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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Class 1 Class 2 Class 3 Class 4 1. With aluminum electronic devices, not qms is product contamination prevented, but the coated parts facilitate soldering when used in conjunction with a mildly activated RMA or activated RA rosin flux.
amms 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. Coated-test specimens shall be exposed to a neutral salt-spray test in accordance with ASTM B for hours.
Parts that require special fixtures, extreme loads to comply with the above requirements, or where the maximum design yield load is not known, may be represented by separate test specimens.
If the number of parts in an inspection lot is 15 or less, the number of parts in the sample shall be 2 or 3 as determined by the procuring activity.
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. Title, number and date of the specification. Aluminum alloys, heat-treatable, processed to improve adhesion of the nickel deposit.
The separate test specimens used for salt-spray testing shall be 4 inches by 6 inches. Heat treated to obtain required hardness: This specification covers the requirements for electroless autocatalytic chemical reduction deposition of nickel-phosphorous alloy coatings on metal and composite surfaces.
Coated parts of stainless steel similarly facilitate brazing. 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.
Issue of DODISS to be cited in the solicitation, and if required, the specific issue of individual documents reference see 2. As you can see by my posting, the MIL-C has had a long strange history! 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.
MIL-C D COATINGS ELECTROLESS NICKEL REQUIREMENTS
TSB rules provide for a the publication of portions of unrevised government specifications and standards without consensus voting at the SAE Committee level, and b the use of the existing government specification or standard format.
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.
The nickel coatings shall be classified in accordance with the thermal treatment applied subsequent to plating. Unless otherwise specified, the shot peening shall be accomplished on all surfaces for which the coating is required and all immediately adjacent surfaces when they contain notches, fillets or other abrupt changes of section size where stresses will be concentrated.
Each of the sample parts selected in accordance with 4. Unfortunately, the MIL-C was not cancelled at that point in time. Manufacturers are given latitude in the selection of specific plating bath formulations used for the chemical deposition of an amorphous nickel-phosphorous metallic compound provided the coating obtained meets the requirements of this specification.
The separate specimens shall be strips approximately 1-inch wide, 4-inches long, and 0.
SAE AMS-CB 化学镀镍(英文)_百度文库
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. Excellent uniform deposits are produced on irregular parts.
Acquisition documents should specify the following: No part of this publication may be reproduced, stored in a retrieval system or transmitted, in any form or by any means, electronic, mechanical, photocopying, recording, or otherwise, without the prior written permission of SAE. When specified, the coated parts shall f marked with a fluid not affected by water, or rub off, or smear during shipment or storage; and shall carry a tag giving the following information: SAE invites your written comments and suggestions.
This section contains information of a general or explanatory nature that may be helpful, but is not mandatory.
It is recommended, therefore, that this specifications not be specified for new designs. These specimens shall be introduced into a lot at regular intervals prior to the cleaning operations preliminary to coating and shall not be separated therefrom until after completion amss the processing.
Heat treatment increases coating magnetism. At least once per calendar quarter, a coated part, or a separately coated specimen prepared in accordance with 4. Class and grade of coating. The Aerospace Materials Division, however, does not recommend these specifications for future use in new designs. However, it is not advised for new design. Periodic microscopic destructive thickness and adhesion tests shall be performed as a referee method to verify comparable nondestructive tests for the purpose of process control assurance.
Class 2 hardness coatings: 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 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. Unless otherwise specified, the coating shall be applied after all basis metal heat treatments and 266074 operations such as machining, brazing, welding, forming, and perforating of the part have been completed.
Each part, or specimen ama be tested as specified in 4. Required hardness can be achieved by heating using 26047 following schedule: The selected samples shall be subjected to 260774 sustained tensile load equal to percent of the maximum design yield load for which the part was designed.