This adapter used on a control head of a power pallet truck is made from yellow brass. Converted from a fabrication of 13 components, this casting helped reduce cost savings by 25% and achieve required strength properties to fi ght wear and tear.
welding). These alloys are used in high thermal and electrical conductivity ap- plications, such as electrical connectors. High Coppers (C81400 to C82800)— High copper alloys (more than 95.1% copper) are unique in that they combine high strength with high thermal and electrical conductivity.
Chromium-Copper (C81400 to 81540)—Containing up to 1.5% chromi- um, the strength of these alloys is twice that of pure copper, but its electrical conductiv- ity is 80% of pure copper. Applications include welding clamps and high-strength electrical connectors.
Copper-Beryllium (C82000 to C82800)—These alloys contain 0.35- 2.85% beryllium as the major alloying element and are age- or precipitation- hardened. They achieve high strength due to the precipitation of a fi ne second phase during heat treatment. Copper beryllium
alloys either achieve high conductivity at moderate strength or moderate conductiv- ity at high strength.
Brasses The brasses (C83300 to C85800 and
C89320 to C89940) are the most com- mon casting alloys and are made of copper and zinc. Red Brass (C83300 to 83810)—The red brasses are alloys of zinc (1-12%)
Table 1. Properties and Applications of Cast Copper-Base Alloys Alloy Family UNS Numbers Properties Coppers
High Copper Red Brass Semi-Red Brass Yellow Brass
Copper-Bismuth & SeBiLOY
Silicon Bronze & Silicon Brass
Tin Bronze
Leaded and High- Leaded Tin Bronze
and tin (0.2-6.5%) and may contain lead (0.5-7%). In red brass, lead is present to promote pressure tightness in service and to facilitate free machining dur- ing manufacturing. The red color is due to low zinc content. The highest volume red brass alloy (C83600) has been used commercially for hundreds of years and accounts for more tonnage than any other alloy.
Semi-Red Brass (C84200 to C84800)—Semi-red brass has higher zinc content than the red brasses, which reduces corrosion resistance, lowers raw material costs and lightens the color (but has little effect on strength). Because of their outstanding aqueous corrosion resistance, red brass and semi-red brass often are used in plumbing fi ttings, such as unions, valves and water meters.
Yellow Brass (C85200 to C85800)—
The yellow brasses are lower in cost than the red brasses because their zinc content is higher (20-41%). In addition, they have good castability, with some alloys being permanent mold cast or diecast. Yellow brass has a pleasant yellow color that can be polished to a high luster.
Applications
C80100 to C81200 soft, ductile, high electrical and thermal conductivity, good electrical connectors, hot metal handling corrosion resistance, moderate strength
C81400 to C82800 unique combination of high strength and thermal and electrical conductivity, high hardness, wear and fatigue resistance, corrosion resistance
C83300 to C83810 high aqueous and atmospheric corrosion resistance, moderate strength and electrical conductivity
C84200 to C84800 moderate corrosion resistance and strength
C85200 to C85800 pleasant yellow color, easily polished, lower corrosion resistance
C89320 to C89940 lubricity, good machinability without lead, meets potable water standards
Manganese Bronze C86100 to C86800 high strength (as cast), good wear resistance, moderate corrosion resistance
C87300 to C87800 moderate strength, high corrosion resistance, low melting point
C90200 to C91700 good corrosion resistance, ductility and wear resistance, reasonable strength, low friction coeffi cient vs. steel
C92200 to C94500 improved machinability and pressure tightness relative to tin bronzes, improved lubricity
Nickel-Tin Bronze C94700 to C94900 moderate strength, good corrosion and wear resistance
Aluminum Bronze C95200 to C95900 high strength, good corrosion, erosion-corrosion and cavitation resistance, good galling resistance
Copper-Nickels Nickel Silvers Leaded Coppers
Special Alloys- Incramet 800
C96200 to C96950 excellent seawater corrosion resistance, bio-fouling resistance, stress corrosion cracking resistance in ammonia, high strength
C97300 to 97800 good aqueous corrosion resistance, high castability, moderate strength, pleasant silver luster
C98200 to C98840 corrosion resistance of copper with favorable lubricity and low friction, high conductivity
good thermal conductivity, oxidation resistance and thermal fatigue resistance, high hot hardness
34 Metal Casting Design & PurChasing
electrical contacts, clamps, welding gear, bearings, molds for plastics
valves, pumps, plumbing and boat hardware, pipe fi ttings, terminal ends for electric cables
low-pressure water valves, plumbing, hardware, pipe fi ttings, faucets
decorative hardware, architectural trim, plumbing fi xtures, bushings, fi ttings
bearings and bushings, plumbing fi xtures, valves and fi ttings for potable water, food processing
gears, bolts, valve stems, marine fi ttings, propellers
bearings, gears, valve stems, intricate pump and valve components, boat propellers
bearings, piston rings, seal rings, valve fi ttings, gears, hydraulic and high-pressure steam parts, bells
similar to tin bronzes plus sleeve bearings
bearings, gears, nozzles, wear guides, valve and pump components, machinery parts, motion translation devices
propellers, pump impellers, pump and valve parts,
bearings, wear rings, marine hardware, pickling hooks and baskets
marine equipment including pump components, impellers, valves, ship tailshaft sleeves, pipes, pipe fi llings
valves, fi ttings, hardware for food and beverage
handling, seals and labyrinth rings in steam turbines, architectural trim, musical instrument valves
auto main and connecting rod bearings
glassmaking molds, plate glass rolls, marine hardware
2010 Casting sourCe DireCtory
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