Aluminum alloy for producing semi-finished products or components for motor vehicles, method for producing an aluminium alloy strip from said aluminium alloy, and aluminium alloy strip and uses therefore

An aluminium alloy strip, produced by a method comprising the following method steps:

• Casting a rolling ingot from an aluminium alloy for producing semi-finished products or components for motor vehicles,
• wherein the alloying components of the aluminium alloy have the following contents in percent by weight:
• Fe≤0.80%,
• Si≤0.50%,
• 0.90%≤Mn≤1.50%,
• Mg≤0.25%
• Cu≤0.125%,
• Cr≤0.05%,
• Ti≤0.05%,
• V≤0.05%,
• Zr≤0.05%,
• the remainder being aluminium, unavoidable impurity elements individually <0.05%, in total <0.15%,
• and the combined content of Mg and Cu satisfies the following relation in percent by weight
• 0.15%≤Mg+Cu≤0.25%
• wherein the Mg content of the aluminium alloy is greater than the Cu content of the aluminium alloy;
• Homogenizing the rolling ingot at 480° C. to 600° C. for at least 0.5 h;
• Hot rolling the rolling ingot at 280° C. to 500° C. to form an aluminium alloy strip;
• Cold rolling the aluminium alloy strip to final thickness;
• and
• Subjecting the aluminium alloy strip to recrystallizing final annealing;
• wherein the aluminium alloy strip consists of an alloy having the following contents in percent by weight:
• Fe≤0.80%,
• Si≤0.50%,
• 0.90%≤Mn≤1.50%,
• Mg≤0.25%,
• Cu≤0.125%,
• Cr≤0.05%,
• Ti≤0.05%,
• V≤0.05%,
• Zr≤0.05%,
• the remainder being aluminium, unavoidable impurity elements individually <0.05%, in total <0.15%,
• and the combined content of Mg and Cu satisfies the following relation in percent by weight
• 0.15%≤Mg+Cu≤0.25%
• wherein the Mg content of the aluminium alloy is greater than the Cu content of the aluminium alloy, and
• wherein the aluminium strip has an offset yield strength Rp0.2 of at least 45 MPa, a uniform elongation Ag of at least 23%, and an elongation at break A80 mm of at least 30%.