Low density and high ductility alloy steel for a golf club head
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United States of America Patent
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Sep 9, 2003
Grant Date -
Apr 24, 2003
app pub date -
Oct 19, 2001
filing date -
Oct 19, 2001
priority date (Note) -
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Abstract
An alloy for golf club head include by weight 25 to 31 wt % manganese, 6.3 to 7.8 wt % aluminum, 0.65 to 0.85 wt % carbon and 5.5 to 9.0 wt % chromium, and the balance being iron. Additions of 0.8 to 1.5 wt % silicon, 2.0 to 5.0 wt % titanium, or 0.5 to 1.0 wt % molybdenum are optionally included in the alloy. Due to the chromium, titanium and molybdenum, the alloy has a good resistance to corrosion, a good finished surface quality after being forged at a temperature from 800.degree. C. to 1050.degree. C. A combination of high ductility and high tensile strength is achieved after the alloy has been treated at a temperature from 980.degree. C. to 1080.degree. C. for 1 to 24 hours.
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