B7 Studs
B7 Studs, manufactured to ASTM A193 Grade B7 specifications, are high-tensile, heat-treated alloy steel fasteners designed for high-pressure, high-temperature (HPHT) environments. These full-threaded studs provide exceptional strength, fatigue resistance, and thermal stability, making them ideal for oil & gas pipelines, power plants, chemical processing, and structural applications.
At Rajal Industries, we produce precision-engineered ASTM A193 B7 Studs, ensuring consistent mechanical properties, corrosion protection, and long-term durability in critical fastening applications.
Sizes & Standards
| Size Range | Standards |
|---|---|
| Metric: M6 to M100 | ASTM A193 B7 – Standard for high-tensile alloy steel studs |
| Imperial: 1/4" to 3" | ASTM A193 B7 – Standard for full-threaded & double-ended studs |
| ISO 898-1 – International standard for mechanical properties of threaded studs |
Material & Strength Grades
| Material Type | Available Strength Grades | Industry Standards |
|---|---|---|
| Alloy Steel (Quenched & Tempered) | ASTM A193 Grade B7 | ASTM A193, ISO 898-1 |
| Carbon Steel (High-Tensile Strength) | ASTM A193 Grade B7 | ASTM A193, ISO 898-1 |
| Hardened Steel (High Load Capacity) | Custom Grades | ASTM A193 |
- Heat-Treated for Maximum Strength –B7 studs undergo quenching and tempering at elevated temperatures, ensuring superior hardness, impact resistance, and mechanical reliability.
- Load Ratings Based on Material & Application:
- ASTM A193 Grade B7 Stud (Alloy Steel): 800-900 MPa tensile strength
- ASTM A193 Grade B7 Stud (Carbon Steel): 700-800 MPa corrosion-resistant strength
B7 Stud Design & Engineering Features
Fully Threaded & Double-Ended Options for Versatile Use
- Full-Threaded B7 Studs – Provide continuous threading for adjustable, high-load applications.
Double-Ended B7 Studs – Have threads on both ends, allowing secure fastening with nuts in flanged connections.
Superior Load-Carrying & Vibration Resistance
- Designed for high-stress, high-temperature conditions.
Ensures uniform load distribution in structural, piping, and anchoring applications.
High-Temperature & Corrosion Resistance
- Suitable for operating temperatures up to 450°C (840°F).
Can be coated or plated for enhanced resistance against oxidation, moisture, and chemical exposure.
Precision Threading for Secure Engagement
- Threads are machined to tight tolerances, ensuring secure fastening in industrial applications.
Available in UNC (Unified Coarse), UNF (Unified Fine), and metric thread profiles.
Compatible with Various Nuts & Fastening Systems
- Heavy Hex Nuts (ASTM A194 GR2H, GR4, GR7) – Used for high-strength bolted flange connections.
Structural Washers & Flanges – Ensures secure and stable bolted connections in extreme conditions.
Thread Specifications & Precision Engineering
| Thread Type | Description | Application |
|---|---|---|
| Coarse Thread (UNC/Metric) | Ensures fast engagement and high load resistance | Industrial bolting, pressure vessels, pipelines |
| Fine Thread (UNF/Metric Fine) | Provides higher tensile strength & precise load transfer | Aerospace, turbines, refinery plants |
| Fully Threaded B7 Studs | Allows maximum adjustability and secure fastening | Oil rigs, boiler assemblies, heat exchangers |
| Double-Ended B7 Studs | Offers better torque resistance & long-term stability | Power plants, structural anchoring |
Thread Fitment & Compliance
- Metric threads conform to ISO 6g tolerances, ensuring tight engagement and torque control.
- Imperial B7 studs meet ASTM A193 specifications for industrial and structural applications.
Common Applications of B7 Studs
- Oil & Gas Refineries & Petrochemical Plants – Used in high-pressure flange bolting, heat exchangers, and pipelines.
- Power Plants & Renewable Energy – Provides secure fastening in turbines, boilers, and generator assemblies.
- Offshore & Marine Engineering – Ensures corrosion-resistant fastening in offshore platforms and marine structures.
- Steel & Structural Engineering – Used in heavy steel frameworks requiring high-tensile studs.
- Chemical Processing & Industrial Machinery – Provides long-term durability in chemical reactors, storage tanks, and industrial furnaces.
Why Choose Rajal Industries for B7 Studs?
Manufactured to ASTM A193 Standards
Ensuring precision engineering, high-strength performance, and durability.
High-Tensile Strength for Extreme Conditions
Engineered for high-pressure, high-temperature applications.
Custom Coatings & Plating Options
Available in zinc-plated, hot-dip galvanized, PTFE-coated, and black oxide finishes.
Bulk & Custom Orders
Ideal for power plants, oil refineries, and structural engineering applications.
Stringent Quality Control
Each batch undergoes torque testing, thread fitment verification, and tensile strength assessment.
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Our Offices
C-204, Vaibhav Platina, Nr. Kaveri Trishra, S P Ring road, Shilaj, Ahmedabad, Gujarat-380054
Call us
+91-846 036 2030
Email Us
rajalfast@gmail.com sales@rajalindustries.com