AMS2750 did not, historically, mark the revision when released using change bars, as other AMS specifications do. When AMS2750F was revised to revision G, change bars were included. This has made it fairly straightforward for suppliers to understand what has been modified and account for those changes internally.
By now, most heat treaters should have had some time to read the new revision of AMS2750. The changes are extensive and, since it is considered a complete rewrite, there are no change bars to indicate specific changes.
AMS2750F and Nadcap requirements (both checklists and the pyrometry reference guide) amount to 70% of all Nadcap Heat Treat Audit findings. This trend has been consistent for over a decade now. This can be attributed to a lack of comprehension of the specification, internal execution and inadequate internal auditing systems at the supplier level as well as the prime level. Conrad Kacsik is committed to improving the comprehension of AMS2750F within the industry. We believe that this is the first step in creating a successful Pyrometry Compliance System for our customers.
There are two main changes within AMS2750F regarding instrumentation: 1) readability and 2) digital furnace instruments.
