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About Steel
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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.
Multipurpose 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.
Stress-Relieved Heat Treatment—Tubes that are stress relieved minimize warping during machining.
Seamless—Seamless tubes are stronger than welded tubes.
Heat Treatable—Heat treatable tubes can be surface hardened.
OD | ID | Fabrication | Heat Treatment | Heat Treatable | Yield Strength, psi | Hardness | Specs. Met | 1" Long | 3" Long | 1/2 ft. Long | 1 ft. Long | 3 ft. Long | 6 ft. Long | |||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
1/2" Thick Wall | ||||||||||||||||
| 1 1/2" | 1/2" | Seamless | — | No | 65,000 | Rockwell B86 (Medium) | ASTM A519 | 7767T58 | — | — | 000000 | 000000 | 0000000 | 0000000 | ||
3/4" Thick Wall | ||||||||||||||||
| 2 1/2" | 1" | Seamless | — | No | 70,000 | Rockwell B85 (Medium) | ASTM A519 | 6045N56 | — | — | 00000 | 000000 | 000000 | — | ||
| 3" | 1 1/2" | Seamless | — | No | 70,000 | Rockwell B85 (Medium) | ASTM A519 | 6045N57 | — | — | 00000 | 000000 | 000000 | — | ||
| 3 1/4" | 1 3/4" | Seamless | — | Yes | 65,000 | Rockwell B80 (Medium) | ASTM A519 | 7767T797 | — | — | — | 000000 | 000000 | — | ||
| 3 1/2" | 2" | Seamless | — | No | 70,000 | Rockwell B85 (Medium) | ASTM A519 | 6045N36 | 000000 | 000000 | 00000 | 000000 | — | — | ||
| 3 3/4" | 2 1/4" | Seamless | — | Yes | 65,000 | Rockwell B80 (Medium) | ASTM A519 | 7767T798 | — | — | 00000 | 000000 | — | — | ||
| 3 3/4" | 2 1/4" | Seamless | Stress Relieved | Yes | 65,000 | Rockwell B80 (Medium) | ASTM A519 | 7767T528 | — | 00000 | — | — | — | — | ||
| 3 3/4" | 2 1/4" | Seamless | Stress Relieved | Yes | 65,000 | Rockwell B80 (Medium) | ASTM A519 | 7767T527 | 00000 | — | — | — | — | — | ||
| 4" | 2 1/2" | Seamless | — | No | 70,000 | Rockwell B85 (Medium) | ASTM A519 | 6045N58 | — | — | 000000 | 000000 | — | — | ||
| 4" | 2 1/2" | Seamless | — | No | 70,000 | Rockwell B85 (Medium) | ASTM A519 | 6045N746 | — | 00000 | — | — | — | — | ||
| 4" | 2 1/2" | Seamless | — | No | 70,000 | Rockwell B85 (Medium) | ASTM A519 | 6045N745 | 00000 | — | — | — | — | — | ||
| 4 1/2" | 3" | Seamless | — | No | 70,000 | Rockwell B85 (Medium) | ASTM A519 | 6045N37 | 00000 | 00000 | 000000 | 000000 | — | — | ||
| 5" | 3 1/2" | Seamless | — | No | 70,000 | Rockwell B85 (Medium) | ASTM A519 | 6045N38 | 00000 | 00000 | 000000 | 000000 | — | — | ||
| 6" | 4 1/2" | Seamless | — | Yes | 65,000 | Rockwell B80 (Medium) | ASTM A519 | 7767T799 | — | — | 000000 | 000000 | — | — | ||
| 6" | 4 1/2" | Seamless | — | Yes | 65,000 | Rockwell B80 (Medium) | ASTM A519 | 7767T539 | — | 00000 | — | — | — | — | ||
| 6" | 4 1/2" | Seamless | — | Yes | 65,000 | Rockwell B80 (Medium) | ASTM A519 | 7767T538 | 00000 | — | — | — | — | — | ||
1" Thick Wall | ||||||||||||||||
| 3" | 1" | Seamless | — | Yes | 65,000 | Rockwell B80 (Medium) | ASTM A519 | 7767T817 | — | — | 00000 | 000000 | — | — | ||
| 3" | 1" | Seamless | — | Yes | 65,000 | Rockwell B80 (Medium) | ASTM A519 | 7767T557 | — | 00000 | — | — | — | — | ||
| 3" | 1" | Seamless | — | Yes | 65,000 | Rockwell B80 (Medium) | ASTM A519 | 7767T549 | 00000 | — | — | — | — | — | ||
| 4" | 2" | Seamless | — | No | 70,000 | Rockwell B85 (Medium) | ASTM A519 | 6045N59 | — | — | 000000 | 000000 | — | — | ||
| 4" | 2" | Seamless | — | No | 70,000 | Rockwell B85 (Medium) | ASTM A519 | 6045N751 | — | 00000 | — | — | — | — | ||
| 4" | 2" | Seamless | — | No | 70,000 | Rockwell B85 (Medium) | ASTM A519 | 6045N749 | 00000 | — | — | — | — | — | ||
| 4 1/2" | 2 1/2" | Seamless | — | No | 70,000 | Rockwell B85 (Medium) | ASTM A519 | 6045N39 | 00000 | 00000 | 000000 | 000000 | — | — | ||
| 5" | 3" | Seamless | — | Yes | 65,000 | Rockwell B80 (Medium) | ASTM A519 | 7767T818 | — | — | 000000 | 000000 | — | — | ||
| 5" | 3" | Seamless | — | Yes | 65,000 | Rockwell B80 (Medium) | ASTM A519 | 7767T568 | — | 00000 | — | — | — | — | ||
| 5" | 3" | Seamless | — | Yes | 65,000 | Rockwell B80 (Medium) | ASTM A519 | 7767T567 | 00000 | — | — | — | — | — | ||
| 5 1/2" | 3 1/2" | Seamless | — | Yes | 65,000 | Rockwell B80 (Medium) | ASTM A519 | 7767T819 | — | — | 000000 | 000000 | — | — | ||
| 5 1/2" | 3 1/2" | Seamless | — | Yes | 65,000 | Rockwell B80 (Medium) | ASTM A519 | 7767T579 | — | 00000 | — | — | — | — | ||
| 5 1/2" | 3 1/2" | Seamless | — | Yes | 65,000 | Rockwell B80 (Medium) | ASTM A519 | 7767T578 | 00000 | — | — | — | — | — | ||
| 6" | 4" | Seamless | — | Yes | 65,000 | Rockwell B80 (Medium) | ASTM A519 | 7767T827 | — | — | 000000 | 000000 | — | — | ||
| 6" | 4" | Seamless | — | Yes | 65,000 | Rockwell B80 (Medium) | ASTM A519 | 7767T597 | — | 00000 | — | — | — | — | ||
| 6" | 4" | Seamless | — | Yes | 65,000 | Rockwell B80 (Medium) | ASTM A519 | 7767T589 | 00000 | — | — | — | — | — | ||
| 7" | 5" | Seamless | — | Yes | 65,000 | Rockwell B80 (Medium) | ASTM A519 | 7767T828 | — | — | 000000 | 000000 | — | — | ||
| 7" | 5" | Seamless | — | Yes | 65,000 | Rockwell B80 (Medium) | ASTM A519 | 7767T618 | — | 00000 | — | — | — | — | ||
| 7" | 5" | Seamless | — | Yes | 65,000 | Rockwell B80 (Medium) | ASTM A519 | 7767T617 | 00000 | — | — | — | — | — | ||
| 8" | 6" | Seamless | — | Yes | 35,000 | Rockwell B60 (Medium) | ASTM A519 | 7767T739 | — | — | 000000 | 000000 | — | — | ||
| 8" | 6" | Seamless | — | Yes | 35,000 | Rockwell B60 (Medium) | ASTM A519 | 7767T428 | — | 00000 | — | — | — | — | ||
| 8" | 6" | Seamless | — | Yes | 35,000 | Rockwell B60 (Medium) | ASTM A519 | 7767T427 | 00000 | — | — | — | — | — | ||
| 10" | 8" | Seamless | — | Yes | 35,000 | Rockwell B60 (Medium) | ASTM A519 | 7767T829 | — | — | 000000 | 000000 | — | — | ||
| 10" | 8" | Seamless | — | Yes | 35,000 | Rockwell B60 (Medium) | ASTM A519 | 7767T629 | — | 000000 | — | — | — | — | ||
| 10" | 8" | Seamless | — | Yes | 35,000 | Rockwell B60 (Medium) | ASTM A519 | 7767T628 | 00000 | — | — | — | — | — | ||
1 1/2" Thick Wall | ||||||||||||||||
| 6" | 3" | Seamless | — | Yes | 35,000 | Rockwell B60 (Medium) | ASTM A519 | 7767T837 | — | — | 000000 | 000000 | — | — | ||
| 6" | 3" | Seamless | — | Yes | 35,000 | Rockwell B60 (Medium) | ASTM A519 | 7767T647 | — | 000000 | — | — | — | — | ||
| 6" | 3" | Seamless | — | Yes | 35,000 | Rockwell B60 (Medium) | ASTM A519 | 7767T639 | 00000 | — | — | — | — | — | ||
| 8" | 5" | Seamless | — | Yes | 35,000 | Rockwell B60 (Medium) | ASTM A519 | 7767T838 | — | — | 000000 | 000000 | — | — | ||
| 8" | 5" | Seamless | — | Yes | 35,000 | Rockwell B60 (Medium) | ASTM A519 | 7767T658 | — | 000000 | — | — | — | — | ||
| 8" | 5" | Seamless | — | Yes | 35,000 | Rockwell B60 (Medium) | ASTM A519 | 7767T657 | 00000 | — | — | — | — | — | ||
2" Thick Wall | ||||||||||||||||
| 8" | 4" | Seamless | — | Yes | 35,000 | Rockwell B60 (Medium) | ASTM A519 | 7767T839 | — | — | 000000 | 000000 | — | — | ||
| 8" | 4" | Seamless | — | Yes | 35,000 | Rockwell B60 (Medium) | ASTM A519 | 7767T669 | — | 000000 | — | — | — | — | ||
| 8" | 4" | Seamless | — | Yes | 35,000 | Rockwell B60 (Medium) | ASTM A519 | 7767T668 | 00000 | — | — | — | — | — | ||
| 10" | 6" | Seamless | — | Yes | 35,000 | Rockwell B60 (Medium) | ASTM A519 | 7767T847 | — | — | 000000 | 000000 | — | — | ||
| 10" | 6" | Seamless | — | Yes | 35,000 | Rockwell B60 (Medium) | ASTM A519 | 7767T687 | — | 000000 | — | — | — | — | ||
| 10" | 6" | Seamless | — | Yes | 35,000 | Rockwell B60 (Medium) | ASTM A519 | 7767T679 | 00000 | — | — | — | — | — | ||
| 12" | 8" | Seamless | — | Yes | 35,000 | Rockwell B60 (Medium) | ASTM A519 | 7767T848 | — | — | 000000 | 000000 | — | — | ||
| 12" | 8" | Seamless | — | Yes | 35,000 | Rockwell B60 (Medium) | ASTM A519 | 7767T698 | — | 000000 | — | — | — | — | ||
| 12" | 8" | Seamless | — | Yes | 35,000 | Rockwell B60 (Medium) | ASTM A519 | 7767T697 | 00000 | — | — | — | — | — | ||
3" Thick Wall | ||||||||||||||||
| 10" | 4" | Seamless | — | Yes | 35,000 | Rockwell B60 (Medium) | ASTM A519 | 7767T849 | — | — | 000000 | 000000 | — | — | ||
| 10" | 4" | Seamless | — | Yes | 35,000 | Rockwell B60 (Medium) | ASTM A519 | 7767T719 | — | 000000 | — | — | — | — | ||
| 10" | 4" | Seamless | — | Yes | 35,000 | Rockwell B60 (Medium) | ASTM A519 | 7767T718 | 000000 | — | — | — | — | — | ||
Multipurpose 4140 Alloy Steel Round Tubes
|
Also known as chrome-moly steel, these alloy steel tubes resist fracturing from repeated stress. They’re used for a wide range of parts, including cylinders, rollers, and frames. For added wear resistance, they can be surface hardened with heat treating.
Note: Tubes may be made from either 4140 or 4142 alloy steel. They are interchangeable in most applications.
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Certificates with a traceable lot number are available for these products. Download certificates from ORDER HISTORY after your order ships.
OD | ID | Fabrication | Heat Treatment | Heat Treatable | Yield Strength, psi | Hardness | Max. Hardness After Heat Treatment | Specs. Met | 3" Long | 1/2 ft. Long | 1 ft. Long | 3 ft. Long | 4 ft. Long | 6 ft. Long | 8 ft. Long | |||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
1/2" Thick Wall | ||||||||||||||||||
| 2 1/2" | 1 1/2" | Seamless | Annealed | Yes | 60,000 | Rockwell B85 (Medium) | Rockwell C60 | ASTM A519 | 6920T11 | 000000 | 000000 | 000000 | 0000000 | 0000000 | 0000000 | 0000000 | ||
| 2 3/4" | 1 3/4" | Seamless | Annealed | Yes | 60,000 | Rockwell B85 (Medium) | Rockwell C60 | ASTM A519 | 6920T12 | 00000 | 00000 | 000000 | 000000 | — | 000000 | — | ||
| 3" | 2" | Seamless | Annealed | Yes | 60,000 | Rockwell B85 (Medium) | Rockwell C60 | ASTM A519 | 6920T13 | 00000 | 00000 | 000000 | 000000 | — | 000000 | — | ||
| 3 1/4" | 2 1/4" | Seamless | Annealed | Yes | 60,000 | Rockwell B85 (Medium) | Rockwell C60 | ASTM A519 | 6920T21 | — | 00000 | 000000 | 000000 | — | 000000 | — | ||
| 3 3/4" | 2 3/4" | Seamless | Annealed | Yes | 60,000 | Rockwell B85 (Medium) | Rockwell C60 | ASTM A519 | 6920T23 | 00000 | 00000 | 000000 | 000000 | — | 000000 | — | ||
| 4" | 3" | Seamless | Annealed | Yes | 60,000 | Rockwell B85 (Medium) | Rockwell C60 | ASTM A519 | 6920T31 | — | 00000 | 000000 | 000000 | — | 000000 | — | ||
| 5" | 4" | Seamless | Annealed | Yes | 60,000 | Rockwell B85 (Medium) | Rockwell C60 | ASTM A519 | 6920T51 | — | 00000 | 000000 | 000000 | — | — | — | ||
5/8" Thick Wall | ||||||||||||||||||
| 3 1/4" | 2" | Seamless | Annealed | Yes | 60,000 | Rockwell B85 (Medium) | Rockwell C60 | ASTM A519 | 6920T22 | — | — | 000000 | 000000 | — | 000000 | — | ||
| 4" | 2 3/4" | Seamless | Annealed | Yes | 60,000 | Rockwell B85 (Medium) | Rockwell C60 | ASTM A519 | 6920T32 | — | 00000 | 000000 | 000000 | — | 000000 | — | ||
3/4" Thick Wall | ||||||||||||||||||
| 3" | 1 1/2" | Seamless | Annealed | Yes | 60,000 | Rockwell B85 (Medium) | Rockwell C60 | ASTM A519 | 6920T24 | 00000 | 00000 | 000000 | 000000 | — | 000000 | — | ||
| 3 1/4" | 1 3/4" | Seamless | Annealed | Yes | 60,000 | Rockwell B85 (Medium) | Rockwell C60 | ASTM A519 | 6920T25 | — | — | 000000 | 000000 | — | 000000 | — | ||
| 3 1/2" | 2" | Seamless | Annealed | Yes | 60,000 | Rockwell B85 (Medium) | Rockwell C60 | ASTM A519 | 6920T711 | — | 000000 | 000000 | 000000 | — | — | — | ||
| 3 3/4" | 2 1/4" | Seamless | Annealed | Yes | 60,000 | Rockwell B85 (Medium) | Rockwell C60 | ASTM A519 | 6920T26 | — | 000000 | 000000 | 000000 | — | 000000 | — | ||
| 4" | 2 1/2" | Seamless | Annealed | Yes | 60,000 | Rockwell B85 (Medium) | Rockwell C60 | ASTM A519 | 6920T712 | — | 000000 | 000000 | 000000 | — | — | — | ||
| 4 1/4" | 2 3/4" | Seamless | Annealed | Yes | 60,000 | Rockwell B85 (Medium) | Rockwell C60 | ASTM A519 | 6920T27 | — | 000000 | 000000 | 000000 | — | 000000 | — | ||
| 4 1/2" | 3" | Seamless | Annealed | Yes | 60,000 | Rockwell B85 (Medium) | Rockwell C60 | ASTM A519 | 6920T713 | — | 000000 | 000000 | 000000 | — | — | — | ||
| 4 3/4" | 3 1/4" | Seamless | Annealed | Yes | 60,000 | Rockwell B85 (Medium) | Rockwell C60 | ASTM A519 | 6920T28 | 00000 | 000000 | 000000 | 000000 | — | 000000 | — | ||
| 5" | 3 1/2" | Seamless | Annealed | Yes | 60,000 | Rockwell B85 (Medium) | Rockwell C60 | ASTM A519 | 6920T714 | — | 000000 | 000000 | 000000 | — | — | — | ||
| 6" | 4 1/2" | Seamless | Annealed | Yes | 60,000 | Rockwell B85 (Medium) | Rockwell C60 | ASTM A519 | 6920T715 | — | 000000 | 000000 | 000000 | — | — | — | ||
1" Thick Wall | ||||||||||||||||||
| 3 1/2" | 1 1/2" | Seamless | Annealed | Yes | 60,000 | Rockwell B85 (Medium) | Rockwell C60 | ASTM A519 | 6920T29 | 00000 | 00000 | 000000 | 000000 | — | 000000 | — | ||
| 4" | 2" | Seamless | Annealed | Yes | 60,000 | Rockwell B85 (Medium) | Rockwell C60 | ASTM A519 | 6920T716 | — | 000000 | 000000 | 000000 | — | — | — | ||
| 4 1/2" | 2 1/2" | Seamless | Annealed | Yes | 60,000 | Rockwell B85 (Medium) | Rockwell C60 | ASTM A519 | 6920T717 | — | 000000 | 000000 | 000000 | — | — | — | ||
| 5" | 3" | Seamless | Annealed | Yes | 60,000 | Rockwell B85 (Medium) | Rockwell C60 | ASTM A519 | 6920T718 | — | 000000 | 000000 | 000000 | — | — | — | ||
| 5 1/2" | 3 1/2" | Seamless | Annealed | Yes | 60,000 | Rockwell B85 (Medium) | Rockwell C60 | ASTM A519 | 6920T719 | — | 000000 | 000000 | 000000 | — | — | — | ||
| 6" | 4" | Seamless | Annealed | Yes | 60,000 | Rockwell B85 (Medium) | Rockwell C60 | ASTM A519 | 6920T721 | — | 000000 | 000000 | 000000 | — | — | — | ||
| 6 1/2" | 4 1/2" | Seamless | Annealed | Yes | 60,000 | Rockwell B85 (Medium) | Rockwell C60 | ASTM A519 | 6920T722 | — | 000000 | 000000 | 000000 | — | — | — | ||
| 7" | 5" | Seamless | Annealed | Yes | 60,000 | Rockwell B85 (Medium) | Rockwell C60 | ASTM A519 | 6920T723 | — | 000000 | 000000 | 000000 | — | — | — | ||
| 8" | 6" | Seamless | Annealed | Yes | 60,000 | Rockwell B85 (Medium) | Rockwell C60 | ASTM A519 | 6920T724 | — | 000000 | 000000 | 000000 | — | — | — | ||
1 1/4" Thick Wall | ||||||||||||||||||
| 4 1/2" | 2" | Seamless | Annealed | Yes | 60,000 | Rockwell B85 (Medium) | Rockwell C60 | ASTM A519 | 6920T33 | — | 000000 | 000000 | 000000 | — | 00000000 | — | ||
| 5" | 2 1/2" | Seamless | Annealed | Yes | 60,000 | Rockwell B85 (Medium) | Rockwell C60 | ASTM A519 | 6920T34 | — | 000000 | 000000 | 000000 | — | 00000000 | — | ||
| 5 1/2" | 3" | Seamless | Annealed | Yes | 60,000 | Rockwell B85 (Medium) | Rockwell C60 | ASTM A519 | 6920T35 | — | 000000 | 000000 | 000000 | — | 00000000 | — | ||
2" Thick Wall | ||||||||||||||||||
| 6" | 2" | Seamless | Annealed | Yes | 60,000 | Rockwell B85 (Medium) | Rockwell C60 | ASTM A519 | 6920T36 | — | — | 000000 | 00000000 | — | 00000000 | — | ||
| 8" | 4" | Seamless | Annealed | Yes | 60,000 | Rockwell B85 (Medium) | Rockwell C60 | ASTM A519 | 6920T725 | — | 000000 | 000000 | 00000000 | — | — | — | ||
| 10" | 6" | Seamless | Annealed | Yes | 60,000 | Rockwell B85 (Medium) | Rockwell C60 | ASTM A519 | 6920T726 | — | 000000 | 000000 | 00000000 | — | — | — | ||
| 12" | 8" | Seamless | Annealed | Yes | 60,000 | Rockwell B85 (Medium) | Rockwell C60 | ASTM A519 | 6920T727 | — | 000000 | 000000 | 00000000 | — | — | — | ||
