AMS 5717 Material compatibility with hydrazine
AMS 5717 Material compatibility with hydrazine
(OP)
Hello, I need some assistance in regards to material. I am working with an old print that calls out for ams-5717 specification for the material. However, the material is not available in the size requirements.
Can anyone suggest an alternate materials. It will be used with hydrazine.
Can anyone suggest an alternate materials. It will be used with hydrazine.





RE: AMS 5717 Material compatibility with hydrazine
Here is a NASA flyer that briefly discusses the long term compatibility of some metals with MMH exposure.
RE: AMS 5717 Material compatibility with hydrazine
Unfortunately I don't have a current copy.
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Plymouth Tube
RE: AMS 5717 Material compatibility with hydrazine
If you deal with hydrazine quite a bit, then the book you want to find is Eckhardt Scmidt's Hydrazine and Its Derivatives, you'll probably need to visit an Engineering library to find a copy.
RE: AMS 5717 Material compatibility with hydrazine
One benefit from the billions of our tax dollars spent on NASA programs over the years is the incredible wealth of technical data from NASA research made available to the public. This information can be accessed on the NTRS website. It's a wonderful resource.
RE: AMS 5717 Material compatibility with hydrazine
Longer-term tests have been conducted under various contracts (NASA, DOE, DoD, and a fair number of commercial ones) to investigate storage, and/or piping, and/or reaction chamber (decomposing hydrazine), exposure of materials to hydrazine and its derivatives, and the bulk of such data has been collected (and a substantial amount of that generated) by the book author mentioned previously. Any NASA document written prior to about 10 years ago is likely cited in the most updated version of the book.
But, without the OP responding, we don't know what level of exposure his part must survive...
RE: AMS 5717 Material compatibility with hydrazine
The parts are relatively small (various sizes under 2-1/2" OD and no longer that 6"). They will be machined then welded to a 11 gauge 304L sheet metal. The temperature should not exceed 200°F and exposure per cycle would be less than 2 hrs. It should not be used more than 2 to 3 times a year.
Based on the information I did find, the ultimate tensile strength of the spec material is 107 ksi at 70°F.
I think that the material was selected primarily for the corrosion resistance, then strength with temperature lagging at the end.
I will continue to go through the NASA papers that were recommended.
thank you again
RE: AMS 5717 Material compatibility with hydrazine