Under publication
ISO 643
Steels — Micrographic determination of the apparent grain size
Reference number
ISO 643
Edition 5
2024-09
Under publication
ISO 643
82221
Under publication (Edition 5, 2024)
Final production steps (up to seven weeks).
Will replace ISO 643:2019

General information

  •  : Under development
     : 2024-09
    : International Standard under publication [60.00]
  •  : 5
  • ISO/TC 17/SC 7
    77.040.99 
  • RSS updates

Got a question?

Check out our Help and Support

Check out our FAQs

Customer care
+41 22 749 08 88

Opening hours:
Monday to Friday - 09:00-12:00, 14:00-17:00 (UTC+1)