ISO 9001-2015 EN
English
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Quality Assurance
01. End-to-End Quality Inspection & Control
Focusing on every production stage from raw materials to finished goods, ensuring direct and rigorous quality verification.
Incoming Raw Material Inspection
Raw materials must undergo strict quality testing before production to ensure compliance with standards, controlling quality at the source.
Post-Heat Treatment Sampling
After heat treatment, screws undergo random testing for hardness and mechanical properties to ensure the process meets design specifications.
In-Process Quality Audits
Sampling is conducted at key stages—such as cold heading, threading, and heat treatment—to ensure semi-finished products meet quality standards.
Surface Treatment Quality Control
Quality control for plating (zinc, nickel) or coating processes. Sampling ensures coating uniformity and strong adhesion.
Automated Quality Inspection
Utilizing automated systems for real-time monitoring and inspection of screw dimensions, thread depth, and surface finish.
Final Product Full Inspection
Comprehensive testing before shipment, including dimensional precision, mechanical performance, and corrosion resistance, ensuring 'zero-defect' quality.
Strict Non-Conforming Product Segregation
Immediate isolation and labeling of defective items. Root cause analysis and corrective actions are taken to prevent non-conforming products from entering the market.
02. Quality Management System & Continuous Assurance
Focusing on the systems, culture, and commitments that ensure long-term stable operation of the quality system, serving as the foundational support for production processes.
Quality Traceability & Feedback
Establishing a comprehensive quality traceability system to record production and inspection data for every batch, ensuring rapid response to any quality issues.
Quality Awareness & Skills Training
Regular training on quality awareness and technical skills to reinforce employees' responsibility for quality control throughout the production process.
Certified Quality Management System
Production processes strictly adhere to international industry standards, ensuring every stage meets globally recognized quality requirements.
Continuous Innovation
As a premium supplier of fastening products and solutions, Infasron is dedicated to ongoing R&D and innovation to meet evolving market and customer needs.
Professional Commitment
By choosing Infasron Fasteners, you benefit from our relentless pursuit of quality and our professional dedication to service excellence.
Infasron's production facilities have earned numerous international and industry certifications, ensuring products meet the highest global standards.
Our certifications cover the entire process from raw materials to finished goods, along with patented manufacturing technologies. This provides a solid guarantee for product safety and durability while driving continuous optimization of design and production.
Quality Management System Certification
Environmental Management System Certification
SGS General Standard Technical Services Certification
GB (China National Standard) Compliance
Product Quality
Certification
Patents & Intellectual
Property (IP)
ISO 9001-2015 EN
ISO 9001-2015
ISO 14001-2015 EN
ISO 14001-2015
ISO 45001-2018 EN
ISO 45001-2018
CE 认证
FM 认证
通过 SGS 检测
通过 FQC 检测
通过国标检测
发明专利证书
实用新型专利证书
实用新型专利证书
实用新型专利证书
实用新型专利证书
实用新型专利证书
实用新型专利证书
实用新型专利证书
外观设计专利证书
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infasron 商标注册
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CLCO 商标注册
Infasron’s real-world testing is a comprehensive, multi-dimensional verification system that serves as the cornerstone of industrial safety. Beyond mere static strength, our fasteners are engineered to endure extreme conditions—including dynamic loading, fire, and severe corrosion. By bridging the gap between lab results and real-world performance, we ensure the structural resilience of skyscrapers and sea-crossing bridges, providing an indispensable guarantee for modern steel engineering.
Long-term
Reliability
Test
Environmental Durability (Weathering) Testing
Evaluates the aging of screw coatings and base materials under prolonged outdoor exposure.
UV Aging Test: Simulates UV radiation to test coating resistance (e.g., color zinc, powder coating) against chalking, discoloration, and peeling.
Damp Heat Test: Simulates high temperature and humidity to check for corrosion, coating blistering, and loss of adhesion.
High/Low Temperature Thermal Cycling Test: Cycles screws between extreme temperatures to assess if thermal expansion and contraction cause coating cracks, thread damage, or performance degradation.
Environmental Corrosion Testing
Simulates various natural environments or specific working media to verify corrosion resistance.
Neutral Salt Spray (NSS) Test: The most common accelerated corrosion test; simulates marine or salt-laden atmospheres to evaluate plating and material resistance.
CASS Test: A more severe test than NSS, primarily used for rapid evaluation of decorative plating performance.
Cyclic Corrosion Testing (CCT): Simulates real-world wet/dry cycles, providing a more accurate reflection of actual corrosion than continuous salt spray.
Acid Rain / $SO_2$ Corrosion Test: Simulates corrosive environments such as industrial acid rain or atmospheric pollution.
Stress Corrosion Cracking (SCC) Test: Evaluates the susceptibility of high-strength steel screws to brittle fracture under combined tensile stress and corrosive media.
Basic
Performance and
Accuracy Test
Mechanical Performance Testing
This is the most fundamental and critical set of tests used to verify the strength, toughness, and reliability of the screws.
Tensile (Strength) Test: Measures the maximum load a screw can withstand under axial tension before breaking. This is the core indicator of its holding power.
Hardness Test: Uses methods such as Rockwell (HRC) and Vickers (HV) to measure surface and core hardness, ensuring sufficient strength to resist deformation and wear.
Torque-Tension Test: Measures the clamping force generated by a specific torque and the torque required to reach a target clamping force. This is vital for assembly quality control and preventing loosening.
Head Soundness Test: Applies a heavy load to the screw head to verify its load-bearing capacity and resistance to detachment.
Fatigue Test: Applies cyclic loads to the screw to simulate long-term performance under vibration, determining the fatigue limit and predicting service life.
Dimensional and Geometric Accuracy Measurement
Ensures that screws can be smoothly and correctly assembled.
Major Dimensions: Measurement of major diameter, thread pitch, length, head dimensions, and width across flats.
Geometric Tolerances: Thread Go/No-Go gauge testing, concentricity of head to shank, thread flank angle, etc.
Surface Defects: Inspection for cracks, burrs, laps, and dents. Magnetic particle or eddy current testing is often used to detect microscopic surface and near-surface cracks.
Material Composition,
Properties and Special
Environment Testing
Chemical Composition and Metallographic Analysis
This stage ensures quality control at the essential material level.
Chemical Composition Analysis: Uses spectrometers and other equipment to detect the elemental makeup of the screw material, ensuring compliance with standards (e.g., content of Carbon, Chromium, Nickel, Molybdenum, etc.).
Metallographic Analysis: Screws are sectioned and observed under a microscope to examine their microstructure (such as grain size, inclusions, carburized layer depth, and decarburization depth) to evaluate the heat treatment process. Excessive decarburization depth can severely weaken the surface strength and fatigue life of the screw.
Special Application Scenario Testing
Targeted testing is conducted based on the specific end-use environment of the screws.
Seismic Resistance Test: Used for safety-critical areas such as buildings, bridges, and nuclear power plants to simulate performance under extreme earthquake loads. Steel structures in high-seismic zones must verify the ductility and energy dissipation capacity of their joints under repeated seismic waves.
Fire Resistance Test: Measures the duration a screw can maintain strength and connectivity in high-temperature fire environments. Fire is a major threat to steel structures; as steel strength drops sharply at high temperatures, fasteners must maintain their function for a specific time to allow for evacuation and rescue.
Stress Corrosion Cracking (SCC) Sensitivity Test: Specifically for steel structures near bridges, coastal areas, or chemical plants. Fasteners in these environments endure the combined effects of high tensile stress and corrosive media, making them highly susceptible to brittle fracture.
Fatigue Performance Testing: Applied to steel structures bearing dynamic loads, such as bridges, crane beams, and wind turbine towers. Fasteners in these structures must withstand millions or even billions of alternating stress cycles.
Add: Building 10-A, Plot No. 11, Zhongnan High-tech Industrial Park, Jianghai Linkage Development Demonstration Zone, Tongzhou Bay, Jiangsu, P.R. China
Email: IFS@infasron.cn | Fax: +86-0513-82566650
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