Alloy A320 L7 L7M Washers for valves flanges and fittings for low-temperature service
ASTM A320 L7 washers are specially engineered for LOW temperature performance. These fasteners are commonly used for valves, flanges, fittings, and pressure vessels.
The material, as represented by the tension specimens, shall conform to the requirements as to tensile properties such as tensile strength, yield strength, elongation, and hardness. The material shall meet the prescribed impact energy absorption requirements and the recommended test temperature. L7 threaded studs and short, headed bolts are readily available in the marketplace. These bolts are typically bought and sold in a plain, bare metal finish. L7 bolts are available through 2-1/2¡± in diameter. A320 Grade L7 bolts larger than 1/2¡å diameter require a Charpy impact test.