MMK Develops Coin Metal Technology
10 May 2012 (11:30)
Magnitogorsk Iron & Steel Works (MMK) developed a technology for the production of coin metal with unique properties, the company’s PR Department reports.
‘Experts from Russia’s largest coin-making enterprise GURT sent their technical specifications for the metal meant for ten-ruble coins out to Russia’s leading metallurgical enterprises in 2009. Ensuring the low surface roughness, precise thickness, and a limited hardness range all at the same time was not easy, but our metallurgists managed to do this. A special technology was elaborated at MMK’s Central Control Lab that made it possible to start producing a metal strip with the needed characteristics. The pilot batch was shipped to the customer in the second half of 2009 and was approved shortly thereafter,’ the company reports.
MMK currently delivers 1,200 tons of metal to GURT every month; this metal is then used for making coins and fully meets the enterprise’s needs for this kind of produce. Exactly 50% of the monthly shipments (600 tons) is used for making ten-ruble coins.
‘The difficulty lay in the need to find the necessary chemical composition and to select the cold- and hot-rolling modes as well as the thermal treatment mode, since the required combination of properties was very complicated. The metal properties affect the amount of nickel used for making coins and the lifespan of the costly machinery that is used for coining the final product. It took us and the workers from sheet-rolling shop 8 a few months to find the best formula, and the solution to the problem was found. I’d like to say a special thanks to my co-workers from the rolling shop: they worked overtime, often without weekends, but they managed to meet the challenge,’ says Central Control Lab’s leading engineer and one of the people behind the unique metal Vyacheslav Telegin.
MMK now offers metal strips with four different kinds of thickness: 1.16mm one for one-ruble coins, 1.52mm one for making two-ruble coins, 1.56mm one for five-ruble coins, and 1.84mm for ten-ruble ones. All of these coins are now made from MMK-supplied metal.
‘Experts from Russia’s largest coin-making enterprise GURT sent their technical specifications for the metal meant for ten-ruble coins out to Russia’s leading metallurgical enterprises in 2009. Ensuring the low surface roughness, precise thickness, and a limited hardness range all at the same time was not easy, but our metallurgists managed to do this. A special technology was elaborated at MMK’s Central Control Lab that made it possible to start producing a metal strip with the needed characteristics. The pilot batch was shipped to the customer in the second half of 2009 and was approved shortly thereafter,’ the company reports.
MMK currently delivers 1,200 tons of metal to GURT every month; this metal is then used for making coins and fully meets the enterprise’s needs for this kind of produce. Exactly 50% of the monthly shipments (600 tons) is used for making ten-ruble coins.
‘The difficulty lay in the need to find the necessary chemical composition and to select the cold- and hot-rolling modes as well as the thermal treatment mode, since the required combination of properties was very complicated. The metal properties affect the amount of nickel used for making coins and the lifespan of the costly machinery that is used for coining the final product. It took us and the workers from sheet-rolling shop 8 a few months to find the best formula, and the solution to the problem was found. I’d like to say a special thanks to my co-workers from the rolling shop: they worked overtime, often without weekends, but they managed to meet the challenge,’ says Central Control Lab’s leading engineer and one of the people behind the unique metal Vyacheslav Telegin.
MMK now offers metal strips with four different kinds of thickness: 1.16mm one for one-ruble coins, 1.52mm one for making two-ruble coins, 1.56mm one for five-ruble coins, and 1.84mm for ten-ruble ones. All of these coins are now made from MMK-supplied metal.
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