ISO 604 Compressive Properties of Plastics ISO 604 is an international standardized test method used to determine the compressive properties of rigid and semi-rigid thermoplastic or thermoset materials. Using Compression Platens to apply a force, the properties obtained are compressive strength, strain at compressive strength, compressive yield stress, and if required, modulus. ISO 604 is used alongside its tensile test standard equivalent, ISO 527, which together provide the fundamental material properties of polymers that are found in every industry and even every household around the globe. Materials Testing System
Depending on the maximum expected forces, ISO 604 can be performed on either a single column or dual column universal testing machine ,Compression platens with integral spherical seats are ideal for ensuring platen to platen parallelism, which is a requirement within ISO 604.