Reliability and Automotive Parts Inspection

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

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