So I'm looking at making some rings (plain bands) but the alloy I really want to use is not available from my supplier here in Australia (temporary issue, though no time frame on resolution). Nearest match they make is Pt950/Ir/Cu but I can't find much info on this alloy working properties hardness etc. I'm loath to assume that it will be exactly like Pt950/Ir. So I was wondering if anyone has worked with it and if they know how it holds up as a plain band material for intermittent wear.
Also if anyone has heard of copper being an issue in Pt alloys for those with reactive dermatitis to copper, who have had reactions to copper from gold and silver alloys.