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Jiangsu Sunzo Spring Elasticity Technology Co., Ltd
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{"title":"Compression Spring with Superior Elastic Recovery and High Fatigue Resistance","imgUrl":"https:\/\/img.chinax.com\/nimg\/2a\/c3\/e3a21f5eb0b04778903f7447d648-200x200-1\/compression_spring_with_superior_elastic_recovery_and_high_fatigue_resistance_for_maintenance_cost_reduction.jpg","attrs":{"Elastic recovery rate":"98%","Fatigue resistance":"35% better","Load capacity retention":"95% after 5 years","Load-deflection linearity":"\u00b12% tolerance"}}
{"title":"Precision Manufacturing Steel Helical Compression Spring for Industrial","imgUrl":"https:\/\/img.chinax.com\/nimg\/fe\/0b\/d9a9aa8843c9922ec071cd492b48-200x200-1\/precision_manufacturing_steel_helical_compression_spring_for_industrial_applications.jpg","attrs":{"Minimum Order Quantity":"Negotiable","Material":"Steel","Load Type":"Compression","Production Process":"Hot Roll"}}
{"title":"Medical-Grade Helical Compression Spring with ISO 13485-Certified Materials, \u00b10","imgUrl":"https:\/\/img.chinax.com\/nimg\/8a\/98\/f63a26a77a86419b912b5a1fe14d-200x200-1\/medical_grade_helical_compression_spring_with_iso_13485_certified_materials_2c_c2_b10_005mm_tolerances_2c_and_biocompatibility_tes.jpg","attrs":{"Material":"ASTM F138 titanium alloy, 316LVM stainless steel","Surface Finish":"0.002\u03bcm","Wire Diameter":"0.15mm","Dimensional Tolerance":"\u00b10.005mm"}}
{"title":"High-Carbon Steel Compression Spring with 2200 MPa Tensile Strength and 50 kN","imgUrl":"https:\/\/img.chinax.com\/nimg\/f5\/cd\/611bb7edc39e87138b2daaac7021-200x200-1\/high_carbon_steel_compression_spring_with_2200_mpa_tensile_strength_and_50_kn_load_capacity_for_heavy_duty_applications.jpg","attrs":{"Material grade":"ASTM A228, EN 10270-1","Tensile strength":"2200 MPa","Hardness rating":"45-50 HRC","Static load capacity":"50 kN"}}
{"title":"Helical Motorcycle Heavy Compression Springs Industrial Helical Compression","imgUrl":"https:\/\/img.chinax.com\/nimg\/b2\/17\/011997c32536f2ed8677266a993f-200x200-1\/helical_motorcycle_heavy_compression_springs_industrial_helical_compression_spring.jpg","attrs":{"Minimum Order Quantity":"Negotiable","Place of Origin":"Sihong, China","Brand Name":"Sunzo","Certification":"CE\/IATF16949\/45001\/14001\/9001"}}
{"title":"Extreme Conditions Alloy Steel Helical Spring Fatigue Resistant Precision CNC","imgUrl":"https:\/\/img.chinax.com\/nimg\/04\/61\/cc713bf30a60f2cb2577497ec87c-200x200-1\/extreme_conditions_alloy_steel_helical_spring_fatigue_resistant_precision_cnc_coiled.jpg","attrs":{"Place of Origin":"Sihong, China","Brand Name":"Sunzo","Certification":"CE\/IATF16949\/45001\/14001\/9001","Minimum Order Quantity":"Negotiable"}}
Quality serves as the cornerstone of industrial trust, and our Helical Compression Springs are certified under ISO 9001:2015—the globally recognized benchmark for quality management systems. This certification validates our unwavering commitment to delivering products that consistently meet international standards across 12 critical quality management clauses, from customer focus to continuous improvement.
Quality Assurance Framework
Our quality assurance framework integrates advanced technologies and rigorous protocols to ensure every spring meets or exceeds industry requirements:
Raw Material Qualification: Supplier audits and material traceability with spectroscopic analysis, tensile strength testing (minimum 1800 MPa), and corrosion resistance verification
In-Process Quality Control: Real-time SPC with Cpk values maintained above 1.67 for critical dimensions and automated vision systems inspecting coil geometry at 200+ data points per second
Finished Product Testing: Comprehensive protocols including load-deflection testing (±1.5% tolerance), fatigue life cycling (10⁷ cycles at 70% of yield strength), and environmental conditioning (-40°C to 200°C thermal shock)
Laboratory Validation
Our ISO 17025 accredited lab further validates performance through:
Metallurgical analysis
Hardness testing (42-45 HRC)
Fracture toughness evaluations
Industry Applications
This rigorous quality ecosystem enables our springs to excel across multiple industries:
Industry
Compliance Standards
Automotive Safety Systems
ISO 19403 durability standards
Medical Devices
FDA Class VI biocompatibility
Aerospace Components
AS9100D compliance
Material Specifications
Available in premium materials including:
High-carbon steel (ASTM A228)
Stainless steel (316L)
Alloy steel (Cr-V)
With a dedicated quality engineering team and digital quality management system (QMS), we provide full traceability—from raw material lot codes to production parameters—ensuring transparency for our global clientele.
Continuous Improvement
Beyond compliance, our ISO 9001 framework drives continuous improvement through customer feedback loops, corrective action protocols, and Design for Six Sigma (DFSS) methodologies, reducing non-conformities to 0.002% ppm.
Whether you require RoHS-compliant electronics springs or high-temperature alloy variants for industrial ovens, our certified quality process guarantees consistent performance, reliability, and peace of mind.
