Rod nickel alloy VDM® 75

sheetplatefor the aerospace industry

The high-temperature alloy Nicrofer 7520 is a creep-resistant nickel-chromium-iron alloy with controlled carbon content and a small addition of titanium. Nicrofer 7520 is characterized by: ● excellent resistance to oxidizing atmospheres at temperatures up to 1100 °C (2000 °F) ● high scaling resistance up to 1000 °C (1830 °F) ● good mechanical properties at temperatures up to 1000 °C (1830 °F) ● good metallurgical stability Metallurgical structure Nicrofer 7520 has a face-centered cubic structure. Chromium carbides, nitrides and carbonitrides can occur in the matrix. Corrosion resistance Nicrofer 7520 shows excellent oxidation and scaling resistance up to 1100 °C (2000 °F). It forms an adherent oxide layer which protects the surface against progressive attack. Applications The high scaling resistance and good creep properties of Nicrofer 7520 give it wide application in high temperature service up to 1100 °C (2000 °F). Typical applications are: ● components for industrial and aircraft gas turbines (casings, combustion chambers, ducting) ● industrial furnace components ● high temperature fasteners, springs, dies and cores ● thermocouple sheathing Fabrication and heat treatment Nicrofer 7520 is readily fabricated by usual industrial procedures. Hot and cold working, however, require high-power machines, owing to the high strength of the material. The weldability of Nicrofer 7520 is good. Joining can be performed by all conventional welding processes. Heating It is very important that the workpiece be clean and free from any contaminant before and during heating.