Tuesday, January 22, 2008

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.

DIN 95 - Slotted Oval Head Machine Screws Specifications


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.

Sunday, January 20, 2008


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-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

Saturday, January 19, 2008


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

Friday, January 18, 2008

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

Tuesday, January 15, 2008

Brass is an alloy consisting mainly if not exclusively of copper and zinc.

Brass is an alloy consisting mainly if not exclusively of copper and zinc. The brasses may be conveniently divided into two groups according to their malleability, the dividing line being approximately the composition of 55 percent copper and 45 percent zinc. All the higher copper alloys are workable either hot or cold and in some cases both hot and cold,

Brass is any alloy of copper and zinc; the proportions of zinc and copper can be varied to create a range of brasses with varying properties.[1] Note that in comparison bronze is principally an alloy of copper and tin.[2] Despite this distinction, some types of brasses are called bronzes. Brass is a substitutional alloy. It is used for decoration for its bright gold-like appearance; for applications where low friction is required such as locks, gears, bearings, ammunition, and valves; for plumbing and electrical applications; and extensively in musical instruments such as horns and bells for its acoustic properties.

Brass has a muted yellow color, somewhat similar to gold. It is relatively resistant to tarnishing, and is often used as decoration and for coins.

Brass types

  • Admiralty brass contains 30% zinc and 1% tin which inhibits dezincification in most environments.
  • Alpha brasses (Prince's metal), with less than 35% zinc, are malleable, can be worked cold, and are used in pressing, forging, or similar applications. They contain only one phase, with face-centered cubic crystal structure.
  • Alpha-beta brass (Muntz metal), also called duplex brass, is 35-45% zinc and is suited for hot working. It contains both α and β' phase; the β'-phase is body-centered cubic and is harder and stronger than α. Alpha-beta brasses are usually worked hot.
  • Aluminum brass contains aluminum, which improves its corrosion resistance. Used in Euro coins (Nordic gold).
  • Arsenical brass contains an addition of arsenic and frequently aluminium and is used for boiler fireboxes.
  • Beta brasses, with 45-50% zinc content, can only be worked hot, and are harder, stronger, and suitable for casting.
  • Cartridge brass is a 30% zinc brass with good cold working properties.
  • Common brass, or rivet brass, is a 37% zinc brass, cheap and standard for cold working.
  • DZR brass is Dezincification resistant Brass with a small percentage of Arsenic.
  • High brass, contains 65% copper and 35% zinc, has a high tensile strength and is used for springs, screws, rivets.
  • Leaded brass is an alpha-beta brass with an addition of lead. It has excellent machinability.
  • Low brass is a copper-zinc alloy containing 20% zinc with a light golden color, excellent ductility and is used for flexible metal hoses and metal bellows.
  • Naval brass, similar to admiralty brass, is a 40% zinc brass and 1% tin.
  • Red brass, while not technically brass, is an American term for CuZnSn alloy known as gunmetal.
  • White brass contains more than 50% zinc and is too brittle for general use.
  • Yellow brass is an American term for 33% zinc brass.
  • Gilding metal is the softest type of brass commonly available. It is an alloy of 95% copper and 5% zinc and is typically used for ammunition components
know more : - http://en.wikipedia.org/wiki/Brass
know for brass products : www.deepri.com

ISO Tolerances

General tolerances in threads, holes, grinding, shapping, milling, boring and lapping are generall accepted whole over world. Which has some standards diameter described in http://www.brassnutbolt.com/din/technical/information/tech_iso_tolerances.html
Example limits and fits unsing hole basis :
Loose running, free running, easy running, sliding, close clearance, slight interference, press fit, medium drive, force etc.,

Monday, January 14, 2008

Brass Metal History

Brass is a metal composed primarily of copper and zinc. Copper is the main component, and brass is usually classified as a copper alloy. The color of brass varies from a dark reddish brown to a light silvery yellow depending on the amount of zinc present; the more zinc, the lighter the color. Brass is stronger and harder than copper, but not as strong or hard as steel. It is easy to form into various shapes, a good conductor of heat, and generally resistant to corrosion from salt water. Because of these properties, brass is used to make pipes and tubes, weather-stripping and other architectural trim pieces, screws, radiators, musical instruments, and cartridge casings for firearms.

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.


Calculate weight of Brass and Copper

Information to calculate the weight of brass and copper.
Mathematically, the ratio has been design to calculate the weight of bars or rods from the physical charasteristics of each element. Please check http://www.brassbilletsrods.com/calculation.htm to calculate weight.

Metic thread identification chart

A screw thread in conformity with this International Standard is designated by the letter M followed by the values of the nominal diameter and of the pitch expressed in millimeters separated by the sign x.
Example : M 8 x 1.0 (Fine pitch 1.0)
The absence of the indication of pitch means that the coarse pitch is specified.
Example : M 8 (Coarse pitch 1.25).
Get detailed chart on http://www.brassnutbolt.com/din/technical/information/tech_thread_id_metric.html

Sunday, January 13, 2008

Characteristics of Brass Products

Brass Is Utilized Primarily for Water in Commercial Plumbing and OEM Applications, but Is Also Used in Oil, Gas and Steam Applications. Brass Piping Products Were Specified in Commercial Codes Prior to the Advent of Copper Tubing and Fittings (www.brasspartfittings.com) - Therefore, There is Excellent Demand for Maintenance and Repair Purposes Throughout the Northeast. Although the Product Lines Are Very Mature, Many OEM's and Municipalities Are Changing From Traditional Malleable Iron and Galvanized Applications to Brass Because of Longevity and Due to Superior Corrosion Resistances and Aesthetics.

Why people use BRASS metal ?

Brass Offers Good Corrosion Resistance From Water and Heat and Resists Attack From Salt Water and Acids, Minerals and Peaty Soils Contained in Water. Relative Softness of Metal Provides for a Tight Seal and Ease of Installation. Brass Offers Many of the Same Advantages of Copper, With a Heavier Wall. Find out more on www.deepri.com

Saturday, January 12, 2008

Copper LME

Copper cathode prices moved to US$7194 cash settlement yesterday. There is slightly movement to corresponding alloys like brass base where copper content is more than 55%. Due to that brass perton / price moved up.

Friday, January 11, 2008

Brass Prices Soaring

Local brass scrap and its utensils price are soaring to its all time high. It is now almost 3 times than it was 3 years back. Scrap from european and uk market is costlier due to appreciation in rupee. Less import from those countries than it used to be.

New development

We have developed and enhanced our factory with latest high tech machines for the new products dispayed in web www.brassbilletsrods.com.