Pressed product

Abstract

The invention offers a pressed product (F) produced by press-forming a metal plate ( 1 ). The pressed product (F) has a peripheral surface that has a corner portion ( 12 ) connecting two surfaces in the peripheral surface. The corner portion ( 12 ) has an outside corner radius R that is equal to or smaller than the thickness “t” of the metal plate ( 1 ). That is, the pressed product (F) has the sharp corner portion ( 12 ).

1 - 9 . (canceled) 
     
     
         10 . A pressed product, being produced by press-forming a metal plate;
 the pressed product having a peripheral surface that has a corner portion connecting two surfaces in the peripheral surface;
 the corner portion having an outside corner radius R satisfying the condition that R is equal to or smaller than (⅔)×t, where “t” is the thickness of the metal plate; 
 the pressed product being formed by using a material comprising 8.3 mass % or more and 9.5 mass % or less Al, 0.5 mass % or more and 1.5 mass % or less Zn, and the remainder that comprises Mg and impurities; 
   wherein:
 (a) the outside corner radius R is 0.2 mm or more and 0.4 mm or less; 
 (b) the thickness “t” is 0.4 mm or more and 0.8 mm or less; and 
 (c) the corner portion has a hardness of 90 Hv or more. 
   
     
     
         11 . The pressed product as defined by  claim 10 ; the pressed product being to be used for a housing of a portable electronic device;
 wherein:
 (a) the outside corner radius R satisfies the condition that R is equal to or smaller than (½)×t; 
 (b) the thickness “t” is 0.4 mm or more and 0.6 mm or less; and 
 (c) the corner portion has a hardness of 95 Hv or more. 
   
     
     
         12 . The pressed product as defined by  claim 10 , wherein the corner portion has a hardness higher than that of the portion other than the corner portion. 
     
     
         13 . The pressed product as defined by  claim 11 , wherein the corner portion has a hardness higher than that of the portion other than the corner portion. 
     
     
         15 . The pressed product as defined by  claim 10 , wherein the corner portion has an inside corner radius “r” that is practically 0 mm. 
     
     
         16 . The pressed product as defined by  claim 11 , wherein the corner portion has an inside corner radius “r” that is practically 0 mm. 
     
     
         17 . The pressed product as defined by  claim 12 , wherein the corner portion has an inside corner radius “r” that is practically 0 mm.