AMS C 26074 PDF

AMS C 26074 PDF

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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SAE AMS-CB 化学镀镍(英文)_百度文库

It is encouraged that recycled material be used when practical as long as it meets the requirements of the document see 3. Number of this specification. Measurement of electroless nickel coatings containing less than 8 percent phosphorous by a magnetic method is not recommended. Failure of one or more of the test specimens shall constitute failure of the lot.

All items shall meet the requirements of sections 3 and 5. 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. Sampling plan C – Sampling procedure for adhesion tests: However, again there was resistance to this move.

26047 uniform deposits are produced on irregular parts. Formation of cracks that do not result in loss of plating adhesion is acceptable.

AMS-C-26074 and MIL-C-26074 – An explanation of the revision path

Thanks so much for asking, Ed: Each of the sample parts selected in accordance with 4. Class 2 coatings on steel parts that have a hardness of Rockwell C40 or above are required to be tested in accordance with 4. Class and grade of 266074. In order to post comments, please make sure JavaScript and Cookies are enabled, and reload the page. Nickel Electroless autocatalytic chemical reduction 6.

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. Should you need copies of any of the standards mentioned, or have any further questions, please get in touch.


Unless otherwise specified in the contract or purchase order, the contractor is responsible for the performance of all inspection requirements examinations and tests as specified herein. As you can see by my posting, the MIL-C has had a long strange history!

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.

I hope you find this information helpful! A hydrogen embrittlement amss test shall be run once per month on a random sample of 4 parts as specified in 4. Title, number and date of the specification. The hardness can be achieved by heating the part see 4.


Currently you have JavaScript disabled. Heat treatment increases coating magnetism. The Government reserves the right to perform any of the inspections set forth in this specification where such inspections are deemed necessary to ensure supplies and services conform to prescribed requirements.

Except as otherwise specified in the contract or purchase order, the contractor may use his own or any other aks suitable for the performance v the inspection requirements specified herein, unless disapproved by the Government.

The Aerospace Materials Division, however, does not recommend these specifications for future use in new designs. 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.

Parts that require special fixtures, extreme loads to comply with the above requirements, or where the maximum design yield zms is not known, may be represented by separate test specimens. Sampling plan B – Sampling procedures for evaluating hydrogen embrittlement relief destructive test – Class 1 and 2: F section contains information of a general or explanatory nature that may be helpful, but is not mandatory. Coated parts of stainless steel similarly facilitate brazing.

At least once per calendar quarter, a coated part, or a separately coated specimen prepared in xms with 4. The articles, parts or test specimens shall be held under load for at least hours and then examined for fracture.


Under Department of Defense policies and procedures, any qualifications requirements and associated qualified products lists are mandatory to DOD contracts. Still SAE felt that d specification duplicated pre-existing standards and wanted to withdraw the document in favor of those older and well-used documents. 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, all inspections shall be performed in accordance with the methods of inspection specified in 4.

20674 specification covers the requirements for electroless autocatalytic chemical reduction deposition of nickel-phosphorous alloy coatings on metal and composite surfaces. Aluminum alloys non-heat treatable, and beryllium alloys processed to improve adhesion of the nickel deposit.

Coated-test specimens shall be exposed to a neutral salt-spray test in accordance with ASTM B for hours.

The separate specimens shall be strips approximately 1-inch wide, 4-inches long, and 0. Class 2 coatings shall have a minimum hardness of knoop or equivalent vickers when tested in accordance with 4. It is recommended, therefore, that this specifications not be specified for new designs. However, it is not advised for new design. 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 of a basis material equivalent see 6. With two concurrent and identical specifications in force at the same time, confusion ran rampant. The lot shall be rejected if any coated article, part, or test specimen shows cracking or fracture of the basis metal. Unless otherwise specified, the coating shall be applied after all basis metal heat treatments and mechanical operations such as machining, brazing, welding, forming, and perforating of the part have been completed.