Has anyone tried to make their own SuperHard (or similar) by alloying pure antimony with whatever other lead they have? I've seen that Rotometals are selling 99% pure antimony either as small pellets or ingots, and it seems like a Good Thing.
I did read on http://lasc.us/SuperHard.htm that dealing with pure antimony was both difficult to alloy, and also potentially dangerous/toxic, but I have my reasons for asking.
While I respect the expertise and understand that it might simpler/better to just order some SuperHard, I have some logistical problems/opportunities. I have not found any source of high-sb alloy in this country, and have thus started to look elsewhere. Transatlantic shipping is probably not cheap, though.
However, I will be going to US for Christmas/New Year to visit my sister, and by coincidence she lives like a half hour drive from Rotometals in SanFrancisco. I could easily fit 5 lbs of Sb in my luggage, but 20 lbs of SuperHard will probably take up too much of my weight allowance.
So I would like to hear from anyone who tried it, whether successful or not.
Thanks in advance.
/cmk