MET 34800 - Engineering Materials Chapter 18 - IUPUI...

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MET 34800 – ENGINEERING MATERIALS IUPUI ENGINEERING TECHNOLOGY ENT Department
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CHAPTER 18 COPPER AND ITS ALLOYS Engineering Materials: properties and selection, 9th ed. Kenneth G. Budinski, Michael K. Budinski
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Upon completion of this chapter, the student should: have an understanding of the nature of copper and copper alloys, their metallurgy, and the products available have a knowledge of copper and copper alloy designation and properties have guidelines to aid in selection of copper and copper alloys for engineering design. CHAPTER GOALS Copper is traded internationally as a commodity metal, but it also has great importance as an engineering material. In fact, in its role as an electrical conductor, it may be the world’s most important metal. None of the electronics that we have would be possible without copper. Gold would do the job, but the supply is not adequate and the cost would make it prohibitive. 3
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Figure 18–1 An open-pit copper mine in Utah, in the United States. The black spots in the center of the photo are trucks, each carrying 300 tons of ore. INTRODUCTION 4
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Exists in metallic form in nature (like gold) Benefication steps Concentration Roasting Smelting Oxidation Electrorefining Copper leaves the mine as ETP copper 18.1 EXTRACTION OF COPPER FROM ORE 5
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Original ID = CDA numbers ASTM specification Current UNS system Temper designations Copper product forms 18.2 ALLOY DESIGNATION SYSTEM 6
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Table 18–1 A selection from ASTM B 601 temper designations or copper and copper alloys 18.2 ALLOY DESIGNATION SYSTEM 7
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Table 18–2 Nominal compositions of some wrought copper alloys 18.2 ALLOY DESIGNATION SYSTEM 8
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Table 18–3 Nominal compositions of some cast copper alloys 18.2 ALLOY DESIGNATION SYSTEM 9
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