Triangular Steel | McMaster-Carr

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Length

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Steel Grade

1008-1010 Low-Carbon Steel

Hardness Rating

Specifications Met

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Tolerance Rating

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Fabrication

Certificate Type

Material Certificate with Traceable Lot Number

Maximum Hardness After Heat Treatment

Rockwell C60

Not Rated

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RoHS

Maximum Temperature

Heat Treatable

DFARS Specialty Metals

Compliant

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REACH

Compliant

Yield Strength

30,000 psi to 39,999 psi

40,000 psi to 99,999 psi

Heat Treatment

Annealed

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24 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 Triangles

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

Weld these steel triangles to strengthen joints in structural applications. They’re also known as gussets. They have clipped corners that leave room for a weld bead, allowing for stronger welds. These triangles are made of low-carbon steel, which is easy to machine, form, and weld. All meet ASTM material standards for steel.

Physical and mechanical properties are not guaranteed. They are intended only as a basis for comparison and not for design purposes.

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

4" × 4"
Thick.	Thick. Tolerance	Yield Strength, psi	Hardness	Specifications Met	Pkg. Qty.		Pkg.
1/8"	-0.003" to 0.003"	30,000	Rockwell B40 (Soft)	ASTM A1011	2	0000000	00000
3/16"	-0.008" to 0.008"	36,000	Rockwell B65 (Soft)	ASTM A36	2	0000000	00000
1/4"	-0.008" to 0.008"	36,000	Rockwell B65 (Soft)	ASTM A36	1	0000000	00000
6" × 6"
1/8"	-0.003" to 0.003"	30,000	Rockwell B40 (Soft)	ASTM A1011	2	0000000	00000
3/16"	-0.008" to 0.008"	36,000	Rockwell B65 (Soft)	ASTM A36	1	0000000	0000
1/4"	-0.008" to 0.008"	36,000	Rockwell B65 (Soft)	ASTM A36	1	0000000	0000
8" × 8"
1/8"	-0.003" to 0.003"	30,000	Rockwell B40 (Soft)	ASTM A1011	2	0000000	00000
3/16"	-0.008" to 0.008"	36,000	Rockwell B65 (Soft)	ASTM A36	1	0000000	00000
1/4"	-0.008" to 0.008"	36,000	Rockwell B65 (Soft)	ASTM A36	1	0000000	00000
12" × 12"
1/8"	-0.003" to 0.003"	30,000	Rockwell B40 (Soft)	ASTM A1011	1	0000000	00000
3/16"	-0.008" to 0.008"	36,000	Rockwell B65 (Soft)	ASTM A36	1	0000000	00000
1/4"	-0.008" to 0.008"	36,000	Rockwell B65 (Soft)	ASTM A36	1	0000000	00000

Easy-to-Weld 4130 Alloy Steel Triangles

Yield Strength: 50,000 psi
Hardness: Rockwell B85 (Medium)
Heat Treatable: Yes
Max. Hardness After Heat Treatment: Rockwell C60
Fabrication: See table
Specifications Met: SAE AMS6350, SAE AMS6351

Weld these alloy steel triangles to strengthen joints in structural applications. They're also known as gussets. They have clipped corners that leave room for a weld bead, so you can make stronger welds. Made from 4130 alloy steel, also known as chrome-moly steel, these triangles have low carbon content for good weldability. To increase their wear resistance, you can harden them with heat treating. They have been manufactured to meet SAE 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.

4" × 4"
Thick.	Thick. Tolerance	Fabrication	Heat Treatment	Pkg. Qty.		Pkg.
1/8"	-0.009" to 0.009"	Cold Rolled	Annealed (Softened)	2	0000000	000000
3/16"	-0.009" to 0.009"	Hot Rolled	Annealed (Softened)	1	0000000	00000
1/4"	-0.009" to 0.009"	Hot Rolled	Annealed (Softened)	1	0000000	00000
6" × 6"
1/8"	-0.009" to 0.009"	Cold Rolled	Annealed (Softened)	1	0000000	00000
3/16"	-0.009" to 0.009"	Hot Rolled	Annealed (Softened)	1	0000000	00000
1/4"	-0.009" to 0.009"	Hot Rolled	Annealed (Softened)	1	0000000	00000
8" × 8"
1/8"	-0.009" to 0.009"	Cold Rolled	Annealed (Softened)	1	0000000	00000
3/16"	-0.009" to 0.009"	Hot Rolled	Annealed (Softened)	1	0000000	00000
1/4"	-0.009" to 0.009"	Hot Rolled	Annealed (Softened)	1	0000000	00000
12" × 12"
1/8"	-0.009" to 0.009"	Cold Rolled	Annealed (Softened)	1	0000000	00000
3/16"	-0.009" to 0.009"	Hot Rolled	Annealed (Softened)	1	0000000	00000
1/4"	-0.009" to 0.009"	Hot Rolled	Annealed (Softened)	1	0000000	00000