Rock Bit S-2 Tool Steel balls are designed to work well in very extreme conditions that are common when drilling deep into the ground. The balls provide the strength and toughness that is required to withstand heavy force and the abrasion of pulverized rock. These balls also have unusually good wear characteristics due to the materials hardening capabilities.

Rock Bit S-2 Tool Steel balls are manufactured for bearings that are used in well drilling, oil field drilling and equipment and offshore drilling platforms.

AISI Type S-2 Tool Steel Balls      
SIZE RANGE   ¼” (0.25) thru 1 ½ “ (1.50)  
GRADES:   100, 200  
       
CHEMICAL COMPOSITION      
CARBON   0.45% to 0.55%  
MANGANESE   0.30% to 0.50%  
MOLYBDENUM   0.30% to 0.60%  
SILICON   0.90% to 1.10%  
PHOSPHOROUS   0.030% MAX.  
SULPHUR   0.030% MAX.  
VANADIUM   0.050% MAX.  
       
MECHANICAL PROPERTIES      
TENSILE STRENGTH   310,000 psi  
YIELD STRENGTH   290,000 psi  
ELONGATION IN 2 INCHES   7%  
REDUCTION IN AREA   25%  
MODULUS OF ELASTICITY   30,000,000 psi  
DENSITY   0.283 lbs/ cubic inch  
       
PHYSICAL CHARACTERISTICS      
EXTREME WEAR RESISTANCE      
HARDNESS   54 – 60 Rockwell C  
       
GENERAL USAGE      
WELL DRILLING, OIL DRILLING