From a January, 2010 piece on DesignBoom:

Hook and loop fasteners have become commonplace features of both industry and households. However, they have one snag: they are too weak for many applications. Hook and loop fasteners made of spring steel have now been developed at the Institute of Metal Forming and Casting of the Technische Universitaet Muenchen (TUM).

The device consists of hook tape and loop tape 0.2 mm thick. These fasteners are resistant to chemicals and can withstand a tensile load of up to 35 tonnes per square meter at temperatures as high as 800°C.

Metallic velcro: steel hook and loop fastener