I was at my local scrap dealer today and purchased some lead. In there together with sheat lead and pipes there were some ingots of different shape and weight. I threw them on the floor and as I suspected they were hard, and had a ring to them when dropped. With this kind of ring my experience has thought me that it could be an alloy with either Antimonny or Zink. As you all know the first is good and the latter makes it unusable for boolit casting.
I expressed my scepticism to the dealer and he went to get the analyser. He shot them with his XRF gun. The two first ingots were good, 8% sb! Cool!!
The last suspicious ingot showed 1.65% sb and no zn but 3% Fe and somthing that could be contamination of the sample. That said the * next to the 3% shows that the reading is somewhat uncertain.
I've encountered Fe before but often maybe just a tad above zero. Approximately 0,1% and it causes no problem.
My question is: Does 3% Fe cause a problem using it as boolit alloy or is the Fe contamination shimmed of when fluxing? My plan for this lead is to make it 2-3-95 alloy for standard revolver loads. I have pewter and monotype of known hardness so if I can use the ingot this is no problem. Can I?
Attaching pics
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