UNI EN ISO 4957:2018现行
Tool steels
出版：Ente Nazionale Italiano di Unificazione (UNI)
专家解读视频
This document specifies requirements for the following grades of wrought tool steels:a) non-alloy cold-work tool steels;b) alloy cold-work tool steels;c) alloy hot-work tool steels;
ISO 4957:2018 - Identical
EN ISO 4957 : 1999 - Identical
EN ISO 4957 : 2018 - Identical
ISO 4957:2018 - Identical
EN ISO 4957 : 1999 - Identical
EN ISO 4957 : 2018 - Identical
