WE LIVE COPPER MKM MANSFELDER KUPFER UND MESSING GMBH

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1 Flat bars MKM supplies flat bars from 20 x 2 mm to a maximum width of 210 mm and thickness of 20 mm, thus covering the entire range in this segment. Besides offering the full assortment of standard dimensions, we also provide a wide variety of intermediate sizes. The flat bars can be manufactured with rounded or square edges as well as with half-round sides. Our flat bars are chiefly used in switchgear construction in the area of low and medium voltage but also for power distribution systems (bus bars), transformers, a wide variety of electrical components, and for electromechanical engineering applications. Depending on the specifications and the wishes of the customer, we can also supply our bars with reduced hardness levels compared with the standard specifications. MKM flat bars have excellent flexural properties and are therefore suitable for a wide variety of uses. The major standard sizes can be supplied ex stock if required urgently. We also provide flat bars as tin-coated versions to serve the needs of our customers even better. Flat bars mm Thickness from 2 to 50 mm Width from 10 to 210 mm / / /260 Flat bars with rounded and square edges as well as with half-round sides Other dimensions available on request

2 ound bars / square bars MKM supplies round bars in sizes from 6 mm to 165 mm for a wide range of electrotechnical applications. Besides the primary material ETP, we are also increasingly supplying customers with OF and OFE bars for high-quality requirements, such as in vacuum technology. Copper bars can be manufactured up to 152 mm in diameter as a drawn version with a very good surface and restricted tolerances and in hardnesses and strengths according to customer specifications. Thanks to the high MKM copper quality and a special alloy known as V-Copper as well as a straightness of 1 mm/m, our round bars are suitable for machining on modern high-performance automatic lathes. ound bars for lathe shops can also be supplied with chamfered ends on request. By performing a separate eddy current test, it is possible to guarantee a faultless surface for special requirements. Furthermore, we supply CuSP (sulphur copper) bars with particularly good machining characteristics. Thanks to the quality of the material, MKM copper bars are perfect for customers wishing to perform special technological processing, like cold extrusion. Besides drawn bars, MKM also supplies a large assortment of extruded bars for the hot stamping (forging) of copper workpieces. Square bars which can be supplied as drawn versions up to 100 mm square as well as hexagonal bars complete our range. Diameter/edge lengths in mm Square pressed Square drawn ound pressed ound drawn Other hardnesses and strengths are available on request

3 Profiles MKM is increasingly developing into a supplier of profiles in particular sophisticated profiles manufactured according to drawings. The profiles can be supplied as extruded or drawn versions up to a maximum cross sectional area of 10,000 square millimetres. With this supply of special profiles, our customers can find efficient tailored solutions for their products and achieve material savings. When it comes to manufacturing complex profiles from drawings, we are able to draw on our many years of expertise plus our own tool production facilities with modern wire eroding equipment. Our technicians look forward to advising you personally in order to work out the appropriate delivery specifications.

4 Cu materials /alloys European standard DIN standard (old) ASTM Typical properties/ applications Cu-ETP CW004A E-Cu 58 E-Cu C11000 Standard alloy for electrical components, main application in switchgear construction Manufacturing standard Cu-HCP Cu-PHC CW021A CW020A SE-Cu C10300 Hydrogen resistant, very high conductivity, good weldability Cu-OF CW008A OF-Cu C10200 Hydrogen resistant, very high conductivity, very good weldability Cu-OFE CW009A C10100 High purity, Cu % for vacuum switchgears, semiconductors, electron tubes CuAg0.10 CW013A CuAg C11600 For electric motors/ propulsion technology CuAg0.10P CW016A CuAg0.1P C11700 Main alloy for the construction of generators/ propulsion technology Cu-DHP CW024A SF-Cu C12200 Very good weldability, without any particular conductivity requirements CuSP CW114C CuSP C14700 Good machining charac teristics; usage as work pieces for turning on automatic lathes, for contact parts, and for welding nozzles DIN EN DIN EN DIN EN We can also supply further CuAg materials, such as CuAg0.2, CuAg0.03, and CuAg0.04. Supply according to other international standards, such as JIS or GOST, is possible by arrangement.

5 Contact: MKM Mansfelder Kupfer und Messing GmbH Lichtlöcherberg 40 D Hettstedt Germany Phone: +49 (0) Fax: +49 (0) September 2010