Shear Stud

Headed Shear Studs for Composite Steel-Concrete Construction

In modern composite construction, the bond between steel beams and concrete slabs is critical for structural integrity. Asia Bolts Industries LLC is a premier manufacturer of shear studs (headed stud welding connectors), engineered to provide robust shear connection and prevent slip between steel and concrete elements. Our studs are optimized for automatic arc stud welding, ensuring rapid installation and consistent weld quality in high-rise buildings, long-span bridges, and industrial facilities.

As a Saudi Aramco approved manufacturer, we supply shear studs that meet the most stringent international standards (ISO 13918, AWS D1.1). Each batch undergoes rigorous chemical analysis and mechanical testing, including bend tests to verify weldability and ductility. Whether you require standard mild steel studs for building floors or high-tensile studs for heavy bridge decks, Asia Bolts delivers certified performance with full traceability.

Technical Specifications

Why Shear Studs Are Critical for Composite Action

Shear studs act as the mechanical link between steel beams and concrete slabs:

• Load Transfer: They transfer horizontal shear forces from the concrete slab to the steel beam, allowing them to act as a single composite unit.
• Increased Stiffness: Composite action significantly increases the stiffness and load-bearing capacity of the floor or bridge deck, allowing for longer spans and lighter steel sections.
• Rapid Installation: Designed for automated stud welding guns, enabling thousands of studs to be installed per day with consistent quality.
• Slip Prevention: The headed design prevents vertical separation (uplift) between the concrete and steel under dynamic loads.

Quality Assurance & Weldability Testing

Unlike standard fasteners, shear studs must possess specific ductility to survive the welding process without cracking. At Asia Bolts Industries LLC, our QA process includes:

1. Raw Material Control: Use of cold heading quality wire (SWRCH/ML series) with controlled carbon and alloy content to ensure weldability.
2. Cold Forging: Precision forging of the head to maintain grain flow and structural integrity.
3. Bend Testing: Every heat lot undergoes a bend test (typically 30° for Grade B, 45° for Grade C) to prove the stud can withstand welding thermal shock without fracturing at the shank/head junction.
4. Macro Etch Testing: Optional macro-etch tests on sample welds to verify fusion depth and heat-affected zone (HAZ) quality.
5. Surface Preparation: Studs are cleaned and oiled to remove mill scale and rust, ensuring optimal arc initiation during welding.
6. Full Traceability: Each shipment includes an MTC EN 10204 3.1 linking the studs to the specific wire rod heat number and test results.

Installation Guidelines

For optimal performance, shear studs should be installed following these best practices:

• Surface Cleanliness: The steel beam surface must be free of paint, rust, oil, and moisture in the weld zone.
• Welding Parameters: Adjust welding gun current and time based on stud diameter and deck thickness (if using through-deck welding).
• Ceramic Ferrules: Use high-quality ceramic ferrules to contain the molten pool and shape the weld fillet.
• Visual Inspection: Inspect every weld for a complete 360° fillet. Remove any spatter that interferes with concrete bonding.
• Bend Test Verification: Perform site bend tests (as per project spec) to validate welding procedure qualifications.