This document specifies the ordering content, grade representation method, size, shape, weight, technical requirements, test methods, inspection rules, packaging, marking and quality certificates of high-performance sulfur series free-cutting steel for automotive parts. This document is suitable for the manufacture of hot-rolled round steel, cold-drawn round steel, silver-bright steel and hot-rolled wire rods with a diameter of 5.0mm~40.0mm that require high cutting performance such as automobile steering gear turbines and overrunning pulleys. , cold drawn wire rod.
T/SSEA 0077-2020 history
2020T/SSEA 0077-2020 High-performance chalcogenide free-cutting steel for auto parts