History of Brass

Ancient metalworkers in the area now known as Syria or eastern Turkey knew how to melt copper with tin to make a metal called bronze as early as 3000 B.C. Sometimes they also made brass without knowing it, because tin and zinc ore deposits are sometimes found together, and the two materials have similar colors and properties.
By about 20 B.C.-A.D. 20, metalworkers around the Mediterranean Sea were able to distinguish zinc ores from those containing tin and began blending zinc with copper to make brass coins and other items. Most of the zinc was derived by heating a mineral known as calamine, which contains various zinc compounds. Starting in about 300 A.D., the brass metalworking industry flourished in what is now Germany and The Netherlands.
Although these early metalworkers could recognize the difference between zinc ore and tin ore, they still didn't understand that zinc was a metal. It wasn't until 1746 that a German scientist named Andreas Sigismund Marggraf (1709-1782) identified zinc and determined its properties. The process for combining metallic copper and zinc to make brass was patented in England in 1781.
The first metal cartridge casings for firearms were introduced in 1852. Although several different metals were tried, brass was the most successful because of it's ability to expand and seal the breech under pressure when the cartridge was first fired, then contract immediately to allow the empty cartridge casing to be extracted from the firearm. This property led to the development of rapid-fire automatic weapons.
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DIN 95 - Slotted Oval Head Machine Screws Specifications

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C63020 Nickel Aluminum Bronze

C63020, Nickel Aluminum Bronze is a martensitic, heat-treated copper alloy, and the strongest in the Nickel Aluminum Bronze family. In some cases this alloy can be a substitute for Beryllium Copper, or other high nickel alloys, due to its exceptional properties. Its very high mechanical properties and hardness, with good ductility and toughness, make it ideal for applications involving very heavy loads, extreme abrasive wear, corrosion service, friction, deformation, and high temperatures.

C46400 NAVAL BRASS ROUND BARS, PLATES, DISCS & RINGS

C46400 Naval Brass provides a high degree of corrosion resistance to seawater at even higher than normal temperatures while also assuring greater strength and rigidity. It possesses excellent capacity for hot working and adapts well for hot forging and pressing. This naval brass also lends itself to drawing, forming, bending and heading. It is readily soldered, brazed and welded. Typical applications include nuts, bolts, rivets, valve stems, pump shafts and marine hardware. Conforms to specification ASTM B21.

C36000 FREE-MACHINING BRASS ROUND BARS & HEXAGONS

C36000 Free-Cutting Brass is ideally suited for high speed machining operations with its superior machinability, thread rolling and knurling characteristics. Its machinability rating of 100 is standard against which all other copper alloys are rated. It is easily soldered or brazed and has good resistance to corrosion. Typical applications included gears, pinions, plumbing ware fittings, adapters, valves, valve stems and screw machine products. Conforms to specification ASTM B16

C10100 OXYGEN-FREE (OFHC) COPPER ROUND BARS

C10100 Oxygen-Free Copper is produced by the direct conversion of selected refined cathodes and castings under carefully controlled conditions to prevent any contamination of the pure oxygen-free metal during processing. The method of producing O.F.H.C. Copper insures extra high grade of metal with a copper content of 99.99%. With so small a content of extraneous elements, the inherent properties of elemental copper are brought forth to a high degree. Characteristics are high ductility, high electrical and thermal conductivity, high impact strength, good creep resistance, ease of welding, and low volatility under high vacuum. C10100 Copper Conforms to ASTM B187 for round bar products. http://www.brassbilletsrods.com/copper_alloys/copper_alloys.html

Copper Alloy No. C83600

Applications :
Pump components, small gears, water impellers and housings, marine fittings, flanges, low pressure valves and fittings, pipe fittings, plumbing fixtures, ornamental fixtures. For mechanical properties of copper alloy no. C83600 basically called as Gun Metal or Red Brass
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