Aluminum alloy and fastener member

• US 11,279,990 B2
• Filed: 02/16/2017
• Issued: 03/22/2022
• Est. Priority Date: 02/19/2016
• Status: Active Grant

• Current Assignee: NHK Spring Company Limited, Topura Co., Ltd. (NHK Spring Company Limited)
• Original Assignee: NHK Spring Company Limited
• Inventors: Kaneda, Noriyoshi, Suzuki, Takeshi, Miyamoto, Kouhei, Horiuchi, Naoki
• Primary Examiner(s): Wyszomierski, George
• Assistant Examiner(s): Morillo, Janell C
• Application Number:
  US15/999,785
• Publication Number:
  US 20190316230A1
• Time in Patent Office: 1,860 Days
• CPC Class Codes: C22C 21/00 Alloys based on aluminium
• CPC Class Codes: C22C 21/02 with silicon as the next major constituent
• CPC Class Codes: C22C 21/06 with magnesium as the next major constituent
• CPC Class Codes: C22C 21/12 with copper as the next major constituent
• CPC Class Codes: C22C 21/14 with silicon
• CPC Class Codes: C22C 21/16 with magnesium
• CPC Class Codes: C22C 21/18 with zinc
• CPC Class Codes: C22F 1/04 of aluminium or alloys based thereon
• CPC Class Codes: C22F 1/043 of alloys with silicon as the next major constituent
• CPC Class Codes: C22F 1/057 of alloys with copper as the next major constituent
• CPC Class Codes: F16B 19/06 Solid rivets made in one piece
• CPC Class Codes: F16B 35/00 Screw-bolts; Stay-bolts; Screw-threaded studs; Screws; Set screws F16B33/008 takes precedence; joining sheets or plates using screws with two separate threads F16B5/0275; using screws with adjustment sleeves F16B5/0283; thread cutting screws F16B25/00
• CPC Class Codes: F16B 37/00 Nuts or like thread-engaging members specially shaped for rotations by a tool F16B23/00

Abstract

An aluminum alloy contains 0.7% to 1.8% of silicon, 0.5% to 2.1% of copper, 0.4% to 1.8% of manganese, 0.6% to 1.6% of magnesium, and 0.1% to 0.7% of zinc in terms of mass ratio and the balance aluminum with inevitable impurities.

Claims

1. A fastening member fastening a plurality of members together, wherein the fastening member is made of an aluminum alloy comprising, in terms of mass ratio:

0.7% to 1.8% of silicon;

1.5% to 2.1% of copper;

0.4% to 1.8% of manganese;

0.6% to 1.6% of magnesium;

0.1% to 0.7% of zinc

0.16% to 0.3% of titanium; and

the balance aluminum with inevitable impurities, and

wherein the fastening member has a tensile strength of 496 MPa or higher.

2. The fastening member according to claim 1, wherein the manganese is contained in an amount of 1.2% to 1.8% in terms of mass ratio.

3. The fastening member according to claim 1, wherein

the silicon is contained in an amount of 1.4% to 1.8% in terms of mass ratio, and

the magnesium is contained in an amount of 1.2% to 1.6% in terms of mass ratio.

4. The fastening member according to claim 1, comprising, in terms of mass ratio:

1.4% to 1.8% of the silicon;

1.5% to 2.1% of the copper;

1.2% to 1.8% of the manganese;

1.2% to 1.6% of the magnesium;

0.1% to 0.7% of the zinc; and

0.16% to 0.19% of the titanium.

5. The fastening member according to claim 1, further comprising at least one selected from the group consisting of, in terms of mass ratio:

0.05% to 0.15% of nickel;

0.05% to 0.15% of cobalt.