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Alloy A193 B7 A194 2H Washers suitable for the use in pressure vessel service

B7 and B7M shall be heat treated by quenching in a liquid medium and tempering. For B7M fasteners, the final heat treatment, which may be the tempering operation if conducted at 1150 ¡ãF [620 ¡ãC] minimum, shall be done after all machining and forming operations, including thread rolling and any type of cutting.

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Depending on your unique project requirement needs, grade B7 bolts can be used in numerous types of extreme conditions. This specification includes fasteners intended for use in pressure vessels, valves, flanges, and fittings. Although, this material is often available in national coarse (UNC) thread pitches, if being used in traditional applications, threads are specified 8 threads per inch (tpi) for diameters above one inch. When ASTM a193 is identified as part of an architect¡¯s, engineer¡¯s, or company¡¯s specifications, then it needs to be used. This particular specification, ASTM a193, includes fasteners that have a standard specification for alloy steel and stainless steel bolting. Heat treated chromium-molybdenum steel recommended for medium high temperature service. (Liquid quench -50¡ã to 900¡ã F, Air quench -40¡ã to 900¡ã F)

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