C3 Channels | McMaster-Carr

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2 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.

Low-Carbon Steel U-Channels

C-Channel

Yield Strength: 36,000 psi
Hardness: Not Rated
Heat Treatable: Yes
Max. Hardness After Heat Treatment: Not Rated
Fabrication: Hot Rolled
Specifications Met: ASTM A36

Also known as mild steel, low-carbon steel is easy to machine, form, and weld. It can also be surface-hardened with heat treatment. These U-channels are manufactured to meet ASTM A36 standards for performance and quality.

C-channels are stronger than U-channels. They have thicker legs, and their tapered design distributes loads more evenly. They’re often used for structural purposes, such as frames and supports.

The U-channel trade number indicates the channel’s outside width and weight in lbs./ft. This gives you an easy reference for selecting the right size and strength for your needs.

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

Outside			Inside		Thickness		Corner Shape
Wd.	Ht.	U-Channel Trade Number	Wd.	Ht.	Leg	Base	Outside	Inside		1 ft. Lg.	2 ft. Lg.	3 ft. Lg.	4 ft. Lg.	6 ft. Lg.	8 ft. Lg.	10 ft. Lg.
C-Channel
3"	1.41"	C3×4.1	2.66"	1.24"	0.17"	0.17"	Square	Round	0000000	000000	000000	000000	000000	000000	000000	000000

Zinc-Galvanized Low-Carbon Steel U-Channels

C-Channel

Yield Strength: 36,000 psi
Hardness: Not Rated
Heat Treatable: Yes
Max. Hardness After Heat Treatment: Not Rated
Fabrication: Hot Rolled
Specifications Met: ASTM A36

These U-channels are zinc galvanized for good corrosion resistance. Also known as mild steel, low-carbon steel is easy to machine and form. All have been manufactured to meet ASTM A36 standards for quality and performance.

C-channels are stronger than U-channels. They have thicker legs, and their tapered design distributes loads more evenly. They’re often used for structural purposes such as frames and supports.

The U-channel trade number indicates the channel’s outside width and weight in lbs./ft. This gives you an easy reference for selecting the right size and strength for your needs.

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

Outside			Inside		Thickness			Corner Shape
Wd.	Ht.	U-Channel Trade Number	Ht.	Wd.	Leg	Base	Finish Thick., microns	Outside	Inside		1 ft. Lg.	3 ft. Lg.	6 ft. Lg.
C-Channel
3"	1.41"	C3×4.1	1.24"	2.66"	0.17"	0.17"	75	Square	Round	0000000	000000	000000	000000