Abstract: A method of casting a multi-layered metal ingot including the steps of delivering a metallic divider member into a direct chill mold, pouring a first molten metal into the mold on one side of the divider member, and pouring a second molten metal into the mold on the other side of the divider member, and allowing the first molten metal and the second molten metal solidify to form a metal ingot which includes the divider metal layer disposed there between.

Abstract: The present invention relates to the process used to fabricate a multiple layer aluminum brazing sheet having a core, a braze cladding, and an interliner therebetween that, when fabricated in the fully annealed condition (O-temper), forms a continuous and dense dispersoid band in the core in addition to having an additional sacrificial layer for exceptional post brazed corrosion resistance.

Abstract: A heat exchanger tube having enhanced corrosion resistance and improved resistance to high burst pressures. The heat exchanger tube comprises an aluminum alloy that consists essentially of about 0.01-1.5% silicon, up to about 1.2% copper, up to about 2.0% manganese, about 0.01-1.0% iron, about 0.01-5.0% zinc, up to about 0.02% titanium and the balance substantially aluminum and incidental elements and impurities.

Abstract: A metallurgical product consists essentially of a core aluminum alloy, purposefully tailored through chemistry and processing route to resist recrystallization during the brazing cycle to intentionally exploit the higher strengths immediately after brazing of a deformed and recovered microstructure, the core aluminum alloy being bonded on one side to an aluminum alloy interliner designed to be resistant to localized erosion, which, in turn, is bonded to a 4xxx calling alloy.

Abstract: A process for making aluminum alloy finstock having improved combinations of post-braze tensile strength, electrical conductivity and self-corrosion resistance. The process includes continuously casting into sheet an alloy composition. The composition includes about 0.35-0.50 wt. % Si, about 1.8-2.6 wt. % Fe, about 0.02-0.30 wt. % Cu, about 0.40-0.70 wt. % Mn, up to about 3.0 wt. % Zn, up to about 0.05 wt. % In; up to about 0.05 wt. % Ti and up to about 0.2 wt. % Zr, the balance aluminum, incidental elements and impurities. The casting including a solidification rate of greater than about 200° C./sec. The sheet is then rolled to an intermediate anneal gauge and then annealed. The sheet is then cold rolled to a desired final gauge.

Abstract: A high-strength aluminum alloy tubestock is for heat exchangers. The tubestock includes a core with low to moderate Si content to promote strengthening without excessively compromising corrosion resistance. A braze liner on the core exterior employs a Zn+Mg+Si water-side liner that will not experience undesirable melting during brazing. The water-side liner preferably comprises between about 0.2-0.5% Si, between about 2.5-5.0% Zn, between about 1.3-2.5% Mg, less than about 0.1% Cu, less than about 0.35% Fe and less than about 0.25% Mn, with the remainder comprising Al and tolerable impurities. The core preferably comprises between about 0.5-1.3% Mn, between about 0.1-0.3 Mg, between about 0.4-0.7% Cu, between about 0.15-0.5% Si, between about 0.01-0.25% Ti and less than about 0.5% Fe, with the remainder comprising Al and tolerable impurities. The braze liner preferably comprises an Al—Si-base alloy. A tubular member made from the foregoing tubestock is also disclosed.