Form

This specification covers two types of free-machining, corrosion and heat-resistant steel in the form of bars, wire, forgings, and forging stock.

Application

These products have been used typically for parts requiring hardness up to 35 HRC on which the amount of machining warrants use of a free-machining grade of steel with oxidation resistance up to 1000 °F (538 °C), but usage is not limited to such applications. The product is useful at the higher temperatures only when stresses are low.

Classification

The steels covered by this specification are classified as follows:

Type 1 - 12.5Cr - 0.27Se (UNS S41623)

Type 2 - 12.5Cr - 0.28S (UNS S41600)

Unless a specific type is ordered, either type may be supplied.