A193-11a

Scope
1.1 This specification² covers alloy and stainless steel bolting for pressure vessels, valves, flanges, and fittings for high temperature or high pressure service, or other special purpose applications. Bars and wire shall be hot-wrought and may be further processed by centerless grinding or by cold drawing. Austenitic stainless steel may be carbide solution treated or carbide solution treated and strain-hardened. When strain hardened austenitic steel is ordered, the purchaser should take special care to ensure that Appendix X1 is thoroughly understood.
² – For ASME Boiler and Pressure Vessel Code applications, see related Specification SA-193 in Section II of that Code.
NOTE 2—For grades of alloy-steel bolting suitable for use at the lower range of high temperature applications, reference should be made to Specification A354.

1.2 Several grades are covered, including ferritic steels and austenitic stainless steels designated B7, B8, and so forth. Selection will depend upon design, service conditions, mechanical properties, and high temperature characteristics.

Table 1: Chemical Requirements - Ferritic Steels

Table 1: Chemical Requirements - Austenititc Steels

Table 2: Mechanical Requirements - Ferritic Steels

Table 2: Mechanical Requirements - Austentitic Steels

ASTM A193-11a was approved on Nov 1 2011.