MIL-STD-870 Cadmium Plating, Low Embrittlement, ElectrodepositonThis standard covers the process and materials required for the electro-deposition of cadmium on high strength steel substrates. Subsequent heat treating techniques needed to insure low embrittlement of steel are also described. This process is not authorized for use on steel heat treated above 1.65 X 10 9 PASCALs Pa 240,000 pounds per square inch {psi} without the approval of the applicable procuring activity.

Pages 1 - 2 - 3 - 4 - 5 - 6 - 7 - 8 - 9 - 10 - 11 - 12 - 13 - 14

twice weekly.

MIL-STD-870C

w/CHANGE 1

b. Hydrogen detection instrument testing shall be conducted at least

c. The lambdapc (λpc) as determined by the test procedure shall be less than or equal to 80. if the λpc is greater than 80 but less than or equal to 96, treat the solution and re-test. If the λpc is greater than 96 but less than or equal to 130, halt production investigate and correct the problem, and re-qualify the solution per paragraph

5.7. If λpc greater than 130 halt production reject all parts plated since the last acceptance test, correct the problem and re-qualify the solution per paragraph 5.7.

d. If the embrittlement test has not been performed in the 30 days preceding the processing of the material batch the bath must be re-qualified in accordance with paragraph 5.7.

5.9.2 Method 2, Notched tensile tests.

a. Two standard specimens of the type noted in paragraph 5.7 shall be processed in conjunction with the plating of items in accordance with all of the requirements of this standard. The specimens shall be subjected to a sustained load test of 75 percent of the ultimate notched tensile strength of the material for 200 hours minimum and shall meet the requirements of paragraph 4.4. Failure of any one of the specimens shall constitute failure of the test and production shall cease until the cause of the failure is determined and the bath is re-qualified. Acceptance of items completed after the last successfully completed acceptance test shall be withheld until the extent and cause of the failure has been determined.

b. The test for embrittlement shall be conducted as often as deemed necessary with the maximum interval of every 30 calendar days. If the embrittlement test has not been performed in the 30 days preceding the processing of the material batch the bath must be re-qualified in accordance with paragraph 5.7.

5.10 Safety and health. This document specifies the use of certain materials, which have been listed in 29 CFR 1910 (OSHA Standards) as "Toxic and Hazardous Substances." Personnel exposure to these materials during the process must be limited to the values specified in the applicable portions of the OSHA Standard 1910.1000.

6. NOTES:

(This section contains information of a general ore explanatory nature that may be helpful but is not mandatory.)

6.1 Intended use. This standard provides guidance on the procedures and processes for cadmium plating, low embrittlement, and electro-deposition for the repair of existing or procurement of new parts on the landing gear for all military aircraft.

6.2 Subject term (key word) listings:

Method Procedure Sequence Type