Aluminum alloy sheet for can lid

Patent metadata

Field	Value
Publication number	US-2026085387-A1
Application number	US-202419111428-A
Country	US
Kind code	A1
Filing date	Apr 16, 2024
Priority date	Apr 17, 2023
Publication date	Mar 26, 2026
Grant date	—

Abstract

One aspect of the present disclosure is an aluminum alloy sheet for a can lid including a silicon (Si) content of 0.20 mass % or more and 0.47 mass % or less; an iron (Fe) content of 0.30 mass % or more and 0.70 mass % or less; a copper (Cu) content of 0.11 mass % or more and 0.40 mass % or less; a manganese (Mn) content of 0.70 mass % or more and 1.20 mass % or less; a magnesium (Mg) content of 1.1 mass % or more and 3.7 mass % or less; and a balance consisting of or including aluminum (Al) and inevitable impurities. The aluminum alloy sheet has a solidus temperature higher than a solid solutionizing temperature of Mg2Si.

First claim

1 . An aluminum alloy sheet for a can lid, the aluminum alloy sheet comprising:
a silicon (Si) content of 0.20 mass % or more and 0.47 mass % or less; an iron (Fe) content of 0.30 mass % or more and 0.70 mass % or less; a copper (Cu) content of 0.11 mass % or more and 0.40 mass % or less; a manganese (Mn) content of 0.70 mass % or more and 1.20 mass % or less; a magnesium (Mg) content of 1.1 mass % or more and 3.7 mass % or less; and a balance consisting of or comprising aluminum (Al) and inevitable impurities, wherein the aluminum alloy sheet has a solidus temperature higher than a solid solutionizing temperature of Mg 2 Si.

2 . The aluminum alloy sheet for a can lid according to claim 1 ,
wherein the aluminum alloy sheet comprising:
a silicon (Si) content of 0.20 mass % or more and 0.47 mass % or less;
an iron (Fe) content of 0.30 mass % or more and 0.59 mass % or less;
a copper (Cu) content of 0.11 mass % or more and 0.40 mass % or less;
a manganese (Mn) content of 0.70 mass % or more and 0.98 mass % or less; and
a magnesium (Mg) content or 1.1 mass % or more and 3.3 mass % or less,
wherein a solidification initiating temperature of Al is higher than a crystallization temperature of a primary crystal.

3 . The aluminum alloy sheet for a can lid according to claim 2 ,
wherein the aluminum alloy sheet comprising:
a silicon (Si) content of 0.20 mass % or more and 0.39 mass % or less;
an iron (Fe) content of 0.30 mass % or more and 0.59 mass % or less;
a copper (Cu) content of 0.11 mass % or more and 0.40 mass % or less;
a manganese (Mn) content of 0.70 mass % or more and 0.98 mass % or less; and
a magnesium (Mg) content of 1.1 mass % or more and 3.1 mass % or less,
wherein a difference in temperature obtained by deducting a solid solutionizing temperature of Mg 2 Si from a solidus temperature is 30° C. or more.

4 . The aluminum alloy sheet for a can lid according to claim 3 ,
wherein the aluminum alloy sheet comprising:
a silicon (Si) content of 0.20 mass % or more and 0.39 mass % or less;
an iron (Fe) content of 0.30 mass % or more and 0.51 mass % or less;
a copper (Cu) content of 0.11 mass % or more and 0.40 mass % or less;
a manganese (Mn) content of 0.70 mass % or more and 0.92 mass % or less; and
a magnesium (Mg) content of 1.1 mass % or more and 2.9 mass % or less,
wherein a difference in temperature obtained by deducting a crystallization temperature of a primary crystal from a solidification initiating temperature of Al is 1° C. or more.

Assignees

• Uacj Corp

Inventors

• Sato Yusuke
• Ezaki Tomotaro
• Kudo Tomoyuki
• Tazoe Kiyonari

Classifications

• C22F1/047

  of alloys with magnesium as the next major constituent · CPC title

• C22C21/06

  with magnesium as the next major constituent · CPC title

• C22F1/00

  Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working (apparatus for mechanical working of metal B21, B23, B24) · CPC title

• C22C21/08 Primary

  with silicon · CPC title