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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All steel parts having an ultimate tensile strength ofpsi, or above, shall not as coated without approval of the procuring activity. Class 2 hardness coatings: Number of this specification. Iron, copper, aluminum, nickel, cobalt, beryllium, titanium, and their alloys can be plated directly. Composites can be plated directly by using special pretreatments to prevent the basis material from contaminating the bath or to obtain adequate coating adhesion.

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

Class 1 Class 2 Class 3 Class 4 1. Sampling plan B – Sampling procedures for evaluating hydrogen embrittlement a,s destructive test – Class 1 and 2: Each part, or specimen shall be tested as specified in 4.

Should you need copies of any of the standards mentioned, or have any further questions, please get in touch. The part shall be considered nonconforming if one or more measurements fail to meet the specified minimum thickness.

Sampling inspection, as part of manufacturing operations, is an acceptable practice to ascertain conformance to requirements, however, this does not authorize submission of known defective material, either indicated or actual, nor does it commit the government to accept defective material.

Aluminum alloys, heat-treatable, processed to improve adhesion of the nickel deposit. Any part numbers established by the original specification 2074 unchanged. Failure of one or more of the test specimens shall constitute failure of the lot. The selected samples shall be subjected to a sustained tensile load equal to percent of the maximum design yield load for which the part was designed.

Click here for instructions on how to enable JavaScript in your browser. 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. Equivalent basis material includes chemical composition and surface finish prior to coating application.

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When tested in accordance with 4. Coated parts–that is, those parts used in air compressors, missile-fuel injector plates, pumps, reciprocating surfaces, ajs so forth are protected from oxidation, corrosion and wear.

Excellent uniform deposits are produced on irregular parts. Stress relief heat treatment: 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 26704 separate specimens coated concurrently with the parts represented.

At least once per calendar quarter, a coated part, or a separately coated specimen prepared in accordance with 4. Your email address will not be published. It is encouraged that recycled material be used when practical as long as it meets the requirements of aams document see 3. When specified, the coated parts 266074 be marked with a fluid not affected by water, or rub off, or smear during shipment or storage; and shall carry ajs tag giving the following information: It is recommended, therefore, that this specifications not be specified for new designs.

Hydrogen embrittlement relief bake: The coating is intended for use when hard and smooth surfaces are required on coated parts.

The inspection requirements specified herein are classified as quality conformance inspection see 4. 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.

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. A bake for hydrogen embrittlement relief is not amw a heat treatment. Nickel Electroless autocatalytic chemical reduction 6. This is a stabilized document.

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.


Prior to cleaning and coating, all steel parts having a hardness of Rockwell C40 or above, which have been machined, ground or surface hardened includes cold worked but not shot peened surfacesshall be given a stress-relief heat treatment at a temperature that will produce maximum stress relief without reducing the hardness to less than the specified minimum. This section contains information of a general or explanatory nature that may be helpful, but is not mandatory.


The nickel coatings shall be classified in accordance with the thermal treatment applied subsequent to plating. Heat treated to obtain required hardness: As you can see by my posting, the MIL-C has had a long strange history! 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 cc manufacturer agrees to maintain the same manufacturing procedures or develops alternative acceptable manufacturing procedures.

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. Sampling plan C – Sampling procedure for adhesion tests: Unfortunately, the MIL-C was not cancelled at that point in time.

Thanks so much for asking, Ed: The use of this report is entirely d, and its applicability and suitability for any particular use, including any patent infringement arising therefrom, is the sole responsibility of the user. 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 amd of SAE.

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.