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GRAY IRON VS. DUCTILE IRON


production increase vs. 41% from 2009 to 2010, and Taiwan coming in at 11% vs. 42% from 2009 to 2010. The U.S. narrowly overtook


India on this year’s top 10 list, regaining the 2nd


spot, while the Top 5 Producers of Iron Castings


Globally, 47% of castings produced are gray iron, compared to 25% produced in ductile iron. But this type of disparity is not present in every country. Denmark, Finland, France, Norway, Portugal, Slovokia, the U.K. and the U.S. produce more ductile iron than gray iron.


115,568 metric tons) and the U.S. (21.5%, an additional 1,769,767 metric tons). Growth in countries


that showed the largest gains in 2010 has slowed but not stopped, with Brazil reporting a 3% casting


remaining cast metal producing country rankings are the same. China is number one, having pro- duced 41.3 million metric tons in 2011. The U.S. produced 10 mil- lion metric tons, followed closely by India at 9.9 million metric tons. Japan closely surpassed Germany with 5.47 metric tons. Russia, Brazil, Korea, Italy and France occupy spots six through 10 on the list. The top 10 nations produced 88% of the total global castings, as in 2009 and 2010. Production per plant is another


area where gains in the U.S. are showing, at 24.5% vs. 2010 (4,979 metric tons per plant). Germany’s productivity increased significantly, also, at 14.4%. Germany remains the most productive country at 8,933 metric tons per plant. Asia suffered a dip in productivity, with China down 9.7% and Japan drop- ping 12%. Productivity is calcu- lated as total tonnage divided by the number of plants reported. Gray iron continues to comprise 47% of the world’s ferrous metal castings vs. 25% ductile iron and 10% steel. Of the nonferrous met- als, aluminum takes the lion’s share at 13% of the global total. Nonfer- rous castings overall increased by more than 1 million tons. The data reported in the 46th Census of World Casting Produc- tion is supplied by each nation’s metalcasting association or similar representatives. Countries that did not participate this year were Croatia, Mexico, Mongolia and the Ukraine. These countries remain listed according to the last year they participated. Slovakia has returned to the list,


this year, producing 71,000 metric tons. Its metalcasting output has increased 56% since 2008, with the majority of its tonnage in aluminum (46,000 metric tons). Its


38 | METAL CASTING DESIGN & PURCHASING | Jan/Feb 2013


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