ASTM A193 Alloy-Steel and Stainless Steel Bolting Materials for High-Temperature Service
ASTM A193 covers alloy and stainless steel bolting material for pressure vessels, valves, flanges, and fittings
for high-temperature service.The term bolting material as used in this specification covers bars, bolts, screws, studs, stud bolts, and wire. Bars and wire shall be hot-wrought. The material may be further processed by centerless grinding or by cold rawing. 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 of this standard is thoroughly understood.
Grades and UNS Designationin in ASTM A193
Ferritic Steels
B5 5% Chromium
B6 and B6X 12% Chromium
B7, B7M Chromium-Molybdenum
B16 Chromium-Molybdenum-Vanadium
Austenitic Steels
B8, B8A S30400 (304)
B8C, B8CA S34700 (347)
B8M, B8MA, B8M2, B8M3 S31600 (316)
B8P, B8PA S30500
B8N, B8NA S30451 (304N)
B8MN, B8MNA S31651 (316N)
B8MLCuN, B8MLCuNA S31254
B8T, B8TA S32100 (321)
B8R, B8RA S20910
B8S, B8SA S21800
B8LN, B8LNA S30453
B8MLN, B8MLNA S31653