New Delhi, Delhi
IndiaMART Member Since: 2009
Further combinations are available on request. For example, all white parts on request. For example, all white parts can also be produced in pure nickel or can also be produced in pure nickel or nickel-resp. cupro-nickel-clad steel. nickel-resp. cupro-nickel-clad steel.
Equally, gold coloured parts are Equally, gold coloured parts are possible in brass-clad steel and reddish possible in brass-clad steel and reddish parts in copper-clad steel, with all parts in copper-clad steel, with all edges covered in each instance. Also, edges covered in each instance. Also, in order to achieve specific and unique in order to achieve specific and unique properties for vending machines, one or both components could be of the Magnimat type of sophisticated clad metal. The following working method is considered to represent optimal technology and economy, having its roots in the classical method of joining by rivetting.
Coins are reflections of history! The study of coins, also called numismatics, has been crucial in deciphering history. The study of ancient and medieval coinage have authenticated historical events known from literature, artifacts and archaeological findings. Indeed, the history of the Indian subcontinent and its coinage share the complexities as evident in presence of hundreds of dynasties and their attempt to issue distinct coinage over thousands of years. Paradoxically, this very facet made the study of Indian history and numismatics an interesting but challenging proposition. It is very difficult to know today where the concept of coinage first evolved, but based on available evidences, it appears that the concept of money (as coins, which by definition here would be a piece of metal of defined weight stamped with symbol of authority for financial transaction), was conceived by three different civilizations independently and almost simultaneously. It is beyond doubt that the first coins of India were minted just before 5th century BC in Madhyadesha i.e. central India. The earliest coins of India are commonly known as punch-marked coins. As the name suggests, these coins bear the symbols of various types, punched on pieces of silver of specific weight.
Most of the properties demanded of a coin must already be present in the initial coin blank when it is ready for striking. The very narrow tolerances in the chemical composition of previous metals must also be applied to coin blanks as a security against fraud. Moreover, the demand for minimum deviations from the legally established piece weight must be established, since only a uniform coin blanks volume ensures a smooth operation of automatic minting presses, whereas precious metals are still classified by weight to guarantee the required tolerance, the production of nonprecious metals on an industrial scale must exclusively rely on suitable production processes. Weight deviations of cut blanks are mainly dependent on the variation in the thickness of the final strip used to make the blank. Besides of the single piece-weight tolerance, the average weight deviation of a batch of coins plays a predominant role in transactions. Therefore, an even narrower mixed weight tolerance of, for instance, a lot of 300 pieces is regularly specified. During the final rolling operation of the coinage strip not only is it necessary to control variations within the strip, but it is also necessary to ensure consideration is given to the nominal weight tolerance to make sure the mixed lot tolerance is not exceeded.
The brass strips form a wide product range of 3C. They are produced in high quality for universal application to satisfy the strictest requirements of customers. The raw material for the manufacturing is a cast strip, made by modern continuous crystallization process. These strips have good cold-workability that makes possible intensive and easy blanking.Annealed materials can be easily deep-drawn. Fields of application are electronics, lighting technics, metal decoration material industry, vehicle industry, production of household items. Special hard grades are used as spring switch parts. The grades with homogenous structure are used for manufacturing components for refrigerating industry. The strips can be easily polished. After special heat treatment to control the grain size, the materials are suitable for multi-grade cold drawing of high level. Soft qualities can be delivered with pickled surface too. The excellent surface quality is guaranteed by the special technology (multi-step surface processing, bright annealing) developed by 3C. Good flatness and trueness to shape is characteristic for the material. for special request tensile levelling is increasing the trueness to shape under 1 mm thickness.
Today when we pay cash for goods and services we are probably not aware of more than Two Thousand year old history of coins.
The history of paper money is considerably shorter. Most probably,paper money was first produced in China paper money was first produced in China in 618-917 A.D., but in Europe the first banknotes were possibly not issued by the Stockholm Bank until 1661. The newly founded Bank of England issued banknotes in 1694 and the French State Bank sometime later. They were followed by numerous other slip banks, so called because of the issue of money slips.
For every day use, modern coinage is based on non-precious metals such as copper, nickel, zinc, iron and aluminium, with a preference being given to copper alloys.
Nickel Sliver Strips
E-Cu Copper Strip
Cu min .90:
Phosphorus Bronze Strips
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