Form: This specification covers three types of a free-machining@ corrosion-resistant steel in the form of bars@ wire@ forgings@ and forging stock. Application: Primarily for parts on which the amount of machining warrants use of a free-machining grade of steel requiring corrosion resistance similar to the 18-8 type steels but not subjected to temperatures exceeding 700? F (371? C) during fabrication or in service.