	System of Measurement System of Measurement

	Diameter Diameter

	Shape Shape


Rod and Disc	Ball

Wire	Round Tube

	Tolerance Rating Tolerance Rating

Standard

Tight

	Hardness Rating Hardness Rating

Medium

Hard

Very Hard

	Hardness Hardness

	Heat Treatment Heat Treatment

Annealed (Softened)

Hardened

	Appearance Appearance

Plain

Mirror-Like

	Fabrication Fabrication

Cold Worked

Hot Rolled

	Specifications Met Specifications Met

ASTM A295

ASTM A108

	DFARS (Defense Acquisition Regulations Supplement) DFARS (Defense Acquisition Regulations Supplement)

DFARS Specialty Metals
Compliant

DFARS Specialty Metals
COTS-Exempt

	Elongation Elongation

	Certificate Certificate

	Material Certificate with Traceable Lot Number

	Yield Strength Yield Strength

	Length Length

	OD OD

	ID ID

	Wall Thickness Wall Thickness

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151 Products

About Carbon Steel, Alloy Steel, Spring Steel, and Cast Iron

Yield Strength: Not Rated
Hardness: Rockwell C24 (Hard)
Heat Treatable: Yes
Specifications Met: ASTM A108, ASTM A295

Also known as chrome steel, 52100 is an extremely hard and wear-resistant material. It’s used for parts such as bearings, bushings, and punches.

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 ACTIVITY after your order ships.

Dia.	Dia. Tolerance	Heat Treatment	Straightness Tolerance		1 ft. Lg.	3 ft. Lg.	6 ft. Lg.
3/16"	-0.006" to 0"	Annealed (Softened)	3/16" per 10 ft.	0000000	00000	00000	000000
1/4"	-0.006" to 0"	Annealed (Softened)	3/16" per 10 ft.	00000000	0000	00000	00000
5/16"	-0.006" to 0"	Annealed (Softened)	3/16" per 10 ft.	00000000	0000	00000	00000
3/8"	-0.006" to 0"	Annealed (Softened)	3/16" per 10 ft.	00000000	0000	00000	00000
7/16"	-0.006" to 0"	Annealed (Softened)	3/16" per 10 ft.	00000000	0000	00000	00000
1/2"	-0.006" to 0"	Annealed (Softened)	3/16" per 10 ft.	00000000	00000	00000	00000
9/16"	-0.006" to 0"	Annealed (Softened)	3/16" per 10 ft.	00000000	00000	00000	00000
5/8"	-0.006" to 0"	Annealed (Softened)	3/16" per 10 ft.	0000000	00000	00000	00000
11/16"	-0.006" to 0"	Annealed (Softened)	3/16" per 10 ft.	000000	00000	00000	00000
3/4"	-0.006" to 0"	Annealed (Softened)	3/16" per 10 ft.	0000000	00000	00000	00000
7/8"	-0.006" to 0"	Annealed (Softened)	3/16" per 10 ft.	0000000	00000	00000	00000
1"	-0.006" to 0"	Annealed (Softened)	3/16" per 10 ft.	0000000	00000	00000	000000
1 1/8"	-0.006" to 0"	Annealed (Softened)	3/16" per 10 ft.	0000000	00000	00000	000000
1 1/4"	-0.006" to 0"	Annealed (Softened)	3/16" per 10 ft.	0000000	00000	000000	000000
1 3/8"	-0.006" to 0"	Annealed (Softened)	3/16" per 10 ft.	0000000	00000	000000	000000
1 1/2"	-0.006" to 0"	Annealed (Softened)	3/16" per 10 ft.	0000000	00000	000000	000000
1 5/8"	-0.007" to 0"	Annealed (Softened)	3/16" per 10 ft.	0000000	00000	000000	000000
1 3/4"	-0.007" to 0"	Annealed (Softened)	3/16" per 10 ft.	0000000	00000	000000	000000
2"	-0.007" to 0"	Annealed (Softened)	3/16" per 10 ft.	0000000	000000	000000	000000
2 1/2"	-0.007" to 0"	Annealed (Softened)	3/16" per 10 ft.	0000000	000000	000000	000000
3"	-0.008" to 0"	Annealed (Softened)	3/16" per 10 ft.	0000000	000000	000000	000000

Hard Wear-Resistant 52100 Alloy Steel Balls

Yield Strength: 295,000 psi
Hardness: Rockwell C60 (Very Hard)
Specifications Met: See table

Also known as chrome steel, 52100 is an extremely hard and wear-resistant material. These balls are often used in bearings.

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 ACTIVITY after your order ships.

Mirror-Like
Dia.	Dia. Tolerance	Heat Treatment	Specifications Met	Pkg. Qty.		Pkg.
0.026"	-0.0001" to 0.0001"	Hardened	ASTM A295	500	00000000	000000
1/32"	-0.0001" to 0.0001"	Hardened	ASTM A295	500	00000000	00000
0.043"	-0.0001" to 0.0001"	Hardened	ASTM A295	100	00000000	0000
3/64"	-0.0001" to 0.0001"	Hardened	__	100	00000000	00000
0.0512"	-0.0001" to 0.0001"	Hardened	ASTM A295	100	00000000	0000
0.0565"	-0.0001" to 0.0001"	Hardened	ASTM A295	100	00000000	0000
0.058"	-0.0001" to 0.0001"	Hardened	ASTM A295	100	00000000	0000
1/16"	-0.0001" to 0.0001"	Hardened	__	100	0000000	0000
0.0656"	-0.0001" to 0.0001"	Hardened	ASTM A295	100	00000000	0000
0.072"	-0.0001" to 0.0001"	Hardened	ASTM A295	100	00000000	0000
0.0761"	-0.0001" to 0.0001"	Hardened	ASTM A295	100	00000000	0000
5/64"	-0.0001" to 0.0001"	Hardened	__	100	00000000	00000
0.0833"	-0.0001" to 0.0001"	Hardened	ASTM A295	100	0000000	0000
0.09"	-0.0001" to 0.0001"	Hardened	ASTM A295	100	00000000	0000
3/32"	-0.0001" to 0.0001"	Hardened	__	100	0000000	0000
0.0953"	-0.0001" to 0.0001"	Hardened	ASTM A295	100	00000000	0000
0.0975"	-0.0001" to 0.0001"	Hardened	ASTM A295	100	00000000	0000
0.0981"	-0.0001" to 0.0001"	Hardened	ASTM A295	100	00000000	0000
0.101"	-0.0001" to 0.0001"	Hardened	ASTM A295	100	00000000	0000
7/64"	-0.0001" to 0.0001"	Hardened	__	100	00000000	00000
1/8"	-0.0001" to 0.0001"	Hardened	__	100	0000000	0000
0.1292"	-0.0001" to 0.0001"	Hardened	ASTM A295	100	00000000	0000
0.1345"	-0.0001" to 0.0001"	Hardened	ASTM A295	100	00000000	0000
0.137"	-0.0001" to 0.0001"	Hardened	ASTM A295	100	00000000	0000
9/64"	-0.0001" to 0.0001"	Hardened	__	100	0000000	0000
5/32"	-0.0001" to 0.0001"	Hardened	__	100	0000000	0000
11/64"	-0.0001" to 0.0001"	Hardened	__	100	0000000	0000
3/16"	-0.0001" to 0.0001"	Hardened	__	100	0000000	0000
0.194"	-0.0001" to 0.0001"	Hardened	ASTM A295	100	00000000	00000
7/32"	-0.0001" to 0.0001"	Hardened	__	100	0000000	0000
0.2372"	-0.0001" to 0.0001"	Hardened	ASTM A295	100	00000000	00000
1/4"	-0.0001" to 0.0001"	Hardened	__	100	0000000	0000
17/64"	-0.0001" to 0.0001"	Hardened	__	100	0000000	00000
9/32"	-0.0001" to 0.0001"	Hardened	__	100	0000000	0000
5/16"	-0.0001" to 0.0001"	Hardened	__	100	0000000	0000
11/32"	-0.0001" to 0.0001"	Hardened	__	100	0000000	00000
3/8"	-0.0001" to 0.0001"	Hardened	__	100	0000000	00000
13/32"	-0.0001" to 0.0001"	Hardened	__	100	0000000	00000
7/16"	-0.0001" to 0.0001"	Hardened	__	100	0000000	00000
15/32"	-0.0001" to 0.0001"	Hardened	__	50	0000000	0000
1/2"	-0.0001" to 0.0001"	Hardened	__	50	0000000	0000
17/32"	-0.0001" to 0.0001"	Hardened	__	50	0000000	00000
9/16"	-0.0001" to 0.0001"	Hardened	__	50	0000000	00000
19/32"	-0.0001" to 0.0001"	Hardened	__	25	0000000	0000
5/8"	-0.0001" to 0.0001"	Hardened	__	25	0000000	0000
21/32"	-0.0001" to 0.0001"	Hardened	__	25	0000000	0000
11/16"	-0.0001" to 0.0001"	Hardened	__	25	0000000	00000
23/32"	-0.0001" to 0.0001"	Hardened	__	25	0000000	00000
3/4"	-0.0001" to 0.0001"	Hardened	__	25	0000000	00000
25/32"	-0.0001" to 0.0001"	Hardened	__	10	0000000	0000
13/16"	-0.0001" to 0.0001"	Hardened	__	20	0000000	00000
7/8"	-0.0001" to 0.0001"	Hardened	__	10	0000000	0000
15/16"	-0.0001" to 0.0001"	Hardened	__	10	0000000	00000
1"	-0.0001" to 0.0001"	Hardened	__	5	0000000	0000
1 1/16"	-0.0001" to 0.0001"	Hardened	__	5	0000000	00000
1 1/8"	-0.0001" to 0.0001"	Hardened	__	5	0000000	00000
1 3/16"	-0.0001" to 0.0001"	Hardened	__	1	0000000	0000
1 1/4"	-0.0001" to 0.0001"	Hardened	__	1	0000000	0000
1 5/16"	-0.0001" to 0.0001"	Hardened	__	4	0000000	00000
1 3/8"	-0.0001" to 0.0001"	Hardened	__	1	0000000	0000
1 7/16"	-0.0001" to 0.0001"	Hardened	__	2	0000000	00000
1 1/2"	-0.0002" to 0.0002"	Hardened	__	1	0000000	0000
1 9/16"	-0.0002" to 0.0002"	Hardened	__	1	00000000	00000
1 5/8"	-0.0002" to 0.0002"	Hardened	__	1	0000000	00000
1 11/16"	-0.0002" to 0.0002"	Hardened	__	1	00000000	00000
1 3/4"	-0.0002" to 0.0002"	Hardened	__	1	0000000	00000
1 7/8"	-0.0002" to 0.0002"	Hardened	__	1	0000000	00000
2"	-0.0002" to 0.0002"	Hardened	__	1	0000000	00000
2 1/8"	-0.0002" to 0.0002"	Hardened	__	1	0000000	00000
2 1/4"	-0.0005" to 0.0005"	Hardened	__	1	0000000	00000
2 3/8"	-0.0002" to 0.0002"	Hardened	__	1	0000000	00000
2 1/2"	-0.0002" to 0.0002"	Hardened	__	1	0000000	000000
2 5/8"	-0.0002" to 0.0002"	Hardened	__	1	0000000	000000
2 3/4"	-0.0002" to 0.0002"	Hardened	__	1	0000000	000000
3"	-0.0005" to 0.0005"	Hardened	__	1	0000000	000000
3 1/4"	-0.0005" to 0.0005"	Hardened	__	1	00000000	000000
3 1/2"	-0.0005" to 0.0005"	Hardened	__	1	00000000	000000
4"	-0.0005" to 0.0005"	Hardened	__	1	00000000	000000
4 1/2"	-0.003" to 0.003"	Hardened	__	1	00000000	000000
1mm	-0.0025mm to 0.0025mm	Hardened	__	100	0000000	0000
1.5mm	-0.0025mm to 0.0025mm	Hardened	__	100	0000000	0000
2mm	-0.0025mm to 0.0025mm	Hardened	__	100	0000000	0000
2.5mm	-0.0025mm to 0.0025mm	Hardened	__	100	0000000	0000
3mm	-0.0025mm to 0.0025mm	Hardened	__	100	0000000	0000
3.5mm	-0.0025mm to 0.0025mm	Hardened	__	100	0000000	0000
4mm	-0.0025mm to 0.0025mm	Hardened	__	100	0000000	0000
4.5mm	-0.0025mm to 0.0025mm	Hardened	__	50	0000000	0000
5mm	-0.0025mm to 0.0025mm	Hardened	__	100	0000000	0000
5.5mm	-0.0025mm to 0.0025mm	Hardened	__	50	0000000	0000
6mm	-0.0025mm to 0.0025mm	Hardened	__	50	0000000	0000
6.5mm	-0.0025mm to 0.0025mm	Hardened	__	50	0000000	0000
7mm	-0.0025mm to 0.0025mm	Hardened	__	50	0000000	0000
8mm	-0.0025mm to 0.0025mm	Hardened	__	25	0000000	0000
9mm	-0.0025mm to 0.0025mm	Hardened	__	20	0000000	0000
10mm	-0.0025mm to 0.0025mm	Hardened	__	20	0000000	0000
12mm	-0.0025mm to 0.0025mm	Hardened	__	10	0000000	0000
13mm	-0.0025mm to 0.0025mm	Hardened	__	5	0000000	0000
14mm	-0.0025mm to 0.0025mm	Hardened	__	5	0000000	0000
15mm	-0.0025mm to 0.0025mm	Hardened	__	5	0000000	0000
16mm	-0.0025mm to 0.0025mm	Hardened	__	5	0000000	0000
18mm	-0.0025mm to 0.0025mm	Hardened	__	3	0000000	0000
24mm	-0.0025mm to 0.0025mm	Hardened	__	3	0000000	0000

Tight-Tolerance Hard Wear-Resistant 52100 Alloy Steel Balls

Yield Strength: 295,000psi
Hardness: Rockwell C60 (Very Hard)
Specifications Met: ASTM A295

The diameter on these balls is held to a precise tolerance. Also known as chrome steel, 52100 is an extremely hard and wear-resistant material. These balls are often used in bearings.

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

Mirror-Like
Dia.	Dia. Tolerance	Heat Treatment	Pkg. Qty.		Pkg.
1/16"	-0.00005" to 0.00005"	Hardened	5	00000000	00000
1/8"	-0.00005" to 0.00005"	Hardened	5	0000000	0000
9/64"	-0.00005" to 0.00005"	Hardened	5	0000000	0000
5/32"	-0.00005" to 0.00005"	Hardened	5	0000000	0000
3/16"	-0.00005" to 0.00005"	Hardened	5	0000000	0000
7/32"	-0.00005" to 0.00005"	Hardened	5	0000000	00000
1/4"	-0.00005" to 0.00005"	Hardened	2	0000000	0000
9/32"	-0.00005" to 0.00005"	Hardened	2	0000000	0000
5/16"	-0.00005" to 0.00005"	Hardened	2	0000000	0000
3/8"	-0.00005" to 0.00005"	Hardened	2	0000000	0000
7/16"	-0.00005" to 0.00005"	Hardened	1	0000000	0000
15/32"	-0.00005" to 0.00005"	Hardened	1	0000000	0000
1/2"	-0.00005" to 0.00005"	Hardened	1	0000000	0000
17/32"	-0.00005" to 0.00005"	Hardened	1	0000000	00000

Hard Wear-Resistant 52100 Alloy Steel Wire

Yield Strength: Not Rated
Hardness: Rockwell B95 (Medium)
Heat Treatable: Yes
Tensile Strength: 105,900 psi

Also known as chrome steel, 52100 is an extremely hard and wear-resistant material. This wire is often used for small-diameter bearings, bushings, and punches.

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

Diameter	Diameter Tolerance	Length, ft.	Heat Treatment	Weight, lbs.	Container Type		Each
0.051"	-0.002" to 0.002"	165	Annealed (Softened)	1	Spool	00000000	000000
0.075"	-0.002" to 0.002"	58	Annealed (Softened)	1	Spool	00000000	00000
0.103"	-0.002" to 0.002"	36	Annealed (Softened)	1	Spool	00000000	00000
0.126"	-0.002" to 0.002"	26	Annealed (Softened)	1	Spool	00000000	00000
0.142"	-0.002" to 0.002"	16	Annealed (Softened)	1	Spool	00000000	00000
0.165"	-0.002" to 0.002"	14	Annealed (Softened)	1	Spool	00000000	00000
0.19"	-0.002" to 0.002"	10	Annealed (Softened)	1	Spool	00000000	00000
0.218"	-0.002" to 0.002"	8	Annealed (Softened)	1	Spool	00000000	00000

Hard Wear-Resistant 52100 Alloy Steel Tubes

Yield Strength: See table
Hardness: See table
Heat Treatable: Yes
Maximum Hardness After Heat Treatment: Rockwell C60
Specifications Met: ASTM A295

Easier to machine than 52100 alloy steel rods, these extremely hard and wear-resistant tubes are often used to create bearings, bushings, and other cylindrical parts that are under constant stress. They’re also known as chrome steel.

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 ACTIVITY after your order ships.

0.245" Wall Thickness (-0.0123" to 0.0123" Tolerance)
OD	OD Tolerance	ID	ID Tolerance	Yield Strength, psi	Hardness		1 ft. Lg.	3 ft. Lg.	6 ft. Lg.
1.207"	-0.005" to 0.005"	0.717"	-0.01" to 0.01"	140,000	Rockwell B100	0000000	000000	000000	0000000
0.309" Wall Thickness (-0.0155" to 0.0155" Tolerance)
1.315"	-0.005" to 0.005"	0.697"	-0.01" to 0.01"	140,000	Rockwell B100	0000000	00000	00000	000000
0.353" Wall Thickness (-0.0176" to 0.0176" Tolerance)
1.551"	-0.005" to 0.005"	0.846"	-0.01" to 0.01"	140,000	Rockwell B100	0000000	00000	000000	000000
0.382" Wall Thickness (-0.0191" to 0.0191" Tolerance)
2.071"	-0.006" to 0.006"	1.253"	-0.01" to 0.01"	140,000	Rockwell B100	0000000	00000	000000	000000
0.472" Wall Thickness (-0.0236" to 0.0236" Tolerance)
2.57"	-0.008" to 0.008"	1.627"	-0.01" to 0.01"	140,000	Rockwell B100	0000000	00000	000000	000000
0.807" Wall Thickness (-0.061" to 0.061" Tolerance)
3.138"	-0.019" to 0.019"	1.524"	Not Rated	50,000	Rockwell B95	0000000	000000	000000	000000

151 Products

About Carbon Steel, Alloy Steel, Spring Steel, and Cast Iron

Hard Wear-Resistant 52100 Alloy Steel Rods

Hard Wear-Resistant 52100 Alloy Steel Balls

Tight-Tolerance Hard Wear-Resistant 52100 Alloy Steel Balls

Hard Wear-Resistant 52100 Alloy Steel Wire

Hard Wear-Resistant 52100 Alloy Steel Tubes

Hard Wear-Resistant 52100 Alloy Steel Rods

Hard Wear-Resistant 52100 Alloy Steel Balls

Tight-Tolerance Hard Wear-Resistant 52100 Alloy Steel Balls

Hard Wear-Resistant 52100 Alloy Steel Wire

Hard Wear-Resistant 52100 Alloy Steel Tubes