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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When measuring heat-treated coatings containing more than 8 percent phosphorous, the instrument should be calibrated against heattreated standards of known coatings thickness or equivalent calibration foils. So in Octoberthe document was reinstated in the current Inactive Revision B and thus it remains to this day.

Your email address will not be published. Nickel Electroless autocatalytic chemical reduction 6. Issue of DODISS to be cited in the solicitation, and if required, the specific issue of individual documents reference see 2. SAE invites your written comments and suggestions.

SAE AMS-CB 化学镀镍(英文)_百度文库

Class 2 hardness coatings: Now one feature of mil spec reform is that a number of cancelled military specs and standards ended up being reprinted in their entirety by various industry associations. When specified, the coated parts shall be 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: Class and grade, and heat treatment or condition see 2607.

Class 1 Class 2 Class aams Class 4 1. Unless otherwise specified, the amms 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. Unless otherwise specified, all inspections shall be performed in accordance with the methods of inspection specified in 4.

Excellent uniform deposits are produced on irregular parts. 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 inspection requirements specified herein are classified as quality conformance inspection see 4. The nickel coatings shall be classified in accordance with the thermal treatment applied subsequent to plating. 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.

As you can see by my posting, the MIL-C has had a long strange history!


Sampling procedure for destructive tests of coating thickness. A lot shall consist of coated parts of the same type and class, same basis material, and of approximately the amw size and shape, coated under the same conditions and by means of the same coating process, and submitted for acceptance at one time.

The coating is intended for use when hard and smooth surfaces are required on coated parts. Formation of cracks that do not result in loss of plating adhesion is as. Failure of one or more of the test specimens shall constitute failure of the lot. A bake for hydrogen embrittlement relief is not considered a heat treatment. 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.

Each of the sample parts selected in accordance with 4.

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

It also shall be impossible to detach any area of the coating with a sharp instrument on the outside radius of the bent-test specimen. 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 of the processing.


Our drawing states to process parts to MIL-C Iron, copper, aluminum, nickel, cobalt, beryllium, titanium, and their alloys can be plated directly. Equivalent basis material includes chemical composition and surface finish prior to coating application. Samples shall be selected from each lot see 4. Aluminum alloys non-heat treatable, and aks alloys processed to improve adhesion of the nickel deposit. Sampling plan C – Sampling procedure for adhesion tests: A random sample of 4 parts shall be selected from each inspection lot which has more than 15 parts see 4.

Class 2 coatings shall have a minimum hardness of knoop or equivalent vickers when tested in accordance with 4. The lot shall be rejected if any coated article, part, or test specimen shows cracking or fracture of the basis metal. 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.

Heat treated to obtain required hardness: Periodic verification of the 266074 methods must be made in accordance with 4.

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

The separate test specimens used for f testing shall be 4 inches by 6 inches. 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. Still SAE felt that the specification duplicated pre-existing standards and wanted to withdraw the document 260744 favor of those older and well-used documents. All details of workmanship shall conform to the best practices for high quality coating.

However, it is not advised for new design. The hardness can be achieved by heating the part see 4.