K-MONEL.pdf

This is a vendor acknowledgement document regarding K-Monel heat review that identifies 80 suspect heat numbers from Special Metals Corporation (formerly INCO Alloys) of Huntington, West Virginia. The document outlines mechanical property failures discovered in NiCuAl (K-Monel) fasteners, where aluminum content in the toe portion was found to be as low as 2.0% with yield strength around 40,000 PSI, falling below the QQ-N-286 specification requirement of 2.3% minimum aluminum and 90,000 PSI minimum yield strength.

The document lists 80 specific K-Monel heat numbers that are considered suspect and provides requirements for K-Monel raw stock procurement under QQ-N-286 Revision G. It identifies seven approved laboratories authorized to conduct slow strain rate tests: Huntington Alloys, Metallurgical Consultants Inc., Naval Surface Warfare Center Carderock Division, Teledyne Allvac, Mannesmann Rohrenwerke in Germany, Westmoreland Mechanical Testing and Research Inc., and ThyssenKrupp VDM USA Inc. Vendors are prohibited from providing raw stock or finished products made from the suspect K-monel heats without contacting the PHNS & IMF contracting officer for adjudication.