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Well... we can't require certain storage conditions. Anyway, the munition, of course, will be stored in a controlled environment facility, but it's for sure not hermetically sealed or filled with argon. Also, we can't seal the device because it must have openings towards client's part of the...

I wish we could change storage conditions as we want. They were set by our client who integrates our mechanism into his system. Actually, the munition is stored in an outer case with silica gel bag, but the munition itself isn't sealed. Anyway, what we got is a spec which explicitly requires...

...this is a part of the mechanism. All these items are made of steel, but they contact aluminum parts which I cannot show here. The bore in the slotted cylinder is 5.5 mm dia., its length is 30 mm.

Sorry, I've been away for a long time... Thank you very much for your answers, they're very helpful! Regarding the design-I'm talking about Coke can size electro-mechanical munition subsystem, with motors, levers, lead screws and controller PCB inside, which has to be stored for 20 years at...

EdStainless, Sorry, haven't got it... what kind of restrictions? Could you advise on a better steel? I think having the plating it shouldn't be stainless steel, am I right?

It may be wet, outdoors, and the surfaces cannot be isolated.

Hi Dik, We know that, but for some applications, like aviation, it's still widely used. Anyway, I'd be thankful for any advice regarding alternative plating (like IVD) as well.

Hi, In order to provide long-term galvanic corrosion protection for steel parts contacting other aluminum parts we'd like to plate steel parts with cadmium (already having alodine coating on aluminum). Also, these steel parts are of high precision and must withstand very high loads, so...

Thank you!

Well... but how to bring the outer layer to the pads on the same side? Can I use vias on a flex?

So in dry environment there is nothing to worry about? And if to chose the hardware for aluminum parts, which kind would you prefer-carbon or stainless steel?

EdStainless, And what alloy would you choose for the "cylinder" (the transparent part) and the "piston" (the orange one)? One of the most significant factors in this design is the cost, any dollar we can strip off the production costs is important. WKTaylor, The temperature range is a standard...

Hi, I have to design how to solder some very narrow double layer flex to another PCB by hot bar soldering process. The flex should have the same width at the and and cannot be widened and, also, cannot have a rigid PCB area at the end. Is it possible at all? How to bring two layers of conductive...

Is it OK to use passivated stainless steel hardware (retaining rings, screws, parallel keys etc) on Aluminum 7075-T6 parts? The product will be stored in a sealed package, but for tens of years. Or it will be better to use some carbon steel stuff with less electric potential difference between...

EdStainless, Thank you so much! Actually, I can show some screenshots, the length of the link is about 12 mm. Do you think it's a good idea to make the orange piston from C86300 bronze and the rest of the parts from 17-4 PH?

Just to make things clear-of course, the device is tested, but not on the desk in the lab. Sorry that I cannot disclose more information...

israelkk, In our case a lab test which can simulate the real loads isn't available, so we do our best and hope the design will work IRL. For a while, we succeeded doing this :) Anyway, some friction wear here isn't an issue, if I understand you correctly, because the lab test doesn't apply even...

tbulena, Unfortunately, I cannot disclose too much info, but we're talking about tens of thousands of g's during counted milliseconds. EdStainless, Thank you so much, this is very helpful! What would you say about the machinability of both alloys? Also, shouldn't I worry about the deformation...

What kind of info?

Hello, I have to design some miniature stainless steel parts like shafts and linkages which should withstand very high dynamic loads during very short time. Which steel is better: 17-4 PH or 420 SS? Thanks, Max