ASTM A193 B7 & A320 L7 Stockholder
ASTM A193 B7 is a Bolting specification for medium-high temperature applications. It is a heat treated Chromium Molybdenum steel and is considered for applications up to 450⁰ Centigrade (840⁰ Fahrenheit). L7 has the same chemical and physical properties as B7, with additional Charpy V Notch tests taken at -101⁰ Centigrade (-150⁰ Fahrenheit) for low temperature applications. Steel is manufactured via Electric Arc Furnace, continuously cast followed by heat treatment and Bright conversion. It is typically used for the manufacture of Bolts, Fasteners, Studs and Studbolts in the Petrochemical industry. Available Drawn or Turned depending on the size in both Metric and Imperial sizes in standard and Thread Rolling Diameters. Typical stock size range 8mm to 4” Diameter in B7/L7 and 110mm to 130mm Diameter B7 only.