MODUK DTD-939 PDF

Scope and application

This specification covers the requirements for the silver plating of:

threaded parts made from austenitic or ferritic/martensitic corrosion-resisting steels of mini-mum specified tensile strength not exceeding 90 tonf/in2 (142 kgf/mm2) 

threaded parts made from heat-resisting nickel-base alloys, and

wire thread inserts made from heat-resisting nickel-base alloys, for the purpose of preventing seizure after use at elevated temperatures.

The plating is not applied as a protection against corrosion.

Processing may if desired be carried out to a Works Process Specification accepted by the Inspecting Authority as meeting the mininium requirements of this specification.