ASTM A453 tensile test on stress rupture steel fasteners covers five grades of bolting with twelve classes of yield strength ranging from 50 to 120 ksi for use in high-temperature service such as fasteners for pressure vessel and valve flanges. The material requires special processing and is not intended for general purpose applications. ASTM A453 tensile test on stress rupture steel fasteners specifies standards for Grade 660, equivalently Class A, B, C, and D, Grade 651, equivalently Class A and B, Grade 662, equivalently Class A and B, and Grade 665, equivalently Class A and B, of bolting materials for use in high-temperature service such as fasteners, for pressure vessels and valve flanges.
Bolting materials in the ASTM A453 specification covers rolled, forged, or hot-extruded bars, and also bolts, nuts, screws, washers, studs, and stud bolts. Materials shall be subjected to tension, stress-rupture, and hardness tests. ASTM A453 requires that materials shall conform to yield strength, tensile strength, elongation, reduction of area, Brinell hardness, and Rockwell hardness requirements. Hardening and solution treatment requirements for each material class are also given with the ASTM A453 tensile test on stress rupture steel fasteners.
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