Good mechanical properties at high temperatures combined with corrosion resistance. Cupral 4M (CuAl10Ni5Fe4) Areas of Application: Bending dies (shoes, wiper dies and mandrels) for the tube bending industry, wear and guide plates, aircraft landing gear bearings and bushings, gear wheels. Code: UNS No: 63020 CuAl10Ni5Fe4 - 2.0966 Heat Treatment: If intensive processing, stress relief 380 C for 4 hours is recommended.