• Copper and zinc form solid
solution up to ~ 39% zinc at
456
oC, giving a wide rage of
properties.
• Sn, Al, Si, Mg, Ni, and Pb are
added elements, called ‘alloy
brasses’.
• Commercially used brasses can be
divided into two important groups:
1) α brasses (hypo-peritectic)
with α structure containing
upto ~35% Zn.
2) α+β brasses (hyperperitectic)
with α+β two
phase structure, based on
60:40 ratio of Cu and Zn