Brass is copper-zinc alloy.The mechanical performance of brass waries with its content of zinc.High zinc contentcontributes to higher strength and lower plasticity.The zinc content in brass shall not be more than 459c.or the brasswill become britle and it sperformance will go bad, if 1%* oftin is added to brass it will oreatly improve its resistanceagainst seawater corrosion and ocean atmosphere corrasion so such alloy is named as"Naval Brass".Tin can impr-ove machinability of brass.Lead-brass is also kmomn as easily-machinable copper.The main puroose of addina somelead is to improve machinability and wearability.Copper for carving is a kind of lead-brass.Most of brass boasts goodluster.high machinability and flexibility.easily galwanized or coated.