ASTM A193 B7 / ASTM A320 L7
The ASTM A193 B7 / ASTM A320 L7 specification is intended for bolt applications in medium-high temperature environments.
The specification refers to a chromium molybdenum steel that has undergone heat treatment and is capable of withstanding temperatures up to 450°C (840°F).
- Excellent wear resistance
- Exceptional strength
- Exceptional toughness
- For bolting applications
While ASTM A320 L7 steel shares similar chemical and physical properties with ASTM A193 B7 steel, it is specially designed for low-temperature applications and includes additional Charpy V Notch tests conducted at -101°C (-150°F). This further testing makes the alloy steel ideal for use in environments with extremely low temperatures.
Chemical Composition (weight, %)