Most suitable for high spped machining with alimited ability to be cold worked. 4% lead permits extra high machining sppeds . hardness typically 115Hv
0.3m Min cut
CZ121 BRASS ALLOY
CuZn38Pb4
Cu Zn Pb
58 38 4
Proof stress 0.2% 110 – 260 N/mm2
tensile stress 430-530 ”
Elongation % 30-15
hardness 90-160Hv