Plain Brass
Brass compositions range from higher copper content to zinc contents as high as
40% or more. Brasses with less than 36% zinc are plain alpha solid solutions; but
Muntz metal, with 40% zinc, contains both alpha and beta phases.
The principal plain brasses of interest in building, and their properties are:
Commercial bronze, 90% (90.0% copper, 10.0% zinc). Typical uses are forgings, screws, weatherstripping, and stamped hardware. General properties include
excellent cold working and high ductility.
Red brass, 85% (85.0% copper, 15.0% zinc). Typical uses are dials, hardware,
etched parts, automobile radiators, and tube and pipe for plumbing. General properties are higher strength and ductility than copper, and excellent corrosion resistance.
Cartridge brass, 70% (70.0% copper, 30.0% zinc). Typical uses are deep drawing, stamping, spinning, etching, rolling—for practically all fabricating processes—
cartridge cases, pins, rivets, eyelets, heating units, lamp bodies and reflectors, elec-
4.82 SECTION FOUR
trical sockets, drawn shapes, etc. General properties are best combination of ductility and strength of any brass, and excellent cold-working properties.
Muntz metal (60.0% copper, 40.0% zinc). Typical uses are sheet form, perforated metal, architectural work, condenser tubes, valve stems, and brazing rods.
General properties are high strength combined with low ductility.
Brass compositions range from higher copper content to zinc contents as high as
40% or more. Brasses with less than 36% zinc are plain alpha solid solutions; but
Muntz metal, with 40% zinc, contains both alpha and beta phases.
The principal plain brasses of interest in building, and their properties are:
Commercial bronze, 90% (90.0% copper, 10.0% zinc). Typical uses are forgings, screws, weatherstripping, and stamped hardware. General properties include
excellent cold working and high ductility.
Red brass, 85% (85.0% copper, 15.0% zinc). Typical uses are dials, hardware,
etched parts, automobile radiators, and tube and pipe for plumbing. General properties are higher strength and ductility than copper, and excellent corrosion resistance.
Cartridge brass, 70% (70.0% copper, 30.0% zinc). Typical uses are deep drawing, stamping, spinning, etching, rolling—for practically all fabricating processes—
cartridge cases, pins, rivets, eyelets, heating units, lamp bodies and reflectors, elec-
4.82 SECTION FOUR
trical sockets, drawn shapes, etc. General properties are best combination of ductility and strength of any brass, and excellent cold-working properties.
Muntz metal (60.0% copper, 40.0% zinc). Typical uses are sheet form, perforated metal, architectural work, condenser tubes, valve stems, and brazing rods.
General properties are high strength combined with low ductility.
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