Form: This specification covers a corrosion and heat resistant steel in the form of bars@ wire@ forgings@ mechanical tubing@ and stock for forging or heading. Application: Primarily for parts@ such as turbine rotors@ shafts@ blades@ vanes@ dowels@ flanges@ and fittings@ requiring high strength up to 1300?? (705?? and oxidation resistance up to l500??(8lS0C).