Form: This specification covers a corrosion and heat resistant steel in the form of bars@ wire@ forgings@ mechanical tubing@ flash welded rings@ and stock for forging or flash welded rings. Application: Primarily for parts requiring good corrosion resistance and which with be subjected to elevated temperatures during fabrication or in service. For parts requiring oxidation resistance up to 2000??(1095?? but useful at the higher temperatures only when stresses are low. Strength at elevated temperatures is similar to that of the 18-8 type steels. The specified silicon content improves oxidation resistance with some sacrifice of weldability and ductility.