Aluminum alloy sheet for beverage can body

Abstract

An aluminum alloy sheet for a beverage can body has a composition including 0.10 mass % or more and 0.70 mass % of Si; 0.10 mass % or more and 0.80 mass % or less of Fe; 0.10 mass % or more and 0.30 mass % or less of Cu; 0.50 mass % or more and 1.50 mass % or less of Mn; 1.00 mass % or more and 1.50 mass % or less of Mg, and a balance including Al and inevitable impurities. An n-value in an equivalent plastic strain range of 0.01 to 0.03 is 0.049 or greater. An n-value in an equivalent plastic strain range of 0.3 to 1.1 is 0.063 or less.

1 . An aluminum alloy sheet for a beverage can body, the aluminum alloy sheet being made of an aluminum alloy comprising Si: 0.10 mass % or more and 0.70 mass % or less, Fe: 0.10 mass % or more and 0.80 mass % or less, Cu: 0.10 mass % or more and 0.30 mass % or less, Mn: 0.50 mass % or more and 1.50 mass % or less, Mg: 1.20 mass % or more and 1.50 mass % or less, and a balance comprising Al and inevitable impurities, and the aluminum alloy sheet comprising:
 an n-value of 0.049 or greater in an equivalent plastic strain range of 0.01 to 0.03; and   an n-value of 0.063 or less in an equivalent plastic strain range of 0.3 to 1.1.   
     
     
         2 . An aluminum alloy sheet for a beverage can body, the aluminum alloy sheet being made of an aluminum alloy comprising Si: 0.10 mass % or more and 0.70 mass % or less, Fe: 0.10 mass % or more and 0.80 mass % or less, Cu: 0.10 mass % or more and 0.30 mass % or less, Mn: 0.50 mass % or more and 1.50 mass % or less, Mg: 1.20 mass % or more and 1.50 mass % or less, and a balance comprising Al and inevitable impurities, and the aluminum alloy sheet comprising:
 a tensile strength of 315 MPa or greater and 350 MPa or less;   an n-value of 0.049 or greater in an equivalent plastic strain range of 0.01 to 0.03; and   an n-value of 0.063 or less in an equivalent plastic strain range of 0.3 to 1.1.   
     
     
         3 . An aluminum alloy sheet for a beverage can body, the aluminum alloy sheet being made of an aluminum alloy comprising Si: 0.10 mass % or more and 0.70 mass % or less, Fe: 0.10 mass % or more and 0.80 mass % or less, Cu: 0.10 mass % or more and 0.30 mass % or less, Mn: 0.50 mass % or more and 1.50 mass % or less, Mg: 1.20 mass % or more and 1.50 mass % or less, and a balance comprising Al and inevitable impurities, and the aluminum alloy sheet comprising:
 an n-value of 0.049 or greater in an equivalent plastic strain range of 0.01 to 0.03;   an n-value of 0.063 or less in an equivalent plastic strain range of 0.3 to 1.1; and   a Mg solid solution content of 1.20 mass % or more that is calculated from a specific resistance difference between the aluminum alloy sheet for a beverage can body after a rolling with an equivalent plastic strain of 0.3 to 1.1 and a hot-rolled aluminum alloy sheet cooled immediately after a hot finishing rolling.   
     
     
         4 . An aluminum alloy sheet for a beverage can body, the aluminum alloy sheet being made of an aluminum alloy comprising Si: 0.10 mass % or more and 0.70 mass % or less, Fe: 0.10 mass % or more and 0.80 mass % or less, Cu: 0.10 mass % or more and 0.30 mass % or less, Mn: 0.50 mass % or more and 1.50 mass % or less, Mg: 1.20 mass % or more and 1.50 mass % or less, and a balance comprising Al and inevitable impurities, and the aluminum alloy sheet comprising:
 a tensile strength of 315 MPa or greater and 350 MPa or less;   an n-value of 0.049 or greater in an equivalent plastic strain range of 0.01 to 0.03;   an n-value of 0.063 or less in an equivalent plastic strain range of 0.3 to 1.1;   a Mg solid solution content of 0.96 mass % or more that is calculated from a specific resistance difference between the aluminum alloy sheet for a beverage can body and a hot-rolled aluminum alloy sheet cooled immediately after a hot finishing rolling; and   a Mg solid solution content of 1.20 mass % or more that is calculated from a specific resistance difference between the aluminum alloy sheet for a beverage can body after a rolling with an equivalent plastic strain of 0.3 to 1.1 and a hot-rolled aluminum alloy sheet cooled immediately after a hot finishing rolling.