What is ASTM A193? Grades of ASTM A193 Material (PDF)

ASTM A193 is a standard specification established by the American Society for Testing and Materials (ASTM) that defines the requirements for alloy and stainless steel bolting materials for high-temperature or high-pressure service and other special applications. This standard covers a wide range of fasteners, including bolts, screws, studs, and other externally threaded fasteners used in pressure vessels, valves, flanges, and fittings for various industries, such as petrochemical, power generation, oil and gas, and many more.