DELRIN® sheets, rods & tubes have many of the same characteristics of
industrial metals such as brass, aluminum, zinc, and stainless steel.
Delrin is a homopolymer acetal (POM). Some of Delrin's comparable
properties include stiffness, dimensional stability, impact
resistance, and structural strength.
For more details on Delrin for machining of parts, try
http://www.professionalplastics.com/DELRINSHEET-ROD