PDF
…should assume
that the material property data published in this report is not applicable when the
material is not procured to NMS 688/2. NMS 688/2 is a free, publicly available, nonproprietary aerospace industry material specification.
The data in this report is intended for general distribution to the public, either freely or at
a price that does…
https://www.wichita.edu/industry_and_defense/NIAR/Research/tencate-tc250/12k-HTS40-2.pdf