About YKWiki — Global Material Cross-Reference

YKWiki is an independent, data-driven index dedicated to simplifying global industrial procurement and engineering through programmatic data aggregation. We cross-reference steel grades, material specifications, and international standards to help engineers, procurement professionals, and fabricators quickly find equivalent materials across different national and international standards (ASTM, EN, JIS, GB, IS, and more). Our data is compiled from publicly available international standards, mill test certificates, and industry-recognized cross-reference tables. While we strive for accuracy, material substitution carries inherent engineering risk—always verify critical properties through official Material Test Reports (MTRs) and consult qualified engineers for structural and safety-critical applications.