Additional Testing Technology

Each of our foundries has a fully functional metallurgical lab that performs chemical analysis, mechanical testing and microstructure analysis.  Degreed metallurgical engineers support customer requirements and assist in quality control functions. Testing procedures are designed to eliminate trial and error and subjectivity of more traditional methods.


Resonant frequency tests the uniformity in a structure and the density of a casting to ensure the casting will not produce unwanted noise. In the case of automotive brake discs, this ensures rotors will operate without excessive vibration and/or noise.
Wedge penetration testing measures the tensile strength of the component using a section of gray iron from an actual finished casting (not a cast bar).
Advanced thermal arrest system establishes the properties of the iron. By examining the solidification rate of the iron, metallurgists can determine the solidity of the casting. During the cooling process as iron goes from a liquid to a solid, it goes through phase transformations which release or absorb heat. By measuring these “events” we are able to predict if the castings will be solid and if the structure can be machined.
Tensile testing measures the tensile strength, yield strength and elongation for iron casting materials. Dimensions are very important for the accurate test result, so at Waupaca Foundry, we use a computer lathe, or CNC, to machine tensile bars to a high degree of accuracy so the sample is representative of how  the casting will be machined. This ensures the castings meet specifications.