These nuts have good chemical resistance and may be mildly magnetic. they maintain their strength in high-pressure and high-temperature environments and are used with astm a193 bolts to fasten pressure tanks, valves, and flanges. also known as heavy hex nuts, they are about 10% wider and taller than standard hex nuts and distribute the load over a large area.
Astm a193 b7 is a bolting specification for medium-high temperature applications. it is a heat treated chromium molybdenum steel and is considered for applications up to 450° celsius (840° fahrenheit). astm a320 l7 has the same chemical and physical properties as b7, with additional charpy v notch tests taken at -101° celsius (-150° fahrenheit) for low temperature applications.
Total quality management at our end, has enabled us in providing our patrons with a fault free product, where the entire range of our astm a320 grade l7m alloy steel stud bolt is checked on stringent parameters to ensure quality. the high content of lead in astm a320 grade l7m as bolt results in a relatively low ductility and plasticity.
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