P2. JML Attatchment - K-Monel Heat Review.pdf

This document is a Vendor Acknowledgement of K-Monel Heat Review addressing mechanical property failures of fasteners manufactured from NiCuAl (K-Monel) material produced by Special Metals Corporation. The document details an investigation into material from eighty (80) specific heat numbers that may not meet mechanical property requirements of QA-N-286. Vendors are prohibited from providing raw stock or finished products made from the listed suspect heat numbers and are instructed to review their inventory and contact the PHNS & IMF contracting officer for adjudication.

The document includes a comprehensive table listing 48 specific K-Monel heat numbers considered suspect, and provides details about approved laboratories for strain rate tests, which include facilities in Huntington (WV), Houston (TX), West Bethesda (MD), Monroe (NC), and Duisburg (Germany). The investigation revealed issues with insufficient aluminum content and an inability to consistently obtain the required minimum yield strength, with the aluminum content being non-homogeneous due to cropping practices at the manufacturing facility.