Chrome Tubing | McMaster-Carr

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P22 Chrome-Moly Steel

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Yield Strength

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Specifications Met

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Maximum Hardness After Heat Treatment

Rockwell C49

Rockwell C60

Not Rated

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188 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.

How to Identify and Measure Fittings

Pipe size is an industry designation, not the actual size. View information about how to measure threaded and unthreaded pipe and pipe fittings.

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	00000	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
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 1/2"	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
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
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

							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

Multipurpose 4140 Alloy Steel Round Tubes

Yield Strength: 60,000 psi
Hardness: Rockwell B85 (Medium)
Heat Treatable: Yes
Max. Hardness After Heat Treatment: Rockwell C60
Fabrication: Seamless
Specifications Met: ASTM A519

Made from alloy steel, also known as chrome-moly steel, these 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. These tubes have been manufactured to meet ASTM standards for quality and performance.

Note: Tubes may be made from either 4140 or 4142 alloy steel. They are interchangeable in most applications.

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

1/2" Wall Thick.
OD	ID	Heat Treatment	Straightness Tolerance		1/2 ft. Lg.	1 ft. Lg.	3 ft. Lg.	4 ft. Lg.	6 ft. Lg.	8 ft. Lg.
2 1/2"	1 1/2"	Annealed (Softened)	0.030" per ft.	0000000	000000	000000	0000000	0000000	0000000	0000000
2 3/4"	1 3/4"	Annealed (Softened)	0.030" per ft.	0000000	00000	000000	000000	00	000000	00
3"	2"	Annealed (Softened)	0.030" per ft.	0000000	00000	000000	000000	00	000000	00
3 1/4"	2 1/4"	Annealed (Softened)	0.030" per ft.	0000000	00000	000000	000000	00	000000	00
3 3/4"	2 3/4"	Annealed (Softened)	0.030" per ft.	0000000	00000	000000	000000	00	000000	00
4"	3"	Annealed (Softened)	0.030" per ft.	0000000	00000	000000	000000	00	000000	00
5/8" Wall Thick.
3 1/4"	2"	Annealed (Softened)	0.030" per ft.	0000000	00	000000	000000	00	000000	00
4"	2 3/4"	Annealed (Softened)	0.030" per ft.	0000000	00000	000000	000000	00	000000	00
3/4" Wall Thick.
3"	1 1/2"	Annealed (Softened)	0.030" per ft.	0000000	00000	000000	000000	00	000000	00
3 1/4"	1 3/4"	Annealed (Softened)	0.030" per ft.	0000000	00	000000	000000	00	000000	00
3 3/4"	2 1/4"	Annealed (Softened)	0.030" per ft.	0000000	000000	000000	000000	00	000000	00
4 1/4"	2 3/4"	Annealed (Softened)	0.030" per ft.	0000000	000000	000000	000000	00	000000	00
4 3/4"	3 1/4"	Annealed (Softened)	0.030" per ft.	0000000	000000	000000	000000	00	000000	00
1" Wall Thick.
3 1/2"	1 1/2"	Annealed (Softened)	0.030" per ft.	0000000	00000	000000	000000	00	000000	00
1 1/4" Wall Thick.
4 1/2"	2"	Annealed (Softened)	0.030" per ft.	0000000	000000	000000	000000	00	00000000	00
5"	2 1/2"	Annealed (Softened)	0.030" per ft.	0000000	000000	000000	000000	00	00000000	00
5 1/2"	3"	Annealed (Softened)	0.030" per ft.	0000000	000000	000000	000000	00	00000000	00
2" Wall Thick.
6"	2"	Annealed (Softened)	0.030" per ft.	0000000	00	000000	00000000	00	00000000	00

				3" Lg.
OD	ID	Heat Treatment	Straightness Tolerance		Each
1/2" Wall Thick.
2 1/2"	1 1/2"	Annealed (Softened)	0.030" per ft.	00000000	000000
2 3/4"	1 3/4"	Annealed (Softened)	0.030" per ft.	00000000	00000
3"	2"	Annealed (Softened)	0.030" per ft.	00000000	00000
3 3/4"	2 3/4"	Annealed (Softened)	0.030" per ft.	00000000	00000
3/4" Wall Thick.
3"	1 1/2"	Annealed (Softened)	0.030" per ft.	00000000	00000
4 3/4"	3 1/4"	Annealed (Softened)	0.030" per ft.	00000000	00000
1" Wall Thick.
3 1/2"	1 1/2"	Annealed (Softened)	0.030" per ft.	00000000	00000

Hard Wear-Resistant 52100 Alloy Steel Tubes

Yield Strength: See table
Hardness: See table
Heat Treatable: Yes
Maximum Hardness After Heat Treatment: Rockwell C60
Specifications Met: ASTM A295

Easier to machine than 52100 alloy steel rods, these extremely hard and wear-resistant tubes are often used to create bearings, bushings, and other cylindrical parts that are under constant stress. They’re also known as chrome steel.

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

0.245" Wall Thickness (-0.0123" to 0.0123" Tolerance)
OD	OD Tolerance	ID	ID Tolerance	Yield Strength, psi	Hardness		1 ft. Lg.	3 ft. Lg.	6 ft. Lg.
1.207"	-0.005" to 0.005"	0.717"	-0.01" to 0.01"	140,000	Rockwell B100	0000000	000000	0000000	0000000
0.309" Wall Thickness (-0.02" to 0.02" Tolerance)
1.315"	-0.004" to 0.016"	0.697"	-0.043" to 0.055"	140,000	Rockwell B100	0000000	00000	000000	000000
0.353" Wall Thickness (-0.0176" to 0.0176" Tolerance)
1.551"	-0.005" to 0.005"	0.846"	-0.01" to 0.01"	140,000	Rockwell B100	0000000	00000	000000	000000
0.382" Wall Thickness (-0.0191" to 0.0191" Tolerance)
2.071"	-0.006" to 0.006"	1.253"	-0.01" to 0.01"	140,000	Rockwell B100	0000000	000000	000000	000000
0.472" Wall Thickness (-0.0236" to 0.0236" Tolerance)
2.57"	-0.008" to 0.008"	1.627"	-0.01" to 0.01"	140,000	Rockwell B100	0000000	000000	000000	000000
0.807" Wall Thickness (-0.061" to 0.061" Tolerance)
3.138"	-0.019" to 0.019"	1.524"	Not Rated	50,000	Rockwell B95	0000000	000000	000000	000000

Thick-Wall Steel Unthreaded Pipe Nipples and Pipe

For Use With:
Steel: Air, Hydraulic Fluid, Natural Gas, Oil, Steam, Water
P22 Chrome-Moly Steel: Air, Natural Gas, Oil, Steam, Water
Specifications Met: See table
Fittings:
Steel: Use Class 3000 or Schedule 80 steel
P22 Chrome-Moly Steel: Use Class 3000 F22 Chrome-Moly Steel
Flanges:
Steel: Use Class 300 or Class 600 Steel

Thick, Schedule 80 walls give this pipe better strength than our standard-wall steel unthreaded pipe. Weld it to fittings and additional lengths of pipe. Welded connections are stronger than threaded connections and less likely to leak. Pipe is seamless, so it has a smooth interior for unrestricted flow. It is for use in noncorrosive environments.

P22 chrome-moly steel is stronger and easier to weld than plain steel. It resists scaling even in steam applications.

For technical drawings and 3-D models, click on a part number.

1/2 Pipe Size
Lg.	Wall Thick.	Construction	Material		Each
12"	0.147"	Seamless	P22 Chrome-Moly Steel	0000000	000000
36"	0.147"	Seamless	P22 Chrome-Moly Steel	0000000	000000
3/4 Pipe Size
12"	0.154"	Seamless	P22 Chrome-Moly Steel	0000000	00000
36"	0.154"	Seamless	P22 Chrome-Moly Steel	0000000	000000
1 Pipe Size
12"	0.179"	Seamless	P22 Chrome-Moly Steel	0000000	00000
36"	0.179"	Seamless	P22 Chrome-Moly Steel	0000000	000000
1 1/2 Pipe Size
12"	0.2"	Seamless	P22 Chrome-Moly Steel	0000000	000000
36"	0.2"	Seamless	P22 Chrome-Moly Steel	0000000	000000
2 Pipe Size
12"	0.218"	Seamless	P22 Chrome-Moly Steel	0000000	000000
36"	0.218"	Seamless	P22 Chrome-Moly Steel	0000000	000000

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How to Identify and Measure Fittings

Easy-to-Weld 4130 Alloy Steel Round Tubes

Easy-to-Weld 4130 Alloy Steel Rectangular Tubes

Multipurpose 4140 Alloy Steel Round Tubes

Hard Wear-Resistant 52100 Alloy Steel Tubes

Thick-Wall Steel Unthreaded Pipe Nipples and Pipe