I have to join metal to metal (Aluminium or SS piece onto a vertical SS wall) that could take a shear load of say, 600gm with an area of contact of around 2cm^2. The environment is above boiling surface of water. So, the adhesive should be resistant to 100 deg C temperature, and moisture - with water droplets. Check the image for setup. What are the best adhesives for this purpose? I have checked Araldite, but specs say its max temp is around 65 deg C. Any suggestions? Also desirable is if the adhesive is semi-permanent: If I need to remove it and make the joining at any other location, it shouldn't be terribly difficult. Setup

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    $\begingroup$ Rivets or weld it ... $\endgroup$
    – Solar Mike
    Dec 14 '17 at 20:48
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    $\begingroup$ Why cant you use machine screws, ( with high temp silicone rubber adhesive to seal the threads) ? $\endgroup$ Dec 15 '17 at 13:55
  • $\begingroup$ Screws are an option, but I wouldn't prefer it since the location of joining may change in the future, leaving the existing screw hole open; and I wouldn't want the SS tank to be machined every time. I was hoping to find more of a temporary joining. $\endgroup$
    – VMG
    Dec 16 '17 at 7:14
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    $\begingroup$ No big deal then, if you have to move it in the future you can plug the old (unused) holes with set screws with a little silicone rubber adhesive on the threads. $\endgroup$ Dec 19 '17 at 20:48
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    $\begingroup$ Or if you want to be fancy, make your L-bracket with slots in it and have threaded studs mounted in the side of the enclosure, now you can bolt your bracket anywhere within the line-length of the slots. $\endgroup$ Dec 20 '17 at 20:58

You want to look at high temp RTV silicone adhesives. They can handle temps way above 100c. Typically found and used as make-a-gasket material on engines and commonly found at automotive stores.

Also, I'd like to see you use SS for the bracket to keep your thermal expansion co-efficient the same as the base part..I know it's not a lot of temperature change but it may help.

Lastly, I second the fasteners method per the comments because you will have a captured connection between the two parts.


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