Tool Steel Balls | McMaster-Carr

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Material

Low-Carbon Steel

S2 Tool Steel

System of Measurement

Diameter

Shape

Tolerance Rating

Mechanical Finish

Hardness Rating

Heat Treatment

Yield Strength

Hardness

Appearance

Steel Grade

1010-1018 Low-Carbon Steel

1018 Low-Carbon Steel

Maximum Temperature

Elongation

Performance

U.S.–Mexico–Canada Agreement (USMCA) Qualifying

DFARS Specialty Metals

Exempt

Not Compliant

Export Control Classification Number (ECCN)

Minimum Temperature

RoHS

REACH

Heat Treatable

Application

Fabrication

Certificate Type

Material Certificate with Traceable Lot Number

Specifications Met

ASTM A681

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60 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.

Performance

High Strength

Yield strength between 25,000 and 65,999 psi

50 products

Extreme Strength

Yield strength of 100,000 psi or higher

10 products

Performance

Ultra Weldable

Easily weld strong joints using common methods such as MIG and TIG

50 products

Ultra Tough

Won't crack even from extreme impacts and sudden shocks

10 products

Steel Balls

Multipurpose Low-Carbon Steel—Low-carbon steel balls are our easiest steel balls to machine. They are often used for parts that don’t require high strength, such as knobs. These balls can be surface hardened with heat treating for added wear resistance.

Shock-Resistant S2 Tool Steel—This S2 tool steel has been hardened for excellent strength and impact resistance. It has a tough core that resists breaking under shock loads.

	Dia. Tolerance	Heat Treatment	Yield Strength, psi	Mechanical Finish	Hardness	Appearance	Specs. Met	Pkg. Qty.		Pkg.
Multipurpose Low-Carbon Steel



	1/16"	-0.005" to 0.005"	Case Hardened	44,000	Tumbled	Rockwell C60 (Extra Hard)	Mirror Like	—	500	96455K71	00000


	3/32"	-0.005" to 0.005"	Case Hardened	44,000	Tumbled	Rockwell C60 (Extra Hard)	Mirror Like	—	500	96455K72	0000
	7/64"	-0.005" to 0.005"	Case Hardened	44,000	Tumbled	Rockwell C60 (Extra Hard)	Mirror Like	—	1,000	96455K111	00000
	1/8"	-0.005" to 0.005"	Case Hardened	44,000	Tumbled	Rockwell C60 (Extra Hard)	Mirror Like	—	500	96455K49	0000
	9/64"	-0.005" to 0.005"	Case Hardened	44,000	Tumbled	Rockwell C60 (Extra Hard)	Mirror Like	—	1,000	96455K112	00000
	5/32"	-0.005" to 0.005"	Case Hardened	44,000	Tumbled	Rockwell C60 (Extra Hard)	Mirror Like	—	500	96455K73	0000
	11/64"	-0.005" to 0.005"	Case Hardened	44,000	Tumbled	Rockwell C60 (Extra Hard)	Mirror Like	—	750	96455K113	00000
	3/16"	-0.005" to 0.005"	Case Hardened	44,000	Tumbled	Rockwell C60 (Extra Hard)	Mirror Like	—	250	96455K51	0000
	7/32"	-0.005" to 0.005"	Case Hardened	44,000	Tumbled	Rockwell C60 (Extra Hard)	Mirror Like	—	250	96455K74	0000
	1/4"	-0.005" to 0.005"	Case Hardened	44,000	Tumbled	Rockwell C60 (Extra Hard)	Mirror Like	—	250	96455K52	0000
	17/64"	-0.005" to 0.005"	Case Hardened	44,000	Tumbled	Rockwell C60 (Extra Hard)	Mirror Like	—	500	96455K114	00000


	9/32"	-0.005" to 0.005"	Case Hardened	44,000	Tumbled	Rockwell C60 (Extra Hard)	Mirror Like	—	250	96455K75	00000
	5/16"	-0.005" to 0.005"	Case Hardened	44,000	Tumbled	Rockwell C60 (Extra Hard)	Mirror Like	—	250	96455K53	0000
	11/32"	-0.005" to 0.005"	Case Hardened	44,000	Tumbled	Rockwell C60 (Extra Hard)	Mirror Like	—	100	96455K76	0000
	3/8"	-0.005" to 0.005"	Case Hardened	44,000	Tumbled	Rockwell C60 (Extra Hard)	Mirror Like	—	250	96455K54	00000
	13/32"	-0.005" to 0.005"	Case Hardened	44,000	Tumbled	Rockwell C60 (Extra Hard)	Mirror Like	—	100	96455K115	00000
	7/16"	-0.005" to 0.005"	Case Hardened	44,000	Tumbled	Rockwell C60 (Extra Hard)	Mirror Like	—	100	96455K55	0000
	15/32"	-0.005" to 0.005"	Case Hardened	44,000	Tumbled	Rockwell C60 (Extra Hard)	Mirror Like	—	100	96455K116	00000
	1/2"	-0.005" to 0.005"	Case Hardened	44,000	Tumbled	Rockwell C60 (Extra Hard)	Mirror Like	—	100	96455K56	00000
	9/16"	-0.005" to 0.005"	Case Hardened	44,000	Tumbled	Rockwell C60 (Extra Hard)	Mirror Like	—	100	96455K57	00000
	5/8"	-0.005" to 0.005"	Case Hardened	44,000	Tumbled	Rockwell C60 (Extra Hard)	Mirror Like	—	50	96455K58	00000


	11/16"	-0.005" to 0.005"	Case Hardened	44,000	Tumbled	Rockwell C60 (Extra Hard)	Mirror Like	—	25	96455K117	00000
	3/4"	-0.005" to 0.005"	Case Hardened	44,000	Tumbled	Rockwell C60 (Extra Hard)	Mirror Like	—	25	96455K59	00000
	7/8"	-0.005" to 0.005"	Case Hardened	44,000	Tumbled	Rockwell C60 (Extra Hard)	Mirror Like	—	20	96455K77	00000
	1"	-0.005" to 0.005"	Case Hardened	44,000	Tumbled	Rockwell C60 (Extra Hard)	Mirror Like	—	10	96455K62	00000
	1 1/4"	-0.005" to 0.005"	Case Hardened	44,000	Tumbled	Rockwell C60 (Extra Hard)	Mirror Like	—	5	96455K118	00000
	1 1/2"	-0.005" to 0.005"	Case Hardened	44,000	Tumbled	Rockwell C60 (Extra Hard)	Mirror Like	—	5	96455K119	00000
	2"	-0.005" to 0.005"	Case Hardened	44,000	Tumbled	Rockwell C60 (Extra Hard)	Mirror Like	—	1	96455K121	00000
	1 mm	-0.13 mm to 0.13 mm	Case Hardened	44,000	Tumbled	Rockwell C60 (Extra Hard)	Mirror Like	—	1,500	96455K122	00000
	1.5 mm	-0.13 mm to 0.13 mm	Case Hardened	44,000	Tumbled	Rockwell C60 (Extra Hard)	Mirror Like	—	1,500	96455K123	00000
	2 mm	-0.13 mm to 0.13 mm	Case Hardened	44,000	Tumbled	Rockwell C60 (Extra Hard)	Mirror Like	—	1,500	96455K124	00000


	2.5 mm	-0.13 mm to 0.13 mm	Case Hardened	44,000	Tumbled	Rockwell C60 (Extra Hard)	Mirror Like	—	1,500	96455K125	00000
	3 mm	-0.13 mm to 0.13 mm	Case Hardened	44,000	Tumbled	Rockwell C60 (Extra Hard)	Mirror Like	—	1,000	96455K126	00000
	3.5 mm	-0.13 mm to 0.13 mm	Case Hardened	44,000	Tumbled	Rockwell C60 (Extra Hard)	Mirror Like	—	1,000	96455K127	00000
	4 mm	-0.13 mm to 0.13 mm	Case Hardened	44,000	Tumbled	Rockwell C60 (Extra Hard)	Mirror Like	—	1,000	96455K128	00000
	4.5 mm	-0.13 mm to 0.13 mm	Case Hardened	44,000	Tumbled	Rockwell C60 (Extra Hard)	Mirror Like	—	500	96455K129	00000
	5 mm	-0.13 mm to 0.13 mm	Case Hardened	44,000	Tumbled	Rockwell C60 (Extra Hard)	Mirror Like	—	500	96455K131	00000
	5.5 mm	-0.13 mm to 0.13 mm	Case Hardened	44,000	Tumbled	Rockwell C60 (Extra Hard)	Mirror Like	—	500	96455K132	00000
	6 mm	-0.13 mm to 0.13 mm	Case Hardened	44,000	Tumbled	Rockwell C60 (Extra Hard)	Mirror Like	—	250	96455K133	00000
	6.5 mm	-0.13 mm to 0.13 mm	Case Hardened	44,000	Tumbled	Rockwell C60 (Extra Hard)	Mirror Like	—	250	96455K134	00000
	7 mm	-0.13 mm to 0.13 mm	Case Hardened	44,000	Tumbled	Rockwell C60 (Extra Hard)	Mirror Like	—	250	96455K135	00000


	8 mm	-0.13 mm to 0.13 mm	Case Hardened	44,000	Tumbled	Rockwell C60 (Extra Hard)	Mirror Like	—	250	96455K136	00000
	9 mm	-0.13 mm to 0.13 mm	Case Hardened	44,000	Tumbled	Rockwell C60 (Extra Hard)	Mirror Like	—	250	96455K137	00000
	10 mm	-0.13 mm to 0.13 mm	Case Hardened	44,000	Tumbled	Rockwell C60 (Extra Hard)	Mirror Like	—	100	96455K138	00000
	12 mm	-0.13 mm to 0.13 mm	Case Hardened	44,000	Tumbled	Rockwell C60 (Extra Hard)	Mirror Like	—	50	96455K139	00000
	13 mm	-0.13 mm to 0.13 mm	Case Hardened	44,000	Tumbled	Rockwell C60 (Extra Hard)	Mirror Like	—	100	96455K141	00000
	14 mm	-0.13 mm to 0.13 mm	Case Hardened	44,000	Tumbled	Rockwell C60 (Extra Hard)	Mirror Like	—	100	96455K142	00000
	15 mm	-0.13 mm to 0.13 mm	Case Hardened	44,000	Tumbled	Rockwell C60 (Extra Hard)	Mirror Like	—	50	96455K143	00000
	16 mm	-0.13 mm to 0.13 mm	Case Hardened	44,000	Tumbled	Rockwell C60 (Extra Hard)	Mirror Like	—	50	96455K144	00000
	18 mm	-0.13 mm to 0.13 mm	Case Hardened	44,000	Tumbled	Rockwell C60 (Extra Hard)	Mirror Like	—	25	96455K145	00000


Shock-Resistant S2 Tool Steel



	3/16"	-0.001" to 0.001"	Hardened	290,000	Ground, Polished	Rockwell C55 (Extra Hard)	Mirror Like	ASTM A681	100	1995T11	0000


	1/4"	-0.001" to 0.001"	Hardened	290,000	Ground, Polished	Rockwell C55 (Extra Hard)	Mirror Like	ASTM A681	100	1995T12	0000
	5/16"	-0.001" to 0.001"	Hardened	290,000	Ground, Polished	Rockwell C55 (Extra Hard)	Mirror Like	ASTM A681	100	1995T13	00000
	7/16"	-0.001" to 0.001"	Hardened	290,000	Ground, Polished	Rockwell C55 (Extra Hard)	Mirror Like	ASTM A681	50	1995T14	00000
	1/2"	-0.001" to 0.001"	Hardened	290,000	Ground, Polished	Rockwell C55 (Extra Hard)	Mirror Like	ASTM A681	50	1995T15	00000
	3/4"	-0.001" to 0.001"	Hardened	290,000	Ground, Polished	Rockwell C55 (Extra Hard)	Mirror Like	ASTM A681	10	1995T18	0000
	13/16"	-0.001" to 0.001"	Hardened	290,000	Ground, Polished	Rockwell C55 (Extra Hard)	Mirror Like	ASTM A681	10	1995T19	00000
	7/8"	-0.001" to 0.001"	Hardened	290,000	Ground, Polished	Rockwell C55 (Extra Hard)	Mirror Like	ASTM A681	10	1995T21	00000
	15/16"	-0.001" to 0.001"	Hardened	290,000	Ground, Polished	Rockwell C55 (Extra Hard)	Mirror Like	ASTM A681	10	1995T22	00000
	1"	-0.001" to 0.001"	Hardened	290,000	Ground, Polished	Rockwell C55 (Extra Hard)	Mirror Like	ASTM A681	5	1995T23	00000