Rockwell B110 Steel | McMaster-Carr

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M2 High-Speed Tool Steel

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Rockwell C48 to Rockwell C51

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40,000 psi to 99,999 psi

100,000 psi to 199,999 psi

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Rockwell C62

Rockwell C66

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37 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 Multipurpose Air-Hardening A2 Tool Steel Rods

Precision ground and held to a strict straightness tolerance, these rods are ready for turning in your lathe. Also known as drill rod, this A2 tool steel is more wear resistant than O1 and keeps a sharper cutting edge. It’s air-hardening, so it doesn’t require baths or quenching after heat treatment. This tool steel is often used for punches, blades, and hammers. These rods have been manufactured to ASTM A681 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.

Rods

Yield Strength: See Table
Hardness: See Table
Heat Treatable: Yes
Max. Hardness After Heat Treatment: Rockwell C62
Fabrication: Hot Rolled
Specifications Met: ASTM A681

Dia.	Dia. Tolerance	Yield Strength	Heat Treatment	Hardness	Mechanical Finish	Straightness Tolerance		1 ft. Lg.	3 ft. Lg.	6 ft. Lg.
1/16"	-0.0003" to 0.0003"	55,000 psi	Annealed (Softened)	Rockwell B110	Precision Ground	0.005" per ft.	00000000	00000	00000	00000
5/64"	-0.0003" to 0.0003"	55,000 psi	Annealed (Softened)	Rockwell B110	Precision Ground	0.005" per ft.	00000000	0000	0000	0000
3/32"	-0.0003" to 0.0003"	55,000 psi	Annealed (Softened)	Rockwell B110	Precision Ground	0.005" per ft.	00000000	0000	0000	0000
7/64"	-0.0003" to 0.0003"	55,000 psi	Annealed (Softened)	Rockwell B110	Precision Ground	0.005" per ft.	00000000	0000	0000	00000

Metric Rods

Yield Strength: 55,000 psi
Hardness: See table
Heat Treatable: Yes
Max. Hardness After Heat Treatment: Rockwell C62
Fabrication: Hot Rolled
Specifications Met: ASTM A681

Dia., mm	Dia. Tolerance, mm	Heat Treatment	Hardness	Mechanical Finish	Straightness Tolerance		1 ft. Lg.	3 ft. Lg.	6 ft. Lg.
2	-0.0076 to 0.0076	Annealed (Softened)	Rockwell B110	Precision Ground	0.0125" per ft.	0000000	00000	000000	000000
3	-0.0076 to 0.0076	Annealed (Softened)	Rockwell B110	Precision Ground	0.0125" per ft.	0000000	0000	00000	00000

Tight-Tolerance High-Speed M2 Tool Steel Rods

Yield Strength: 105,000 psi
Hardness: Rockwell B110 (Hard)
Heat Treatable: Yes
Max. Hardness After Heat Treatment: Rockwell C66
Specifications Met: ASTM A600

Also called drill rod, these precision-ground rods have a tight diameter tolerance and are held to a strict straightness tolerance. Use them for turning applications in your lathe. M2 tool steel offers a nice balance of wear resistance and machinability. It has a high molybdenum content, which allows it to maintain sharp cutting edges even at elevated temperatures.

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

					3 ft. Lg.
Dia.	Dia. Tolerance	Heat Treatment	Mechanical Finish	Straightness Tolerance		Each
1/16"	-0.0003" to 0.0003"	Annealed (Softened)	Precision Ground	0.005" per ft.	00000000	000000
5/64"	-0.0003" to 0.0003"	Annealed (Softened)	Precision Ground	0.005" per ft.	00000000	00000
3/32"	-0.0003" to 0.0003"	Annealed (Softened)	Precision Ground	0.005" per ft.	00000000	00000
7/64"	-0.0003" to 0.0003"	Annealed (Softened)	Precision Ground	0.005" per ft.	00000000	00000
1/8"	-0.0005" to 0.0005"	Annealed (Softened)	Precision Ground	0.005" per ft.	00000000	00000
5/32"	-0.0005" to 0.0005"	Annealed (Softened)	Precision Ground	0.005" per ft.	00000000	00000
3/16"	-0.0005" to 0.0005"	Annealed (Softened)	Precision Ground	0.005" per ft.	00000000	00000
1/4"	-0.0005" to 0.0005"	Annealed (Softened)	Precision Ground	0.005" per ft.	00000000	00000
5/16"	-0.0005" to 0.0005"	Annealed (Softened)	Precision Ground	0.005" per ft.	00000000	00000
3/8"	-0.0005" to 0.0005"	Annealed (Softened)	Precision Ground	0.005" per ft.	00000000	00000
7/16"	-0.0005" to 0.0005"	Annealed (Softened)	Precision Ground	0.005" per ft.	00000000	000000
1/2"	-0.001" to 0.001"	Annealed (Softened)	Precision Ground	0.005" per ft.	00000000	000000
5/8"	-0.001" to 0.001"	Annealed (Softened)	Precision Ground	0.005" per ft.	00000000	000000
3/4"	-0.001" to 0.001"	Annealed (Softened)	Precision Ground	0.005" per ft.	00000000	000000
1"	-0.001" to 0.001"	Annealed (Softened)	Precision Ground	0.005" per ft.	00000000	000000
1 1/4"	-0.001" to 0.001"	Annealed (Softened)	Precision Ground	0.005" per ft.	00000000	000000

Tight-Tolerance Wear-Resistant D2 Tool Steel Rods

Yield Strength: 50,000 psi
Hardness: Rockwell B110 (Hard)
Heat Treatable: Yes
Max. Hardness After Heat Treatment: Rockwell C62
Specifications Met: ASTM A681

All set for turning in your lathe, these precision-ground rods are held to tight diameter and straightness tolerances. They’re also known as drill rod. The addition of nickel gives D2 tool steel better wear resistance than A2. This air-hardening material is often used for cutting blades, stamps, and forming dies.

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	Mechanical Finish	Straightness Tolerance		1/2 ft. Lg.	1 ft. Lg.	1 1/2 ft. Lg.	3 ft. Lg.	6 ft. Lg.
1/8"	-0.0005" to 0.0005"	Annealed (Softened)	Precision Ground	0.005" per ft.	0000000	000000	000000	000000	000000	000000
3/16"	-0.0005" to 0.0005"	Annealed (Softened)	Precision Ground	0.005" per ft.	0000000	00000	00000	00000	00000	00000
1/4"	-0.0005" to 0.0005"	Annealed (Softened)	Precision Ground	0.005" per ft.	0000000	00000	00000	00000	00000	00000
5/16"	-0.0005" to 0.0005"	Annealed (Softened)	Precision Ground	0.005" per ft.	0000000	00000	00000	00000	00000	00000
3/8"	-0.0005" to 0.0005"	Annealed (Softened)	Precision Ground	0.005" per ft.	0000000	00000	00000	00000	00000	000000
7/16"	-0.0005" to 0.0005"	Annealed (Softened)	Precision Ground	0.005" per ft.	0000000	00000	00000	00000	00000	000000
1/2"	-0.0010" to 0.0010"	Annealed (Softened)	Precision Ground	0.005" per ft.	0000000	00000	00000	00000	000000	000000
5/8"	-0.0010" to 0.0010"	Annealed (Softened)	Precision Ground	0.005" per ft.	0000000	00000	00000	000000	000000	000000
3/4"	-0.0010" to 0.0010"	Annealed (Softened)	Precision Ground	0.005" per ft.	0000000	00000	000000	000000	000000	000000
7/8"	-0.0010" to 0.0010"	Annealed (Softened)	Precision Ground	0.005" per ft.	00000000	00000	000000	000000	000000	000000
1"	-0.0010" to 0.0010"	Annealed (Softened)	Precision Ground	0.005" per ft.	00000000	000000	000000	000000	000000	000000
1 1/4"	-0.0010" to 0.0010"	Annealed (Softened)	Precision Ground	0.005" per ft.	00000000	000000	000000	000000	000000	000000
1 1/2"	-0.0010" to 0.0010"	Annealed (Softened)	Precision Ground	0.005" per ft.	00000000	000000	000000	000000	000000	00000000
1 3/4"	-0.0010" to 0.0010"	Annealed (Softened)	Precision Ground	0.005" per ft.	00000000	000000	000000	000000	000000	00000000
2"	-0.0010" to 0.0010"	Annealed (Softened)	Precision Ground	0.005" per ft.	00000000	000000	000000	000000	00000000	00000000