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 Rectangular Tubes
Also known as mild steel, low-carbon steel is easy to machine, form, and weld. These tubes are often fabricated into parts that don’t require high strength, such as frames, supports, and raceways. To increase their wear resistance, you can surface harden them with heat treating. These tubes are manufactured to ASTM or EN 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.
- Yield Strength: See table
- Hardness: Not Rated
- Heat Treatable: Yes
- Max. Hardness After Heat Treatment: Not Rated
- Fabrication: Welded
- Specifications Met: See table
- Yield Strength: 34,000 psi
- Hardness: Rockwell B65 (Medium)
- Heat Treatable: Yes
- Max. Hardness After Heat Treatment: Not Rated
- Fabrication: Welded
- Specifications Met: EN 10305-5
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.
Certificates with a traceable lot number are available for these products. Download certificates from ORDER HISTORY after your order ships.
| OD | ID | Yield Strength, psi  | Fabrication | Weld Method | Heat Treatable | Hardness | Specifications Met | 1/2 ft. Lg. | 1 ft. Lg. | 3 ft. Lg. | 6 ft. Lg. | |
0.035" Wall Thick. | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 5/8" | 0.555" | 32,000 | Welded | ERW (Electric Resistance Welded) | Yes | Rockwell B55 (Soft) | ASTM A513 Type 2 | 00000000 | ||||
| 3/4" | 0.68" | 32,000 | Welded | ERW (Electric Resistance Welded) | Yes | Rockwell B55 (Soft) | ASTM A513 Type 2 | 00000000 | ||||
| 7/8" | 0.805" | 32,000 | Welded | ERW (Electric Resistance Welded) | No | Rockwell B55 (Soft) | ASTM A513 Type 2 | 00000000 | ||||
| 1" | 0.93" | 32,000 | Welded | ERW (Electric Resistance Welded) | Yes | Rockwell B55 (Soft) | ASTM A513 Type 2 | 00000000 | ||||
| 2" | 1.93" | 32,000 | Welded | ERW (Electric Resistance Welded) | Yes | Rockwell B55 (Soft) | ASTM A513 Type 2 | 00000000 | ||||
0.049" Wall Thick. | ||||||||||||
| 2 1/2" | 2.402" | 32,000 | Welded | ERW (Electric Resistance Welded) | Yes | Rockwell B55 (Soft) | ASTM A513 Type 2 | 0000000 | ||||
0.065" Wall Thick. | ||||||||||||
| 1 1/8" | 0.995" | 32,000 | Welded | ERW (Electric Resistance Welded) | Yes | Rockwell B55 (Soft) | ASTM A513 Type 2 | 00000000 | ||||
| 1 3/8" | 1.245" | 32,000 | Welded | ERW (Electric Resistance Welded) | Yes | Rockwell B55 (Soft) | ASTM A513 Type 1 | 0000000 | ||||
| 1 3/4" | 1.62" | 32,000 | Welded | ERW (Electric Resistance Welded) | Yes | Rockwell B55 (Soft) | ASTM A513 Type 1 | 0000000 | ||||
| 2 1/4" | 2.12" | 32,000 | Welded | ERW (Electric Resistance Welded) | Yes | Rockwell B55 (Soft) | ASTM A513 Type 1 | 0000000 | ||||
| 2 1/2" | 2.37" | 32,000 | Welded | ERW (Electric Resistance Welded) | Yes | Rockwell B55 (Soft) | ASTM A513 Type 1 | 0000000 | ||||
| 2 3/4" | 2.62" | 32,000 | Welded | ERW (Electric Resistance Welded) | Yes | Rockwell B55 (Soft) | ASTM A513 Type 1 | 0000000 | ||||
| 3 1/4" | 3.12" | 32,000 | Welded | ERW (Electric Resistance Welded) | Yes | Rockwell B55 (Soft) | ASTM A513 Type 1 | 0000000 | ||||
| 5" | 4.87" | 32,000 | Welded | ERW (Electric Resistance Welded) | Yes | Rockwell B55 (Soft) | ASTM A513 Type 1 | 0000000 | ||||
| 6" | 5.87" | 32,000 | Welded | ERW (Electric Resistance Welded) | Yes | Rockwell B55 (Soft) | ASTM A513 Type 1 | 0000000 | ||||
0.083" Wall Thick. | ||||||||||||
| 1 1/2" | 1.334" | 32,000 | Welded | ERW (Electric Resistance Welded) | Yes | Rockwell B55 (Soft) | ASTM A513 Type 1 | 0000000 | ||||
| 3" | 2.834" | 32,000 | Welded | ERW (Electric Resistance Welded) | Yes | Rockwell B55 (Soft) | ASTM A513 Type 1 | 0000000 | ||||
0.095" Wall Thick. | ||||||||||||
| 1 1/4" | 1.06" | 32,000 | Welded | ERW (Electric Resistance Welded) | Yes | Rockwell B55 (Soft) | ASTM A513 Type 1 | 0000000 | ||||
| 1 1/2" | 1.31" | 32,000 | Welded | ERW (Electric Resistance Welded) | Yes | Rockwell B55 (Soft) | ASTM A513 Type 1 | 0000000 | ||||
| 2" | 1.81" | 32,000 | Welded | ERW (Electric Resistance Welded) | Yes | Rockwell B55 (Soft) | ASTM A513 Type 1 | 0000000 | ||||
0.12" Wall Thick. | ||||||||||||
| 1 3/8" | 1.135" | 32,000 | Welded | ERW (Electric Resistance Welded) | Yes | Rockwell B55 (Soft) | ASTM A513 Type 1 | 0000000 | ||||
| 1 5/8" | 1.385" | 32,000 | Welded | ERW (Electric Resistance Welded) | Yes | Rockwell B55 (Soft) | ASTM A513 Type 1 | 0000000 | ||||
1/8" Wall Thick. | ||||||||||||
| 3/4" | 1/2" | 32,000 | Welded | ERW (Electric Resistance Welded) | No | Rockwell B55 (Soft) | ASTM A513 Type 1 | 0000000 | ||||
| 1" | 3/4" | 32,000 | Welded | ERW (Electric Resistance Welded) | No | Rockwell B55 (Soft) | ASTM A513 Type 1 | 00000000 | ||||
| 1 1/4" | 1" | 32,000 | Welded | ERW (Electric Resistance Welded) | No | Rockwell B55 (Soft) | ASTM A513 Type 1 | 0000000 | ||||
| 1 1/2" | 1 1/4" | 32,000 | Welded | ERW (Electric Resistance Welded) | No | Rockwell B55 (Soft) | ASTM A513 Type 1 | 00000000 | ||||
| 1 3/4" | 1 1/2" | 32,000 | Welded | ERW (Electric Resistance Welded) | No | Rockwell B55 (Soft) | ASTM A513 Type 1 | 0000000 | ||||
| 2" | 1 3/4" | 32,000 | Welded | ERW (Electric Resistance Welded) | No | Rockwell B55 (Soft) | ASTM A513 Type 1 | 00000000 | ||||
| 3" | 2 3/4" | 32,000 | Welded | ERW (Electric Resistance Welded) | No | Rockwell B55 (Soft) | ASTM A513 Type 1 | 0000000 | ||||
| 4" | 3 3/4" | 32,000 | Welded | ERW (Electric Resistance Welded) | No | Rockwell B55 (Soft) | ASTM A513 Type 1 | 0000000 | ||||
1/4" Wall Thick. | ||||||||||||
| 8" | 7 1/2" | 32,000 | Welded | ERW (Electric Resistance Welded) | No | Rockwell B55 (Soft) | ASTM A513 Type 1 | 0000000 | ||||
| OD, mm | ID, mm | Yield Strength, psi | Fabrication | Heat Treatable | Hardness | Specifications Met | 1 ft. Lg. | 2 ft. Lg. | 3 ft. Lg. | 4 ft. Lg. | 6 ft. Lg. | 8 ft. Lg. | |
1 mm Wall Thick. | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 12 | 10 | 34,000 | Seamless | No | Brinell 100 (Soft) | EN 10305-1 | 0000000 | ||||||
2 mm Wall Thick. | |||||||||||||
| 12 | 8 | 34,000 | Seamless | No | Brinell 100 (Soft) | EN 10305-1 | 00000000 | ||||||
| 20 | 16 | 34,000 | Seamless | No | Brinell 100 (Soft) | EN 10305-1 | 0000000 | ||||||
3 mm Wall Thick. | |||||||||||||
| 20 | 14 | 34,000 | Seamless | No | Brinell 100 (Soft) | EN 10305-1 | 00000000 | ||||||
| 25 | 19 | 34,000 | Seamless | No | Brinell 100 (Soft) | EN 10305-1 | 0000000 | ||||||
4 mm Wall Thick. | |||||||||||||
| 25 | 17 | 34,000 | Seamless | No | Brinell 100 (Soft) | EN 10305-1 | 00000000 | ||||||
| 30 | 22 | 34,000 | Seamless | No | Brinell 100 (Soft) | EN 10305-1 | 0000000 | ||||||