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Easy-to-Weld 4130 Alloy Steel Round Tubes

- Yield Strength: See table
- Hardness: See table
- Heat Treatable: Yes
- Max. Hardness After Heat Treatment: See table
- Specifications Met: See table
4130 alloy steel has a low carbon content that provides good weldability. It's often used for gears, fasteners, and structural applications. These tubes meet military specifications and SAE dimensional standards.
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.
OD | OD Tolerance | ID | Yield Strength | Hardness | Maximum Hardness After Heat Treatment | Specifications Met | Straightness Tolerance | 1 ft. Lg. | 3 ft. Lg. | 6 ft. Lg. | |
0.12" Wall Thick. (-0.018" to 0.018" Tolerance) | |||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|
3/8" | -0.005" to 0.005" | 0.135" | 70,000 psi | Rockwell C20 | Rockwell C49 | MIL-T-6736, SAE AMS-T-6736, SAE AMS6360 | 0.030" per 3 ft. | 000000000 |
Peel-Away Layered Ring Shims

These shims are made of layers of metal bonded with adhesive. Remove layers with a utility knife until you get the thickness you need. To make the layers easier to pull apart, gently heat the shim to soften the adhesive. These shims fit around fasteners and shafts to precisely align, level, and adjust spacing.
Aluminum and brass are softer than stainless steel, so they can be used as wear plates between components that rub together, preventing damage to equipment. Brass is more corrosion resistant than aluminum.
For technical drawings and 3-D models, click on a part number.
ID | ID Tolerance | OD | OD Tolerance | No. of Layers | Layer Thick. | Layer Thick. Tolerance | Min. Hardness | Magnetic Properties | Each | |
0.032" Thick (-0.005" to 0.005" Tolerance) | ||||||||||
---|---|---|---|---|---|---|---|---|---|---|
0.135" | -0.01" to 0.01" | 0.234" | -0.01" to 0.01" | 16 | 0.002" | -0.0003" to 0.0003" | Not Rated | Nonmagnetic | 000000000 | 00000 |