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Specification Specific Gravity Hardness Shore Normal Condition Max Temp. Resistance ° C Water Absorption Cold Resistance Colour
Polyamide - A
(Nylon-PA)
1,13 80 (D) 100° C 120° C 3% very good white
Hostaform-C
(Delrin-POM)
1,45 80 (D) 100° C 140° C minimum upto -40° C white
Teflon
(PTFE)
2,10 60 (D) 260° C 300° C absent very good white

GRADES & TOLERANCES

GRADE  Sphericity Tolerance Surface
um. Micro-Inches um. Micro-Inches  
I 12.5 500 +/-12.5 +/-500 Polished
II 25.0 1000 +/-25 +/-1000 Polished
III 125.0 5000 +/-125 +/-5000 Unpolished

* These characteristics are given by plastic ball manufacturers. they can differ on the types of production cysle.

CORROSION RESISTANCE CHARTS
PLASTIC MATERIAL Nylon Delrin PTFE
Acetylene + + +
Ethanol + + +
Ethelene Glycol + + +
30% Ammonia + + +
Ammonium Chloride + + +
Arsenic Acid + + +
(Lead Free) Gasoline + + +
High-Test Gasoline + + +
Javel Water - - +
Hydrochloric Acid - - +
30% Acetic Acid - ± +
Natural Gas + + +
Vinegar + + +
Greases, Eatable Oil + + +
Formaldehyde ± + +
Fuel Oil + + +
Isopropanal + + +
Sea Water + + +
Methanol ± + +
Milk + + +
Conc, Lactic acid - + +
Mineral Oil + + +
Caustic Soda + ± +
Ozone ± - +
Oil (Kerosene) + + +
Phenol - +
Phosphoric Acid - - +
Liquid Propane + + +
Conc, Nitric Acid - - +
Hydrochloric Acid - - +
10% Hydrochloric Acid - - +
95% Foming Sulphuric Acid - +
Water, Spring Water + + +
hydrogen + + +
Tartaric Acid + ± +
Xylene + + +
+ = Resisting / ± = Resisting under reserve factor / • = Soluble
 
   
 
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