Re: I made my own Water/Fire-proof Metal Bitcoin Cold Storage, short guide.
I can use a propane torch and get it to 2000F but I'm not sure that's a fair test:
Using the propane torch to me seems more like a test of the metal quality/spec than proof of survivability. I could easily have spent 8x more on really high quality steel/titanium/tungsten to be certain it would survive but that takes it out of the realms of an affordable home project for most people.
I got the metal business cards from ebay, and as it's a prototype it was on the cheap. I think all steel has a melting point above what my open fire produces (and a house fire), my concern is that the card softens and distorts before that melting point, if it does I would consider it a failure.
Using the propane torch to me seems more like a test of the metal quality/spec than proof of survivability. I could easily have spent 8x more on really high quality steel/titanium/tungsten to be certain it would survive but that takes it out of the realms of an affordable home project for most people.
I got the metal business cards from ebay, and as it's a prototype it was on the cheap. I think all steel has a melting point above what my open fire produces (and a house fire), my concern is that the card softens and distorts before that melting point, if it does I would consider it a failure.
not meant to be a fair test, just a cheap and dirty test. 2000F is still below the melting point of the metals mentioned in the thread (IIRC), figure if it can survive that, it can survive a house fire, no ifs, ands or buts.
too bad there are no cheap IR temp guns that can hit 1100F (typical house fire temp), my cheap one maxes out at 830F. otherwise you could use the IR gun with the torch to hit 1100F and hold it there to see if it deforms/melts.
only some fireplaces/fuels burn at 1100F so not sure how you could easily and reliably check that.