Depending on the severity of the polymer flow environment, the company offers packages manufactured from a variety of base materials, including carbon steel with hardened alloy welded flight lands, nitralloy
, high chromium tool steel, tool steel, hastelloy, inconel and stainless steel.
Steve Clement, grinding supervisor, cites a common example: "We grind a nitralloy
aerospace part with six different diameters plus three flats.
Materials are Nitralloy
, 52100, 440C, 4340 and 15-5 stainless.
The Coates rotary valves are fashioned from Nitralloy
, and the face of the seal is made from a proprietary carbon-ceramic alloy.
Standard base material is 4140 heat treated steel, with available options including 4340 heat treated steel, Nitralloy
135M and all grades of stainless steel.
Other metals that exhibit toughness such as Inconel, Monel, Hastelloy, Nitralloy
, Waspaloy, Nimonic, and Udimet benefit because EDM is a noncontact process and there is no adhesion of workpiece to the tool.
Barrels are available in such materials as Nitralloy
135-nitrided, tool steels, D-2, CPM-10V, CPMT-440V, iron boron (bimetallic), carbide (bimetallic) and nickel (bimetallic).
Materials are mostly Nitralloy
Cr/Mo/Al steels, tough and very prone to work hardening, as well as cast iron parts.
and molds made of hardened steels, tungsten carbide, high-speed steel, and exotic materials like Hastelloy, Nitralloy
, Waspaloy, and Nimonic, used in aeronautical and aerospace applications.
Trial installations have produced cost and time savings that have led a major automaker to switch 60% of its drill bushing to the Nitralloy