NPFC - MIL-P-85856/7
POWDER MATERIALS FOR FLAME AND PLASMA SPRAYED COATINGS NICKEL CHROMIUM ALLOY, TYPE I, CLASS 1, COMPOSITION B
| Organization: | NPFC |
| Publication Date: | 7 December 1988 |
| Status: | active |
| Page Count: | 2 |
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
Cr Ni Fe C Mn Si O2
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Particle Size/Distribution
−230 Mesh (−63 µm) 95.0 min. −270 Mesh (−53 µm) 80.0 min.
Sprayed Coating Properties
Bond Strength 31.0 MPa (4500 psi) min. Hardness Rockwell 15T, 90 min. Microstructure See paragraph 4.5.4.1.2 Porosity - 3% max. Unmelted Particles - 10% max.
Deposit Efficiency and Deposition Rate
70% min for N2/H2 @ 16.0 lb/hr 50% min for A/H2 @ 16.0 lb/hr
Comparable Documents
Powder which meets the requirements specified is qualified under the following specifications.
General Electric Company B50TF40, Class B Pratt & Whitney Aircraft PWA 1317 Rolls-Royce, Ltd. MSRR 9507/27
Document History
