STAINLESS STEEL- ball and seat are made from a series 400C stainless steel and are oil quenched and tempered to develop good abrasion and moderate corrosion resistant properties. ALLOY- non-ferrous, non-magnetic cobalt-chromium tungsten alloy in which very hard, microscopic carbides are uniformly distributed in a tough, shock resistant matrix. The result is a ball and seal with exceptional resistance to both abrasion and corrosion TITANIUM CARBIDE-a powdered metal material, not a cast material as found in alloy, this ball is homogeneous throughout, the outside skin is the same as its core, one of the reasons it earns a Rockwell hardness rating of 90. Titanium has more abrasion resistance, will not deform, and has better pitting resistance than alloy. TUNGSTEN CARBIDE-excellent abrasion and corrosion resistant properties, carbide balls and seats are recommended for the most abrasive fluids. ZIRCONIA-made from partially stabilized Zirconia, valued for its unique properties of inertness, high temperature stability, strength and toughness. Corrosion and impact resistant. SILICON NITRIDE (DURABALL)-Si3N4 is light, hard and has low thermal expansion coefficient. It has high mechanical strength, fracture toughness, and it is resistant to deformation. Particularly resistant to corrosion and abrasion. NICKEL CARBIDE-nickel binder material is advantageous when both corrosion and wear resistance are required. This material suited for more impact when compared to other Nickel grades.