ATTACHMENT_K-MONEL.pdf

This document is a Vendor Acknowledgement of K-Monel Heat Review, detailing mechanical property failures of fasteners manufactured from NiCuAl (K-Monel) material produced by Special Metals Corporation in Huntington, West Virginia. The document identifies eighty (80) heat numbers of suspect K-Monel material that may not meet mechanical property requirements of QQ-N-286. Specifically, the investigation revealed issues with aluminum content and yield strength, with material from the toe of the ingot showing non-homogeneous aluminum content.

The second page lists approved laboratories for strain rate tests of K-Monel raw stock, including Huntington Alloys, Metallurgical Consultants Inc., Naval Surface Warfare Center, Teledyne Alvac, and Mannesmann Rohrenwerke in Germany. Vendors are prohibited from providing raw stock or finished products made from the listed suspect heat numbers and are instructed to review their inventory. The document serves as a technical notification to vendors about potential material quality concerns in K-Monel alloy production, with implications for future procurement and manufacturing processes.