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S-2 Rockbit Balls

S2 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

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

� copyright 2005 Hoover Precision Products, Inc., All Rights Reserved

-

 

Rockbit Balls

Click Here for Ball Terms and Definitions (Grades Available and Tolerances)

Balls per Pkg Stock # Grade # Diameter  Price/Pkg
40000 KB-1219 200 0.187 $1497.60
100 KB-1802 200 0.187 $4.73
40000 KB-1218 48 0.187 $1560.00
4350 KB-1221 200 0.250 $280.84
100 KB-1803 200 0.250  $8.62
4350 KB-1220 48 0.250 $292.41
3000 KB-1213 200 0.281 $278.64
3000 KB-1192 48 0.281 $290.16
2200 KB-1182 200 0.312 $168.43
100 KB-1804 200 0.312  $13.34
2200 KB-1211 48 0.312  $228.93
1300 KB-1184 200 0.375  $148.04
1300 KB-1183 48 0.375  $154.15
1300 KB-1186 200 0.406  $185.48
1300 KB-1185 48 0.406  $193.13
810 KB-1188 200 0.437  $134.43
810 KB-1187 48 0.437  $139.97
50 KB-1805 200 0.437  $13.50
550 KB-1201 200 0.500  $107.65
50 KB-1806 200 0.500  $16.70
550 KB-1189 48 0.500  $165.08
380 KB-1181 200 0.562  $102.40
380 KB-1191 48 0.562  $106.62
275 KB-1194 200 0.625  $124.93
50 KB-1807 200 0.562  $21.13
275 KB-1193 48 0.625  $130.08
200 KB-1196 200 0.687  $167.25
25 KB-1818 200 0.687  $18.92
200 KB-1195 48 0.687  $174.14
160 KB-1199 200 0.750  $163.47
25 KB-1809 200 0.750  $21.94
200 KB-1197 24 0.750  $198.74
160 KB-1198 48 0.750  $167.78
125 KB-552 200 0.812  $168.11
25 KB-1800 200 0.812  $28.04
125 KB-1200 48 0.812  $175.04
100 KB-1174 200 0.875  $249.43
10 KB-1811 200 0.875  $14.56
100 KB-1173 48 0.875  $259.70
10 KB-1835 200 0.937  $16.86
80 KB-1176 200 0.938  $174.68
80 KB-1175 48 0.938  $181.82
80 KB-1178 200 0.969  $193.46
80 KB-1177 48 0.969  $201.49
65 KB-1170 200 1.000 $170.30
65 KB-1149 48 1.000 $178.10
10 KB-1814 200 1.00  $19.72
40 KB-1139 200 1.125 $233.60
40 KB-1168 48 1.125 $243.20
30 KB-1141 200 1.250 $212.40
30 KB-1140 48 1.250 $220.14
25 KB-1143 200 1.375 $296.50
25 KB-1142 48 1.375 $309.00
20 KB-1145 200 1.500 $265.20
20 KB-1144 48 1.500 $276.40
 

Prices are subject to change due to fluctuating market conditions.

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