Tin Bronze With Bismuth & Lead
Tin Bronze With Bismuth & Lead
(OP)
I am trying to identify the source for a tin bronze bearing alloy containing 1.5% Pb and 2.2% Bi. It is a dry bearing and these elements add lubricity. I can understand the presence of either lead or bismuth but not the presence of both together. I checked the UNS copper alloys (i.e. CDA) but they do not show both elements used in such significant quantities in the same alloy.
Any suggestions?
Any suggestions?





RE: Tin Bronze With Bismuth & Lead
RE: Tin Bronze With Bismuth & Lead
Have you found the alloy in question? The reason I ask is that I too am in search of said alloy. Is your application an "H" bearing by chance?
Thanks, Skeener
RE: Tin Bronze With Bismuth & Lead
The only reason I would think to use bismuth in a leaded Sn-bronze is to substitute for lead in order to reduce the lead content since bismuth also reduces the stickiness of the alloy.
MH
http://www.linkedin.com/pub/luke-autry/1b/510/566
RE: Tin Bronze With Bismuth & Lead
Thanks
RE: Tin Bronze With Bismuth & Lead
RE: Tin Bronze With Bismuth & Lead
1. The price of bismuth is about $ 11.00 a pound and the price of lead is about $ 1.00 a pound, so it pays to use as much lead as permitted and as little bismuth as needed.
2. While bismuth is very similar to lead, lead has higher lubricity and is distributed more evenly in a copper matrix than bismuth.
ds
RE: Tin Bronze With Bismuth & Lead
RE: Tin Bronze With Bismuth & Lead
Thank you for the information.
Thanks, Skeener