ASTM A322 Steel | McMaster-Carr

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Tolerance Rating

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40,000 psi to 99,999 psi

100,000 psi to 199,999 psi

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System of Measurement

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Specifications Met

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IEC 60404-8-8

ISO Standard

OSHA Compliant 29 CFR 1926.701

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Export Control Classification Number (ECCN)

EAR99

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Material Certificate with Traceable Lot Number

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260 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.

Tight-Tolerance Hardened Multipurpose 4140 Alloy Steel Sheets and Bars

Also known as flat stock, the thickness on these sheets and bars is held to a tight tolerance. They are hardened for increased abrasion and impact resistance. Made from versatile alloy steel, also known as chrome-moly steel, these sheets and bars resist fracturing from repeated stress. They’re used for a wide range of parts, including molds and structural supports. They’ve been manufactured to meet ASTM standards for quality and performance.

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

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

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

Sheets

Yield Strength: 121,000 psi
Hardness: Rockwell C27 (Hard)
Fabrication: Hot Rolled
Specifications Met: ASTM A29, ASTM A322

3" × 3"
Thick.	Thick. Tolerance	Mechanical Finish		Each
1/8"	-0.001" to 0.001"	Precision Ground	0000000	000000
3/16"	-0.001" to 0.001"	Precision Ground	0000000	00000
1/4"	-0.001" to 0.001"	Precision Ground	0000000	00000
3/8"	-0.001" to 0.001"	Precision Ground	0000000	00000
1/2"	-0.001" to 0.001"	Precision Ground	0000000	00000
5/8"	-0.001" to 0.001"	Precision Ground	0000000	00000
3/4"	-0.001" to 0.001"	Precision Ground	0000000	00000
1"	-0.001" to 0.001"	Precision Ground	0000000	00000
1 1/4"	-0.001" to 0.001"	Precision Ground	0000000	00000
1 1/2"	-0.002" to 0.002"	Precision Ground	0000000	000000
6" × 6"
1/16"	-0.001" to 0.001"	Precision Ground	00000000	00000
3/32"	-0.001" to 0.001"	Precision Ground	00000000	00000
1/8"	-0.001" to 0.001"	Precision Ground	0000000	00000
3/16"	-0.001" to 0.001"	Precision Ground	0000000	00000
1/4"	-0.001" to 0.001"	Precision Ground	0000000	000000
5/16"	-0.001" to 0.001"	Precision Ground	00000000	00000
3/8"	-0.001" to 0.001"	Precision Ground	0000000	000000
1/2"	-0.001" to 0.001"	Precision Ground	0000000	000000
9/16"	-0.001" to 0.001"	Precision Ground	00000000	000000
5/8"	-0.001" to 0.001"	Precision Ground	0000000	000000
3/4"	-0.001" to 0.001"	Precision Ground	0000000	000000
1"	-0.001" to 0.001"	Precision Ground	0000000	000000
1 1/4"	-0.001" to 0.001"	Precision Ground	0000000	000000
1 1/2"	-0.002" to 0.002"	Precision Ground	0000000	000000
2"	-0.001" to 0.001"	Precision Ground	00000000	000000
6" × 12"
1/8"	-0.001" to 0.001"	Precision Ground	0000000	000000
3/16"	-0.001" to 0.001"	Precision Ground	0000000	000000
1/4"	-0.001" to 0.001"	Precision Ground	0000000	000000
3/8"	-0.001" to 0.001"	Precision Ground	0000000	000000
1/2"	-0.001" to 0.001"	Precision Ground	0000000	000000
5/8"	-0.001" to 0.001"	Precision Ground	0000000	000000
3/4"	-0.001" to 0.001"	Precision Ground	0000000	000000
1"	-0.001" to 0.001"	Precision Ground	0000000	000000
1 1/4"	-0.001" to 0.001"	Precision Ground	0000000	000000
1 1/2"	-0.002" to 0.002"	Precision Ground	0000000	000000
12" × 12"
1/16"	-0.001" to 0.001"	Precision Ground	00000000	000000
3/32"	-0.001" to 0.001"	Precision Ground	00000000	000000
1/8"	-0.001" to 0.001"	Precision Ground	0000000	000000
3/16"	-0.001" to 0.001"	Precision Ground	0000000	000000
1/4"	-0.001" to 0.001"	Precision Ground	0000000	000000
5/16"	-0.001" to 0.001"	Precision Ground	00000000	000000
3/8"	-0.001" to 0.001"	Precision Ground	0000000	000000
1/2"	-0.001" to 0.001"	Precision Ground	0000000	000000
9/16"	-0.001" to 0.001"	Precision Ground	00000000	000000
5/8"	-0.001" to 0.001"	Precision Ground	0000000	000000
3/4"	-0.001" to 0.001"	Precision Ground	0000000	000000
1"	-0.001" to 0.001"	Precision Ground	0000000	000000
1 1/4"	-0.001" to 0.001"	Precision Ground	0000000	000000
1 1/2"	-0.002" to 0.002"	Precision Ground	0000000	00000000
12" × 24"
1/8"	-0.001" to 0.001"	Precision Ground	0000000	000000
3/16"	-0.001" to 0.001"	Precision Ground	0000000	000000
1/4"	-0.001" to 0.001"	Precision Ground	0000000	000000
3/8"	-0.001" to 0.001"	Precision Ground	0000000	000000
1/2"	-0.001" to 0.001"	Precision Ground	0000000	000000
5/8"	-0.001" to 0.001"	Precision Ground	0000000	000000
3/4"	-0.001" to 0.001"	Precision Ground	0000000	000000
1"	-0.001" to 0.001"	Precision Ground	0000000	00000000
1 1/4"	-0.001" to 0.001"	Precision Ground	0000000	00000000
1 1/2"	-0.002" to 0.002"	Precision Ground	0000000	00000000
12" × 36"
1/16"	-0.001" to 0.001"	Precision Ground	00000000	000000
3/32"	-0.001" to 0.001"	Precision Ground	00000000	000000
1/8"	-0.001" to 0.001"	Precision Ground	0000000	000000
3/16"	-0.001" to 0.001"	Precision Ground	0000000	000000
1/4"	-0.001" to 0.001"	Precision Ground	0000000	000000
5/16"	-0.001" to 0.001"	Precision Ground	00000000	000000
3/8"	-0.001" to 0.001"	Precision Ground	0000000	000000
1/2"	-0.001" to 0.001"	Precision Ground	0000000	000000
9/16"	-0.001" to 0.001"	Precision Ground	00000000	000000
5/8"	-0.001" to 0.001"	Precision Ground	0000000	00000000
3/4"	-0.001" to 0.001"	Precision Ground	0000000	00000000
1"	-0.001" to 0.001"	Precision Ground	0000000	00000000
1 1/4"	-0.001" to 0.001"	Precision Ground	0000000	00000000
1 1/2"	-0.002" to 0.002"	Precision Ground	0000000	00000000
24" × 48"
1/8"	-0.001" to 0.001"	Precision Ground	00000000	00000000
1/2"	-0.001" to 0.001"	Precision Ground	00000000	00000000

Bars

Yield Strength: 121,000 psi
Hardness: Rockwell C27 (Hard)
Fabrication: Hot Rolled
Specifications Met: ASTM A29, ASTM A322

1/16" Thick.
Wd.	Thick. Tolerance	Mechanical Finish		1/2 ft. Lg.	1 ft. Lg.	1 1/2 ft. Lg.	3 ft. Lg.	4 ft. Lg.	6 ft. Lg.	8 ft. Lg.
1"	-0.002" to 0.002"	Precision Ground	00000000	00	000000	00	000000	00	0000000	00
2"	-0.002" to 0.002"	Precision Ground	00000000	00	00000	00	00000	00	000000	00
3/32" Thick.
1/2"	-0.002" to 0.002"	Precision Ground	00000000	000000	00000	000000	00000	00	000000	00
3/4"	-0.002" to 0.002"	Precision Ground	00000000	00000	00000	00000	00000	00	000000	00
1"	-0.002" to 0.002"	Precision Ground	00000000	00000	00000	00000	00000	00	000000	00
1 1/2"	-0.002" to 0.002"	Precision Ground	00000000	00000	00000	00000	00000	00	000000	00
2"	-0.002" to 0.002"	Precision Ground	00000000	00000	00000	00000	00000	00	000000	00
3"	-0.002" to 0.002"	Precision Ground	00000000	00000	00000	00000	000000	00	000000	00
4"	-0.002" to 0.002"	Precision Ground	00000000	00000	00000	00000	000000	00	000000	00
1/8" Thick.
1/8"	-0.002" to 0.002"	Precision Ground	00000000	00000	00000	00000	00000	00	00000	00
1/4"	-0.002" to 0.002"	Precision Ground	00000000	00000	00000	00000	00000	00	000000	00
3/8"	-0.002" to 0.002"	Precision Ground	00000000	00000	00000	00000	00000	00	000000	00
1/2"	-0.002" to 0.002"	Precision Ground	0000000	00000	00000	00000	00000	00	000000	00
3/4"	-0.002" to 0.002"	Precision Ground	0000000	00000	00000	00000	00000	00	000000	00
1"	-0.002" to 0.002"	Precision Ground	0000000	00000	00000	00000	00000	00	000000	00
1 1/4"	-0.002" to 0.002"	Precision Ground	0000000	00000	00000	00000	00000	00	000000	00
1 1/2"	-0.002" to 0.002"	Precision Ground	0000000	00000	00000	00000	00000	00	000000	00
2"	-0.002" to 0.002"	Precision Ground	0000000	00000	00000	00000	000000	00	000000	00
2 1/2"	-0.002" to 0.002"	Precision Ground	0000000	00000	00000	00000	000000	00	000000	00
3"	-0.002" to 0.002"	Precision Ground	0000000	00000	00000	00000	000000	00	000000	00
4"	-0.002" to 0.002"	Precision Ground	0000000	00000	00000	00000	000000	00	000000	00
5"	-0.002" to 0.002"	Precision Ground	0000000	00000	00000	000000	000000	00	000000	00
6"	-0.002" to 0.002"	Precision Ground	0000000	00	00	000000	000000	00	000000	00
3/16" Thick.
3/16"	-0.002" to 0.002"	Precision Ground	0000000	00000	00000	00000	00000	00	000000	00
3/8"	-0.002" to 0.002"	Precision Ground	00000000	00000	00000	00000	00000	00	000000	00
1/2"	-0.002" to 0.002"	Precision Ground	0000000	00000	00000	00000	00000	00	000000	00
3/4"	-0.002" to 0.002"	Precision Ground	0000000	00000	00000	00000	00000	00	000000	00
1"	-0.002" to 0.002"	Precision Ground	0000000	00000	00000	00000	00000	00	000000	0000000
1 1/4"	-0.002" to 0.002"	Precision Ground	0000000	00000	00000	00000	00000	00	000000	00
1 1/2"	-0.002" to 0.002"	Precision Ground	0000000	00000	00000	00000	00000	00	000000	00
2"	-0.002" to 0.002"	Precision Ground	0000000	00000	00000	00000	000000	00	000000	00
2 1/2"	-0.002" to 0.002"	Precision Ground	0000000	00000	00000	00000	000000	00	000000	00
3"	-0.002" to 0.002"	Precision Ground	0000000	00000	00000	00000	000000	00	000000	00
4"	-0.002" to 0.002"	Precision Ground	0000000	00000	00000	000000	000000	00	000000	00
5"	-0.002" to 0.002"	Precision Ground	0000000	00000	000000	000000	000000	00	000000	00
6"	-0.002" to 0.002"	Precision Ground	0000000	00	00	000000	000000	00	00	00
1/4" Thick.
1/4"	-0.002" to 0.002"	Precision Ground	0000000	00000	00000	00000	00000	00	000000	00
3/8"	-0.002" to 0.002"	Precision Ground	00000000	00000	00000	00000	00000	00	000000	00
1/2"	-0.002" to 0.002"	Precision Ground	0000000	00000	00000	00000	00000	000000	000000	000000
5/8"	-0.002" to 0.002"	Precision Ground	00000000	00	00000	00	00000	00	000000	00
3/4"	-0.002" to 0.002"	Precision Ground	0000000	00000	00000	00000	00000	000000	000000	000000
1"	-0.002" to 0.002"	Precision Ground	0000000	00000	00000	00000	00000	000000	000000	000000
1 1/4"	-0.002" to 0.002"	Precision Ground	0000000	00000	00000	00000	00000	000000	000000	000000
1 1/2"	-0.002" to 0.002"	Precision Ground	0000000	00000	00000	00000	00000	000000	000000	000000
2"	-0.002" to 0.002"	Precision Ground	0000000	00000	00000	00000	000000	000000	000000	000000
2 1/2"	-0.002" to 0.002"	Precision Ground	0000000	00000	00000	00000	000000	00	000000	00
3"	-0.002" to 0.002"	Precision Ground	0000000	00000	00000	00000	000000	00	000000	00
4"	-0.002" to 0.002"	Precision Ground	0000000	00000	00000	000000	000000	00	000000	00
5"	-0.002" to 0.002"	Precision Ground	0000000	00000	000000	000000	000000	00	000000	00
6"	-0.002" to 0.002"	Precision Ground	0000000	00	00	000000	000000	00	000000	00
8"	-0.002" to 0.002"	Precision Ground	0000000	00000	000000	000000	000000	00	000000	00
10"	-0.002" to 0.002"	Precision Ground	0000000	000000	000000	000000	000000	00	000000	00
5/16" Thick.
5/16"	-0.002" to 0.002"	Precision Ground	000000	00000	00000	00000	00000	00	000000	00
1/2"	-0.002" to 0.002"	Precision Ground	000000	00000	00000	00000	00000	00	000000	00
3/4"	-0.002" to 0.002"	Precision Ground	000000	00000	00000	00000	00000	00	000000	00
1"	-0.002" to 0.002"	Precision Ground	000000	00000	00000	00000	00000	00	000000	00
1 1/4"	-0.002" to 0.002"	Precision Ground	000000	00000	00000	00000	00000	00	000000	00
1 1/2"	-0.002" to 0.002"	Precision Ground	000000	00000	00000	00000	000000	00	000000	00
2"	-0.002" to 0.002"	Precision Ground	000000	00000	00000	00000	000000	00	000000	00
2 1/2"	-0.002" to 0.002"	Precision Ground	0000000	00000	00000	00000	000000	00	000000	00
3"	-0.002" to 0.002"	Precision Ground	0000000	00000	00000	000000	000000	00	000000	00
4"	-0.002" to 0.002"	Precision Ground	0000000	00000	00000	000000	000000	00	000000	00
5"	-0.002" to 0.002"	Precision Ground	0000000	00000	000000	000000	000000	00	000000	00
6"	-0.002" to 0.002"	Precision Ground	0000000	00000	000000	000000	000000	00	000000	00
8"	-0.002" to 0.002"	Precision Ground	0000000	00000	000000	000000	000000	00	000000	00
10"	-0.002" to 0.002"	Precision Ground	00000000	000000	000000	000000	000000	00	000000	00
3/8" Thick.
3/8"	-0.002" to 0.002"	Precision Ground	0000000	00000	00000	00000	00000	00	000000	00
1/2"	-0.002" to 0.002"	Precision Ground	0000000	00000	00000	00000	00000	000000	000000	000000
5/8"	-0.002" to 0.002"	Precision Ground	00000000	00	00000	00	00000	00	000000	00
3/4"	-0.002" to 0.002"	Precision Ground	0000000	00000	00000	00000	00000	000000	000000	000000
1"	-0.002" to 0.002"	Precision Ground	0000000	00000	00000	00000	000000	00	000000	00
1 1/4"	-0.002" to 0.002"	Precision Ground	0000000	00000	00000	00000	000000	00	000000	00
1 1/2"	-0.002" to 0.002"	Precision Ground	0000000	00000	00000	00000	000000	00	000000	00
2"	-0.002" to 0.002"	Precision Ground	0000000	00000	00000	00000	000000	00	000000	00
2 1/2"	-0.002" to 0.002"	Precision Ground	0000000	00000	00000	00000	000000	00	000000	00
3"	-0.002" to 0.002"	Precision Ground	0000000	00000	00000	000000	000000	00	000000	00
4"	-0.002" to 0.002"	Precision Ground	0000000	00000	000000	000000	000000	00	000000	00
5"	-0.002" to 0.002"	Precision Ground	0000000	00000	000000	000000	000000	00	000000	00
6"	-0.002" to 0.002"	Precision Ground	0000000	00	00	000000	000000	00	000000	00
8"	-0.002" to 0.002"	Precision Ground	00000000	000000	000000	000000	000000	00	000000	00
10"	-0.002" to 0.002"	Precision Ground	00000000	000000	000000	000000	000000	00	00000000	00
1/2" Thick.
1/2"	-0.002" to 0.002"	Precision Ground	0000000	00000	00000	00000	00000	000000	000000	000000
5/8"	-0.002" to 0.002"	Precision Ground	00000000	00	00000	00	00000	00	000000	00
3/4"	-0.002" to 0.002"	Precision Ground	0000000	00000	00000	00000	00000	000000	000000	000000
1"	-0.002" to 0.002"	Precision Ground	0000000	00000	00000	00000	000000	000000	000000	000000
1 1/4"	-0.002" to 0.002"	Precision Ground	0000000	00000	00000	00000	000000	00	000000	00
1 1/2"	-0.002" to 0.002"	Precision Ground	0000000	00000	00000	00000	000000	00	000000	00
1 3/4"	-0.002" to 0.002"	Precision Ground	00000000	00	00000	00	000000	00	000000	00
2"	-0.002" to 0.002"	Precision Ground	0000000	00000	00000	00000	000000	000000	000000	000000
2 1/2"	-0.002" to 0.002"	Precision Ground	0000000	00000	00000	000000	000000	00	000000	00
3"	-0.002" to 0.002"	Precision Ground	0000000	00000	00000	000000	000000	00	000000	00
3 1/2"	-0.002" to 0.002"	Precision Ground	00000000	00	000000	00	00	00	00	00
4"	-0.002" to 0.002"	Precision Ground	0000000	00000	000000	000000	000000	00	000000	00
5"	-0.002" to 0.002"	Precision Ground	0000000	00000	000000	000000	000000	00	000000	00
6"	-0.002" to 0.002"	Precision Ground	0000000	00	000000	000000	000000	00	000000	00
8"	-0.002" to 0.002"	Precision Ground	00000000	000000	000000	000000	000000	00	000000	00
10"	-0.002" to 0.002"	Precision Ground	00000000	000000	000000	000000	000000	00	00000000	00
5/8" Thick.
5/8"	-0.002" to 0.002"	Precision Ground	00000000	00000	00000	00000	000000	00	000000	00
3/4"	-0.002" to 0.002"	Precision Ground	00000000	00000	00000	00000	000000	00	000000	00
1"	-0.002" to 0.002"	Precision Ground	00000000	00000	00000	00000	000000	00	000000	00
1 1/4"	-0.002" to 0.002"	Precision Ground	00000000	00	00000	00	000000	00	000000	00
1 1/2"	-0.002" to 0.002"	Precision Ground	00000000	00000	00000	000000	000000	00	000000	00
2"	-0.002" to 0.002"	Precision Ground	00000000	00000	00000	000000	000000	00	000000	00
2 1/2"	-0.002" to 0.002"	Precision Ground	00000000	00	00000	00	000000	00	000000	00
3"	-0.002" to 0.002"	Precision Ground	00000000	00000	000000	000000	000000	00	000000	00
4"	-0.002" to 0.002"	Precision Ground	00000000	00000	000000	000000	000000	00	000000	00
6"	-0.002" to 0.002"	Precision Ground	00000000	00	00	000000	000000	00	000000	00
8"	-0.002" to 0.002"	Precision Ground	00000000	000000	000000	000000	000000	00	000000	00
10"	-0.002" to 0.002"	Precision Ground	00000000	000000	000000	000000	000000	00	00000000	00
3/4" Thick.
3/4"	-0.002" to 0.002"	Precision Ground	0000000	00000	00000	00000	000000	000000	000000	000000
1"	-0.002" to 0.002"	Precision Ground	0000000	00000	00000	00000	000000	000000	000000	000000
1 1/4"	-0.002" to 0.002"	Precision Ground	00000000	00	00000	00	000000	00	000000	00
1 1/2"	-0.002" to 0.002"	Precision Ground	0000000	00000	00000	000000	000000	00	000000	00
1 3/4"	-0.002" to 0.002"	Precision Ground	00000000	00	00000	00	000000	00	000000	00
2"	-0.002" to 0.002"	Precision Ground	0000000	00000	00000	000000	000000	00	000000	00
2 1/2"	-0.002" to 0.002"	Precision Ground	00000000	00	000000	00	00	00	00	00
3"	-0.002" to 0.002"	Precision Ground	0000000	00000	000000	000000	000000	00	000000	00
3 1/2"	-0.002" to 0.002"	Precision Ground	00000000	00	000000	00	00	00	00	00
4"	-0.002" to 0.002"	Precision Ground	0000000	00000	000000	000000	000000	00	000000	00
6"	-0.002" to 0.002"	Precision Ground	0000000	00	00	000000	000000	00	000000	00
8"	-0.002" to 0.002"	Precision Ground	00000000	000000	000000	000000	000000	00	00000000	00
10"	-0.002" to 0.002"	Precision Ground	00000000	000000	000000	000000	000000	00	00000000	00
1" Thick.
1"	-0.002" to 0.002"	Precision Ground	00000000	00000	00000	000000	000000	00	000000	00
1 1/4"	-0.002" to 0.002"	Precision Ground	00000000	00000	000000	000000	000000	00	000000	00
1 1/2"	-0.002" to 0.002"	Precision Ground	00000000	00000	000000	000000	000000	00	000000	00
1 3/4"	-0.002" to 0.002"	Precision Ground	00000000	00	000000	00	00	00	00	00
2"	-0.002" to 0.002"	Precision Ground	00000000	00000	000000	000000	000000	00	000000	00
2 1/2"	-0.002" to 0.002"	Precision Ground	00000000	00000	000000	000000	000000	00	000000	00
3"	-0.002" to 0.002"	Precision Ground	00000000	00000	000000	000000	000000	00	000000	00
3 1/2"	-0.002" to 0.002"	Precision Ground	00000000	00	000000	00	00	00	00	00
4"	-0.002" to 0.002"	Precision Ground	00000000	000000	000000	000000	000000	00	000000	00
5"	-0.002" to 0.002"	Precision Ground	00000000	00	000000	00	00	00	00	00
6"	-0.002" to 0.002"	Precision Ground	00000000	00	000000	000000	000000	00	00000000	00
8"	-0.002" to 0.002"	Precision Ground	00000000	000000	000000	000000	000000	00	00000000	00
10"	-0.002" to 0.002"	Precision Ground	00000000	000000	000000	000000	000000	00	00000000	00
1 1/4" Thick.
1 1/4"	-0.002" to 0.002"	Precision Ground	00000000	00	000000	00	00	00	00	00
2"	-0.002" to 0.002"	Precision Ground	00000000	00	000000	00	00	00	00	00
1 1/2" Thick.
1 1/2"	-0.002" to 0.002"	Precision Ground	00000000	000000	000000	000000	000000	00	000000	00
2"	-0.002" to 0.002"	Precision Ground	00000000	000000	000000	000000	000000	00	000000	00
4"	-0.002" to 0.002"	Precision Ground	00000000	000000	000000	000000	000000	00	00000000	00
2" Thick.
2"	-0.002" to 0.002"	Precision Ground	00000000	000000	000000	000000	000000	00	00000000	00
4"	-0.002" to 0.002"	Precision Ground	00000000	000000	000000	000000	000000	00	00000000	00

Thick.	Thick. Tolerance	Wd.	Lg.	Mechanical Finish		Each
1"	-0.002" to 0.002"	2 1/2"	3"	Precision Ground	000000000	000000
1 1/2"	-0.002" to 0.002"	2"	3"	Precision Ground	00000000	00000
2"	-0.002" to 0.002"	2"	3"	Precision Ground	000000000	00000
2"	-0.002" to 0.002"	3"	3"	Precision Ground	000000000	000000
2"	-0.002" to 0.002"	4"	3"	Precision Ground	000000000	000000
3"	-0.002" to 0.002"	3"	3"	Precision Ground	000000000	000000
3"	-0.002" to 0.002"	3"	6"	Precision Ground	00000000	000000

Hardened Multipurpose 4140 Alloy Steel Bars

Yield Strength: 93,000 psi
Hardness: Rockwell C30 (Hard)
Fabrication: Hot Rolled
Specifications Met: ASTM A322

The surface of these bars is hardened to increase their resistance to impacts and abrasion. Also known as chrome-moly steel, which is used to create molds, structural supports, and other parts. It resists fracturing from repeated stress. These bars have been manufactured to meet ASTM standards for quality and performance.

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

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

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

1/8" Thick.
Wd.	Thick. Tolerance	Mechanical Finish		1 1/2 ft. Lg.	3 ft. Lg.
1/2"	0.01" to 0.015"	Ground	0000000	000000	000000
3/4"	0.01" to 0.015"	Ground	0000000	00000	00000
1"	0.01" to 0.015"	Ground	0000000	00000	00000
1 1/4"	0.01" to 0.015"	Ground	0000000	00000	00000
1 1/2"	0.01" to 0.015"	Ground	0000000	00000	00000
2"	0.01" to 0.015"	Ground	0000000	00000	00000
1/4" Thick.
1/2"	0.01" to 0.015"	Ground	0000000	00000	00000
3/4"	0.01" to 0.015"	Ground	0000000	00000	00000
1"	0.01" to 0.015"	Ground	0000000	00000	00000
1 1/2"	0.01" to 0.015"	Ground	0000000	00000	00000
2"	0.01" to 0.015"	Ground	0000000	00000	00000
3"	0.01" to 0.015"	Ground	0000000	00000	000000
6"	0.01" to 0.015"	Ground	0000000	000000	000000
1/2" Thick.
1/2"	0.01" to 0.015"	Ground	0000000	00000	00000
3/4"	0.01" to 0.015"	Ground	0000000	00000	00000
1"	0.01" to 0.015"	Ground	0000000	00000	00000
1 1/2"	0.01" to 0.015"	Ground	0000000	00000	000000
2"	0.01" to 0.015"	Ground	0000000	00000	000000
3"	0.01" to 0.015"	Ground	0000000	00000	000000
6"	0.01" to 0.015"	Ground	0000000	000000	000000

Multipurpose 4140 Alloy Steel Rods and Discs

Also known as chrome-moly steel, this versatile alloy steel is used for a wide range of parts, such as gears, axles, shafts, collets, and die holders. It resists fracturing from repeated stress. For added wear resistance, the surface can be hardened with heat treating. These rods and discs have been manufactured to meet ASTM standards for quality and performance.

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

Hot-rolled steel rods have lower yield strength than cold-worked rods, so they’re easier to shape. They have a rougher surface finish than cold-worked rods, so they are good for applications where you need additional processing.

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

Rods

Yield Strength: 60,000 psi
Hardness: Rockwell C10 (Medium)
Heat Treatable: Yes
Maximum Hardness After Heat Treatment: Not Rated
Fabrication: See table
Specifications Met: See table

					1 ft. Lg.
Dia.	Dia. Tolerance	Fabrication	Heat Treatment	Specifications Met
4 1/4"	0" to 0.062"	Hot Rolled	Annealed (Softened)	ASTM A322	00000000
4 1/2"	0" to 0.062"	Hot Rolled	Annealed (Softened)	ASTM A322	00000000
5 1/2"	0" to 0.078"	Hot Rolled	Annealed (Softened)	ASTM A322	00000000
6 1/4"	0" to 0.125"	Hot Rolled	Annealed (Softened)	ASTM A322	00000000
6 1/2"	0" to 0.125"	Hot Rolled	Annealed (Softened)	ASTM A322	00000000
7"	0" to 0.156"	Hot Rolled	Annealed (Softened)	ASTM A322	00000000
7 1/2"	0" to 0.156"	Hot Rolled	Annealed (Softened)	ASTM A322	00000000
8"	0" to 0.156"	Hot Rolled	Annealed (Softened)	ASTM A322	00000000

Wear-Resistant 4820 Alloy Steel

Yield Strength: 73,000 psi
Hardness: Rockwell B96 (Medium)
Heat Treatable: Yes
Max. Hardness After Heat Treatment: Not Rated
Fabrication: Hot Rolled
Specifications Met: ASTM A29, ASTM A322

Often used for gears, bushings, and pins, this 4820 alloy steel resists wear from friction and abrasion. It’s a case-hardening steel, which means that heat treating will create a hard surface without making the interior brittle. This steel is manufactured to ASTM standards for performance and quality.

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

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

Dia.	Dia. Tolerance	Straightness Tolerance		1 ft. Lg.	3 ft. Lg.	6 ft. Lg.
2"	-0.015" to 0.015"	1/4" per 5 ft.	00000000	000000	0000000	0000000
3"	0" to 0.046"	1/4" per 5 ft.	00000000	000000	000000	000000
4"	0" to 0.062"	1/4" per 5 ft.	00000000	000000	000000	00
5"	0" to 0.078"	1/4" per 5 ft.	00000000	000000	000000	00

High-Stress-Resistant 6150 Alloy Steel

Yield Strength: 60,000 psi
Hardness: Rockwell C31 (Hard)
Heat Treatable: Yes
Max. Hardness After Heat Treatment: Rockwell C55
Fabrication: Hot Rolled
Specifications Met: ASTM A29, ASTM A322

Made with chromium and vanadium, 6150 alloy steel holds up to wear, shock, and repeated stress better than 5160 steel. This steel maintains its shape and becomes very hard when heat treated, so it’s good for applications involving vibration, impact, and abrasion. Its rods and discs are often used to make disc springs, gears, and shafts. This steel has been manufactured to meet ASTM standards for quality and performance.

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

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

Dia.	Dia. Tolerance	Heat Treatment	Straightness Tolerance		1 ft. Lg.	3 ft. Lg.	6 ft. Lg.
3/4"	-0.008" to 0.008"	Annealed (Softened)	1/8" per 5 ft.	00000000	000000	000000	000000
1"	-0.009" to 0.009"	Annealed (Softened)	1/8" per 5 ft.	00000000	00000	00000	000000
1 1/2"	-0.012" to 0.012"	Annealed (Softened)	1/8" per 5 ft.	00000000	00000	000000	000000
2"	-0.016" to 0.016"	Annealed (Softened)	1/8" per 5 ft.	00000000	00000	000000	000000