Titanium zinc is an alloy of zinc and small amounts of titanium and copper . It is produced as sheet metal in different thicknesses (most often 0.7 mm). Titanium zinc is marketed as sheet goods or as rolled goods on coils .
Thanks to the titanium it contains, the sheet metal can also be bent parallel to the rolling direction with the minimal radii customary in plumbing technology. Pure zinc would break. Compared to pure zinc, the tensile strength and fatigue strength are also increased and the linear thermal expansion coefficient is reduced to a value of around 20 · 10 −6 / K, with the thermal expansion in the longitudinal direction of the rolling being around 25 percent higher than that in the direction of the rolling. The titanium content of titanium zinc is about 0.1 to 0.2 percent; the melting point is approx. 418 ° C - slightly below that of pure zinc.
Titanium zinc is used for metal roofs and exterior wall cladding as well as for drainage ( gutter , downpipes , accessories), as it is a very durable roofing material, the elements of which are also completely recyclable . The purely technical lifespan is approx. 75 years, but can be extended by the formation of the patina , a natural deposit. Gutters and other drainage devices made from titanium zinc have a useful life of around 40 years due to the higher levels of stress.
- Rolf Möhring (Ed.): Knowledge of building materials , founded by Wilhelm Scholz, continued by Wolfram Hiese, 17th edition, Werner, Cologne 2011, ISBN 978-3-8041-5248-9 .
- Material data sheet for titanium zinc , accessed on January 21, 2017.