Special Piping Materials has always been at the forefront of the industry due to the company�s determination to supply its clients with the materials grades that best suit their requirements. An example of the range of materials we supply are as follows: Super Duplex (S32760 and S32750 / 2507) Duplex (S31803 / 2205) 6% Moly (S31254) Nickel Alloys (Alloy 400, 625, 800, 825, etc) Stainless Steels (316L, 304L, 904L, 310, 321, etc.) Read on for further information about each type of material.