Steel Material for Machine Structural Use Reduced in Thermal Deformation
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United States of America Patent
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Issued Date -
Dec 26, 2013
app pub date -
Mar 16, 2012
filing date -
Mar 18, 2011
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Abstract
Disclosed is a steel material with small heat treatment deformation, comprising a machine structural steel used for components for power transmission, such as gears and shafts used in automobiles, industrial machines, and the like. The steel material comprises in mass %: C: 0.16 to 0.35%; Si: 0.10 to 1.50%; Mn: 0.10 to 1.20%; P: 0 to 0.030%; S: 0 to 0.030%; Cr: 1.3 to 2.5%; Cu: 0 to 0.30%; Al: 0.008 to 0.800%; O: 0 to 0.0030%; N: 0.0020 to 0.0300%; Ni: 0 to 3.00%; Mo: 0 to 0.50%; Ti: 0 to 0.200%; Nb: 0 to 0.20%; and the balance Fe and unavoidable impurities.
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