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The recovery of copper (Cu) from secondary sources has received much attention because of its scarcity of natural resources. In this work, we estimated the input, in-use stock and discard of copper and copper alloy during 1950­2015 in global scale, and forecast them until 2050. In addition, we estimated the potential of scrap recovery for copper/copper alloys. It was estimated that the total amount of in-use stock of copper and copper alloy were 177,000 kt and 44,200 kt in 2015, respectively. The in-use stock, discard and input of copper in 2050 will reach 381,000­ 588,000 kt, 15,400­22,200 kt and 18,990­33,000 kt, respectively, whereas those for copper alloy will reach 77,500­134,000 kt, 3,020­4,680 kt and 3,760­7,200kt, respectively. The copper content in recoverable scraps of copper and copper alloy will reach 15,100­27,300 kt, and this accounts for 55.1­79.0% of copper content in annual input of copper and copper alloy in 2050. The range in forecast was caused by the difference in the saturation amount of in-use stock per capita and recovering rates of scraps. [doi:10.2320/matertrans.M2017399]

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Dynamic Material Flow Analysis and Forecast of Copper in Global-Scale: Considering the Difference of Recovery Potential between Copper and Copper Alloy