S-2 Rockbit 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.

S-2 Tool Steel (Rockbit) Balls: Available Grades and Sizes
Grade	Size Range in Inches and Millimeters
50 - 200	5/32 - 1 3/4 3.968 - 38.100

Click here for sizes and pricing

Balls per Pound
Size		Balls per Pound
Inches	Millimeters	Balls per Pound
3/16	4.762	1,020
7/32	5.556	645
1/4	6.350	432
9/32	7.143	303
5/16	7.937	221
11/32	8.731	166
3/8	9.525	128
13/32	10.318	101
7/16	11.112	80.6
15/32	11.906	65.5
1/2	12.700	54.0
17/32	13.493	445.0
9/16	14.287	37.9
5/8	15.875	27.6
11/16	17.462	20.8
3/4	19.050	16.0
13/16	20.637	12.6
7/8	22.225	10.1
1	25.400	6.75
1 1/8	28.575	4.74
1 1/4	31.750	3.46
1 1/2	38.100	2.00
* Upon special request only.

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

Rockbit Balls Click Here for Ball Terms and Definitions (Grades Available and Tolerances ) Click here to Order Online
Balls per Pkg	Stock #	Grade #	Diameter	Pkg Qty.	Price/Pkg
40000	KB-1219	200	0.187	Per 1000	$37.44
100	KB-1802	200	0.187	Per 100	$4.73
40000	KB-1218	48	0.187	Per 1000	$39.00
4350	KB-1221	200	0.250	Per 1000	$64.56
100	KB-1803	200	0.250	Per 100	$8.62
4350	KB-1220	48	0.250	Per 1000	$67.22
3000	KB-1213	200	0.281	Per 1000	$92.88
3000	KB-1192	48	0.281	Per 1000	$96.72
2200	KB-1182	200	0.312	Per 1000	$76.56
100	KB-1804	200	0.312	Per 100	$13.34
2200	KB-1211	48	0.312	Per 1000	$104.06
1300	KB-1184	200	0.375	Per 1000	$113.88
1300	KB-1183	48	0.375	Per 1000	$118.58
1300	KB-1186	200	0.406	Per 1000	$142.68
1300	KB-1185	48	0.406	Per 1000	$148.56
810	KB-1188	200	0.437	Per 1000	$165.96
810	KB-1187	48	0.437	Per 1000	$172.80
50	KB-1805	200	0.437	Per 50	$13.50
550	KB-1201	200	0.500	Per 1000	$195.72
50	KB-1806	200	0.500	Per 50	$16.70
550	KB-1189	48	0.500	Per 1000	$203.80
380	KB-1181	200	0.562	Per 1000	$269.48
380	KB-1191	48	0.562	Per 1000	$280.58
275	KB-1194	200	0.625	Per 1000	$454.30
50	KB-1807	200	0.562	Per 50	$21.13
275	KB-1193	48	0.625	Per 1000	$473.00
200	KB-1196	200	0.687	Per 1000	$836.24
25	KB-1818	200	0.687	Per 25	$18.92
200	KB-1195	48	0.687	Per 1000	$870.72
160	KB-1199	200	0.750	Per 1000	$1,021.66
25	KB-1809	200	0.750	Per 25	$21.94
200	KB-1197	24	0.750	Per 1000	$993.70
160	KB-1198	48	0.750	Per 1000	$1,048.60
125	KB-552	200	0.812	Per 1000	$1,344.90
25	KB-1800	200	0.812	Per 25	$28.04
125	KB-1200	48	0.812	Per 1000	$1,400.34
100	KB-1174	200	0.875	Per 1000	$2,494.34
10	KB-1811	200	0.875	Per 10	$14.56
100	KB-1173	48	0.875	Per 1000	$2,597.00
10	KB-1835	200	0.937	Per 10	$16.86
80	KB-1176	200	0.938	Per 1000	$2,183.56
80	KB-1175	48	0.938	Per 1000	$2,272.70
80	KB-1178	200	0.969	Per 1000	$2,418.26
80	KB-1177	48	0.969	Per 1000	$2,518.60
65	KB-1170	200	1.000	Each	$2.62
65	KB-1149	48	1.000	Each	$2.74
10	KB-1814	200	1.00	Per 10	$19.72
40	KB-1139	200	1.125	Each	$5.84
40	KB-1168	48	1.125	Each	$6.08
30	KB-1141	200	1.250	Each	$7.08
30	KB-1140	48	1.250	Each	$7.38
25	KB-1143	200	1.375	Each	$11.86
25	KB-1142	48	1.375	Each	$12.36
20	KB-1145	200	1.500	Each	$13.26
20	KB-1144	48	1.500	Each	$13.82