The ASTM A193 B8m Bolts specification covers both alloy steel as well as stainless steel bolting material. The bolting produced from ASTM A193 Grade B8m Bolts are meant to be used for applications in pressure vessels, valves, flanges, and fittings. Typically, the ASTM A193 B8m Class 1 Bolts is used for high temperature or high pressure service, as well as for other special purpose applications. Ferritic steels which fall under the ASTM A193 Grade B8m Class 2 Bolts category must be properly heat treated as, what best suits the high temperature features of each grade. Immediately after rolling or forging, the bolting ASTM A193 B8m Torque material has to be allowed to be cooled.