Patent ID: 8227088
Filing Date: 2012-07-24
Classification: B21D,Y10T

Abstract:
1. A metallic cover, comprising: a bottom base; a plurality of side walls extending from bottom base, the bottom base and each of the side walls connected by an edge structure; wherein the metallic cover is made of a metallic material that has a yield strength in a range from about 80 MPa to about 150 MPa, an elongation ratio in a range from about 15% to about 28%, and a hardness in the range from about 45 HV0.2 to about 70 HV0.2; wherein the metallic cover is made of an aluminum alloy sheet having an inner structure including two regular portions and a sensitive portion sandwiched between the two regular portions, a width-thickness ratio of the sensitive portion is 0<W/t<0.33, wherein W represents a width of the sensitive portion, and t represents a thickness of the aluminum alloy sheet.