Aluminum alloy for magnetic disc substrate execellent in platabi

Details Aluminum alloy for magnetic disc substrate execellent in platabi Aluminum alloy for magnetic disc substrate execellent in platabi

1989-09-26

1991-05-21

Dean, R.

Alloys or metallic compositions

Aluminum base

Copper containing

148439, C22C 2106

Patent

active

050173375

ABSTRACT:
An aluminum alloy for magnetic disc substrate excellent in platability is disclosed, which is characterized in that not less than 0.010 wt. % and under 0.03 wt. % of Cu, not less than 2 wt. % and not more than 6 wt. % of Mg and not less than 0.05 wt. % and not more than 2.0 wt. % of Zn are contained, further one or more of over 0.01 wt. % and under 0.05 wt. % of Mn and over 0.01 wt. % and under 0.05 wt. % of Cr are contained, and, as impurity elements, Si, Fe, Ti and other individual unavoidable element are regulated to be not more than 0.1 wt. %, not more than 0.1 wt. %, not more than 0.02 wt. % and not more than 0.02 wt. %, respectively. Zr may be contained additionally in amounts of not less than 0.005 wt. % and under 0.05 wt. %.

REFERENCES:
patent: 4431461 (1984-02-01), Hoshino et al.

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