Carbon Steel Hollow Rods

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	System of Measurement System of Measurement

Inch

Metric

	Wall Thickness Wall Thickness

	OD OD

	ID ID

	Shape Shape


Round Tube	Rectangular Tube

	Outside Width Outside Width

	Material Material

Low-Carbon Steel

AHSS Carbon Steel

Carbon Steel

	Outside Height Outside Height

	Length Length

	Fabrication Fabrication

Cold Worked

Hot Rolled

	Low-Carbon Steel Grade Low-Carbon Steel Grade

	Tolerance Rating Tolerance Rating

Oversized

Standard

	Yield Strength Yield Strength

80,000 psi or greater

Not Rated

	Heat Treatable Heat Treatable

Yes

	Elongation Elongation

	Hardness Rating Hardness Rating

Soft

Medium

Hard

	Hardness Hardness

	Inside Width Inside Width

	Inside Height Inside Height

	Heat Treatment Heat Treatment

Stress Relieved

Annealed (Softened)

	Specifications Met Specifications Met

ASTM A513

ASTM A500

	Weld-Together Framing Component Shape Weld-Together Framing Component Shape

	Weld-Together Framing Component Weld-Together Framing Component


Connector	Rail

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154 Products

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

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 fixture clamps, mounting plates, and spacers. This material can be surface hardened with heat treating.

Tubes

Yield Strength: See table
Hardness: See table
Heat Treatable: No
Specifcations Met: See Table

0.035" Wall Thick. (Standard Tolerance)
OD	OD Tolerance	ID	Yield Strength, psi	Heat Treatment	Hardness	Specifications Met		1 ft. Lg.	3 ft. Lg.	6 ft. Lg.
1/2"	-0.003" to 0.003"	0.43"	30,000	__	Rockwell B50 (Soft)	ASTM A500	0000000	00	00000	00000
0.049" Wall Thick. (Standard Tolerance)
1/2"	-0.003" to 0.003"	0.402"	30,000	__	Rockwell B50 (Soft)	ASTM A500	0000000	00	0000	0000
5/8"	-0.003" to 0.003"	0.527"	30,000	__	Rockwell B50 (Soft)	ASTM A500	0000000	00	0000	0000
3/4"	-0.003" to 0.003"	0.652"	30,000	__	Rockwell B50 (Soft)	ASTM A500	0000000	00	0000	0000
1"	-0.004" to 0.004"	0.902"	45,000	__	Rockwell B60 (Medium)	ASTM A513	00000000	00000	0000	00000
1 1/2"	-0.005" to 0.005"	1.402"	45,000	__	Rockwell B60 (Medium)	ASTM A513	00000000	0000	0000	00000
2"	-0.005" to 0.005"	1.902"	45,000	__	Rockwell B60 (Medium)	ASTM A513	00000000	0000	00000	00000
0.065" Wall Thick. (Standard Tolerance)
1/2"	-0.004" to 0.004"	0.37"	30,000	__	Rockwell B50 (Soft)	ASTM A500	0000000	00	0000	0000
5/8"	-0.003" to 0.003"	0.495"	30,000	__	Rockwell B50 (Soft)	ASTM A500	0000000	00	0000	0000
3/4"	-0.004" to 0.004"	0.62"	30,000	__	Rockwell B50 (Soft)	ASTM A500	0000000	00	0000	0000
7/8"	-0.004" to 0.004"	0.745"	30,000	__	Rockwell B50 (Soft)	ASTM A500	0000000	00	0000	00000
1"	-0.004" to 0.004"	0.87"	40,000	__	Rockwell B60 (Medium)	ASTM A513	00000000	0000	0000	00000
1 1/4"	-0.004" to 0.004"	1.12"	30,000	__	Rockwell B50 (Soft)	ASTM A500	0000000	0000	0000	00000
1 1/2"	-0.005" to 0.005"	1.37"	45,000	__	Rockwell B60 (Medium)	ASTM A513	00000000	0000	00000	00000
2"	-0.005" to 0.005"	1.87"	38,000	__	Rockwell B60 (Medium)	ASTM A513	00000000	0000	00000	00000
3"	-0.008" to 0.008"	2.87"	38,000	__	Rockwell B60 (Medium)	ASTM A513	00000000	0000	00000	00000
4"	-0.01" to 0.01"	3.87"	38,000	__	Rockwell B60 (Medium)	ASTM A513	00000000	00000	00000	00000
0.083" Wall Thick. (Standard Tolerance)
5/8"	-0.004" to 0.004"	0.459"	30,000	__	Rockwell B50 (Soft)	ASTM A500	0000000	00	0000	0000
3/4"	-0.004" to 0.004"	0.584"	30,000	__	Rockwell B50 (Soft)	ASTM A500	0000000	00	0000	00000
7/8"	-0.004" to 0.004"	0.709"	30,000	__	Rockwell B50 (Soft)	ASTM A500	0000000	00	0000	00000
1"	-0.004" to 0.004"	0.834"	30,000	__	Rockwell B50 (Soft)	ASTM A500	0000000	0000	0000	00000
0.095" Wall Thick. (Standard Tolerance)
3/4"	-0.004" to 0.004"	0.56"	30,000	__	Rockwell B50 (Soft)	ASTM A500	0000000	0000	0000	00000
1"	-0.004" to 0.004"	0.81"	30,000	__	Rockwell B50 (Soft)	ASTM A500	0000000	0000	0000	00000
1 3/4"	-0.004" to 0.004"	1.56"	30,000	__	Rockwell B50 (Soft)	ASTM A500	0000000	0000	00000	00000
0.12" Wall Thick. (Oversized Tolerance)
1/2"	0" to 0.005"	0.26"	75,000	__	Rockwell B85 (Medium)	ASTM A500	0000000	0000	00000	00000
0.12" Wall Thick. (Standard Tolerance)
3/4"	-0.004" to 0.004"	0.51"	30,000	__	Rockwell B50 (Soft)	ASTM A500	0000000	0000	0000	00000
7/8"	-0.004" to 0.004"	0.635"	30,000	__	Rockwell B50 (Soft)	ASTM A500	0000000	0000	00000	00000
1"	-0.004" to 0.004"	0.76"	38,000	__	Rockwell B60 (Medium)	ASTM A513	00000000	0000	00000	00000
1 1/8"	-0.004" to 0.004"	0.885"	30,000	__	Rockwell B50 (Soft)	ASTM A500	0000000	0000	00000	00000
1 1/4"	-0.004" to 0.004"	1.01"	30,000	__	Rockwell B50 (Soft)	ASTM A500	0000000	0000	00000	00000
1 1/2"	-0.005" to 0.005"	1.26"	38,000	__	Rockwell B60 (Medium)	ASTM A513	00000000	0000	00000	00000
1 3/4"	-0.004" to 0.004"	1.51"	30,000	__	Rockwell B50 (Soft)	ASTM A500	0000000	00000	00000	00000
2"	-0.004" to 0.004"	1.76"	30,000	__	Rockwell B50 (Soft)	ASTM A500	0000000	00000	00000	00000
2 1/4"	-0.004" to 0.004"	2.01"	30,000	__	Rockwell B50 (Soft)	ASTM A500	0000000	00000	00000	00000
3 1/2"	-0.009" to 0.009"	3.26"	38,000	__	Rockwell B60 (Medium)	ASTM A513	00000000	00000	00000	00000
4"	-0.01" to 0.01"	3.76"	38,000	__	Rockwell B60 (Medium)	ASTM A513	00000000	00000	00000	00000
4 1/2"	-0.02" to 0.02"	4.26"	38,000	__	Rockwell B60 (Medium)	ASTM A513	00000000	00000	00000	00000
0.134" Wall Thick. (Standard Tolerance)
1 5/8"	-0.004" to 0.004"	1.345"	38,000	__	Rockwell B60 (Medium)	ASTM A513	0000000	00000	00000	00000
0.188" Wall Thick. (Oversized Tolerance)
3/4"	0" to 0.005"	3/8"	45,000	Stress Relieved	Rockwell B60 (Medium)	ASTM A513	0000000	00000	00000	00000
1"	0" to 0.005"	5/8"	45,000	__	Rockwell B60 (Medium)	ASTM A513	0000000	00000	00000	00000
1 1/8"	0" to 0.005"	3/4"	45,000	Stress Relieved	Rockwell B60 (Medium)	ASTM A513	0000000	00000	00000	00000
1 1/4"	0" to 0.005"	7/8"	45,000	Stress Relieved	Rockwell B60 (Medium)	ASTM A513	0000000	00000	00000	00000
1 3/8"	0" to 0.005"	1"	45,000	Stress Relieved	Rockwell B60 (Medium)	ASTM A513	0000000	00000	00000	00000
1 1/2"	0" to 0.005"	1 1/8"	45,000	Stress Relieved	Rockwell B60 (Medium)	ASTM A513	0000000	00000	00000	000000
1 5/8"	0" to 0.005"	1 1/4"	45,000	Stress Relieved	Rockwell B60 (Medium)	ASTM A513	0000000	00000	00000	000000
1 3/4"	0" to 0.006"	1 3/8"	45,000	Stress Relieved	Rockwell B60 (Medium)	ASTM A513	0000000	00000	00000	000000
2"	0" to 0.006"	1 5/8"	45,000	Stress Relieved	Rockwell B60 (Medium)	ASTM A513	0000000	00000	00000	000000
2 1/2"	0" to 0.008"	2 1/8"	45,000	Stress Relieved	Rockwell B60 (Medium)	ASTM A513	0000000	00000	00000	000000
3"	0" to 0.009"	2 5/8"	45,000	Stress Relieved	Rockwell B60 (Medium)	ASTM A513	0000000	00000	000000	000000
3 1/8"	0" to 0.009"	2 3/4"	45,000	Stress Relieved	Rockwell B60 (Medium)	ASTM A513	0000000	00000	000000	000000
1/4" Wall Thick. (Oversized Tolerance)
1"	0" to 0.005"	1/2"	45,000	Stress Relieved	Rockwell B60 (Medium)	ASTM A513	0000000	00000	00000	00000
1 1/8"	0" to 0.005"	5/8"	45,000	Stress Relieved	Rockwell B60 (Medium)	ASTM A513	0000000	00000	00000	00000
1 1/4"	0" to 0.005"	3/4"	45,000	Stress Relieved	Rockwell B60 (Medium)	ASTM A513	0000000	00000	00000	000000
1 3/8"	0" to 0.005"	7/8"	45,000	Stress Relieved	Rockwell B60 (Medium)	ASTM A513	0000000	00000	00000	000000
1 1/2"	0" to 0.005"	1"	45,000	Stress Relieved	Rockwell B60 (Medium)	ASTM A513	0000000	00000	00000	000000
1 3/4"	0" to 0.006"	1 1/4"	45,000	Stress Relieved	Rockwell B60 (Medium)	ASTM A513	0000000	00000	00000	000000
2"	0" to 0.006"	1 1/2"	45,000	Stress Relieved	Rockwell B60 (Medium)	ASTM A513	0000000	00000	000000	000000
2 1/2"	0" to 0.008"	2"	45,000	Stress Relieved	Rockwell B60 (Medium)	ASTM A513	0000000	00000	00000	000000
3"	0" to 0.009"	2 1/2"	45,000	Stress Relieved	Rockwell B60 (Medium)	ASTM A513	0000000	00000	000000	000000
3 1/2"	0" to 0.01"	3"	45,000	Stress Relieved	Rockwell B60 (Medium)	ASTM A513	0000000	00000	000000	000000
4"	0" to 0.011"	3 1/2"	45,000	Stress Relieved	Rockwell B60 (Medium)	ASTM A513	0000000	00000	000000	000000
3/8" Wall Thick. (Oversized Tolerance)
1 1/2"	0" to 0.005"	3/4"	45,000	Stress Relieved	Rockwell B60 (Medium)	ASTM A513	0000000	00000	00000	000000
1 3/4"	0" to 0.006"	1"	45,000	Stress Relieved	Rockwell B60 (Medium)	ASTM A513	0000000	00000	000000	000000
2"	0" to 0.006"	1 1/4"	45,000	Stress Relieved	Rockwell B60 (Medium)	ASTM A513	0000000	00000	000000	000000
2 1/4"	0" to 0.007"	1 1/2"	45,000	Stress Relieved	Rockwell B60 (Medium)	ASTM A513	0000000	00000	000000	000000
2 1/2"	0" to 0.008"	1 3/4"	45,000	Stress Relieved	Rockwell B60 (Medium)	ASTM A513	0000000	00000	000000	000000
1/2" Wall Thick. (Oversized Tolerance)
1 1/2"	0" to 0.005"	1/2"	65,000	__	Rockwell B86 (Medium)	ASTM A500	0000000	00000	000000	000000
2"	0" to 0.005"	1"	75,000	__	Rockwell B85 (Medium)	ASTM A500	0000000	00000	000000	000000
2 3/4"	0" to 0.008"	1 3/4"	45,000	Stress Relieved	Rockwell B60 (Medium)	ASTM A513	0000000	00000	000000	000000
3"	0" to 0.009"	2"	45,000	Stress Relieved	Rockwell B60 (Medium)	ASTM A513	0000000	000000	000000	000000
3 1/2"	0" to 0.01"	2 1/2"	45,000	Stress Relieved	Rockwell B60 (Medium)	ASTM A513	0000000	00000	000000	000000
4"	0" to 0.011"	3"	45,000	Stress Relieved	Rockwell B60 (Medium)	ASTM A513	0000000	000000	000000	000000
5 1/2"	0" to 0.015"	4 1/2"	45,000	Stress Relieved	Rockwell B60 (Medium)	ASTM A513	0000000	000000	000000	000000

Metric Tubes

Yield Strength: 34,000 psi
Hardness: Brinell 100 (Soft)
Heat Treatable: No

1 mm Wall Thick. (Standard Tolerance)
OD, mm	OD Tolerance, mm	ID, mm		1 ft. Lg.	3 ft. Lg.	6 ft. Lg.
12	-0.08 to 0.08	10	0000000	00000	000000	000000
2 mm Wall Thick. (Standard Tolerance)
12	-0.08 to 0.08	8	00000000	0000	00000	00000
20	-0.08 to 0.08	16	0000000	00000	00000	00000
3 mm Wall Thick. (Standard Tolerance)
20	-0.08 to 0.08	14	00000000	00000	00000	00000
25	-0.08 to 0.08	19	0000000	00000	00000	00000
4 mm Wall Thick. (Standard Tolerance)
25	-0.08 to 0.08	17	00000000	00000	00000	00000
30	-0.08 to 0.08	22	0000000	00000	00000	000000

Low-Carbon Steel Rectangular Tubes

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

Tubes

Yield Strength: See table
Hardness: Not Rated
Heat Treatable: Yes
Max. Hardness After Heat Treatment: Not Rated
Specifications Met: See table

Outside				Inside
Ht.	Ht. Tolerance	Wd.	Wd. Tolerance	Ht.	Wd.	Yield Strength, psi	Specifications Met	Straightness Tolerance		1 ft. Lg.	3 ft. Lg.	6 ft. Lg.
0.049" Wall Thick. (-0.005" to 0.005" Tolerance)
1/2"	-0.004" to 0.004"	1/2"	-0.004" to 0.004"	0.402"	0.402"	Not Rated	ASTM A500	__	0000000	00	00000	00000
5/8"	-0.004" to 0.004"	5/8"	-0.004" to 0.004"	0.527"	0.527"	Not Rated	ASTM A500	__	0000000	00	0000	00000
3/4"	-0.005" to 0.005"	3/4"	-0.005" to 0.005"	0.652"	0.652"	Not Rated	ASTM A500	__	0000000	00	0000	00000
0.065" Wall Thick. (-0.007" to 0.007" Tolerance)
1/2"	-0.03" to 0.03"	1/2"	-0.03" to 0.03"	0.37"	0.37"	32,000	ASTM A513	1/16" per 3 ft.	00000000	00000	0000	0000
1/2"	-0.005" to 0.005"	1"	-0.005" to 0.005"	0.37"	0.87"	Not Rated	ASTM A500	__	0000000	00	0000	00000
5/8"	-0.004" to 0.004"	5/8"	-0.004" to 0.004"	0.495"	0.495"	Not Rated	ASTM A500	__	0000000	00	0000	00000
3/4"	-0.03" to 0.03"	3/4"	-0.03" to 0.03"	0.62"	0.62"	32,000	ASTM A513	1/16" per 3 ft.	00000000	0000	0000	00000
1"	-0.03" to 0.03"	1"	-0.03" to 0.03"	0.87"	0.87"	32,000	ASTM A513	1/16" per 3 ft.	00000000	0000	00000	00000
1"	-0.01" to 0.01"	3"	-0.01" to 0.01"	0.87"	2.87"	Not Rated	ASTM A500	__	0000000	00000	00000	00000
1"	-0.008" to 0.008"	2"	-0.008" to 0.008"	0.87"	1.87"	Not Rated	ASTM A500	__	0000000	0000	00000	00000
1"	-0.006" to 0.006"	1 1/2"	-0.006" to 0.006"	0.87"	1.37"	Not Rated	ASTM A500	__	0000000	0000	00000	00000
1 1/4"	-0.03" to 0.03"	1 1/4"	-0.03" to 0.03"	1.12"	1.12"	32,000	ASTM A513	1/16" per 3 ft.	00000000	0000	00000	00000
2"	-0.008" to 0.008"	2"	-0.008" to 0.008"	1.87"	1.87"	Not Rated	ASTM A500	__	0000000	00000	00000	00000
0.083" Wall Thick. (-0.008" to 0.008" Tolerance)
3/4"	-0.03" to 0.03"	3/4"	-0.03" to 0.03"	0.584"	0.584"	32,000	ASTM A513	1/16" per 3 ft.	00000000	0000	0000	00000
3/4"	-0.006" to 0.006"	1 1/2"	-0.006" to 0.006"	0.584"	1.334"	Not Rated	ASTM A500	__	000000	0000	00000	00000
1"	-0.03" to 0.03"	1"	-0.03" to 0.03"	0.834"	0.834"	32,000	ASTM A513	1/16" per 3 ft.	00000000	0000	00000	00000
1"	-0.01" to 0.01"	1 1/2"	-0.01" to 0.01"	0.834"	1.334"	Not Rated	ASTM A500	__	0000000	0000	00000	00000
1"	-0.01" to 0.01"	3"	-0.01" to 0.01"	0.834"	2.834"	Not Rated	ASTM A500	__	0000000	00000	00000	00000
1"	-0.008" to 0.008"	2"	-0.008" to 0.008"	0.834"	1.834"	Not Rated	ASTM A500	__	0000000	00000	00000	00000
1 1/4"	-0.006" to 0.006"	1 1/4"	-0.006" to 0.006"	1.084"	1.084"	Not Rated	ASTM A500	__	0000000	0000	00000	00000
1 1/2"	-0.03" to 0.03"	1 1/2"	-0.03" to 0.03"	1.334"	1.334"	32,000	ASTM A513	1/16" per 3 ft.	00000000	00000	00000	00000
2"	-0.03" to 0.03"	2"	-0.03" to 0.03"	1.834"	1.834"	32,000	ASTM A513	1/16" per 3 ft.	00000000	00000	00000	00000
2"	-0.02" to 0.02"	4"	-0.02" to 0.02"	1.834"	3.834"	Not Rated	ASTM A500	__	0000000	00000	00000	00000
2 1/2"	-0.01" to 0.01"	2 1/2"	-0.01" to 0.01"	2.334"	2.334"	Not Rated	ASTM A500	__	0000000	00000	00000	00000
0.12" Wall Thick. (-0.012" to 0.012" Tolerance)
3/4"	-0.005" to 0.005"	3/4"	-0.005" to 0.005"	0.51"	0.51"	Not Rated	ASTM A500	__	0000000	0000	0000	00000
1"	-0.03" to 0.03"	1"	-0.03" to 0.03"	0.76"	0.76"	46,000	ASTM A500	1/16" per 3 ft.	00000000	0000	00000	00000
1"	-0.008" to 0.008"	2"	-0.008" to 0.008"	0.76"	1.76"	Not Rated	ASTM A500	__	0000000	00000	00000	00000
1"	-0.006" to 0.006"	1 1/2"	-0.006" to 0.006"	0.76"	1.26"	Not Rated	ASTM A500	__	0000000	00000	00000	00000
1 1/4"	-0.006" to 0.006"	1 1/4"	-0.006" to 0.006"	1.01"	1.01"	Not Rated	ASTM A500	__	0000000	00000	00000	00000
1 1/2"	-0.03" to 0.03"	1 1/2"	-0.03" to 0.03"	1.26"	1.26"	32,000	ASTM A513	1/16" per 3 ft.	00000000	00000	00000	00000
2"	-0.03" to 0.03"	2"	-0.03" to 0.03"	1.76"	1.76"	46,000	ASTM A500	1/16" per 3 ft.	00000000	00000	00000	00000
1/8" Wall Thick. (-0.013" to 0.013" Tolerance)
1"	-0.025" to 0.025"	3"	-0.025" to 0.025"	3/4"	2 3/4"	46,000	ASTM A500	__	0000000	00000	00000	00000
1 1/2"	-0.025" to 0.025"	3"	-0.025" to 0.025"	1 1/4"	2 3/4"	46,000	ASTM A500	__	0000000	00000	00000	00000
2 1/2"	-0.03" to 0.03"	2 1/2"	-0.03" to 0.03"	2 1/4"	2 1/4"	46,000	ASTM A500	1/16" per 3 ft.	00000000	00000	00000	00000
3"	-0.03" to 0.03"	3"	-0.03" to 0.03"	2 3/4"	2 3/4"	46,000	ASTM A500	1/16" per 3 ft.	00000000	00000	00000	00000
3 1/2"	-0.03" to 0.03"	3 1/2"	-0.03" to 0.03"	3 1/4"	3 1/4"	46,000	ASTM A500	1/16" per 3 ft.	00000000	00000	00000	00000
4"	-0.03" to 0.03"	4"	-0.03" to 0.03"	3 3/4"	3 3/4"	46,000	ASTM A500	1/16" per 3 ft.	00000000	00000	00000	00000
0.188" Wall Thick. (-0.019" to 0.019" Tolerance)
1 1/4"	-0.02" to 0.02"	1 1/4"	-0.02" to 0.02"	0.874"	0.874"	46,000	ASTM A500	__	0000000	00000	00000	00000
1 1/2"	-0.025" to 0.025"	3"	-0.025" to 0.025"	1.124"	2.624"	46,000	ASTM A500	__	0000000	00000	00000	00000
2"	-0.03" to 0.03"	2"	-0.03" to 0.03"	1.624"	1.624"	46,000	ASTM A500	1/16" per 3 ft.	00000000	00000	00000	00000
2 1/2"	-0.02" to 0.02"	2 1/2"	-0.02" to 0.02"	2.124"	2.124"	46,000	ASTM A500	__	0000000	00000	00000	00000
3"	-0.03" to 0.03"	3"	-0.03" to 0.03"	2.624"	2.624"	46,000	ASTM A500	1/16" per 3 ft.	00000000	00000	00000	00000
4"	-0.03" to 0.03"	4"	-0.03" to 0.03"	3.624"	3.624"	46,000	ASTM A500	1/16" per 3 ft.	00000000	00000	00000	000000
1/4" Wall Thick. (-0.025" to 0.025" Tolerance)
1 1/2"	-0.025" to 0.025"	3"	-0.025" to 0.025"	1"	2 1/2"	46,000	ASTM A500	__	0000000	00000	00000	00000
2"	-0.03" to 0.03"	2"	-0.03" to 0.03"	1 1/2"	1 1/2"	46,000	ASTM A500	1/16" per 3 ft.	00000000	00000	00000	00000
2 1/2"	-0.02" to 0.02"	2 1/2"	-0.02" to 0.02"	2"	2"	46,000	ASTM A500	__	0000000	00000	00000	00000
3"	-0.03" to 0.03"	3"	-0.03" to 0.03"	2 1/2"	2 1/2"	46,000	ASTM A500	1/16" per 3 ft.	00000000	00000	00000	000000
4"	-0.03" to 0.03"	4"	-0.03" to 0.03"	3 1/2"	3 1/2"	46,000	ASTM A500	1/16" per 3 ft.	00000000	00000	00000	000000
6"	-0.06" to 0.06"	6"	-0.06" to 0.06"	5 1/2"	5 1/2"	46,000	ASTM A500	1/16" per 3 ft.	00000000	00000	000000	000000

Metric Tubes

Yield Strength: 34,000 psi
Hardness: Rockwell B65 (Medium)
Heat Treatable: Yes
Max. Hardness After Heat Treatment: Not Rated

Outside, mm				Inside, mm
Ht.	Ht. Tolerance	Wd.	Wd. Tolerance	Ht.	Wd.		1 ft. Lg.	3 ft. Lg.	6 ft. Lg.
1 mm Wall Thick. (-0.15 to 0.15 mm Tolerance)
12	-0.2 to 0.2	12	-0.2 to 0.2	10	10	0000000	00000	00000	000000
2 mm Wall Thick. (-0.1 to 0.1 mm Tolerance)
25	-0.3 to 0.3	50	-0.3 to 0.3	21	46	0000000	00000	00000	00000
25	-0.25 to 0.25	25	-0.25 to 0.25	21	21	0000000	00000	00000	00000
40	-0.3 to 0.3	40	-0.3 to 0.3	36	36	0000000	00000	00000	00000
55	-0.35 to 0.35	55	-0.35 to 0.35	51	51	0000000	00000	00000	000000
3 mm Wall Thick. (-0.1 to 0.1 mm Tolerance)
100	-0.65 to 0.65	100	-0.65 to 0.65	94	94	0000000	00000	000000	000000

Ultra-Strength Carbon Steel (AHSS) Round Tubes

Yield Strength: 100,000 psi
Hardness: Rockwell C26 (Hard)
Heat Treatable: No

The same steel used in automobile bodies, this AHSS (advanced high-strength steel) allows you to fabricate high-strength parts using thinner material than you could with other types of steel. It is formable, weldable, and more economical than alloy steel. It's sometimes called HSLA (high-strength low-alloy) steel.

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

0.049" Wall Thick. (-0.005" to 0.005" Tolerance)
OD	OD Tolerance	ID	Heat Treatment		1 ft. Lg.	3 ft. Lg.	6 ft. Lg.
5/8"	-0.01" to 0.01"	0.527"	Annealed (Softened)	00000000	000000	00	000000
0.058" Wall Thick. (-0.005" to 0.005" Tolerance)
5/8"	-0.01" to 0.01"	0.509"	Annealed (Softened)	00000000	00000	000000	00000
0.065" Wall Thick. (-0.005" to 0.005" Tolerance)
3/4"	-0.01" to 0.01"	0.62"	Annealed (Softened)	00000000	00000	00	00000
1"	-0.01" to 0.01"	0.87"	Annealed (Softened)	00000000	00000	00	00
0.095" Wall Thick. (-0.005" to 0.005" Tolerance)
1 3/4"	-0.01" to 0.01"	1.51"	Annealed (Softened)	00000000	00000	00000	000000

Weld-Together Framing and Fittings

Create strong structures by welding this framing together. Add metal panels to close off openings. Slide the rail into the fitting and weld in place.

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

Rails

Outside		Inside
Ht.	Wd.	Ht.	Wd.	Wall Thick.	Lg. Tolerance	Material		2 ft.	4 ft.	8 ft.	10 ft.
1 1/2"	1 1/2"	1 1/4"	1 1/4"	0.12"	-0.125" to +0.125"	Carbon Steel	000000	000000	000000	000000	0000000
2"	2"	1 5/8"	1 5/8"	3/16"	-0.125" to +0.125"	Carbon Steel	000000	00000	00000	000000	000000

Elbow Connectors


90° Elbow	Three-Way 90° Elbow
90° Elbow

	For Outside Rail		Outside		Inside			Lg.
Weld-Together Framing Component Shape	Ht.	Wd.	Ht.	Wd.	Ht.	Wd.	Wall Thick.	(A)	(B)	(C)	Yield Strength, psi	Material		Each
90° Elbow	1 1/2"	1 1/2"	1 13/16"	1 13/16"	1 9/16"	1 9/16"	0.121"	6"	6"	__	80,000	Carbon Steel	0000000	000000
90° Elbow	2"	2"	2 5/16"	2 5/16"	2 1/16"	2 1/16"	0.121"	6"	6"	__	80,000	Carbon Steel	0000000	00000
Three-Way 90° Elbow	1 1/2"	1 1/2"	1 13/16"	1 13/16"	1 9/16"	1 9/16"	0.121"	6"	6"	6"	80,000	Carbon Steel	0000000	00000
Three-Way 90° Elbow	2"	2"	2 5/16"	2 5/16"	2 1/16"	2 1/16"	0.121"	6"	6"	6"	80,000	Carbon Steel	0000000	00000

Straight Connectors

	For Outside Rail		Outside		Inside
Weld-Together Framing Component Shape	Ht.	Wd.	Ht.	Wd.	Ht.	Wd.	Wall Thick.	Lg. (A)	Yield Strength, psi	Material		Each
Straight	1 1/2"	1 1/2"	1 13/16"	1 13/16"	1 9/16"	1 9/16"	0.121"	4"	80,000	Carbon Steel	0000000	000000
Straight	2"	2"	2 5/16"	2 5/16"	2 1/16"	2 1/16"	0.121"	4"	80,000	Carbon Steel	0000000	00000

Tee Connectors

	For Outside Rail		Outside		Inside			Lg.
Weld-Together Framing Component Shape	Ht.	Wd.	Ht.	Wd.	Ht.	Wd.	Wall Thick.	(A)	(B)	Yield Strength, psi	Material		Each
Tee	1 1/2"	1 1/2"	1 13/16"	1 13/16"	1 9/16"	1 9/16"	0.121"	6"	6"	80,000	Carbon Steel	0000000	000000
Tee	2"	2"	2 5/16"	2 5/16"	2 1/16"	2 1/16"	0.121"	6"	6 1/8"	80,000	Carbon Steel	0000000	00000

Cross Connectors

Cross

Five-Way Cross

	For Outside Rail		Outside		Inside			Lg.
Weld-Together Framing Component Shape	Ht.	Wd.	Ht.	Wd.	Ht.	Wd.	Wall Thick.	(A)	(B)	(D)	Yield Strength, psi	Material		Each
Cross	1 1/2"	1 1/2"	1 13/16"	1 13/16"	1 9/16"	1 9/16"	0.121"	8 3/16"	8 3/16"	__	80,000	Carbon Steel	0000000	000000
Cross	2"	2"	2 5/16"	2 5/16"	2 1/16"	2 1/16"	0.121"	9 11/16"	9 11/16"	__	80,000	Carbon Steel	0000000	00000
Five-Way Cross	1 1/2"	1 1/2"	1 13/16"	1 13/16"	1 9/16"	1 9/16"	0.121"	8 3/16"	8 3/16"	3 3/16"	80,000	Carbon Steel	0000000	00000
Five-Way Cross	2"	2"	2 5/16"	2 5/16"	2 1/16"	2 1/16"	0.121"	9 11/16"	9 11/16"	3 11/16"	80,000	Carbon Steel	0000000	00000

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

Low-Carbon Steel Round Tubes

Low-Carbon Steel Rectangular Tubes

Ultra-Strength Carbon Steel (AHSS) Round Tubes

Weld-Together Framing and Fittings