| 摘要 |
PROBLEM TO BE SOLVED: To provide an aluminum alloy material which has excellent brightness and stress corrosion cracking resistance without requiring high purification, further has higher strength, and is suitable to a wheel for a vehicle. SOLUTION: The aluminum alloy material has a composition comprising, by mass, 2.5 to 4.5% Mg, 0.31 to 0.45% Cr and 0.02 to 0.15% Cu, and the balance Al with inevitable impurities in which the content of Fe is limited to ≤0.06% and the content of Si is limited to ≤0.10%, and whose tensile strength can be controlled to ≥210 MPa, thus, e.g., an expanded material for a wheel which has excellent brightness, and further has higher strength and corrosion resistance can be provided. Further, since excellent brightness can be obtained without requiring high purity metal charge, low cost production is possible. COPYRIGHT: (C)2010,JPO&INPIT |
