Hot Rolled Clamp Screw

Hot Rolled Clamp Screw - High-Strength Fastening Solution for Heavy-Duty Construction 

Shandong Xingrui Building Materials Co., Ltd. manufactures the Hot Rolled Clamp Screw using premium 45# steel through advanced hot-rolling and quenching processes. Our Φ36mm clamp screws deliver tensile strength exceeding 600MPa, specifically engineered for heavy-load wall formwork reinforcement in large-scale construction projects.

We have been producing since 2007, for over 15 years, with a facility of 79,800 square meters, 180 competent experts, 5 semi-automatic forging lines and 12 welding robots. All our products are subject to stringent quality controls in accordance with ISO9001, ISO14001 and CE certification requirements, while guaranteeing consistency in over 100 markets worldwide.

Hot rolling generates a continuous grain flow across the fastener, avoiding the internal stress concentrations of machined options. This means great shear resistance and load capacity, which does not fracture and deform under strong hydraulic pressure.

Technical Specifications of Hot Rolled Clamp Screw

Superior Material Properties & Performance

The 45# steel composition provides optimal balance between hardness and ductility for construction environments. Through controlled hot-rolling above recrystallization temperature, your clamp screws achieve uniform mechanical properties throughout the cross-section.

We improve the internal metallurgical structure by quenching and tempering process. This two-stage process provides higher impact resistance than cold-formed fasteners, and maintains thread integrity in high torque repeat applications.

The coarse thread profile is spaced even farther, and will naturally push out concrete dust and debris during installation. You won't have the jamming problems associated with fine threaded versions saving you labour expenses and on site installation time.

Exacting Construction Applications

Concrete Formwork Systems the product is the principal tension member used in wall formwork assemblies. These fasteners can endure hydrostatic pressure up to several tonnes per square metre when pouring concrete for high-rise structures, and at the same time, they can preserve dimensional correctness throughout the curing process.

Bridge & Tunnel Shoring When you have massive infrastructure projects that need changeable support systems that can take dynamic stresses. Our clamp screws provide dependable gripping force in falsework applications that need exceptional fatigue resistance from vibration caused by construction equipment.

Railway Fastening Systems Track maintenance activities rely on fasteners that provide uniform clamping pressure over temperature fluctuations and environmental exposure. These are permanent installations and the hot-rolled grain structure gives long-term stability.

Industrial Steel Structure Assembly: For temporary or permanent steel structure assemblies, these clamp screws provide the holding power needed for structural connections that are subject to wind loads and seismic forces.

Quality Assurance & Inspection Protocol

Every batch undergoes comprehensive testing before shipment to your project site. Our quality control laboratory performs tensile and yield strength verification using universal testing machines calibrated to international standards.

Hardness testing with Rockwell equipment ensures uniform heat treatment results. We employ Go/No-Go thread gauges to verify dimensional accuracy, guaranteeing interchangeability with standard formwork nuts and hardware systems.

Magnetic Particle Inspection detects any surface discontinuities formed during the hot-rolling process. For corrosive environments, we conduct salt spray testing per ASTM B117 to validate coating performance over extended exposure periods.

Your production team receives detailed mill test certificates documenting chemical composition analysis and mechanical property results for Hot Rolled Clamp Screw. This traceability supports your quality management requirements and regulatory compliance obligations.

Installation & Maintenance Guidelines

Proper Storage: Keep your clamp screws in dry conditions protected from direct ground contact. While the surface treatment provides corrosion resistance, proper storage extends service life and maintains thread cleanliness.

Pre-Installation Inspection: Before each use cycle, visually examine threads for elongation or deformation. Run a pitch gauge along the thread profile to verify dimensional integrity after previous applications.

Torque Application: Follow your formwork system manufacturer's specifications for tightening torque. The self-cleaning thread design allows hand-starting of the nut, with final tightening using calibrated tools to achieve specified clamping force.

Reuse Criteria: You can safely reuse these fasteners for multiple projects when they pass visual and dimensional inspection. Discard any units showing thread stretching, visible cracks, or difficulty in nut rotation, as these indicate approaching fatigue limits.

Surface Maintenance: After removal from formwork, wire-brush the threads to remove concrete residue. For galvanized versions, avoid aggressive mechanical cleaning that damages the protective zinc layer.

FAQ

Q: Why should you choose hot-rolled over cold-formed clamp screws for heavy construction?

A: Hot rolling produces larger diameters with deeper thread profiles and superior grain orientation. This manufacturing method significantly reduces thread stripping risk under the extreme torques your heavy-duty clamping applications require.

Q: How many times can you reuse these fasteners?

A: They're designed for multiple construction cycles. After each use, perform visual inspection for elongation and verify thread condition with a pitch gauge before deploying them on your next project.

Q: What explains the self-cleaning thread functionality?

A: The coarse hot-rolled thread profile incorporates wider spacing between threads. During tightening, this design pushes concrete dust, mud, and ice outward rather than allowing debris to jam between nut and screw surfaces.

Q: Does hot-dip galvanizing affect thread fit tolerance?

A: Professional manufacturers like Xingrui account for the 40-70 micron zinc coating thickness during initial manufacturing. We adjust tolerance offsets to ensure smooth nut operation after the galvanizing process.

Q: What warning signs indicate fatigue failure approaching?

A: Watch for visible thread stretching, increased resistance when hand-turning the nut, or microscopic surface cracks. Dye Penetrant Inspection provides definitive detection of these early failure indicators before catastrophic failure occurs.

Q: Can these screws perform in extreme temperature environments?

A: Yes, the hot-rolled microstructure maintains mechanical properties from -40°C to +60°C. This range covers most construction environments without brittleness risks associated with cold-worked fasteners at low temperatures.

Contact Us

Ready to enhance your formwork system reliability with Hot Rolled Clamp Screw? Contact us today at sdxingruiqp@126.com to discuss your heavy-duty fastening needs and receive customized quotations for volume orders.