SPRING STEEL, SPRING, AND MANUFACTURING METHOD OF SPRING
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United States of America Patent
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May 5, 2016
app pub date -
May 8, 2014
filing date -
Jun 4, 2013
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A spring steel contains, in terms of mass %, C: 0.35% or more and 0.55% or less, Si: 1.60% or more and 3.00% or less, Mn: 0.20% or more and 1.00% or less, Cr: 0.10% or more and 1.50% or less, Ni: 0.05% or more and 0.30% or less, and Cu: 0.05% or more and 1.00% or less, and substantially does not contain V, the remainder being Fe and unavoidable impurities.
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