Patent ID: 8273192

Claim:
A lead-free, bismuth-free free-cutting phosphorous brass alloy consisting of: zinc, in an amount exceeding 41 wt %; 56.0-58.25 wt % copper, in an amount such that the amount of zinc and copper totals between 97.0 wt % and 99.5 wt %; 0.59 to 1.6 wt % P; and other elements in an amount between 0.005 and 0.6 wt %, which comprise at least two elements selected from the group consisting of A1, Si, Sb, Sn, Rare earth element (RE), Ti and B; and the balance being unavoidable impurities; wherein the elements phosphorus and copper form an intermetallic compound Cr 3 P; and wherein the at least two other elements comprise B and an element selected from the group consisting of A1, Si, Sb, or Ti.