Abstract: A method for producing an aluminium alloy extrusion, consisting of an alloy with the composition ?0.30% by weight of silicon, ?0.40% by weight of iron, 0.01-1.1% by weight of manganese, ?0.30% by weight of magnesium, ?0.70% by weight of zinc, ?0.35% by weight of chromium, ?0.20% by weight of zirconium, ?0.25% by weight of titanium, ?0.20% by weight vanadium, ?0.10% by weight of copper, up to 0.15% by weight of other impurities, each not greater than 0.03% by weight and the balance aluminium, the method comprising the steps casting the molten metal into extrusion billet a) subjecting the billet to a homogenization treatment at a holding temperature of 550 to 620° C. for 6 to 10 hours b) heating the billet to a temperature of 400 to 550° C. c) extruding the billet to a tube.

Abstract: A method for producing a corrosion resistant aluminum alloy extrusion. The method includes providing molten alloy with a composition comprising ?0.30, % by weight of silicon, ?0.40, % by weight of iron, 0.01-0.6% manganese, ?0.30, % magnesium, ?0.70, % zinc, 0.05-0.35% chromium, 0.02-0.20% zirconium, ?0.25% titanium, ?0.20% vanadium, ?0.10% copper, up to 0.15% by weight of other impurities, each not greater than 0.03% by weight, and the balance aluminum. The method includes casting the alloy into an extrusion billet, subjecting the billet to a homogenization treatment at a holding temperature of 550 to 620 deg.C for 6 to 10 hours, heating the billet to a temperature of 400 to 550 deg.C, and extruding the billet to a tube.

Abstract: The invention relates to a method for producing a corrosion resistant aluminium alloy extrusion, consisting of an alloy with the composition ?0.30, preferably 0.05 - 0.15 % by weight of silicon, ?0.40, preferably 0.06 - 0.35 % by weight of iron, 0.01 -1.1 % by weight of manganese, ?0.30, preferably 0.15 - 0.30 % by weight of magnesium, ?0.70, preferably 0.05 - 0.70 % by weight of zinc, ?0.35, preferably 0.25 % by weight of chromium, ?0.20 % by weight of zirconium, ?0.25, preferably 0.05-0.25% by weight of titanium, ?0.20% by weight vanadium ?0.10 % by weight of copper up to 0.15 % by weight of other impurities, each not greater than 0.03 % by weight and the balance aluminium, the method comprising the steps casting the molten metal into extrusion billet a) subjecting the billet to a homogenization treatment at a holding temperature of 550 to 620 deg.C for 6 to 10 hours b) heating the billet to a temperature of 400 to 550 deg.C c) extruding the billet to a tube.

Abstract: An aluminium alloy including 1.0-1.5 wt % Mn, up to 0.1 wt % Mg, up to 0.3 wt % Si, up to 0.3 wt % Fe, up to 0.1 wt % Cu, up to 0.25 wt % Cr, up to 0.1 wt % Ni, up to 0.3 wt % Zn, up to 0.1% Ti, up to 0.2 Zr. The allow also includes impurities, each no more than 0.05 wt. % and wherein the total of impurities is no more than 0.15 wt. %, with the balance being aluminum.