S-2 Rockbit Balls

s2 Rock Bit Balls

S-2 Tool Steel balls are designed to achieve extreme ruggedness. The ball surface has a smooth ground and polished finish. These balls provide the toughness and strength necessary for severe shock loads. S-2 Tool Steel balls are hardened throughout and have unusually good wear characteristics.

S-2 Tool Steel balls find most frequent use in oil field equipment and offshore drilling operations. They provide good service in withstanding the abrasion of pulverized rock and mud slurries.

Balls per Pkg	Part #	Grade #	Diameter	Pkg. Price	Order Online
Rockbit Balls
100	KB-1802	200	0.187	$7.60	Add to Order
100	KB-1803	200	0.250	$14.12	Add to Order
100	KB-1804	200	0.312	$21.72	Add to Order
50	KB-1805	200	0.437	$24.00	Add to Order
50	KB-1806	200	0.500	$29.20	Add to Order
50	KB-1807	200	0.562	$38.52	Add to Order
20	KB-1818	200	0.687	$24.00	Add to Order
20	KB-1809	200	0.750	$33.00	Add to Order
20	KB-1800	200	0.812	$44.00	Add to Order
10	KB-1811	200	0.875	$26.76	Add to Order
10	KB-1835	200	0.937	$30.96	Add to Order
10	KB-1814	200	1.00	$37.84	Add to Order

Material Analysis:

S-2 Tool Steel (Rockbit) balls are manufactured to the following chemical analysis:

Material	AISI	Federal	Military	ASTM	UNS	AMS	Military and Gov't Stds.
S-2 Tool Steel	S-2	QQ-T-570	-	A681	T-4190	-	-

Chemical Analysis
Carbon................................................................	0.47% to 0.55%
Manganese.........................................................	0.30% to 0.50%
Silicon..................................................................	0.90% to 1.10%
Molybdenum........................................................	0.30% to 0.60%
Phosphorus.........................................................	0.030% maximum
Sulpher.................................................................	0.030% maximum
Vanadium............................................................	0.5% maximum

Mechanical Properties Hardness as measured on parallel flat surfaces is Rockwell “C” 55-58. Ball of special hardness are available upon request.
Tensile strength...................................................	310,000 psi
Yield strength.......................................................	290,000 psi
Elongation in two inches....................................	7%
Reduction in area................................................	25%
Modulus of elasticity...........................................	30,000,000 psi
Density.................................................................	0.283 lbs./cu. in