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.
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for Ball Terms and Definitions (Grades Available and Tolerances)
|
Material
|
AISI
|
Federal
|
ASTM
|
UNS
|
|
S-2 Steel
|
S-2
|
QQ-T-570
|
A681
|
T-4190
|
|
Mechanical Properties
Hardness as measured on parallel flat surfaces is
Rockwell C 55-58.
|
|
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
|
|
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