Standard Grade GB/T8890 B7 Cu Balance Ni+Co 6-7 Pb 0.01 Fe 0.2 P 0.01 Mn 0.2 S 0.01 C 0.03 Sb 0.005 Bi 0.002 As 0.01 Total impurities 0.3 Condition M Y2 Tensile Strength N/mm2 270 min. 300 min. Elongation (%) 35 18 Typical use This alloy has similar characteristic of CuNi 90/10, but with low content of Nickel. Longda invents and has the patent of this alloy • Hot Working Properties: Good Density (20°C): 8,94 g/cm3 • Cold Working Properties: Good Weight Formula Average Wall: (OD-WT) x WT x 0,0284= Kg/m (all sizes in mm) Minimum Wall: (OD-WT) x WT x 0,0295 = Kg/m (all sizes in mm)