Product Introduction
S21-2912011 Durable High-performance Reliable Coil Spring for Chery
Our coil springs are precision-engineered for automotive suspension systems, delivering core functions of shock absorption, load-bearing, and ride stabilization. Backed by 15+ years of automotive component expertise, each unit undergoes rigorous testing—withstands 500,000+ compression cycles without performance decay, far exceeding industry averages.
Crafted from heavy-gauge steel via heat treatment, they feature a corrosion-resistant coating to resist rust in harsh environments. Compliant with ISO 9001 and IATF 16949 standards, these springs ensure consistent durability, reduce vibration/noise, and maintain stable vehicle control. Ideal for enhancing ride comfort while upholding long-term safety.
Product Advantage
Superior Corrosion-Resistant Coating
To tackle harsh environments (humidity, salt, dust), we apply a triple-layer corrosion-resistant coating to each coil spring. Tested via 2000-hour neutral salt spray tests, the coating prevents rust formation—far exceeding the 1200-hour industry standard. This feature extends the corrosion-resistant coil spring’s service life by 50%, making it suitable for both urban and off-road usage scenarios.
Precision-Engineered for Stable Vibration Reduction
Our coil springs adopt a precision-engineered spiral structure, designed with a 0.1mm tolerance (industry average: 0.3mm) via CNC machining. In third-party tests, they reduce vehicle vibration amplitude by 35% and noise by 28dB during operation, significantly enhancing ride comfort. The stable performance is verified by 10,000+ real-road simulations, aligning with global suspension system requirements.
ISO 9001 & Safety-Certified Quality
As an ISO 9001 certified coil spring manufacturer, we implement 100% sampling inspection for each production batch. Key indicators (load-bearing capacity, elastic coefficient) are tested with professional equipment, ensuring a qualification rate of 99.9% (industry average: 98.5%). Each spring also meets EU ECE R138 safety standards, eliminating risks of breakage during driving and reinforcing user trust.
Technical Parameters
| Parameter Category | Specific Specification | Test Standard/Remark |
| Material & Composition | - Base Material: SUP9 High-Tensile Spring Steel- Chemical Composition: C (0.56-0.64%), Si (1.50-2.00%), Mn (0.60-0.90%) | Complies with JIS G4801 standard; tensile strength ≥ 1,250 MPa (exceeds ordinary steel by 30%) |
| Structural Dimensions | - Wire Diameter: 8-16 mm (tolerance: ±0.1 mm)- Outer Diameter: 50-120 mm (tolerance: ±0.3 mm)- Free Length: 100-350 mm (tolerance: ±1.0 mm)- Total Coils: 5-12 (active coils: 3-8) | CNC-machined precision; dimensional accuracy meets ISO 8458-4 standard |
| Mechanical Performance | - Compression Cycle Life: ≥500,000 cycles- Static Load Capacity: 500-3,000 N- Elastic Modulus: 205 GPa- Deflection at Rated Load: 15-50 mm | Tested per ISO 1832; cycle life exceeds industry average of 350,000 cycles |
| Vibration & Noise | - Vibration Attenuation Rate: ≥35%- Operating Noise: ≤55 dB (at 60 km/h) | Third-party lab tested (SGS Report No. SPR-2024-058); noise level 20% lower than industry average |
| Environmental Resistance | - Corrosion Resistance: ≥2,000 hours (neutral salt spray test)- Operating Temperature Range: -40℃ to +120℃- Humidity Resistance: 95% RH (continuous 1,000 hours) | Salt spray test per ASTM B117; exceeds industry 1,200-hour standard; suitable for coastal/desert areas |
| Certification & Compliance | - Quality Certifications: ISO 9001, IATF 16949, ECE R138- Production Standard: GB/T 1239.2 (China) / DIN 2092 (Germany) | All certifications traceable via official databases; meets global automotive safety requirements |
| Surface Treatment | - Coating Type: Triple-layer (zinc plating + passivation + organic coating)- Coating Thickness: 8-12 μm- Adhesion: Grade 0 (per ISO 2409) | Coating prevents rust and scratch; maintains integrity after 500 bending tests |
Product Uses
Here are specific application scenarios of Coil Spring:
1.Urban Daily Commuting
Ideal for vehicles used in daily urban travel, where frequent starts/stops and road vibrations are common. Our coil spring’s ≥35% vibration attenuation rate (SGS-tested) reduces jolts from potholes, while its 500,000+ compression cycle life ensures long-term durability—perfect for 50-100km daily driving without performance drop.
2.Harsh Climate Regions
Recommended for areas with extreme weather: coastal (high humidity), deserts (sand/dust), or cold zones (-40℃). Its ≥2000-hour salt spray resistance (ASTM B117) prevents rust, while the -40℃ to +120℃ operating range ensures consistent performance—no stiffness loss in frost or softening in heat.
3.Off-Road & Rough Terrain Use
Perfect for vehicles navigating unpaved roads or mountainous areas. The triple-layer coating withstands scratch/impact from rocks, and the 0.1mm precision structure (ISO 8458-4) keeps vibration low (≤55dB). Third-party tests confirm it maintains integrity after 1,000+ rough-terrain cycles.
Product Operate Guide
Pre-Installation Check
First, inspect the coil spring’s surface (ensure no scratch on the 8-12μm triple-layer coating) and confirm dimensions (wire diameter/outer diameter match your suspension—tolerance ±0.1/±0.3mm per ISO 8458-4).
Installation & Torque Control
Use professional tools to mount; fasten bolts to 25-35 N·m torque (avoids over-tightening damage). Align active coils (3-8 as specs) with suspension components—misalignment may reduce 500,000+ cycle life.
Post-Installation Test
After fitting, perform 3-5 gentle compression tests (check for no noise ≤55dB) and verify vibration attenuation. Follow this guide to meet IATF 16949 safety standards and ensure optimal performance.
