This specification covers a corrosion and heat resistant steel in the form of work-strengthened bars and wire 1-1/4 inches (31.8 mm) and under in nominal diameter or least distance between parallel sides. These bars and wire have been used typically for parts, such as fasteners, requiring room- temperature minimum tensile strength of 160 ksi (1103 MPa) after precipitation heat treatment for use up to 1000 °F (538 °C) and having oxidation resistance up to 1200 °F (649 °C), but usage is not limited to such applications.