Methods of off-line heat treatment of non-ferrous alloy feedstock

A method comprising:

• preparing a coil of a non-ferrous alloy strip as feedstock, the preparing consisting of:
• (a) continuously casting the non-ferrous alloy strip,
• (b) passing the non-ferrous alloy strip through one or more shear and trim stations,
• (c) optionally quenching the non-ferrous alloy strip for temperature adjustment,
• (d) when step (c) is present, after step (c), hot rolling the non-ferrous alloy strip, when step (c) is not present, after step (b), hot rolling the non-ferrous alloy strip,
• (e) optionally cold rolling the non-ferrous alloy strip,
• (f) trimming the non-ferrous alloy strip, and
• (g) coiling the non-ferrous alloy strip, thereby containing the coil of the non-ferrous alloy strip as the feedstock;
• uncoiling the coil of the feedstock;
• heating the feedstock to a temperature between a recrystallization temperature of the non-ferrous alloy and 10 degrees Fahrenheit below a solidus temperature of the non-ferrous alloy for a heating duration of 0.5 to 55 seconds in an induction furnace including one or more induction heaters configured for transverse flux induction heating;
• and
• quenching the feedstock to form a heat-treated product having a temper;
• wherein the temper is a T4 or T4X temper;
• and
• wherein the non-ferrous alloy strip excludes aluminum alloys having all of the following:
• 0.4 weight percent silicon,
• less than 0.2 weight percent iron,
• 0.35 to 0.40 weight percent copper,
• 0.9 weight percent manganese, and
• 1 weight percent magnesium.