full threaded hex bolt DIN933 A320 L7 hex bolt alloy bolt
The ASTM A320 specification, originally approved in 1948, covers alloy steel and stainless steel bolting materials for low temperature service.
This standard covers rolled, forged or strain hardened bars, bolts, screws, studs and studs for pressure vessels, valves, flanges and fittings. This is the most common A320 bolt grade. A320 Grade L7 bolts and studs are made of alloy steel containing chromium, manganese and molybdenum. The bolts undergo a heat treatment process to achieve their desired mechanical properties. ASTM A320 L7 Stud This is the most common A320 bolt grade. A320 Grade L7 bolts and studs are made of alloy steel containing chromium, manganese and molybdenum.