ASTM A193 Grade L7M, These are bolts made of alloy steel, developed for use at low temperatures. L7M, While possessing the mechanical properties of the L7 class, due to the requirement for lower hardness and tensile strength hydrogen cracking It is preferred in applications with high security sensitivity where such risks are prevented. It maintains its mechanical integrity even at low temperatures such as -100 °C.
| Feature | |
| Standard | ASME |
| Material | Alloy Steel |
| Type | Stud Bolt |
| Quality | ASTM A 320 GR L7M |
| Coating | Electrogalvanized (White/Yellow), Hot-Dip Galvanized (HDG), Nickel, Black Oxide, Geomet, PTFE |
| Tooth Type | Metric Coarse Thread, Metric Fine Thread – UNC / UNF (Inch) |
| Measurement Range | From M10 to M100, 1/2″-3″ |
| Production Method | Grinding or machining |
| Thread Direction | Right-Hand Thread (standard) / Left-Hand Thread (upon request) |
- Cryogenic systems and low-temperature applications
- Natural gas and LNG facilities
- Pressure vessel and tank connections
- Petrochemical and refinery equipment
- Energy production systems
- Gas piping systems and valve installations
- ISO 9001:2015 Quality Management System
- ISO 14001:2015 Environmental Management System
- ISO 45001:2018 Occupational Health and Safety Management System
- EU Declaration of Conformity (PED) certificate (Compliance with the Pressure Equipment Directive)
- Our production processes, DIN, EN, ISO, and ASTM is fully compliant with the standards
- Upon request EN 10204 3.1 certificate is provided
ASTM A193 Grade B7 is a high-strength stud bolt used in high-temperature and high-pressure systems. It is frequently preferred in flange connections.
L7 fasteners offer high mechanical strength, while the L7M class has lower hardness. This prevents risks such as hydrogen embrittlement and ensures safer connections.
Natural gas, LNG, and cryogenic systems operating at low temperatures down to -100 °C are typically used in pressurized systems where safety measures are critical.
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