Brass

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Brass

An alloy of copper and zinc. It has low friction and so is used in manufactured products such as gears and valves. It is also used in musical instruments.. It may be traded as a commodity on exchanges such as the London Metal Exchange.
References in periodicals archive ?
Limited Tenders are invited for 1 brass flat(20mmx4 mmthick) is 410 cu zn37 cu 61.5/64% pb 0.30% max fe 0.10% max zn rem, 2 leaded brass free cutting rd 4mm dia cu+ni 56/59% pb 2.0/3.5% fe 0.35% max zn reminder,
In most cases, the switch from leaded to Bi no-lead alloy can be handled with very little gating modifications to existing patterns, and melting and pouring is very similar to the leaded brasses except for a slight increase in pour temperature.
Current available low-lead alloys offer casting solutions, but vary in their ability to be safely and effectively recycled if they should become cross-contaminated with, or cause cross-contamination of, some of the other low lead alloys or the leaded brasses. Currently, the value of the resultant cross-contaminated material may be considerably reduced because this material must be refined or diluted when consumed back either by the facility or an ingot maker.
Machining--Copper-bismuth alloys have machining characteristics similar to leaded brasses but may be less forgiving.
These new alloys have machining characteristics similar to the leaded brasses but require machining fluids for optimum machining performance.
Sand castings simulated by Robert Pehlke and James Wilkes were poured in a variety of materials (carbon steel, aluminum and leaded brasses).
Whiting, CANMET/Materials Technology Laboratory, discussed their AFS research to determine the effect of bismuth (Bi) and selenium (Se) additions on the mechanical properties of leaded brasses (C83600 and C84400).