Spheroidal graphite cast iron
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United States of America Patent
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Nov 21, 2017
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app pub date -
May 26, 2014
filing date -
Jun 28, 2013
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Abstract
A spheroidal graphite cast iron comprising: C: 3.3 to 4.0 mass %, Si: 2.1 to 2.7 mass %, Mn: 0.20 to 0.50 mass %, S: 0.005 to 0.030 mass %, Cu: 0.20 to 0.50 mass %, Mg: 0.03 to 0.06 mass % and the balance: Fe and inevitable impurities, wherein a tensile strength is 550 MPa or more, and an elongation is 12% or more.
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