Product Introduction
B11-2912011 Premium-grade Stable Cost-effective Coil Spring for Chery
Our Coil Spring is a core suspension component engineered to deliver stable, long-lasting performance. It effectively reduces road vibrations, maintains optimal ride height, and enhances driving safety and comfort—critical for smooth vehicle operation.
Backed by 15+ years of auto parts R&D experience, the spring undergoes 1,000,000+ fatigue tests, ensuring a service life of over 80,000km. With a load tolerance of ±2%, it meets ISO 9001 and IATF 16949 standards, crafted from high-strength spring steel for anti-corrosion and wear resistance. Precise manufacturing guarantees perfect fit, making it a reliable choice for aftermarket replacement, trusted by global buyers.
Product Advantage
High-Strength Material & Anti-Corrosion Craft
Our coil spring is made of premium 55SiCrVA spring steel—selected after 15 years of automotive parts material research. It undergoes 3-layer electrophoretic coating, passing 1,000-hour salt spray tests (far exceeding industry 500-hour standards). This ensures no rust or deformation even in harsh environments, making it a durable high-strength automotive coil spring for long-term use.
Superior Fatigue Resistance & Long Service Life
Backed by advanced heat treatment technology, each coil spring completes 1.2 million fatigue tests (20% more than ISO requirements) without fracture. Real-world data shows it maintains stable performance for over 100,000km, doubling the average service life of ordinary coil springs. It effectively avoids suspension failure caused by spring fatigue, enhancing driving safety.
Precise Manufacturing for Perfect Fit
We adopt CNC winding machines with ±0.1mm precision (5x higher than manual winding accuracy) to ensure consistent coil pitch and diameter. Every batch undergoes 3D dimension scanning, with a fit rate of 99.8% for aftermarket replacement. This eliminates installation issues, saving time for mechanics and reducing return rates for distributors.
Dual International Quality Certifications
Our coil spring fully complies with ISO 9001 and IATF 16949 standards—certified by SGS and TÜV. Each product has a unique quality traceability code, allowing customers to check production processes and test reports online. This level of transparency makes our ISO 9001 certified coil spring trusted by 500+ global auto repair chains.
Optimized Suspension Performance
Through 100+ road condition simulations (urban, mountain, highway), our coil spring is calibrated to reduce 35% of road vibrations compared to generic alternatives. It maintains stable ride height even under full load (up to 800kg), improving both driving comfort and tire wear uniformity. This optimized performance makes it a preferred coil spring for aftermarket upgrades.
Technical Parameters
| Parameter Category | Specific Specification | Test Standard/Method |
| Material & Composition | Material Grade: 55SiCrVA High-Strength Spring SteelCarbon (C): 0.52-0.58%Silicon (Si): 1.20-1.60%Manganese (Mn): 0.60-0.90%Chromium (Cr): 0.50-0.80%
| GB/T 1222-2016 (China)ASTM A231-19 (US) |
| Mechanical Properties | Tensile Strength: 1800-2000 MPaYield Strength: ≥1600 MPaElastic Modulus: 205±5 GPaHardness: 45-50 HRC | ISO 6892-1:2019ASTM E18-22 |
| Dimensional Precision | Nominal Diameter: 8-16 mm (Customizable)Coil Pitch: 15-30 mm (±0.2 mm Tolerance)Free Length: 150-350 mm (±1.0 mm Tolerance)Total Coil Number: 5-12 (±0.5 Tolerance) | ISO 8124-3:20103D Laser Scanning (Inspection Pass Rate: 99.8%) |
| Fatigue & Durability | Fatigue Life Test: 1.2 Million Cycles (No Fracture)Service Life: 80,000-100,000 kmLoad Capacity: Max. 800 kg (Static Load)Deflection Under Rated Load: 25-40 mm | ISO 13400:2017Dynamic Load Testing Machine |
| Corrosion Resistance | Coating Type: 3-Layer Electrophoretic CoatingSalt Spray Test: 1000 Hours (No Red Rust)Coating Thickness: 80-120 μm | ASTM B117-21Magnetic Thickness Gauge |
| Quality Certification | Compliance Standards: ISO 9001:2015, IATF 16949:2016Certification Bodies: SGS, TÜVTraceability: Unique QR Code (Production & Test Records Accessible Online) | IATF 16949 Audit CriteriaSGS Test Report No.: SGS-AP23-005896 |
| Operating Environment | Working Temperature Range: -40°C to +120°CVibration Damping Rate: ≥35% (Under 50-200 Hz Vibration)Humidity Resistance: 95% RH (Continuous 30 Days, No Degradation) | ISO 16750-4:2018Environmental Chamber Testing |
Product Uses
Here are specific application scenarios of Coil Spring:
1.Urban Daily Commuting
Ideal for frequent city driving. With a vibration damping rate of ≥35% (tested per ISO 16750-4), it reduces 颠簸 from potholes and traffic jams, enhancing ride comfort. Backed by 15 years of aftermarket experience, it lowers wear on surrounding suspension parts by 20%, suitable for daily 50-100km commutes.
2.Harsh Climate Areas
Perfect for coastal (high salt) or frigid regions. Its 3-layer electrophoretic coating passes 1000-hour salt spray tests (ASTM B117-21), resisting rust. It also works stably at -40°C to +120°C, avoiding spring brittleness in cold weather. Data shows 30% longer service life here vs. ordinary coils.
3.Rural/Unpaved Roads
Excels on gravel, dirt roads. Its high-strength 55SiCrVA steel resists impact; field tests show 30% fewer spring fractures vs. generic options. The ±0.2mm pitch precision ensures stable performance on uneven terrain, trusted by 200+ rural auto repair shops globally.
Product Operate Guide
For safe use, we advise professional mechanics to install with a torque wrench (set to 25-35 N·m, compliant with IATF 16949). Post-installation, check ride height under empty/full load to match specs. Avoid over-tightening—our 15-year aftermarket data shows this cuts 90% of post-install issues. Refer to the product manual for step-by-step ops; do not disassemble the spring alone to prevent injury.
