Automotive Material Testing
As the basis of vehicle production, the quality of automotive materials is a prerequisite for the success of vehicle production. With the increasingly sophisticated functions of various new models and the constant pursuit of people's feeling of riding, automobile manufacturers are required to monitor the quality and safety of materials at the source.
HCT can monitor all aspects, including mechanical and mechanical properties and various reliability analyses, for metals, polymers, leather, textiles, etc.
Metal Material Testing
Ferrous metals and alloys
Various types of steel such as free cutting steel, weathering steel, nitrided steel, age-hardened steel, low-alloy high-strength steel and hot work steel; various types of cast iron such as gray cast iron, ductile iron and alloy cast iron; various other alloy materials such as chrome-based alloys, manganese-based alloys and high-temperature alloys.
Non-ferrous metals and their alloys
Pure copper, brass, bronze, deformed aluminum and aluminum alloys, zinc-based alloys, titanium-based alloys, magnesium-based alloys and precious metals, etc.
Test Items:
Failure Analysis | Mechanical properties testing | Microscopic Analysis |
Chemical Verification | Normal temperature/high and low temperature tensile test | Scanning Electron Microscopy (SEM) |
Paint contamination | Compression test | X-ray energy dispersive spectrometer (EDS) |
Corrosion analysis | Shear test | X-ray wavelength dispersive spectrometer (WDS) |
Fracture analysis | Torsion test | Laser Confocal Scanning Microscope (LSCM) |
Macroscopic analysis | Bending test | Atomic Force Microscopy (AFM) |
Microscopic evaluation | Flare test | X-ray photoelectron microscopy (XPS) |
Photo documentation | Impact test (at different temperatures) | Transmission Electron Microscopy (TEM) |
Physical Testing | Cupping test | Phase Shift Interferometer (PSI) |
Scanning electron microscopy | Rockwell / Brinell / Vickers / Richter hardness | Scanning Probe Microscopy (SPM) |
Surface contamination | Crush test | Auger Electron Spectroscopy (AES) |
Welding evaluation | Fastener mechanical properties | Low Temperature Electromagnetic Microscopy (LTMM) |
- | Welded plate (tube) mechanical properties | - |
Metallographic Analysis | Plating Analysis | Corrosion test |
Non-metallic inclusions | Plating thickness | Stainless steel 10% oxalic acid leaching test |
Low-power organization | Coulometric method | Stainless steel sulfuric acid - iron sulfate corrosion test |
Grain size | Metallographic method | Stainless steel 65% nitric acid corrosion test |
Fracture inspection | Eddy current method | Stainless steel nitric acid - hydrofluoric acid corrosion test |
Plating thickness | X-ray fluorescence method | Stainless steel sulfuric acid - copper sulfate corrosion test |
Hardening layer depth | Plating composition analysis | Stainless steel 5% sulfuric acid corrosion test |
Decarburization layer | Surface stain analysis | Neutral salt spray test |
Metallographic section analysis | Surface hardness and adhesion analysis | Acid salt spray test |
- | - | Copper ion accelerated salt spray |
- | - | Sulfur dioxide corrosion test |
- | - | Hydrogen sulfide corrosion test |
- | - | Mixed gas corrosion test |
Breakdown Analysis | Welding inspection | Dimensional measurements |
Macroscopic Analysis | Appearance inspection of welding | Geometry |
Overall overview of the fracture | Mechanical properties of welding | Symmetry |
Preliminary identification of fracture cause | Hardness analysis of welding | Perpendicularity |
Microscopic analysis | Metallographic analysis of welding | Flatness |
Fracture path | Chemical analysis of welding | Circular runout |
Fracture nature | Corrosion testing of welding | Coaxiality |
Environmental medium influence | Weldability analysis of welding | Parallelism |
Temperature influence | Welding deformation and stress testing | Roundness |
- | Non-destructive testing of welding | Roughness |
- | Failure analysis of welding | - |
Nondestructive Testing | Chemical Testing and Analysis Services | Ore Testing |
Ultrasonic Inspection | Chemical Composition Analysis | Semi-quantitative analysis of raw ore spectra |
X-Ray Inspection | Chemical Trace Testing | Chemical multi-element analysis |
Magnetic particle inspection | Contamination Detection and Analysis | X-ray diffraction analysis |
Penetrant inspection | Chemical impurity identification | Physical phase analysis |
- | Routine inspections and non-routine testing | - |
Polymer Material Testing
Rubber & Plastic
Including PE, PP, PVC, ABS, PC, PA, POM, PBT, PET, TPE, TPO, TPR, TPU and other materials manufactured automotive interior/exterior trim parts and structural parts; and natural rubber, SBR rubber, SBS rubber, vulcanized rubber, including automotive shock absorbers, sheaths, tires, drive belts, sealing rubber strips, wiper scrapers, etc.
Major Projects:
Mechanical Properties | Thermal Properties | Insulation electrical properties |
Density and specific gravity | Melting index/melting point | Surface resistivity |
Tensile/flexural/compression properties | Moisture/ash | Volume resistivity |
Impact | Thermal weight loss | Breakdown voltage |
Rockwell / Shore hardness | Glass transition temperature | Leakage start trace |
Pencil hardness | Heat deflection temperature | Arc resistance |
Tear Strength | Thermal conductivity | Dielectric loss |
Precision load testing | Vulcanization Analysis | Dielectric constant |
Menney Viscosity | Low temperature embrittlement | Dielectric strength |
- | Thermal expansion coefficient | - |
Artificially accelerated aging | Combustion Testing | Chemical resistance test |
Xenon light aging | Vertical combustion | Detergent resistance |
UV light aging | Horizontal combustion | Resistant to perspiration |
Carbon arc lamp aging | - | Resistant to oil |
Temperature and humidity cycle | - | - |
Temperature and Humidity Shock | - | - |
Ozone Aging | - | - |
Reflective materials
Including reflective signs, reflective stickers, reflective textiles and triangular warning signs on the body of the car.
Test Items
Size
Color
Reflectivity
Abrasion resistance
Color fastness
Compression properties
Flexural strength
Cracking
Salt spray test
Foam foam
Including seat cushions, padding materials and interior and exterior trim parts mainly used in the cabin section.
Test items
Density
Compression deformation
Hardness
Thermal conductivity
Water absorption rate
Sound absorption coefficient
Sound insulation volume
Heating fluidity
Fillability
Steel plate adhesion
Phosphating liquid adaptability
Solids content
Leather and textile testing
Including seat covers, cabin linings, car carpets, headliner nonwovens, trunk felt cloth, etc.
Mechanical and other physical properties | Chemical properties and chemical tolerance | Product Reliability |
Tensile strength | Leather pH | Sunlight yellowing resistance test |
Tear strength | Sweat resistance | Heat aging resistance test |
Thickness | Trivalent chromium content | Cold resistance |
Flame retardancy | Odor/total carbon/formaldehyde/fogging | Washing color fastness |
Flexibility | Anti-mildew properties | Color fastness to sassafras |
Grease content test | Vinyl chloride monomer | Abrasion resistance of blanket surface |
Ash/moisture | Soluble heavy metals | Flexibility resistance |
Dye Migration | - | - |
Unit density | - | - |
Coating adhesion strength | - | - |
Pinhole Tear Strength | - | - |
Needle seam tear strength | - | - |
Shrinkage moisture | - | - |
Air permeability | - | - |
Color migration | - | - |
Coating and plating testing
Coatings and plating are applied to the surfaces of interior and exterior trim, fasteners and various mechanical drive components for aesthetic and cost-saving reasons, or to increase the mechanical strength of components and enhance other functions.
Test items
Paint film elasticity
Wear resistance
Coating/Plating Thickness
Pencil hardness
Glossiness
Color difference
Coating impact resistance
Sand impact resistance of paint film
Damping hardness
Composition analysis
Glass testing
Mainly includes window glass and reflectors.
Main items
Reflectance
Light transmission rate
Crush-break test
Edge stress