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US 5,690,753 AGranted
Steel containing super-finely dispersed oxide system inclusions
AssigneeNippon Steel Corporation
InventorsYuji Kawauchi, Hirobumi Maede, deceased
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Abstract
A carbon steel containing super-finely dispersed oxide system inclusions, comprising, by weight, not more than 1.2% carbon, 0.01 to 0.10% Al, total oxygen of not more than 0.0050%, Mg which fulfills the relationship of the following formula: (total oxygen wt %.times.0.5).ltoreq.total Mg wt %<(total oxygen wt %.times.7.0) and Mg oxides comprising MgO.multidot.Al.sub.2 O.sub.3 and free MgO.
Claims3
A carbon steel containing super-finely dispersed oxide system inclusions, comprising, by weight,
- not more than 1.2% carbon,
- 0.01 to 0.10% Al,
- total oxygen of not more than 0.0050%,
- Mg which fulfills the relationship of the following formula:
- (total oxygen wt %.times.0.5).ltoreq.total Mg wt %<(total oxygen wt %.times.7.0)
- and Mg oxides containing MgO.multidot.Al.sub.2 O.sub.3 and free MgO.
3 more elements
Dependencies are inferred from the claim text.