[AT] 90wt oil and fords ( yellow metals)

[DAVIESW739 at aol.com]

I found this on the  net.
Walt
--------------------------------------------------------
Brasses:  These alloys contain zinc as the principal alloying element and may 
have other  designated elements. The wrought alloys are comprised of 
copper-zinc alloys,  copper-zinc-lead alloys (leaded brasses), and copper-zinc-tin 
alloys (tin  brasses). The cast alloys are comprised of copper-zinc-tin alloys 
(red, semired  and yellow brasses), manganese bronze alloys (high-strength 
yellow brasses),  leaded manganese bronze alloys (leaded high-strength yellow 
brasses), and  copper-zinc-silicon alloys (silicon brasses and bronzes). 

Bronzes: Wrought bronze alloys comprise four main groups:  
copper-tin-phosphorus alloys (phosphor bronzes), copper-tin-lead-phosphorus  alloys (leaded 
phosphor bronzes), and copper-silicon alloys (silicon bronzes).  Cast alloys also 
have four main families: copper-tin alloys (tin bronzes),  copper-tin-lead 
alloys (leaded and high-leaded tin bronzes), copper-tin-nickel  alloys 
(nickel-tin bronzes), and copper-aluminum alloys (aluminum bronzes).  

Copper-nickels: These are either wrought or cast alloys containing nickel  as 
the principal alloying element. 

Copper-nickel-zinc alloys: These are known as nickel silvers, from their  
color. 

Leaded coppers: These are cast alloys containing 20% lead or more.