4130 Alloy Steel Round Tubes

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Shape

Wall Thickness

Length

Hardness Rating

Outside Width

Fabrication

Yield Strength

40,000 psi to 99,999 psi

System of Measurement

Outside Height

Tolerance Rating

Inside Width

Specifications Met

Certificate Type

Material Certificate with Traceable Lot Number

Hardness

Appearance

Outside Corner Shape

Military Specification

MIL-T-6736

Maximum Hardness After Heat Treatment

Rockwell C49

Not Rated

REACH

Not Compliant

RoHS

Compliant with Exemptions

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DFARS Specialty Metals

Exempt

Export Control Classification Number (ECCN)

Heat Treatable

153 Products

About Steel

Compare over 50 grades of steel and cast iron to find the right material for you—all with material certificates for traceability.

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
Fabrication: Seamless
Specifications Met: See table

Also known as chrome-moly steel, these 4130 alloy steel round tubes have low carbon content for good weldability. They’re often used for roll cages and frames. 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.

Certificates with a traceable lot number are available for these products. Download certificates from ORDER HISTORY after your order ships.

0.028" Wall Thick.
OD	ID	Yield Strength	Hardness	Maximum Hardness After Heat Treatment	Specifications Met	Straightness Tolerance		1/2 ft. Lg.	1 ft. Lg.	3 ft. Lg.	4 ft. Lg.	6 ft. Lg.	8 ft. Lg.	12 ft. Lg.
1/4"	0.194"	70,000 psi	Rockwell C19	Rockwell C49	MIL-T-6736, SAE AMS-T-6736, SAE AMS6360	0.030" per 3 ft.	000000000	00	00000	000000	00	000000	000000	00
3/8"	0.319"	70,000 psi	Rockwell C19	Rockwell C49	MIL-T-6736, SAE AMS-T-6736, SAE AMS6360	0.030" per 3 ft.	000000000	00	0000	00000	00	00000	00	00
1/2"	0.444"	70,000 psi	Rockwell C19	Rockwell C49	MIL-T-6736, SAE AMS-T-6736, SAE AMS6360	0.030" per 3 ft.	000000000	00	0000	00000	00	00000	00	00
5/8"	0.569"	70,000 psi	Rockwell C19	Rockwell C49	MIL-T-6736, SAE AMS-T-6736, SAE AMS6360	0.030" per 3 ft.	000000000	00	0000	00000	00	00000	00	00
3/4"	0.694"	70,000 psi	Rockwell C19	Rockwell C49	MIL-T-6736, SAE AMS-T-6736, SAE AMS6360	0.030" per 3 ft.	000000000	00	0000	00000	00	00000	00	00
1"	0.944"	70,000 psi	Rockwell C19	Rockwell C49	MIL-T-6736, SAE AMS-T-6736, SAE AMS6360	0.030" per 3 ft.	000000000	00	00000	00000	00	00000	00	00
0.035" Wall Thick.
3/16"	0.118"	70,000 psi	Rockwell C19	Rockwell C49	MIL-T-6736, SAE AMS-T-6736, SAE AMS6360	0.030" per 3 ft.	000000000	00	0000	00000	00	00000	00	00
1/4"	0.18"	70,000 psi	Rockwell C19	Rockwell C49	MIL-T-6736, SAE AMS-T-6736, SAE AMS6360	0.030" per 3 ft.	000000000	00	0000	00000	000000	00000	00000	00
5/16"	0.243"	70,000 psi	Rockwell C19	Rockwell C49	MIL-T-6736, SAE AMS-T-6736, SAE AMS6360	0.030" per 3 ft.	000000000	00	0000	00000	00000	00000	00000	00
3/8"	0.305"	70,000 psi	Rockwell C19	Rockwell C49	MIL-T-6736, SAE AMS-T-6736, SAE AMS6360	0.030" per 3 ft.	000000000	00	0000	00000	00	00000	00000	00
1/2"	0.43"	70,000 psi	Rockwell C19	Rockwell C49	MIL-T-6736, SAE AMS-T-6736, SAE AMS6360	0.030" per 3 ft.	000000000	00	0000	00000	00000	00000	00000	00
5/8"	0.555"	70,000 psi	Rockwell C19	Rockwell C49	MIL-T-6736, SAE AMS-T-6736, SAE AMS6360	0.030" per 3 ft.	000000000	00	0000	00000	00000	00000	00000	00
3/4"	0.68"	70,000 psi	Rockwell C19	Rockwell C49	MIL-T-6736, SAE AMS-T-6736, SAE AMS6360	0.030" per 3 ft.	000000000	00	0000	00000	00000	00000	00000	00
7/8"	0.805"	70,000 psi	Rockwell C19	Rockwell C49	MIL-T-6736, SAE AMS-T-6736, SAE AMS6360	0.030" per 3 ft.	000000000	00	00000	00000	00	00000	00	00
1"	0.93"	70,000 psi	Rockwell C19	Rockwell C49	MIL-T-6736, SAE AMS-T-6736, SAE AMS6360	0.030" per 3 ft.	000000000	00	00000	00000	00	00000	00	00
1 1/8"	1.055"	70,000 psi	Rockwell C19	Rockwell C49	MIL-T-6736, SAE AMS-T-6736, SAE AMS6360	0.030" per 3 ft.	000000000	00	00000	00000	00	00000	00	00
1 1/4"	1.18"	70,000 psi	Rockwell C19	Rockwell C49	MIL-T-6736, SAE AMS-T-6736, SAE AMS6360	0.030" per 3 ft.	000000000	00	00000	00000	00	00000	00	00
1 3/8"	1.305"	70,000 psi	Rockwell C19	Rockwell C49	MIL-T-6736, SAE AMS-T-6736, SAE AMS6360	0.030" per 3 ft.	000000000	00	00000	00000	00	00000	00	00
1 1/2"	1.43"	70,000 psi	Rockwell C19	Rockwell C49	MIL-T-6736, SAE AMS-T-6736, SAE AMS6360	0.030" per 3 ft.	000000000	00	00000	00000	00	00000	00	00
0.049" Wall Thick.
1/4"	0.152"	70,000 psi	Rockwell C19	Rockwell C49	MIL-T-6736, SAE AMS-T-6736, SAE AMS6360	0.030" per 3 ft.	000000000	00	0000	00000	00	00000	00000	00
5/16"	0.215"	70,000 psi	Rockwell C19	Rockwell C49	MIL-T-6736, SAE AMS-T-6736, SAE AMS6360	0.030" per 3 ft.	000000000	00	0000	00000	00	00000	00	00
3/8"	0.277"	70,000 psi	Rockwell C19	Rockwell C49	MIL-T-6736, SAE AMS-T-6736, SAE AMS6360	0.030" per 3 ft.	000000000	00	0000	00000	00000	00000	00000	00
7/16"	0.34"	70,000 psi	Rockwell C19	Rockwell C49	MIL-T-6736, SAE AMS-T-6736, SAE AMS6360	0.030" per 3 ft.	000000000	00	0000	00000	00	00000	00	00
1/2"	0.402"	70,000 psi	Rockwell C19	Rockwell C49	MIL-T-6736, SAE AMS-T-6736, SAE AMS6360	0.030" per 3 ft.	000000000	00	0000	00000	00	00000	00000	00
5/8"	0.527"	70,000 psi	Rockwell C19	Rockwell C49	MIL-T-6736, SAE AMS-T-6736, SAE AMS6360	0.030" per 3 ft.	000000000	00	0000	00000	00	00000	00000	00
3/4"	0.652"	70,000 psi	Rockwell C19	Rockwell C49	MIL-T-6736, SAE AMS-T-6736, SAE AMS6360	0.030" per 3 ft.	000000000	00	0000	00000	00	00000	00000	00
7/8"	0.777"	70,000 psi	Rockwell C19	Rockwell C49	MIL-T-6736, SAE AMS-T-6736, SAE AMS6360	0.030" per 3 ft.	000000000	00	00000	00000	00	00000	00000	00
1"	0.902"	70,000 psi	Rockwell C19	__	MIL-T-6736, SAE AMS-T-6736, SAE AMS6360	0.030" per 3 ft.	000000000	00	00000	00000	00	00000	00000	00
1 1/8"	1.027"	70,000 psi	Rockwell C19	Rockwell C49	MIL-T-6736, SAE AMS-T-6736, SAE AMS6360	0.030" per 3 ft.	000000000	00	00000	00000	00	00000	00	00
1 1/4"	1.152"	70,000 psi	Rockwell C19	Rockwell C49	MIL-T-6736, SAE AMS-T-6736, SAE AMS6360	0.030" per 3 ft.	000000000	00	00000	00000	00	00000	00	00
1 3/8"	1.277"	70,000 psi	Rockwell C19	Rockwell C49	MIL-T-6736, SAE AMS-T-6736, SAE AMS6360	0.030" per 3 ft.	000000000	00	00000	00000	00	00000	00	00
1 1/2"	1.402"	70,000 psi	Rockwell C19	Rockwell C49	MIL-T-6736, SAE AMS-T-6736, SAE AMS6360	0.030" per 3 ft.	000000000	00	00000	00000	00	00000	00	00
1 3/4"	1.652"	70,000 psi	Rockwell C19	Rockwell C49	MIL-T-6736, SAE AMS-T-6736, SAE AMS6360	0.030" per 3 ft.	000000000	00	00000	00000	00	000000	00	00
2"	1.902"	70,000 psi	Rockwell C19	Rockwell C49	MIL-T-6736, SAE AMS-T-6736, SAE AMS6360	0.030" per 3 ft.	000000000	00	00000	00000	00	000000	00	00
0.058" Wall Thick.
3/8"	0.259"	70,000 psi	Rockwell C19	Rockwell C49	MIL-T-6736, SAE AMS-T-6736, SAE AMS6360	0.030" per 3 ft.	000000000	00	0000	00000	00000	00000	00000	00
7/16"	0.322"	70,000 psi	Rockwell C19	Rockwell C49	MIL-T-6736, SAE AMS-T-6736, SAE AMS6360	0.030" per 3 ft.	000000000	00	00000	00000	00	00000	00	00
1/2"	0.384"	70,000 psi	Rockwell C19	__	MIL-T-6736, SAE AMS-T-6736, SAE AMS6360	0.030" per 3 ft.	000000000	00	00000	00000	00000	00000	00000	000000
5/8"	0.509"	70,000 psi	Rockwell C19	Rockwell C49	MIL-T-6736, SAE AMS-T-6736, SAE AMS6360	0.030" per 3 ft.	000000000	00	00000	00000	00000	00000	00000	00
3/4"	0.634"	70,000 psi	Rockwell C19	Rockwell C49	MIL-T-6736, SAE AMS-T-6736, SAE AMS6360	0.030" per 3 ft.	000000000	00	00000	00000	00000	00000	00000	00
7/8"	0.759"	70,000 psi	Rockwell C19	Rockwell C49	MIL-T-6736, SAE AMS-T-6736, SAE AMS6360	0.030" per 3 ft.	000000000	00	00000	00000	00000	00000	00000	00
1"	0.884"	70,000 psi	Rockwell C19	__	MIL-T-6736, SAE AMS-T-6736, SAE AMS6360	0.030" per 3 ft.	000000000	00	00000	00000	00	00000	00000	00
1 1/8"	1.009"	70,000 psi	Rockwell C19	Rockwell C49	MIL-T-6736, SAE AMS-T-6736, SAE AMS6360	0.030" per 3 ft.	000000000	00	00000	00000	00	00000	00	00
1 1/4"	1.134"	70,000 psi	Rockwell C19	Rockwell C49	MIL-T-6736, SAE AMS-T-6736, SAE AMS6360	0.030" per 3 ft.	000000000	00	00000	00000	00	00000	00	00
1 3/8"	1.259"	70,000 psi	Rockwell C19	Rockwell C49	MIL-T-6736, SAE AMS-T-6736, SAE AMS6360	0.030" per 3 ft.	000000000	00	00000	00000	00	00000	00	00
1 1/2"	1.384"	70,000 psi	Rockwell C19	Rockwell C49	MIL-T-6736, SAE AMS-T-6736, SAE AMS6360	0.030" per 3 ft.	000000000	00	00000	00000	00	00000	00	00
1 3/4"	1.634"	70,000 psi	Rockwell C19	Rockwell C49	MIL-T-6736, SAE AMS-T-6736, SAE AMS6360	0.030" per 3 ft.	000000000	00	00000	00000	00	00000	00	00
0.065" Wall Thick.
1/4"	0.12"	70,000 psi	Rockwell C19	Rockwell C49	MIL-T-6736, SAE AMS-T-6736, SAE AMS6360	0.030" per 3 ft.	000000000	00	0000	00000	00	00000	00000	00
5/16"	0.183"	70,000 psi	Rockwell C19	Rockwell C49	MIL-T-6736, SAE AMS-T-6736, SAE AMS6360	0.030" per 3 ft.	000000000	00	0000	00000	00	00000	00	00
3/8"	0.245"	70,000 psi	Rockwell C19	Rockwell C49	MIL-T-6736, SAE AMS-T-6736, SAE AMS6360	0.030" per 3 ft.	000000000	00	0000	00000	00000	00000	00000	00
7/16"	0.308"	70,000 psi	Rockwell C19	Rockwell C49	MIL-T-6736, SAE AMS-T-6736, SAE AMS6360	0.030" per 3 ft.	000000000	00	0000	00000	00	00000	00	00
1/2"	0.37"	70,000 psi	Rockwell C19	Rockwell C49	MIL-T-6736, SAE AMS-T-6736, SAE AMS6360	0.030" per 3 ft.	000000000	00	00000	00000	00000	00000	00000	00
9/16"	0.433"	70,000 psi	Rockwell C19	Rockwell C49	MIL-T-6736, SAE AMS-T-6736, SAE AMS6360	0.030" per 3 ft.	000000000	00	00000	00000	00	00000	00	00
5/8"	0.495"	70,000 psi	Rockwell C19	Rockwell C49	MIL-T-6736, SAE AMS-T-6736, SAE AMS6360	0.030" per 3 ft.	000000000	00	00000	00000	00000	00000	00000	00
3/4"	0.62"	70,000 psi	Rockwell C19	Rockwell C49	MIL-T-6736, SAE AMS-T-6736, SAE AMS6360	0.030" per 3 ft.	000000000	00	00000	00000	00000	00000	00000	00000
7/8"	0.745"	70,000 psi	Rockwell C19	Rockwell C49	MIL-T-6736, SAE AMS-T-6736, SAE AMS6360	0.030" per 3 ft.	000000000	00	00000	00000	00	00000	00000	00
1"	0.87"	70,000 psi	Rockwell C19	Rockwell C49	MIL-T-6736, SAE AMS-T-6736, SAE AMS6360	0.030" per 3 ft.	000000000	00	00000	00000	00000	00000	00000	00000
1 1/8"	0.995"	70,000 psi	Rockwell C19	Rockwell C49	MIL-T-6736, SAE AMS-T-6736, SAE AMS6360	0.030" per 3 ft.	000000000	00	00000	00000	00000	00000	00000	00
1 1/4"	1.12"	70,000 psi	Rockwell C19	__	MIL-T-6736, SAE AMS-T-6736, SAE AMS6360	0.030" per 3 ft.	000000000	00	00000	00000	00	00000	00000	00
1 3/8"	1.245"	70,000 psi	Rockwell C19	Rockwell C49	MIL-T-6736, SAE AMS-T-6736, SAE AMS6360	0.030" per 3 ft.	000000000	00	00000	00000	00	00000	00	00
1 1/2"	1.37"	70,000 psi	Rockwell C19	Rockwell C49	MIL-T-6736, SAE AMS-T-6736, SAE AMS6360	0.030" per 3 ft.	000000000	00	00000	00000	00	00000	00	00
1 5/8"	1.495"	70,000 psi	Rockwell C19	Rockwell C49	MIL-T-6736, SAE AMS-T-6736, SAE AMS6360	0.030" per 3 ft.	000000000	00	00000	00000	00	00000	00	00
1 3/4"	1.62"	70,000 psi	Rockwell C19	Rockwell C49	MIL-T-6736, SAE AMS-T-6736, SAE AMS6360	0.030" per 3 ft.	000000000	00	00000	00000	00	00000	00	00
2"	1.87"	70,000 psi	Rockwell C19	Rockwell C49	MIL-T-6736, SAE AMS-T-6736, SAE AMS6360	0.030" per 3 ft.	000000000	00	00000	00000	00	000000	00	00
0.083" Wall Thick.
3/8"	0.209"	70,000 psi	Rockwell C19	Rockwell C49	MIL-T-6736, SAE AMS-T-6736, SAE AMS6360	0.030" per 3 ft.	000000000	00	00000	00000	00000	00000	00000	00
7/16"	0.272"	70,000 psi	Rockwell C19	Rockwell C49	MIL-T-6736, SAE AMS-T-6736, SAE AMS6360	0.030" per 3 ft.	000000000	00	00000	00000	00	00000	00	00
1/2"	0.334"	70,000 psi	Rockwell C19	Rockwell C49	MIL-T-6736, SAE AMS-T-6736, SAE AMS6360	0.030" per 3 ft.	000000000	00	00000	00000	00	00000	00000	00
9/16"	0.397"	70,000 psi	Rockwell C19	Rockwell C49	MIL-T-6736, SAE AMS-T-6736, SAE AMS6360	0.030" per 3 ft.	000000000	00	00000	00000	00	00000	00	00
5/8"	0.459"	70,000 psi	Rockwell C19	Rockwell C49	MIL-T-6736, SAE AMS-T-6736, SAE AMS6360	0.030" per 3 ft.	000000000	00	00000	00000	00	00000	00	00
3/4"	0.584"	70,000 psi	Rockwell C19	Rockwell C49	MIL-T-6736, SAE AMS-T-6736, SAE AMS6360	0.030" per 3 ft.	000000000	00	00000	00000	00	00000	00	00
7/8"	0.709"	70,000 psi	Rockwell C19	Rockwell C49	MIL-T-6736, SAE AMS-T-6736, SAE AMS6360	0.030" per 3 ft.	000000000	00	00000	00000	00	00000	00	00
1"	0.834"	70,000 psi	Rockwell C19	__	MIL-T-6736, SAE AMS-T-6736, SAE AMS6360	0.030" per 3 ft.	000000000	00	00000	00000	00000	00000	00000	00
1 1/8"	0.959"	70,000 psi	Rockwell C19	Rockwell C49	MIL-T-6736, SAE AMS-T-6736, SAE AMS6360	0.030" per 3 ft.	000000000	00	00000	00000	00	00000	00	00
1 1/4"	1.084"	70,000 psi	Rockwell C19	__	MIL-T-6736, SAE AMS-T-6736, SAE AMS6360	0.030" per 3 ft.	000000000	00	00000	00000	00	00000	000000	00
1 3/8"	1.209"	70,000 psi	Rockwell C19	Rockwell C49	MIL-T-6736, SAE AMS-T-6736, SAE AMS6360	0.030" per 3 ft.	000000000	00	00000	00000	00	00000	00	00
1 1/2"	1.334"	70,000 psi	Rockwell C19	Rockwell C49	MIL-T-6736, SAE AMS-T-6736, SAE AMS6360	0.030" per 3 ft.	000000000	00	00000	00000	00	00000	00	00
1 5/8"	1.459"	70,000 psi	Rockwell C19	Rockwell C49	MIL-T-6736, SAE AMS-T-6736, SAE AMS6360	0.030" per 3 ft.	000000000	00	00000	00000	00	000000	00	00
1 3/4"	1.584"	70,000 psi	Rockwell C19	Rockwell C49	MIL-T-6736, SAE AMS-T-6736, SAE AMS6360	0.030" per 3 ft.	000000000	00	00000	00000	00	000000	00	00
2"	1.834"	70,000 psi	Rockwell C19	Rockwell C49	MIL-T-6736, SAE AMS-T-6736, SAE AMS6360	0.030" per 3 ft.	000000000	00	00000	00000	00	000000	00	00
0.095" Wall Thick.
5/16"	0.123"	70,000 psi	Rockwell C19	Rockwell C49	MIL-T-6736, SAE AMS-T-6736, SAE AMS6360	0.030" per 3 ft.	000000000	00	00000	00000	00	00000	00	00
7/16"	0.248"	70,000 psi	Rockwell C19	Rockwell C49	MIL-T-6736, SAE AMS-T-6736, SAE AMS6360	0.030" per 3 ft.	000000000	00	00000	00000	00	00000	00	00
1/2"	0.31"	70,000 psi	Rockwell C19	Rockwell C49	MIL-T-6736, SAE AMS-T-6736, SAE AMS6360	0.030" per 3 ft.	000000000	000000	00000	00000	00	00000	00	00
3/4"	0.56"	70,000 psi	Rockwell C19	Rockwell C49	MIL-T-6736, SAE AMS-T-6736, SAE AMS6360	0.030" per 3 ft.	000000000	00	00000	00000	00	00000	00	00
1"	0.81"	70,000 psi	Rockwell C19	__	MIL-T-6736, SAE AMS-T-6736, SAE AMS6360	0.030" per 3 ft.	000000000	00000	00000	00000	00000	00000	000000	00
1 1/8"	0.935"	70,000 psi	Rockwell C19	Rockwell C49	MIL-T-6736, SAE AMS-T-6736, SAE AMS6360	0.030" per 3 ft.	000000000	00	00000	00000	00	00000	00	00
1 1/4"	1.06"	70,000 psi	Rockwell C19	__	MIL-T-6736, SAE AMS-T-6736, SAE AMS6360	0.030" per 3 ft.	000000000	00000	00000	00000	00000	000000	000000	00
1 3/8"	1.185"	70,000 psi	Rockwell C19	Rockwell C49	MIL-T-6736, SAE AMS-T-6736, SAE AMS6360	0.030" per 3 ft.	000000000	00000	00000	00000	00	000000	00	00
1 1/2"	1.31"	70,000 psi	Rockwell C19	Rockwell C49	MIL-T-6736, SAE AMS-T-6736, SAE AMS6360	0.030" per 3 ft.	000000000	00	00000	00000	00	000000	000000	00
1 5/8"	1.435"	70,000 psi	Rockwell C19	Rockwell C49	MIL-T-6736, SAE AMS-T-6736, SAE AMS6360	0.030" per 3 ft.	000000000	00	00000	00000	00	000000	00	00
1 3/4"	1.56"	70,000 psi	Rockwell C19	Rockwell C49	MIL-T-6736, SAE AMS-T-6736, SAE AMS6360	0.030" per 3 ft.	000000000	00	00000	00000	00	000000	00	00
2"	1.81"	70,000 psi	Rockwell C19	Rockwell C49	MIL-T-6736, SAE AMS-T-6736, SAE AMS6360	0.030" per 3 ft.	000000000	00	00000	00000	00	000000	00	00
2 1/2"	2.31"	70,000 psi	Rockwell C19	Rockwell C49	MIL-T-6736, SAE AMS-T-6736, SAE AMS6360	0.030" per 3 ft.	000000000	00000	00000	00000	00	000000	00	00
0.12" Wall Thick.
3/8"	0.135"	70,000 psi	Rockwell C19	Rockwell C49	MIL-T-6736, SAE AMS-T-6736, SAE AMS6360	0.030" per 3 ft.	000000000	00	00000	00000	00000	00000	00000	00
7/16"	0.198"	70,000 psi	Rockwell C19	Rockwell C49	MIL-T-6736, SAE AMS-T-6736, SAE AMS6360	0.030" per 3 ft.	000000000	00	00000	00000	00	00000	00	00
1/2"	0.26"	70,000 psi	Rockwell C19	Rockwell C49	MIL-T-6736, SAE AMS-T-6736, SAE AMS6360	0.030" per 3 ft.	000000000	00	00000	00000	00000	00000	00000	00
9/16"	0.323"	70,000 psi	Rockwell C19	Rockwell C49	MIL-T-6736, SAE AMS-T-6736, SAE AMS6360	0.030" per 3 ft.	000000000	00	00000	00000	00	00000	00	00
5/8"	0.385"	70,000 psi	Rockwell C19	Rockwell C49	MIL-T-6736, SAE AMS-T-6736, SAE AMS6360	0.030" per 3 ft.	000000000	00	00000	00000	00000	00000	00000	000000
3/4"	0.51"	70,000 psi	Rockwell C19	__	MIL-T-6736, SAE AMS-T-6736, SAE AMS6360	0.030" per 3 ft.	000000000	00	00000	00000	00000	00000	00000	000000
7/8"	0.635"	70,000 psi	Rockwell C19	Rockwell C49	MIL-T-6736, SAE AMS-T-6736, SAE AMS6360	0.030" per 3 ft.	000000000	00000	00000	00000	00000	00000	000000	00
1"	0.76"	70,000 psi	Rockwell C19	__	MIL-T-6736, SAE AMS-T-6736, SAE AMS6360	0.030" per 3 ft.	000000000	00000	00000	00000	00000	00000	000000	000000
1 1/8"	0.885"	70,000 psi	Rockwell C19	Rockwell C49	MIL-T-6736, SAE AMS-T-6736, SAE AMS6360	0.030" per 3 ft.	000000000	00	00000	00000	00	000000	00	00
1 1/4"	1.01"	70,000 psi	Rockwell C19	__	MIL-T-6736, SAE AMS-T-6736, SAE AMS6360	0.030" per 3 ft.	000000000	00000	00000	00000	00000	000000	000000	00
1 3/8"	1.135"	70,000 psi	Rockwell C19	Rockwell C49	MIL-T-6736, SAE AMS-T-6736, SAE AMS6360	0.030" per 3 ft.	000000000	00000	00000	00000	00000	000000	000000	00
1 1/2"	1.26"	70,000 psi	Rockwell C19	__	MIL-T-6736, SAE AMS-T-6736, SAE AMS6360	0.030" per 3 ft.	000000000	00000	00000	00000	00000	000000	000000	00
1 3/4"	1.51"	70,000 psi	Rockwell C19	__	MIL-T-6736, SAE AMS-T-6736, SAE AMS6360	0.030" per 3 ft.	000000000	00000	00000	00000	00000	000000	000000	00
2"	1.76"	70,000 psi	Rockwell C19	Rockwell C49	MIL-T-6736, SAE AMS-T-6736, SAE AMS6360	0.030" per 3 ft.	000000000	00000	00000	00000	00	000000	00	00
2 1/4"	2.01"	70,000 psi	Rockwell C19	__	MIL-T-6736, SAE AMS-T-6736, SAE AMS6360	0.030" per 3 ft.	000000000	00000	00000	00000	00	000000	00	00
2 1/2"	2.26"	70,000 psi	Rockwell C19	Rockwell C49	MIL-T-6736, SAE AMS-T-6736, SAE AMS6360	0.030" per 3 ft.	000000000	00000	00000	000000	00	000000	00	00
3"	2.76"	70,000 psi	Rockwell C19	Rockwell C49	MIL-T-6736, SAE AMS-T-6736, SAE AMS6360	0.030" per 3 ft.	000000000	00	000000	000000	00	000000	00	00
0.156" Wall Thick.
5/8"	0.313"	70,000 psi	Rockwell C19	Rockwell C49	MIL-T-6736, SAE AMS-T-6736, SAE AMS6360	0.030" per 3 ft.	000000000	00000	00000	00000	00	000000	00	00
0.188" Wall Thick.
5/8"	0.249"	70,000 psi	Rockwell C19	Rockwell C49	MIL-T-6736, SAE AMS-T-6736, SAE AMS6360	0.030" per 3 ft.	000000000	00000	00000	00000	00	00000	00	00
3/4"	0.374"	70,000 psi	Rockwell C19	Rockwell C49	MIL-T-6736, SAE AMS-T-6736, SAE AMS6360	0.030" per 3 ft.	000000000	00000	00000	00000	00000	00000	000000	00
1"	0.624"	70,000 psi	Rockwell C19	__	MIL-T-6736, SAE AMS-T-6736, SAE AMS6360	0.030" per 3 ft.	000000000	00000	00000	00000	00000	000000	000000	00
1 1/8"	0.749"	70,000 psi	Rockwell C19	Rockwell C49	MIL-T-6736, SAE AMS-T-6736, SAE AMS6360	0.030" per 3 ft.	000000000	00000	00000	00000	00	000000	00	00
1 1/4"	0.874"	70,000 psi	Rockwell C19	Rockwell C49	MIL-T-6736, SAE AMS-T-6736, SAE AMS6360	0.030" per 3 ft.	000000000	00000	00000	00000	00	000000	00	00
1 1/2"	1.124"	70,000 psi	Rockwell C19	__	MIL-T-6736, SAE AMS-T-6736, SAE AMS6360	0.030" per 3 ft.	000000000	00000	00000	00000	000000	000000	000000	00
1 3/4"	1.374"	70,000 psi	Rockwell C19	Not Rated	MIL-T-6736, SAE AMS-T-6736, SAE AMS6360	0.030" per 3 ft.	000000000	00	00000	00000	00	000000	00	00
2"	1.624"	70,000 psi	Rockwell C19	Rockwell C49	MIL-T-6736, SAE AMS-T-6736, SAE AMS6360	0.030" per 3 ft.	000000000	00000	00000	000000	00	000000	00	00
2 1/2"	2.124"	70,000 psi	Rockwell C19	Rockwell C49	MIL-T-6736, SAE AMS-T-6736, SAE AMS6360	0.030" per 3 ft.	000000000	00000	00000	000000	00	000000	00	00
1/4" Wall Thick.
1"	1/2"	70,000 psi	Rockwell C19	__	MIL-T-6736, SAE AMS-T-6736, SAE AMS6360	0.030" per 3 ft.	000000000	00000	00000	00000	00000	000000	000000	00
1 1/8"	5/8"	70,000 psi	Rockwell C19	Not Rated	MIL-T-6736, SAE AMS-T-6736, SAE AMS6360	0.030" per 3 ft.	000000000	00	00000	000000	00	000000	00	00
1 1/4"	3/4"	70,000 psi	Rockwell C19	Not Rated	MIL-T-6736, SAE AMS-T-6736, SAE AMS6360	0.030" per 3 ft.	000000000	00	00000	000000	00	000000	00	00
1 1/2"	1"	70,000 psi	Rockwell C19	Not Rated	MIL-T-6736, SAE AMS-T-6736, SAE AMS6360	0.030" per 3 ft.	000000000	00000	00	000000	00	000000	00	00
1 3/4"	1 1/4"	70,000 psi	Rockwell C19	Not Rated	MIL-T-6736, SAE AMS-T-6736, SAE AMS6360	0.030" per 3 ft.	000000000	00	00000	000000	00	000000	00	00
2"	1 1/2"	70,000 psi	Rockwell C19	Rockwell C49	MIL-T-6736, SAE AMS-T-6736, SAE AMS6360	0.030" per 3 ft.	0000000	00000	00	00	00	00	00	00
2 1/2"	2"	70,000 psi	Rockwell C19	Not Rated	MIL-T-6736, SAE AMS-T-6736, SAE AMS6360	0.030" per 3 ft.	000000000	00	00000	000000	00	000000	00	00
3"	2 1/2"	70,000 psi	Rockwell C19	__	MIL-T-6736, SAE AMS-T-6736, SAE AMS6360	0.030" per 3 ft.	000000000	00000	00000	000000	00	000000	00	00
4"	3 1/2"	70,000 psi	Rockwell C19	Not Rated	MIL-T-6736, SAE AMS-T-6736, SAE AMS6360	0.030" per 3 ft.	000000000	00	000000	000000	00	00	00	00

							3" Lg.
OD	ID	Yield Strength	Hardness	Maximum Hardness After Heat Treatment	Specifications Met	Straightness Tolerance		Each
0.12" Wall Thick.
1 3/4"	1.51"	70,000 psi	Rockwell C19	Not Rated	MIL-T-6736, SAE AMS-T-6736, SAE AMS6360	0.030" per 3 ft.	000000000	000000
2 1/4"	2.01"	70,000 psi	Rockwell C19	Not Rated	MIL-T-6736, SAE AMS-T-6736, SAE AMS6360	0.030" per 3 ft.	000000000	00000
0.188" Wall Thick.
1"	0.624"	70,000 psi	Rockwell C19	Not Rated	MIL-T-6736, SAE AMS-T-6736, SAE AMS6360	0.030" per 3 ft.	000000000	00000
1/4" Wall Thick.
1"	1/2"	70,000 psi	Rockwell C19	Not Rated	MIL-T-6736, SAE AMS-T-6736, SAE AMS6360	0.030" per 3 ft.	000000000	00000
1 1/2"	1"	70,000 psi	Rockwell C19	Not Rated	MIL-T-6736, SAE AMS-T-6736, SAE AMS6360	0.030" per 3 ft.	000000000	00000
2"	1 1/2"	70,000 psi	Rockwell C19	Not Rated	MIL-T-6736, SAE AMS-T-6736, SAE AMS6360	0.030" per 3 ft.	000000000	00000
3"	2 1/2"	70,000 psi	Rockwell C19	Not Rated	MIL-T-6736, SAE AMS-T-6736, SAE AMS6360	0.030" per 3 ft.	000000000	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.

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