ISO 604 Compressive Plastics Testing Equipment

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ISO 604 determines the compressive properties of unreinforced and reinforced rigid plastics, including high-modulus composites, when loaded in compression at slow strain or load rates such as modulus of elasticity, compressive strength, yield stress, and deformation beyond yield point and provide a standard method of comparison of materials for research and development, quality control, acceptance or rejection under specifications and other specific purposes.

For ISO 604, typical test blocks are are 50 x 10 x 4mm for modulus and 10 x 10 x 4mm for strength. The specimen is placed between compressive plates parallel to the specimen surface. The specimen is then compressed at a constant rate. The maximum load is recorded along with stress-strain data. ISO 604 An extensometer attached to the fixture is used to determine the modulus of elasticity. When performing compression testing, it has been found that specimen alignment plays an important role in achieving even load distribution, which contributes to the consistency of the results. The ISO 604 standard is technically equivalent to the ASTM D695 Standard.