness | Specifications Met | Each | |
1" Lg. | ||||||||
|---|---|---|---|---|---|---|---|---|
3/4" Wall Thick. | ||||||||
| 6" | 4 1/2" | 35,000 | Seamless | Yes | Rockwell B60 (Medium) | ASTM A519 | 00000000 | 000000 |
1" Wall Thick. | ||||||||
| 3" | 1" | 35,000 | Seamless | Yes | Rockwell B60 (Medium) | ASTM A519 | 00000000 | 00000 |
| 5" | 3" | 35,000 | Seamless | Yes | Rockwell B60 (Medium) | ASTM A519 | 00000000 | 00000 |
| 5 1/2" | 3 1/2" | 35,000 | Seamless | Yes | Rockwell B60 (Medium) | ASTM A519 | 00000000 | 00000 |
| 6" | 4" | 35,000 | Seamless | Yes | Rockwell B60 (Medium) | ASTM A519 | 00000000 | 00000 |
| 7" | 5" | 35,000 | Seamless | Yes | Rockwell B60 (Medium) | ASTM A519 | 00000000 | 00000 |
| 8" | 6" | 35,000 | Seamless | Yes | Rockwell B60 (Medium) | ASTM A519 | 00000000 | 00000 |
| 10" | 8" | 35,000 | Seamless | Yes | Rockwell B60 (Medium) | ASTM A519 | 00000000 | 00000 |
1 1/2" Wall Thick. | ||||||||
| 6" | 3" | 35,000 | Seamless | Yes | Rockwell B60 (Medium) | ASTM A519 | 00000000 | 00000 |
| 8" | 5" | 35,000 | Seamless | Yes | Rockwell B60 (Medium) | ASTM A519 | 00000000 | 00000 |
2" Wall Thick. | ||||||||
| 8" | 4" | 35,000 | Seamless | Yes | Rockwell B60 (Medium) | ASTM A519 | 00000000 | 00000 |
| 10" | 6" | 35,000 | Seamless | Yes | Rockwell B60 (Medium) | ASTM A519 | 00000000 | 00000 |
| 12" | 8" | 35,000 | Seamless | Yes | Rockwell B60 (Medium) | ASTM A519 | 00000000 | 00000 |
3" Wall Thick. | ||||||||
| 10" | 4" | 35,000 | Seamless | Yes | Rockwell B60 (Medium) | ASTM A519 | 00000000 | 000000 |
3" Lg. | ||||||||
3/4" Wall Thick. | ||||||||
| 6" | 4 1/2" | 35,000 | Seamless | Yes | Rockwell B60 (Medium) | ASTM A519 | 00000000 | 00000 |
1" Wall Thick. | ||||||||
| 3" | 1" | 35,000 | Seamless | Yes | Rockwell B60 (Medium) | ASTM A519 | 00000000 | 00000 |
| 5" | 3" | 35,000 | Seamless | Yes | Rockwell B60 (Medium) | ASTM A519 | 00000000 | 00000 |
| 5 1/2" | 3 1/2" | 35,000 | Seamless | Yes | Rockwell B60 (Medium) | ASTM A519 | 00000000 | 00000 |
| 6" | 4" | 35,000 | Seamless | Yes | Rockwell B60 (Medium) | ASTM A519 | 00000000 | 00000 |
| 7" | 5" | 35,000 | Seamless | Yes | Rockwell B60 (Medium) | ASTM A519 | 00000000 | 00000 |
| 8" | 6" | 35,000 | Seamless | Yes | Rockwell B60 (Medium) | ASTM A519 | 00000000 | 00000 |
| 10" | 8" | 35,000 | Seamless | Yes | Rockwell B60 (Medium) | ASTM A519 | 00000000 | 000000 |
1 1/2" Wall Thick. | ||||||||
| 6" | 3" | 35,000 | Seamless | Yes | Rockwell B60 (Medium) | ASTM A519 | 00000000 | 000000 |
| 8" | 5" | 35,000 | Seamless | Yes | Rockwell B60 (Medium) | ASTM A519 | 00000000 | 000000 |
2" Wall Thick. | ||||||||
| 8" | 4" | 35,000 | Seamless | Yes | Rockwell B60 (Medium) | ASTM A519 | 00000000 | 000000 |
| 10" | 6" | 35,000 | Seamless | Yes | Rockwell B60 (Medium) | ASTM A519 | 00000000 | 000000 |
| 12" | 8" | 35,000 | Seamless | Yes | Rockwell B60 (Medium) | ASTM A519 | 00000000 | 000000 |
3" Wall Thick. | ||||||||
| 10" | 4" | 35,000 | Seamless | Yes | Rockwell B60 (Medium) | ASTM A519 | 00000000 | 000000 |