Home - S+D Spezialstahl Handelsgesellschaft mbH - your stock and service expert for high-performance material as CP Titanium, Titanium alloys and special steels Metal trading with a high level of inventory. Special materials and special alloys available for delivery at short notice. Request your material now! We look forward to hearing from you. S+D - Your stockholding and service expert for high-performance materials. The S+D Spezialstahl Group of companies with offices in Germany, UK, France, Italy and the Czech Republic and is one of the largest stockists of semi-finished, high-performance materials in Europe. Our stocks include titanium and titanium alloys, special stainless steel for aviation and aerospace and nickel based alloys. These products are extensively supplied to leading aerospace OEMs and their subcontractors.