Certifications & Quality Compliance

Carsai Precision Parts is committed to delivering high-quality CNC machined parts, stamped components, sheet metal assemblies, and power busbar products that meet international standards.

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1. ISO 9001 Quality Management System

We are certified to ISO 9001, ensuring:

  • Standardized production processes
  • Traceable quality documentation
  • Consistent product quality
  • Continuous improvement
  • Reliable delivery and customer satisfaction

ISO 9001 is the core of our quality management system and applies to every stage—from incoming materials to final inspection.

ISO 9001:2015 Quality Management System Certificate for Kunshan Carsai Auto Parts Industry Co., Ltd.

2. SGS Material Inspection Reports

SGS audited supplier report for Kunshan Carsai Auto Parts Industry Co., Ltd., covering CNC machining, stamping, and metal parts manufacturing.

Materials used in our CNC machining, stamping, and busbar manufacturing are tested by SGS, the world’s leading inspection and certification company.

SGS Reports Include:

  • Chemical composition verification
  • Material grade confirmation
  • Mechanical property testing
  • RoHS / environmental compliance checks

This ensures that every batch of metal meets international standards (aluminum, copper, stainless steel, brass, carbon steel, etc.).

3. UL Compliance

Certain components and materials used in our projects follow UL safety standards, especially for products used in:

  • Electrical equipment
  • Power distribution systems
  • Telecom base stations
  • High-current busbars

UL compliance ensures safety, reliability, and stable performance in demanding electrical environments.

UL compliance certification sample for electronic components, showing model, standards and UL listed mark.

4. RoHS Environmental Compliance

RoHS environmental compliance certificate for CNC machined parts, showing restricted substances list and compliant results under Directive 2011/65/EU and (EU) 2015/863.

All parts can be manufactured according to RoHS requirements, restricting the use of hazardous substances.

RoHS ensures compliance with global environmental regulations, especially for:

  • Electronics
  • Telecom components
  • Consumer devices
  • Automotive parts

Full RoHS test reports can be provided upon request.

5. Material Certificate / Mill Certificate

For every production batch, we can provide official Mill Certificates including:

  • Material grade
  • Chemical composition
  • Mechanical properties
  • Heat number traceability

These certificates ensure that customers receive materials that match engineering and regulatory requirements.

C1100 copper material certificate with tensile strength, hardness, conductivity and chemical composition test results.

6. Plating Thickness Test Report

Tin plating thickness test report for T2 copper busbar measured by Fischerscope X-ray, showing Sn coating thickness values and average 7.88 μm.

For surface-finished products, we perform coating and plating thickness tests to ensure uniformity and durability.

Applicable to:

  • Nickel plating
  • Tin plating
  • Zinc plating
  • Anodizing
  • Powder coating

We use professional test equipment to ensure the coating meets the required thickness and adhesion standards.

7. Salt Spray Test (Corrosion Resistance)

We conduct salt spray testing for components requiring anti-corrosion performance.
This test evaluates:

  • Surface protection effectiveness
  • Plating durability
  • Environmental resistance

Common for:

  • Outdoor telecom parts
  • Power busbars
  • Industrial enclosures

Salt spray results help ensure long-term reliability in harsh environments.

96-hour NSS salt spray test report for CNC machined steel parts with zinc-nickel plating, showing corrosion resistance results and PASS evaluation.

8. Tensile Strength Testing

Tensile strength test certificate showing material properties, testing results, equipment details, and inspection approval stamp.

To verify mechanical strength, we conduct tensile tests on metal materials and finished parts when required.

This ensures the product meets performance standards for:

  • Structural brackets
  • Sheet metal components
  • Load-bearing machined parts

Reports include stress–strain curves and material property analysis.

9. Hardness Testing

Hardness testing is used to confirm surface strength and wear resistance of:

  • Aluminum
  • Stainless steel
  • Brass / copper
  • Carbon steel

We can perform:

  • Rockwell hardness testing
  • Brinell hardness testing
  • Vickers hardness testing

Hardness verification ensures proper material selection and performance under mechanical load.

Rockwell HRC hardness test certificate showing hardness measurements, testing method, tester information, and approval stamp.

Additional Testing Available

Depending on customer requirements, we can also provide:

  • Dimensional Inspection Reports (CMM, height gauge)
  • Surface Roughness Reports (Ra)
  • Conductivity Testing for Copper Busbars
  • Assembly Fit Testing
  • Thermal & Current Load Simulation (for busbars)

Full Compliance for Global Markets

ur products comply with:

  • ISO international standards
  • EU RoHS environmental regulations
  • UL electrical safety standards
  • SGS third-party material verification
  • Customer-specific QC documentation

We support full compliance requirements for USA / Europe / Japan / Canada markets.
All certification-related inspections and documentation are managed under our quality control procedures.