Brass Alloys and Their Applications
Brass is a general term for a set of copper-zinc alloys that may include additional metals such as lead. Different types of brass have different properties, but all brass is strong, machinable, tough, conductive, and corrosion resistant. This along with beauty and ease of production make brass one of the most widely used alloys.
Brass has, for centuries, been the metal of choice for many musical instruments. It’s an ideal alloy for the transport of water through pipes and fittings. It’s also appropriate for use in marine engines and pump parts. It should not be surprising that one of the first commercial uses of brass was on naval ships.
Another common usage of the metal comes from its non-magnetic nature. Clock and watch components, electrical terminals and munitions all require a metal that will not be affected by magnetism.
Brass Alloys and Their Applications
While compiling a complete list of all of the brass’ applications would be a colossal task, we can get an idea of the breadth of industries and the types of products in which brass is found by categorizing and summarizing some end-uses based on the grade of brass used.
Free Cutting Brass
Alloy C-360 brass, also called “free cutting brass,” is alloyed with copper, zinc, and lead. Free cutting brass is very easy to machine, but also offers the same toughness and corrosion resistance as other forms of brass. Some uses for free cutting brass include:
Nuts, Bolts, Threaded Parts
Terminals
Jets
Taps
Injectors
Valve Bodies
Balance Weights
Pipe or Water Fittings
Gilding Metal (Red Brass)
Gilding metal is a form of brass that is made up of 95% copper and 5% zinc. A soft brass alloy, gilding metal can be hammered or easily formed into desired shapes. Its unusual deep bronze color and ease of use make it ideal for craft-related projects. It’s also commonly used for artillery shells. Some other uses include:
Architectural fascias
Grillwork
Jewelry
Ornamental Trim
Badges
Door Handles
Marine Hardware
Primer Caps
Pen, Pencil and Lipstick Tubes
Engraving Brass
Engraving Brass also referred to as alloy C35600 or C37000, contains either 1% or 2% lead. Its name, not surprising, comes from its use in the creation of engraved nameplates and plaques. It may also be used for:
Appliance Rim
Clock Components
Builders Hardware
Gear Meters
Arsenical Brass
Arsenical brass (C26000, C26130 or 70/30 brass) contains about .03% arsenic to improve corrosion resistance in water. Like other forms of brass, arsenical brass is bright yellow, strong, and easy to machine. It’s also an appropriate metal to use in plumbing. Other uses include:
Heat Exchangers
Drawn and Spun Containers
Radiator Cores, Rubes, and Tanks
Electrical Terminals
Plugs and Lamp Fittings
Locks
Cartridge Casings
High Tensile Brass
High tensile brass is a particularly strong alloy which includes a small percentage of manganese. Because of its strength and non-corrosive qualities, it is often used for products that undergo a good deal of stress. Some examples include:
Marine Engines
Hydraulic Equipment Fittings
Locomotive Axle Boxes
Pump Casting
Heavy Rolling Mill Housing Nuts
Heavy Load Wheels
Valve Guides
Bushes Bearings
Swash Plates
Battery Clamps
International Standards Brass Rods
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