Germany, July 17 -- The U5 underground railway line in Hamburg is a showcase project.HOCHBAHN U5 Projekt GmbH, or Hamburger U5, opts for XCarb(R) recycled and renewably produced steel for Germany's largest underground railway projectCO2 savings of more than 88% compared with conventional steel production in blast furnacesThe new transport artery through the Hanseatic city will connect the outer districts in the east and west with the city centre - and do so in the most climate-friendly way possible. Hamburger Hochbahn AG and its subsidiary HOCHBAHN U5 Projekt GmbH have set themselves the goal of breaking new ground with the construction of the U5 and placing responsibility for climate protection at the heart of their planning and constructi...