DO ASTM standards supercede ANSI standards?

ASTM standards and ANSI standards serve different purposes, and one does not inherently supersede the other. ASTM International develops technical standards for materials, products, systems, and services, while ANSI (American National Standards Institute) oversees the development of voluntary consensus standards for various sectors. In some cases, ASTM standards may be adopted by ANSI as American National Standards, but they operate independently. The applicability of one over the other depends on the specific context and requirements of a project or industry.