If I am going to melt metal I am going to need a pot to melt it in, and while I wanted to buy a commercial crucible I did not want to spend the money on it and the tools to fit it, until I decided if this was something I was going to keep doing. So I decided to make a cheap DIY crucible to last one or two casting sessions just to see if I liked it.
Due to some of my propane experiments lately, I have some empty propane tanks. While cutting into them is dangerous, I decided to do just that. To mitigate the danger, I pulled out the safety valve, and dumped it in a bucket of water to try to displace any propane still in the tank. I then very slowly drilled a couple holes in the top of the tank. No propane smell came out of the holes, but I still filled it with water and let it sit for 24 hours submerged in a bucket of water.
I then cut the top off of the tank, drilled two holes for eye hooks, and then heated the lip of the tank up to red hot and then wacked it with my hammer until I formed a pouring spout.
This is a very simple and rudimentary crucible, and due to the thin metal of the tank, I don’t expect it to last long. However, if I succeed in making something cool the first couple times, I bet the wife will sign off on me upgrading my equipment.
My main concern with using the propane tank is that the tank was brazed from two separate parts, and I worry that when brought up to temperature, the brazing line will be the point of failure. Oh well I guess if that happens you will get another FAIL video…