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What is an ASTM Standard? astm ASTM International is one of the largest voluntary standards development organizations in the world-a trusted source for technical standards for materials, astm ASTM International, formerly known as American Society for Testing and Materials, is a standards organization that develops and publishes voluntary

astm ASTM Designations After the letter, there is a reference number given to the standard From there, a grade can be added For example, F3125 is