NPFC - MIL-P-85856/6
POWDER MATERIALS FOR FLAME AND PLASMA SPRAYED COATINGS COBALT BASE, TYPE I, CLASS 2, COMPOSITION C
| 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(1)
Cr Ni Fe W C Mn Si Co P S
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Particle Size/Distribution −170 Mesh (−90 µm) 100.0 min. −200 Mesh (−75 µm) 95.0 min. +325 Mesh (+45 µm) 90.0 min. Sprayed Coating Properties Bond Strength 41.0 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 65% min for N2/H2 @ 15.0 lb/hr 30% min for A/H2 @ 7.0 lb/hr
Comparable Documents
Powder which meets the requirements specified is qualified under the following specifications.
Pratt & Whitney Aircraft PWA 1318 Rolls-Royce, Ltd. MSRR 9507/3
Document History
