Cu-Ni 90-10 is the cupronickel material that is having 10% of nickel and 90% of copper in it. Also, it is containing small proportions of manganese and iron just for enhancing the strong corrosion resistance. Also, it is combined with very good toughness and greater ductility thus becoming a good selection for industrial, marine applications. 90-10 is offering very good resistance to bio-fouling, stress corrosion, and erosion and also it is having welding and fabrication properties.Cu 90/10 flanges pass through various tests before it reaches to the doorstep of the clients. Several tests performed on it are toughness tests, mechanical tests, macro tests, chemical composition tests, etc.