Easy-to-Weld 4130 Alloy Steel Round Tubes

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System of Measurement

Shape

Wall Thickness

Length

Hardness Rating

Outside Width

Fabrication

Yield Strength

40,000 psi to 99,999 psi

Outside Height

Tolerance Rating

Inside Width

Hardness

Certificate Type

Material Certificate with Traceable Lot Number

Appearance

Specifications Met

Outside Corner Shape

Maximum Hardness After Heat Treatment

Rockwell C49

Military Specification

MIL-T-6736

Export Control Classification Number (ECCN)

9A991

EAR99

REACH

Not Compliant

RoHS

Compliant with Exemptions

DFARS Specialty Metals

Elongation

141 Products

About Carbon Steel, Alloy Steel, Spring Steel, and Cast Iron

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.

0.028" Wall Thick. (-0.004" to 0.004" Tolerance)
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.
1/4"	-0.005" to 0.005"	0.194"	70,000 psi	Rockwell C20	Rockwell C49	MIL-T-6736, SAE AMS-T-6736, SAE AMS6360	0.030" per 3 ft.	000000000	00000	000000	000000
3/8"	-0.005" to 0.005"	0.319"	70,000 psi	Rockwell C20	Rockwell C49	MIL-T-6736, SAE AMS-T-6736, SAE AMS6360	0.030" per 3 ft.	000000000	0000	00000	00000
1/2"	-0.005" to 0.005"	0.444"	70,000 psi	Rockwell C20	Rockwell C49	MIL-T-6736, SAE AMS-T-6736, SAE AMS6360	0.030" per 3 ft.	000000000	0000	00000	00000
5/8"	-0.005" to 0.005"	0.569"	70,000 psi	Rockwell C20	Rockwell C49	MIL-T-6736, SAE AMS-T-6736, SAE AMS6360	0.030" per 3 ft.	000000000	0000	00000	00000
3/4"	-0.005" to 0.005"	0.694"	70,000 psi	Rockwell C20	Rockwell C49	MIL-T-6736, SAE AMS-T-6736, SAE AMS6360	0.030" per 3 ft.	000000000	0000	00000	00000
1"	-0.005" to 0.005"	0.944"	70,000 psi	Rockwell C20	Rockwell C49	MIL-T-6736, SAE AMS-T-6736, SAE AMS6360	0.030" per 3 ft.	000000000	00000	00000	00000
0.035" Wall Thick. (-0.005" to 0.005" Tolerance)
3/16"	-0.005" to 0.005"	0.118"	70,000 psi	Rockwell C20	Rockwell C49	MIL-T-6736, SAE AMS-T-6736, SAE AMS6360	0.030" per 3 ft.	000000000	0000	00000	00000
1/4"	-0.005" to 0.005"	0.18"	70,000 psi	Rockwell C20	Rockwell C49	MIL-T-6736, SAE AMS-T-6736, SAE AMS6360	0.030" per 3 ft.	000000000	0000	00000	00000
5/16"	-0.005" to 0.005"	0.243"	70,000 psi	Rockwell C20	Rockwell C49	MIL-T-6736, SAE AMS-T-6736, SAE AMS6360	0.030" per 3 ft.	000000000	0000	00000	00000
3/8"	-0.005" to 0.005"	0.305"	70,000 psi	Rockwell C20	Rockwell C49	MIL-T-6736, SAE AMS-T-6736, SAE AMS6360	0.030" per 3 ft.	000000000	0000	00000	00000
1/2"	-0.005" to 0.005"	0.43"	70,000 psi	Rockwell C20	Rockwell C49	MIL-T-6736, SAE AMS-T-6736, SAE AMS6360	0.030" per 3 ft.	000000000	0000	00000	00000
5/8"	-0.005" to 0.005"	0.555"	70,000 psi	Rockwell C20	Rockwell C49	MIL-T-6736, SAE AMS-T-6736, SAE AMS6360	0.030" per 3 ft.	000000000	0000	00000	00000
3/4"	-0.005" to 0.005"	0.68"	70,000 psi	Rockwell C20	Rockwell C49	MIL-T-6736, SAE AMS-T-6736, SAE AMS6360	0.030" per 3 ft.	000000000	0000	00000	00000
7/8"	-0.005" to 0.005"	0.805"	70,000 psi	Rockwell C20	Rockwell C49	MIL-T-6736, SAE AMS-T-6736, SAE AMS6360	0.030" per 3 ft.	000000000	00000	00000	00000
1"	-0.005" to 0.005"	0.93"	70,000 psi	Rockwell C20	Rockwell C49	MIL-T-6736, SAE AMS-T-6736, SAE AMS6360	0.030" per 3 ft.	000000000	00000	00000	00000
1 1/8"	-0.005" to 0.005"	1.055"	70,000 psi	Rockwell C20	Rockwell C49	MIL-T-6736, SAE AMS-T-6736, SAE AMS6360	0.030" per 3 ft.	000000000	00000	00000	00000
1 1/4"	-0.005" to 0.005"	1.18"	70,000 psi	Rockwell C20	Rockwell C49	MIL-T-6736, SAE AMS-T-6736, SAE AMS6360	0.030" per 3 ft.	000000000	00000	00000	00000
1 3/8"	-0.005" to 0.005"	1.305"	70,000 psi	Rockwell C20	Rockwell C49	MIL-T-6736, SAE AMS-T-6736, SAE AMS6360	0.030" per 3 ft.	000000000	00000	00000	00000
1 1/2"	-0.013" to 0.013"	1.43"	70,000 psi	Rockwell C20	Rockwell C49	MIL-T-6736, SAE AMS-T-6736, SAE AMS6360	0.030" per 3 ft.	000000000	00000	00000	00000
0.049" Wall Thick. (-0.007" to 0.007" Tolerance)
1/4"	-0.005" to 0.005"	0.152"	70,000 psi	Rockwell C20	Rockwell C49	MIL-T-6736, SAE AMS-T-6736, SAE AMS6360	0.030" per 3 ft.	000000000	0000	00000	00000
5/16"	-0.005" to 0.005"	0.215"	70,000 psi	Rockwell C20	Rockwell C49	MIL-T-6736, SAE AMS-T-6736, SAE AMS6360	0.030" per 3 ft.	000000000	0000	00000	00000
3/8"	-0.005" to 0.005"	0.277"	70,000 psi	Rockwell C20	Rockwell C49	MIL-T-6736, SAE AMS-T-6736, SAE AMS6360	0.030" per 3 ft.	000000000	0000	00000	00000
7/16"	-0.005" to 0.005"	0.34"	70,000 psi	Rockwell C20	Rockwell C49	MIL-T-6736, SAE AMS-T-6736, SAE AMS6360	0.030" per 3 ft.	000000000	0000	00000	00000
1/2"	-0.005" to 0.005"	0.402"	70,000 psi	Rockwell C20	Rockwell C49	MIL-T-6736, SAE AMS-T-6736, SAE AMS6360	0.030" per 3 ft.	000000000	0000	00000	00000
5/8"	-0.005" to 0.005"	0.527"	70,000 psi	Rockwell C20	Rockwell C49	MIL-T-6736, SAE AMS-T-6736, SAE AMS6360	0.030" per 3 ft.	000000000	0000	00000	00000
3/4"	-0.005" to 0.005"	0.652"	70,000 psi	Rockwell C20	Rockwell C49	MIL-T-6736, SAE AMS-T-6736, SAE AMS6360	0.030" per 3 ft.	000000000	0000	00000	00000
7/8"	-0.005" to 0.005"	0.777"	70,000 psi	Rockwell C20	Rockwell C49	MIL-T-6736, SAE AMS-T-6736, SAE AMS6360	0.030" per 3 ft.	000000000	00000	00000	00000
1"	-0.005" to 0.005"	0.902"	70,000 psi	Rockwell C20	Rockwell C49	MIL-T-6736, SAE AMS-T-6736, SAE AMS6360	0.030" per 3 ft.	000000000	00000	00000	00000
1 1/8"	-0.005" to 0.005"	1.027"	70,000 psi	Rockwell C20	Rockwell C49	MIL-T-6736, SAE AMS-T-6736, SAE AMS6360	0.030" per 3 ft.	000000000	00000	00000	00000
1 1/4"	-0.005" to 0.005"	1.152"	70,000 psi	Rockwell C20	Rockwell C49	MIL-T-6736, SAE AMS-T-6736, SAE AMS6360	0.030" per 3 ft.	000000000	00000	00000	00000
1 3/8"	-0.005" to 0.005"	1.277"	70,000 psi	Rockwell C20	Rockwell C49	MIL-T-6736, SAE AMS-T-6736, SAE AMS6360	0.030" per 3 ft.	000000000	00000	00000	00000
1 1/2"	-0.005" to 0.005"	1.402"	70,000 psi	Rockwell C20	Rockwell C49	MIL-T-6736, SAE AMS-T-6736, SAE AMS6360	0.030" per 3 ft.	000000000	00000	00000	00000
1 3/4"	-0.019" to 0.019"	1.652"	70,000 psi	Rockwell C20	Rockwell C49	MIL-T-6736, SAE AMS-T-6736, SAE AMS6360	0.030" per 3 ft.	000000000	00000	00000	000000
2"	-0.020" to 0.020"	1.902"	70,000 psi	Rockwell C20	Rockwell C49	MIL-T-6736, SAE AMS-T-6736, SAE AMS6360	0.030" per 3 ft.	000000000	00000	00000	000000
0.058" Wall Thick. (-0.009" to 0.009" Tolerance)
3/8"	-0.005" to 0.005"	0.259"	70,000 psi	Rockwell C20	Rockwell C49	MIL-T-6736, SAE AMS-T-6736, SAE AMS6360	0.030" per 3 ft.	000000000	0000	00000	00000
7/16"	-0.005" to 0.005"	0.322"	70,000 psi	Rockwell C20	Rockwell C49	MIL-T-6736, SAE AMS-T-6736, SAE AMS6360	0.030" per 3 ft.	000000000	00000	00000	00000
1/2"	-0.005" to 0.005"	0.384"	70,000 psi	Rockwell C20	Rockwell C49	MIL-T-6736, SAE AMS-T-6736, SAE AMS6360	0.030" per 3 ft.	000000000	00000	00000	00000
5/8"	-0.005" to 0.005"	0.509"	70,000 psi	Rockwell C20	Rockwell C49	MIL-T-6736, SAE AMS-T-6736, SAE AMS6360	0.030" per 3 ft.	000000000	00000	00000	00000
3/4"	-0.005" to 0.005"	0.634"	70,000 psi	Rockwell C20	Rockwell C49	MIL-T-6736, SAE AMS-T-6736, SAE AMS6360	0.030" per 3 ft.	000000000	00000	00000	00000
7/8"	-0.005" to 0.005"	0.759"	70,000 psi	Rockwell C20	Rockwell C49	MIL-T-6736, SAE AMS-T-6736, SAE AMS6360	0.030" per 3 ft.	000000000	00000	00000	00000
1"	-0.005" to 0.005"	0.884"	70,000 psi	Rockwell C20	Rockwell C49	MIL-T-6736, SAE AMS-T-6736, SAE AMS6360	0.030" per 3 ft.	000000000	00000	00000	00000
1 1/8"	-0.005" to 0.005"	1.009"	70,000 psi	Rockwell C20	Rockwell C49	MIL-T-6736, SAE AMS-T-6736, SAE AMS6360	0.030" per 3 ft.	000000000	00000	00000	00000
1 1/4"	-0.005" to 0.005"	1.134"	70,000 psi	Rockwell C20	Rockwell C49	MIL-T-6736, SAE AMS-T-6736, SAE AMS6360	0.030" per 3 ft.	000000000	00000	00000	00000
1 3/8"	-0.005" to 0.005"	1.259"	70,000 psi	Rockwell C20	Rockwell C49	MIL-T-6736, SAE AMS-T-6736, SAE AMS6360	0.030" per 3 ft.	000000000	00000	00000	00000
1 1/2"	-0.005" to 0.005"	1.384"	70,000 psi	Rockwell C20	Rockwell C49	MIL-T-6736, SAE AMS-T-6736, SAE AMS6360	0.030" per 3 ft.	000000000	00000	00000	00000
1 3/4"	-0.010" to 0.010"	1.634"	70,000 psi	Rockwell C20	Rockwell C49	MIL-T-6736, SAE AMS-T-6736, SAE AMS6360	0.030" per 3 ft.	000000000	00000	00000	00000
0.065" Wall Thick. (-0.01" to 0.01" Tolerance)
1/4"	-0.005" to 0.005"	0.12"	70,000 psi	Rockwell C20	Rockwell C49	MIL-T-6736, SAE AMS-T-6736, SAE AMS6360	0.030" per 3 ft.	000000000	0000	00000	00000
5/16"	-0.005" to 0.005"	0.183"	70,000 psi	Rockwell C20	Rockwell C49	MIL-T-6736, SAE AMS-T-6736, SAE AMS6360	0.030" per 3 ft.	000000000	0000	00000	00000
3/8"	-0.005" to 0.005"	0.245"	70,000 psi	Rockwell C20	Rockwell C49	MIL-T-6736, SAE AMS-T-6736, SAE AMS6360	0.030" per 3 ft.	000000000	0000	00000	00000
7/16"	-0.005" to 0.005"	0.308"	70,000 psi	Rockwell C20	Rockwell C49	MIL-T-6736, SAE AMS-T-6736, SAE AMS6360	0.030" per 3 ft.	000000000	0000	00000	00000
1/2"	-0.005" to 0.005"	0.37"	70,000 psi	Rockwell C20	Rockwell C49	MIL-T-6736, SAE AMS-T-6736, SAE AMS6360	0.030" per 3 ft.	000000000	00000	00000	00000
9/16"	-0.005" to 0.005"	0.433"	70,000 psi	Rockwell C20	Rockwell C49	MIL-T-6736, SAE AMS-T-6736, SAE AMS6360	0.030" per 3 ft.	000000000	00000	00000	00000
5/8"	-0.005" to 0.005"	0.495"	70,000 psi	Rockwell C20	Rockwell C49	MIL-T-6736, SAE AMS-T-6736, SAE AMS6360	0.030" per 3 ft.	000000000	00000	00000	00000
3/4"	-0.005" to 0.005"	0.62"	70,000 psi	Rockwell C20	Rockwell C49	MIL-T-6736, SAE AMS-T-6736, SAE AMS6360	0.030" per 3 ft.	000000000	00000	00000	00000
7/8"	-0.005" to 0.005"	0.745"	70,000 psi	Rockwell C20	Rockwell C49	MIL-T-6736, SAE AMS-T-6736, SAE AMS6360	0.030" per 3 ft.	000000000	00000	00000	00000
1"	-0.005" to 0.005"	0.87"	70,000 psi	Rockwell C20	Rockwell C49	MIL-T-6736, SAE AMS-T-6736, SAE AMS6360	0.030" per 3 ft.	000000000	00000	00000	00000
1 1/8"	-0.005" to 0.005"	0.995"	70,000 psi	Rockwell C20	Rockwell C49	MIL-T-6736, SAE AMS-T-6736, SAE AMS6360	0.030" per 3 ft.	000000000	00000	00000	00000
1 1/4"	-0.005" to 0.005"	1.12"	70,000 psi	Rockwell C20	Rockwell C49	MIL-T-6736, SAE AMS-T-6736, SAE AMS6360	0.030" per 3 ft.	000000000	00000	00000	00000
1 3/8"	-0.005" to 0.005"	1.245"	70,000 psi	Rockwell C20	Rockwell C49	MIL-T-6736, SAE AMS-T-6736, SAE AMS6360	0.030" per 3 ft.	000000000	00000	00000	00000
1 1/2"	-0.005" to 0.005"	1.37"	70,000 psi	Rockwell C20	Rockwell C49	MIL-T-6736, SAE AMS-T-6736, SAE AMS6360	0.030" per 3 ft.	000000000	00000	00000	00000
1 5/8"	-0.010" to 0.010"	1.495"	70,000 psi	Rockwell C20	Rockwell C49	MIL-T-6736, SAE AMS-T-6736, SAE AMS6360	0.030" per 3 ft.	000000000	00000	00000	00000
1 3/4"	-0.010" to 0.010"	1.62"	70,000 psi	Rockwell C20	Rockwell C49	MIL-T-6736, SAE AMS-T-6736, SAE AMS6360	0.030" per 3 ft.	000000000	00000	00000	00000
2"	-0.010" to 0.010"	1.87"	70,000 psi	Rockwell C20	Rockwell C49	MIL-T-6736, SAE AMS-T-6736, SAE AMS6360	0.030" per 3 ft.	000000000	00000	00000	000000
0.083" Wall Thick. (-0.012" to 0.012" Tolerance)
3/8"	-0.005" to 0.005"	0.209"	70,000 psi	Rockwell C20	Rockwell C49	MIL-T-6736, SAE AMS-T-6736, SAE AMS6360	0.030" per 3 ft.	000000000	00000	00000	00000
7/16"	-0.005" to 0.005"	0.272"	70,000 psi	Rockwell C20	Rockwell C49	MIL-T-6736, SAE AMS-T-6736, SAE AMS6360	0.030" per 3 ft.	000000000	00000	00000	00000
1/2"	-0.005" to 0.005"	0.334"	70,000 psi	Rockwell C20	Rockwell C49	MIL-T-6736, SAE AMS-T-6736, SAE AMS6360	0.030" per 3 ft.	000000000	00000	00000	00000
9/16"	-0.005" to 0.005"	0.397"	70,000 psi	Rockwell C20	Rockwell C49	MIL-T-6736, SAE AMS-T-6736, SAE AMS6360	0.030" per 3 ft.	000000000	00000	00000	00000
5/8"	-0.005" to 0.005"	0.459"	70,000 psi	Rockwell C20	Rockwell C49	MIL-T-6736, SAE AMS-T-6736, SAE AMS6360	0.030" per 3 ft.	000000000	00000	00000	00000
3/4"	-0.005" to 0.005"	0.584"	70,000 psi	Rockwell C20	Rockwell C49	MIL-T-6736, SAE AMS-T-6736, SAE AMS6360	0.030" per 3 ft.	000000000	00000	00000	00000
7/8"	-0.005" to 0.005"	0.709"	70,000 psi	Rockwell C20	Rockwell C49	MIL-T-6736, SAE AMS-T-6736, SAE AMS6360	0.030" per 3 ft.	000000000	00000	00000	00000
1"	-0.005" to 0.005"	0.834"	70,000 psi	Rockwell C20	Rockwell C49	MIL-T-6736, SAE AMS-T-6736, SAE AMS6360	0.030" per 3 ft.	000000000	00000	00000	00000
1 1/8"	-0.005" to 0.005"	0.959"	70,000 psi	Rockwell C20	Rockwell C49	MIL-T-6736, SAE AMS-T-6736, SAE AMS6360	0.030" per 3 ft.	000000000	00000	00000	00000
1 1/4"	-0.005" to 0.005"	1.084"	70,000 psi	Rockwell C20	Rockwell C49	MIL-T-6736, SAE AMS-T-6736, SAE AMS6360	0.030" per 3 ft.	000000000	00000	00000	00000
1 3/8"	-0.005" to 0.005"	1.209"	70,000 psi	Rockwell C20	Rockwell C49	MIL-T-6736, SAE AMS-T-6736, SAE AMS6360	0.030" per 3 ft.	000000000	00000	00000	00000
1 1/2"	-0.005" to 0.005"	1.334"	70,000 psi	Rockwell C20	Rockwell C49	MIL-T-6736, SAE AMS-T-6736, SAE AMS6360	0.030" per 3 ft.	000000000	00000	00000	00000
1 5/8"	-0.010" to 0.010"	1.459"	70,000 psi	Rockwell C20	Rockwell C49	MIL-T-6736, SAE AMS-T-6736, SAE AMS6360	0.030" per 3 ft.	000000000	00000	00000	000000
1 3/4"	-0.010" to 0.010"	1.584"	70,000 psi	Rockwell C20	Rockwell C49	MIL-T-6736, SAE AMS-T-6736, SAE AMS6360	0.030" per 3 ft.	000000000	00000	00000	000000
2"	-0.010" to 0.010"	1.834"	70,000 psi	Rockwell C20	Rockwell C49	MIL-T-6736, SAE AMS-T-6736, SAE AMS6360	0.030" per 3 ft.	000000000	00000	00000	000000
0.095" Wall Thick. (-0.014" to 0.014" Tolerance)
5/16"	-0.005" to 0.005"	0.123"	70,000 psi	Rockwell C20	Rockwell C49	MIL-T-6736, SAE AMS-T-6736, SAE AMS6360	0.030" per 3 ft.	000000000	00000	00000	00000
7/16"	-0.005" to 0.005"	0.248"	70,000 psi	Rockwell C20	Rockwell C49	MIL-T-6736, SAE AMS-T-6736, SAE AMS6360	0.030" per 3 ft.	000000000	00000	00000	00000
1/2"	-0.005" to 0.005"	0.31"	70,000 psi	Rockwell C20	Rockwell C49	MIL-T-6736, SAE AMS-T-6736, SAE AMS6360	0.030" per 3 ft.	000000000	00000	00000	00000
3/4"	-0.005" to 0.005"	0.56"	70,000 psi	Rockwell C20	Rockwell C49	MIL-T-6736, SAE AMS-T-6736, SAE AMS6360	0.030" per 3 ft.	000000000	00000	00000	00000
1"	-0.005" to 0.005"	0.81"	70,000 psi	Rockwell C20	Rockwell C49	MIL-T-6736, SAE AMS-T-6736, SAE AMS6360	0.030" per 3 ft.	000000000	00000	00000	00000
1 1/8"	-0.005" to 0.005"	0.935"	70,000 psi	Rockwell C20	Rockwell C49	MIL-T-6736, SAE AMS-T-6736, SAE AMS6360	0.030" per 3 ft.	000000000	00000	00000	00000
1 1/4"	-0.005" to 0.005"	1.06"	70,000 psi	Rockwell C20	Rockwell C49	MIL-T-6736, SAE AMS-T-6736, SAE AMS6360	0.030" per 3 ft.	000000000	00000	00000	000000
1 3/8"	-0.005" to 0.005"	1.185"	70,000 psi	Rockwell C20	Rockwell C49	MIL-T-6736, SAE AMS-T-6736, SAE AMS6360	0.030" per 3 ft.	000000000	00000	00000	000000
1 1/2"	-0.010" to 0.010"	1.31"	70,000 psi	Rockwell C20	Rockwell C49	MIL-T-6736, SAE AMS-T-6736, SAE AMS6360	0.030" per 3 ft.	000000000	00000	00000	000000
1 5/8"	-0.010" to 0.010"	1.435"	70,000 psi	Rockwell C20	Rockwell C49	MIL-T-6736, SAE AMS-T-6736, SAE AMS6360	0.030" per 3 ft.	000000000	00000	00000	000000
1 3/4"	-0.010" to 0.010"	1.56"	70,000 psi	Rockwell C20	Rockwell C49	MIL-T-6736, SAE AMS-T-6736, SAE AMS6360	0.030" per 3 ft.	000000000	00000	00000	000000
2"	-0.010" to 0.010"	1.81"	70,000 psi	Rockwell C20	Rockwell C49	MIL-T-6736, SAE AMS-T-6736, SAE AMS6360	0.030" per 3 ft.	000000000	00000	00000	000000
2 1/2"	-0.010" to 0.010"	2.31"	70,000 psi	Rockwell C20	Rockwell C49	MIL-T-6736, SAE AMS-T-6736, SAE AMS6360	0.030" per 3 ft.	000000000	00000	00000	000000
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	00000	00000	00000
7/16"	-0.005" to 0.005"	0.198"	70,000 psi	Rockwell C20	Rockwell C49	MIL-T-6736, SAE AMS-T-6736, SAE AMS6360	0.030" per 3 ft.	000000000	00000	00000	00000
1/2"	-0.005" to 0.005"	0.26"	70,000 psi	Rockwell C20	Rockwell C49	MIL-T-6736, SAE AMS-T-6736, SAE AMS6360	0.030" per 3 ft.	000000000	00000	00000	00000
9/16"	-0.005" to 0.005"	0.323"	70,000 psi	Rockwell C20	Rockwell C49	MIL-T-6736, SAE AMS-T-6736, SAE AMS6360	0.030" per 3 ft.	000000000	00000	00000	00000
5/8"	-0.005" to 0.005"	0.385"	70,000 psi	Rockwell C20	Rockwell C49	MIL-T-6736, SAE AMS-T-6736, SAE AMS6360	0.030" per 3 ft.	000000000	00000	00000	00000
3/4"	-0.005" to 0.005"	0.51"	70,000 psi	Rockwell C20	Rockwell C49	MIL-T-6736, SAE AMS-T-6736, SAE AMS6360	0.030" per 3 ft.	000000000	00000	00000	00000
7/8"	-0.005" to 0.005"	0.635"	70,000 psi	Rockwell C20	Rockwell C49	MIL-T-6736, SAE AMS-T-6736, SAE AMS6360	0.030" per 3 ft.	000000000	00000	00000	00000
1"	-0.005" to 0.005"	0.76"	70,000 psi	Rockwell C20	Rockwell C49	MIL-T-6736, SAE AMS-T-6736, SAE AMS6360	0.030" per 3 ft.	000000000	00000	00000	00000
1 1/8"	-0.005" to 0.005"	0.885"	70,000 psi	Rockwell C20	Rockwell C49	MIL-T-6736, SAE AMS-T-6736, SAE AMS6360	0.030" per 3 ft.	000000000	00000	00000	000000
1 1/4"	-0.005" to 0.005"	1.01"	70,000 psi	Rockwell C20	Rockwell C49	MIL-T-6736, SAE AMS-T-6736, SAE AMS6360	0.030" per 3 ft.	000000000	00000	00000	000000
1 3/8"	-0.005" to 0.005"	1.135"	70,000 psi	Rockwell C20	Rockwell C49	MIL-T-6736, SAE AMS-T-6736, SAE AMS6360	0.030" per 3 ft.	000000000	00000	00000	000000
1 1/2"	-0.005" to 0.005"	1.26"	70,000 psi	Rockwell C20	Rockwell C49	MIL-T-6736, SAE AMS-T-6736, SAE AMS6360	0.030" per 3 ft.	000000000	00000	00000	000000
1 3/4"	-0.010" to 0.010"	1.51"	70,000 psi	Rockwell C20	Rockwell C49	MIL-T-6736, SAE AMS-T-6736, SAE AMS6360	0.030" per 3 ft.	000000000	00000	00000	000000
2"	-0.010" to 0.010"	1.76"	70,000 psi	Rockwell C20	Rockwell C49	MIL-T-6736, SAE AMS-T-6736, SAE AMS6360	0.030" per 3 ft.	000000000	00000	00000	000000
2 1/4"	-0.010" to 0.010"	2.01"	70,000 psi	Rockwell C20	Rockwell C49	MIL-T-6736, SAE AMS-T-6736, SAE AMS6360	0.030" per 3 ft.	000000000	00000	00000	000000
2 1/2"	-0.010" to 0.010"	2.26"	70,000 psi	Rockwell C20	Rockwell C49	MIL-T-6736, SAE AMS-T-6736, SAE AMS6360	0.030" per 3 ft.	000000000	00000	000000	000000
3"	-0.010" to 0.010"	2.76"	70,000 psi	Rockwell C20	Rockwell C49	MIL-T-6736, SAE AMS-T-6736, SAE AMS6360	0.030" per 3 ft.	000000000	000000	000000	000000
0.156" Wall Thick. (-0.023" to 0.023" Tolerance)
5/8"	-0.005" to 0.005"	0.313"	70,000 psi	Rockwell C20	Rockwell C49	MIL-T-6736, SAE AMS-T-6736, SAE AMS6360	0.030" per 3 ft.	000000000	00000	00000	000000
0.188" Wall Thick. (-0.028" to 0.028" Tolerance)
5/8"	-0.005" to 0.005"	0.249"	70,000 psi	Rockwell C20	Rockwell C49	MIL-T-6736, SAE AMS-T-6736, SAE AMS6360	0.030" per 3 ft.	000000000	00000	00000	00000
3/4"	-0.005" to 0.005"	0.374"	70,000 psi	Rockwell C20	Rockwell C49	MIL-T-6736, SAE AMS-T-6736, SAE AMS6360	0.030" per 3 ft.	000000000	00000	00000	00000
1"	-0.005" to 0.005"	0.624"	70,000 psi	Rockwell C20	Rockwell C49	MIL-T-6736, SAE AMS-T-6736, SAE AMS6360	0.030" per 3 ft.	000000000	00000	00000	000000
1 1/8"	-0.005" to 0.005"	0.749"	70,000 psi	Rockwell C20	Rockwell C49	MIL-T-6736, SAE AMS-T-6736, SAE AMS6360	0.030" per 3 ft.	000000000	00000	00000	000000
1 1/4"	-0.005" to 0.005"	0.874"	70,000 psi	Rockwell C20	Rockwell C49	MIL-T-6736, SAE AMS-T-6736, SAE AMS6360	0.030" per 3 ft.	000000000	00000	00000	000000
1 1/2"	-0.005" to 0.005"	1.124"	70,000 psi	Rockwell C20	Rockwell C49	MIL-T-6736, SAE AMS-T-6736, SAE AMS6360	0.030" per 3 ft.	000000000	00000	00000	000000
2"	-0.010" to 0.010"	1.624"	70,000 psi	Rockwell C20	Rockwell C49	MIL-T-6736, SAE AMS-T-6736, SAE AMS6360	0.030" per 3 ft.	000000000	00000	000000	000000
2 1/2"	-0.010" to 0.010"	2.124"	70,000 psi	Rockwell C20	Rockwell C49	MIL-T-6736, SAE AMS-T-6736, SAE AMS6360	0.030" per 3 ft.	000000000	00000	000000	000000
1/4" Wall Thick. (-0.038" to 0.038" Tolerance)
1"	-0.005" to 0.005"	1/2"	70,000 psi	Rockwell C20	Rockwell C49	MIL-T-6736, SAE AMS-T-6736, SAE AMS6360	0.030" per 3 ft.	000000000	00000	00000	000000
3"	-0.010" to 0.010"	2 1/2"	70,000 psi	Rockwell C20	Rockwell C49	MIL-T-6736, SAE AMS-T-6736, SAE AMS6360	0.030" per 3 ft.	000000000	00000	000000	000000

								6" Lg.
OD	OD Tolerance	ID	ID Tolerance	Yield Strength	Hardness	Maximum Hardness After Heat Treatment	Specifications Met		Each
1/4" Wall Thick. (-0.038" to 0.038" Tolerance)
1"	-0.005" to 0.005"	1/2"	Not Rated	70,000 psi	Rockwell C20	Rockwell C49	MIL-T-6736, SAE AMS-T-6736	0000000	000000
1 1/2"	-0.005" to 0.005"	1"	Not Rated	70,000 psi	Rockwell C20	Rockwell C49	MIL-T-6736, SAE AMS-T-6736	0000000	00000
2"	-0.005" to 0.005"	1 1/2"	Not Rated	70,000 psi	Rockwell C20	Rockwell C49	MIL-T-6736, SAE AMS-T-6736	0000000	00000

Easy-to-Weld 4130 Alloy Steel Rectangular Tubes

Yield Strength: 75,000 psi
Hardness: Rockwell C20 (Hard)
Heat Treatable: Yes
Max. Hardness After Heat Treatment: Rockwell C49
Fabrication: Seamless
Specifications Met: MIL-T-6736, SAE AMS-T-6736

Made from 4130 alloy steel, also known as chrome-moly steel, these tubes have low carbon content for good weldability. They’re often used for building frames and supports, since their flat sides make them easier to bolt than round tubes. To increase their wear resistance, you can harden them with heat treating. These tubes have been manufactured to SAE and military 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.

Outside		Inside
Ht.	Wd.	Ht.	Wd.		1/2 ft. Lg.	1 ft. Lg.	2 ft. Lg.	3 ft. Lg.	6 ft. Lg.
0.035" Wall Thick.
3/8"	3/8"	0.305"	0.305"	0000000	000000	000000	000000	000000	000000
1/2"	1/2"	0.43"	0.43"	0000000	00000	00000	00000	00000	00000
1/2"	1"	0.43"	0.93"	0000000	00000	00000	00000	00000	00000
5/8"	5/8"	0.555"	0.555"	0000000	00000	00000	00000	00000	00000
3/4"	3/4"	0.68"	0.68"	0000000	00000	00000	00000	00000	000000
1"	1"	0.93"	0.93"	0000000	00000	00000	00000	00000	000000
0.049" Wall Thick.
1/2"	1"	0.402"	0.902"	0000000	00000	00000	00000	00000	00000
5/8"	5/8"	0.527"	0.527"	0000000	00000	00000	00000	00000	00000
3/4"	3/4"	0.652"	0.652"	0000000	00000	00000	00000	00000	00000
3/4"	1 1/2"	0.652"	1.402"	0000000	00000	00000	00000	00000	000000
1"	1"	0.902"	0.902"	0000000	00000	00000	00000	00000	000000
1"	1 1/2"	0.902"	1.402"	0000000	00000	00000	00000	00000	000000
0.065" Wall Thick.
1/2"	1"	0.37"	0.87"	0000000	00000	00000	00000	00000	000000
5/8"	5/8"	0.495"	0.495"	0000000	00000	00000	00000	00000	000000
3/4"	3/4"	0.62"	0.62"	0000000	00000	00000	00000	00000	000000
1"	1"	0.87"	0.87"	0000000	00000	00000	00000	00000	000000
1"	1 1/2"	0.87"	1.37"	0000000	00000	00000	00000	000000	000000
1"	1 3/4"	0.87"	1.62"	0000000	00000	00000	00000	000000	000000
1"	2"	0.87"	1.87"	0000000	00000	00000	00000	000000	000000