For Thermal Interface Materials what standard is used for the test information for thermal conductivity, hardness and breakdown voltage?

ASTM International founded in 1898, formerly known as American Society for Testing and Materials, is an international standards organization that develops and publishes voluntary consensus technical standards for a wide range of materials, products, systems, and services. Some 13,000 standards are searchable on their web site and the specific standards detailed on our data sheets are ASTM-D5470 for thermal conductivity, ASTM-D2240 for hardness and ASTM-D149 for breakdown voltage.