steel studbolt grade B7 size 1/2 inch 18 centimeters , Iran

The B7 steel stud bolt, 1/2 inch in diameter and 180 mm in length, weighs approximately 0.35 kg. The thread pitch is 1.27 mm with a 60-degree thread angle. The outer thread diameter is 12.7 mm, and the root diameter is 10.5 mm. Made of alloy steel with a tensile strength of 1250 MPa and hardness between 32–36 HRC, it can withstand a tensile load of up to 45 kN and an installation torque of 50 N·m. Corrosion resistance is enhanced through galvanization and heat treatment according to ASTM A193 standards.

The tensile specifications of the B7 stud bolt are designed for flange and industrial equipment connections. The threaded engagement length is 120 mm, with a minimum critical tensile load of 40 kN. It can handle dynamic tensile loads up to 35 kN and bending stress up to 8 MPa. Operational temperature ranges from 20 to 250°C. Using lubricants and gradual tightening reduces extra stress and metal fatigue. Optimized weight and precise thread pitch ensure uniform stress distribution and increased connection lifespan under heavy-duty operational conditions.
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