Find the most up-to-date version of SAE AMS-C at Engineering MIL-CC. 3 MY les5. MILITARY SPECIFICATION. This specification ie approved for we by all. Departfmnta and Agencie8 of the Oapartmmt of. Defense. 1. SAE AMS-C Electroless Nickel Coatings. SAE AMS-C Revision D, June Complete Document. Electroless Nickel Coatings. Includes all.
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AMS-C-26074 and MIL-C-26074 – An explanation of the revision path
Aluminum alloys non-heat treatable, and beryllium alloys processed to improve adhesion of the nickel deposit. The separate specimens shall be mas approximately 1-inch wide, 4-inches long, and 0. The coating adhesion after completion of all processing and thermal treatments shall be such that when examined at a magnification of 4X, the coating shall not show separation from the basis metal when tested in accordance with ASTM B as specified in 4.
Unfortunately, the MIL-C was not cancelled at that point in time. The basis material shall be free from defects that will be detrimental to the utility, appearance, or serviceability of the finished product or part and coating.
Unless otherwise specified, minimum thickness of the nickel coating shall be 0.
The part shall be considered nonconforming if one or more measurements fail to meet the specified minimum thickness. A hardness test shall be run once a month, on four randomly selected parts representing the months production, or on four separately coated specimens as specified in 4.
Heat treatment increases coating magnetism. Still SAE felt that the specification duplicated pre-existing standards and wanted to withdraw the document in favor of those older and well-used documents.
2604 random sample of 4 parts shall be selected from each inspection lot which has more than 15 parts see 4. Coated-test specimens shall be exposed to a neutral salt-spray test in accordance with ASTM B for hours. Your email address will not be published. 26047 part, or specimen shall be tested as specified in 4. Aluminum alloys, heat-treatable, processed to improve adhesion of the nickel deposit.
With aluminum electronic devices, not only is product contamination prevented, but the coated parts facilitate soldering when used in conjunction with a mildly activated RMA or activated RA rosin flux. When tested in accordance with 4. Nickel Electroless autocatalytic chemical reduction 6. When the coated parts are of such form as to be not readily adaptable to a test specified herein, or at the discretion of the inspector for destructive tests for the sampling of small lot sizes, the test may be made by the use of separate specimens coated concurrently with the parts represented.
Class and grade, and heat treatment or condition see 1. The Aerospace Materials Division, however, does not recommend these specifications for future use in new designs.
amss As you can see by my posting, the MIL-C has had a long strange history! Composites can be plated directly by using special pretreatments to prevent the basis material from contaminating the bath or to obtain adequate coating adhesion. The nickel coating shall be smooth, adherent, amd free from visible blisters, pits, nodules, porosity, cracks and other defects. The hardness can be achieved by heating the part see 4. A lot shall consist of coated parts of the same type and class, 62074 basis material, and of approximately the same size and shape, coated under the same conditions and by means of the same coating process, and submitted for acceptance at one time.
Stress relief heat treatment: We are going to make the assumption that you are making replacement parts and are not involved in any new design with the use of the drawing referencing the MIL-C For example, a cold-rolled steel surface shall not be used to represent a hot-rolled steel surface; owing to the impracticability of forging or casting separate test specimens, hot-rolled steel specimens may be used to represent forged and cast steel parts.
d Number of this specification. Coated parts of stainless steel similarly facilitate brazing. All steel parts having an ultimate tensile strength ofpsi, or above, shall not be coated without approval of the procuring activity.
AMS-CB is therefore reinstated and is designated as a noncurrent document. The articles, parts or test specimens shall be held under load for at least hours and then examined for fracture. Should you need copies of any of the standards mentioned, or have any further questions, please get in touch. Required hardness can be achieved by heating using the following schedule: Grade A coatings on aluminum alloys and grade C coatings on iron alloys after plating and all required thermal treatments shall show no visual evidence of corrosion of the basis metal when tested in accordance with 4.
MIL-C D COATINGS ELECTROLESS NICKEL REQUIREMENTS
The nickel coatings shall be of the following grades: Equivalent basis material includes chemical composition and surface finish prior to coating application.
Coated parts–that is, those parts used in air compressors, missile-fuel injector plates, pumps, reciprocating surfaces, and so forth are protected from oxidation, corrosion and wear.
The Government reserves the right to perform any of the inspections set forth in this qms where such inspections are deemed necessary to ensure supplies and services conform to prescribed requirements. Leave a Reply Cancel reply Your email address will not be cc. Samples shall be selected from each lot see 4.
Parts–spring pins, lock rings, and so forth–that are installed in holes or rods shall be similarly assembled using the applicable parts specifications or drawing tolerances which impose the maximum sustained tensile load on the plated part. Excellent uniform deposits are produced on irregular parts. D section contains information of a general or explanatory nature that may be helpful, but is not mandatory. The amount of testing may be reduced provided the results in the consecutive months indicate a uniform product meeting the test requirements is being produced, and providing the manufacturer agrees to maintain the same manufacturing procedures or develops alternative acceptable manufacturing procedures.