ASTM A193 Grade B7M pegs, ASTM A193 B7 It is a version that has undergone heat treatment at a low hardness level. This class is specially heat treated with a limited hardness value to prevent risks such as hydrogen embrittlement. This ensures a secure connection in applications that operate under high pressure but require safety sensitivity.
Grade B7M, is generally preferred in environments with high hydrogen concentrations, petrochemical plants, refineries, and flange connections requiring high security.
| Feature | |
| Standard | ASME |
| Material | Alloy Steel |
| Type | Stud Bolt |
| Quality | ASTM A193 Grade B7M |
| 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) |
- Petrochemical and refinery equipment
- Natural gas and hydrogen systems
- Flange connections
- High-pressure piping systems
- Valve and fitting installations
- Connections for safety purposes in acidic and hydrogen-rich environments
- 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
It is used in flanged connection systems in high-pressure applications where safety is paramount in hydrogen environments.
No. However, it is typically used with compatible nuts such as ASTM A194 Grade 2HM or 7M and ASTM F436 washers.
B7 fasteners have high hardness and strength. B7M, although made from the same material, has undergone heat treatment to achieve lower hardness. This reduces the risk of hydrogen embrittlement.
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