This document specifies the classification, ordering content, size, shape, weight, technical requirements, and test methods of ultra-high purity stainless steel rods (general term for round steel, square steel, flat steel, and hexagonal steel, hereinafter referred to as steel rods) for semiconductor manufacturing equipment. , inspection rules, packaging, logos and quality certificates. This document applies to ultra-high purity stainless steel hot-rolled steel bars, cold-drawn blanks and cold-drawn steel bars with dimensions (diameter, side length, thickness or distance between opposite sides, hereinafter referred to as size) not greater than 150mm for semiconductor manufacturing equipment valves and steel pipes.