scope:

This specification is approved for use by all Departments and Agencies of the Department of Defense.

The complete requirements for acquiring the powder described herein shall consist of this document and the latest issue of MIL-P-85856.

Chemical Composition

Mo O₂ Others (1) ---------------- Each Total --------------------------------------- 99.5 min. 0.15 max. - 0.5 max.

Particle Size/Distribution

+170 Mesh (+90 µm) 1.0 max. +200 Mesh (+75 µm) 15.0 max. +325 Mesh (+45 µm) 80.0 min.

Sprayed Coating Properties

Bond Strength 41.4 MPa (6000 psi) min. Hardness Rockwell 15N, 75 min. Microstructure See paragraph 4.5.4.1.2 Porosity - 15% max. Unmelted Particles - 15% max.

Deposit Efficiency and Deposition Rate

70% min for N₂/H₂ @ 9.5 lb/hr 50% min for A/H₂ @ 3.5 lb/hr

Comparable Documents

Powder which meets the requirements specified is qualified under the following specifications.

General Electric Company B50TF41, Class A Pratt & Whitney Aircraft PWA 1313 Rolls-Royce, Ltd. MSRR 9507/19