A material includes a sheet of metal having a first face and an opposed second face, and a metal grain direction. The first face is textured with a first set of texturing features. Each texturing feature of the first set includes, respectively, a groove cut into the first face and extending along a groove axis, and a barb extending from the groove and away from the first face. The texturing features of the first set are arranged in a plurality of rows, and the groove axes of the texturing features in a given row extend generally parallel to the given row. The rows are generally non-perpendicular to the grain direction.

A strength-reinforcing metal sheet having repetitive concave and convex features is provided. Concave beads extend in repetitive quadrangular lattice features. A plurality of convex cells are defined between the beads, protrude above the beads, and have repetitive convex features. The upper portion of each of the cells has a pyramidal shape similar to a dome. The uppermost point thereof is formed at an eccentric point offset from the central point of the cell.

A strength-reinforcing metal sheet having repetitive concave and convex features is provided. Concave beads extend in repetitive quadrangular lattice features. A plurality of convex cells are defined between the beads, protrude above the beads, and have repetitive convex features. The upper portion of each of the cells has a pyramidal shape similar to a dome. The uppermost point thereof is formed at an eccentric point offset from the central point of the cell.

A sandwich structure employs a core sheet including alternating peaks and valleys therein, and at least one outer face sheet including grooves or ribs therein. In another aspect, a sandwich structure includes at least one core and at least one adhesively bonded outer face sheet including elongated grooves or ribs formed therein. Yet another aspect of a sandwich structure has raised ridges bridging between adjacent peaks in a core sheet in one direction but not in a perpendicular direction, which synergistically interface, engage or contact with grooves or ribs formed in an outer face sheet.

The present invention provides a new aluminum alloy material which may be used for a core alloy of a corrosion-resistant brazing sheet. This core alloy displays with high strength, and good corrosion resistance for use in heat exchangers. This aluminum alloy material was made by direct chill (DC) casting. The present inventions also provides corrosion-resistant brazing sheet packages including the aluminum alloy material as a core and one or more cladding layers.

This application discloses a corrosion-resistant brazing sheet package for use in manufacturing tubing. The brazing sheet package includes a core layer of aluminum-containing alloy comprising from 0.1 wt % to 0.2 wt % of titanium. The core layer has a first side and a second side. The first side of the core layer is adjacent to a first cladding layer to form a first interface. The second side of the core layer is adjacent to a second cladding layer to form a second interface. The first cladding layer and the second cladding layer each include from 2.5 wt % to 4.0 wt % of zinc.

A spacer structure for a sandwich construction, formed from a material web which is provided with a plurality of cuts and which has a material web plane as a first plane, wherein, by forming the material web, at least one support platform is formed in portions which is spaced at a distance from the first plane and is arranged in a second plane. Spacing elements run along a direction of extent (E) from the first plane into the second plane in the transition zone from the first plane into the second plane and thus the spacing elements space the first plane apart from the support platform, the spacing elements having a twist about the direction of extent thereof along the direction of extent thereof (E), the twist being formed by the shaping of the material web being performed as bending.