The inspection methods for copper castings mainly include the following:
Appearance inspection
Visual Inspection: Used to inspect the surface of copper castings for defects such as porosity, cracks, inclusions, shrinkage and surface roughness.
Dye penetration inspection: Use penetrating solution coated on the surface of copper castings to detect surface defects by observing the diffusion of penetrating solution in cracks or holes.
Dimensional Inspection
Coordinate Measuring Machine (CMM): Used to check dimensional, shape and positional tolerances of castings, suitable for precision measurements of complex geometries.
Calipers and micrometers: Commonly used to check simple dimensions and thicknesses of copper castings, easy to use but with relatively low accuracy.
Gauges: Used to quickly check the conformity of a specific size or shape.

Non-destructive testing
Ultrasonic inspection: Detection of internal defects such as cracks, porosity and inclusions in copper castings through ultrasonic probes, suitable for thick-walled or large castings.
X-ray Inspection: Used to inspect the internal structure of castings, can detect internal defects such as air holes, shrinkage holes and cracks, suitable for high-demand casting quality inspection.
Magnetic Particle Inspection: Mainly used for detecting surface and near-surface defects, such as cracks and air holes, in ferromagnetic copper castings.

Mechanical Properties Testing
Hardness Test: Measure the hardness of copper castings, such as Brinell (HB), Rockwell (HR), etc., to assess the wear resistance and strength of the material.
Tensile test: Measure the tensile strength, yield strength and elongation of the castings by tensile testing machine to assess the mechanical properties of copper castings.
Impact testing: Testing the impact toughness of castings, especially for evaluating the toughness at low temperatures.
Chemical composition analysis
Spectroscopic analysis: Used to test the chemical composition of copper casting materials to ensure that the alloy composition of copper castings meets the design requirements.
Energy Dispersive X-ray Spectrometry (EDS): Used to analyse the elemental composition of materials, especially for compositional analysis of small areas.

Other special tests
Gas Tightness Test: Checks the gas tightness of copper castings to ensure that no liquids or gases can escape during operation.
Corrosion Resistance Testing: Evaluates the corrosion resistance of copper castings in specific environments, often used for copper castings that need to be exposed to corrosive environments for long periods of time.
These tests can be used in combination to ensure the quality and reliability of copper castings for different applications.