The Estadio Jornalista Mario Filho stadium that is currently hosting the 2014 FIFA World Cup Final uses duplex materials, supplied by Sandvik Materials Technology, for a specific portion of the roof.
Hightex GmbH, a German designer of roofing and façade membranes, used hollow bars made from Sanmac 2205 duplex stainless steel, selected for the manufacturer’s good price and fast delivery. This particular grade is a machinability-improved version of Sandvik SAF 2205TM. The latter material accounts for more 80 percent of applications of duplex stainless steel grades and has good machinability, high mechanical strength and good weldability.
Sanmac 2205 was used for the construction of the 60 cupolas, because of its ability to handle pressures of 460 kN, which provides the roof with a safety margin greater than two. The grade’s superior welding properties enabled strong welding to another stainless steel, while other elements included glass fabric material coated with Teflon for the roof itself.
After the 2014 FIFA World Cup is completed, the stadium will be used to host the Summer Olympics in 2016.