Salem Specialty Ball Company
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Polypropylene Balls
Specific Gravity 0.902
Water Absorbtion (Method A, 24hr)% 0.2
Tensile Strength at Yield, 100 psi 5.07
Elongated at Yield, % 12
Elastic Modulus In Tension, 10 to the 5th power psi -----
Flexural Strength in Tension, 10 to the 5th power psi -----
Elastic Modulus in Flexure, 10 to the 5th power psi 25
Compressive Strength at Yield, 1000 psi -----
Rockwell Hardness (Method A) 99, R80-102
Maximum Service Temperature in F 230
Natural Color milky white
Color Possibilites unlimited
Clarity translucent
 

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