ASTM A29 Steel | McMaster-Carr

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27 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.

Ultra-High-Temperature Hardened Multipurpose 4140 Alloy Steel Rods

Yield Strength: 95,000 psi
Hardness: Rockwell C26 (Hard)
Fabrication: See table
Specifications Met: See table

Made with vanadium, this alloy steel retains its strength at temperatures up to 1100° F. It’s hardened for increased abrasion and impact resistance. Also known as chrome-moly steel, it resists fracturing from repeated stress. These rods are used for a wide range of parts, including gears, shafts, and die holders. This steel has been manufactured to meet ASTM A193 Grade B16, the standard for ultra-high-temperature applications.

Note: Rods 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.

Dia.	Dia. Tolerance	Fabrication	Heat Treatment	Straightness Tolerance	Max. Temp., °F	Specifications Met		1/2 ft. Lg.	1 ft. Lg.	3 ft. Lg.	6 ft. Lg.
1 1/4"	-0.011" to 0.011"	Hot Rolled	Hardened	1/4" per 5 ft.	1100°	ASTM A193 Grade B16, ASTM A29	9555N133	00	000000	0000000	0000000
1 1/2"	-0.012" to 0.012"	Hot Rolled	Hardened	1/4" per 5 ft.	1100°	ASTM A193 Grade B16, ASTM A29	9555N134	00	00000	000000	000000
2"	-0.016" to 0.016"	Hot Rolled	Hardened	1/4" per 5 ft.	1100°	ASTM A193 Grade B16, ASTM A29	9555N135	00	000000	000000	000000
2 1/2"	0" to 0.032"	Hot Rolled	Hardened	1/4" per 5 ft.	1100°	ASTM A193 Grade B16, ASTM A29	9555N136	000000	000000	000000	00
3"	0" to 0.047"	Hot Rolled	Hardened	1/4" per 5 ft.	1100°	ASTM A193 Grade B16, ASTM A29	9555N137	000000	000000	000000	00
3 1/2"	0" to 0.063"	Hot Rolled	Hardened	1/4" per 5 ft.	1100°	ASTM A193 Grade B16, ASTM A29	9555N138	000000	000000	000000	00
4"	0" to 0.063"	Hot Rolled	Hardened	1/4" per 5 ft.	1100°	ASTM A193 Grade B16, ASTM A29	9555N139	000000	000000	000000	00

Hardened Multipurpose 4140 Alloy Steel Hex Bars

Yield Strength: 105,000 psi
Hardness: Rockwell C35 (Hard)
Fabrication: Hot Rolled
Specifications Met: ASTM A29, ASTM A108, ASTM A193

A hardened surface makes these hex bars more impact and abrasion resistant than untreated bars. They’re also stress relieved to reduce the chance of warping during machining. These hex bars are often used to create gears, shafts, and other hard-working parts. They resist fracturing from repeated stress. All have been manufactured to meet ASTM standards for quality and performance. Also known as chrome-moly steel.

Note: Hex bars 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.

Wd.	Wd. Tolerance	Heat Treatment		1/2 ft. Lg.	1 ft. Lg.	2 ft. Lg.	3 ft. Lg.	6 ft. Lg.	10 ft. Lg.
5/8"	-0.007" to 0.007"	Hardened, Stress Relieved	6607K35	00	000000	000000	000000	000000	0000000
3/4"	-0.007" to 0.007"	Hardened, Stress Relieved	6607K37	00	00000	00000	000000	000000	000000
7/8"	-0.008" to 0.008"	Hardened, Stress Relieved	6607K39	000000	00000	00000	000000	000000	000000
1"	-0.008" to 0.008"	Hardened, Stress Relieved	6607K51	00000	00000	000000	000000	000000	000000
1 1/8"	-0.008" to 0.008"	Hardened, Stress Relieved	6607K53	00000	00000	000000	000000	000000	000000
1 1/4"	-0.008" to 0.008"	Hardened, Stress Relieved	6607K55	00000	00000	000000	000000	000000	000000
1 3/8"	-0.008" to 0.008"	Hardened, Stress Relieved	6607K57	00000	000000	000000	000000	000000	00
1 1/2"	-0.008" to 0.008"	Hardened, Stress Relieved	6607K59	00000	000000	000000	000000	000000	000000
1 3/4"	-0.009" to 0.009"	Hardened, Stress Relieved	6607K61	000000	000000	000000	000000	000000	00
2"	-0.009" to 0.009"	Hardened, Stress Relieved	6607K63	000000	000000	000000	000000	000000	00000000

Easy-to-Weld 4130 Alloy Steel Rods

Yield Strength: Not Rated
Hardness: Rockwell C21 (Hard)
Fabrication: See table
Specifications Met: See table

Made from 4130 alloy steel, also known as chrome-moly steel, these rods have low carbon content for good weldability. They’re often used to make gears and bushings. The surface of these rods is hardened to make them more resistant to wear and impacts. They’re also normalized, which is a heating process that relieves internal stress and helps prevent cracking during machining or additional hardening. These rods have been manufactured to ASTM and 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.

Dia.	Dia. Tolerance	Fabrication	Heat Treatment	Specifications Met		1/2 ft. Lg.	1 ft. Lg.	3 ft. Lg.
4"	0" to 0.063"	Hot Rolled	Hardened, Normalized	ASTM A29, SAE AMS2301, SAE AMS6348	6673T139	0000000	0000000	0000000
6"	0" to 0.125"	Hot Rolled	Hardened, Normalized	ASTM A29, SAE AMS2301, SAE AMS6348	6673T141	000000	000000	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.

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.	9636N111	000000	0000000	0000000
3"	0" to 0.046"	1/4" per 5 ft.	9636N115	000000	000000	000000
4"	0" to 0.062"	1/4" per 5 ft.	9636N119	000000	000000	00
5"	0" to 0.078"	1/4" per 5 ft.	9636N123	000000	000000	00

High-Stress-Resistant 6150 Alloy Steel

Yield Strength: 59,000 psi
Hardness: Rockwell C15 (Medium)
Heat Treatable: Yes
Max. Hardness After Heat Treatment: Rockwell C55
Fabrication: Cold Drawn
Specifications Met: ASTM A108, ASTM A29

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.

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.	9474N114	000000	000000	000000
1"	-0.009" to 0.009"	Annealed (Softened)	1/8" per 5 ft.	9474N115	00000	00000	000000
1 1/2"	-0.012" to 0.012"	Annealed (Softened)	1/8" per 5 ft.	9474N116	00000	000000	000000
2"	-0.016" to 0.016"	Annealed (Softened)	1/8" per 5 ft.	9474N117	000000	000000	000000