The content variation in the grade is done to achieve precedence over the 90/10 grade in terms of better strength and stability. The grade is delivered in a very pure form. Like the 90/10 grade, even the copper-nickel 70/30 has alpha phase structure since nickel becomes soluble in the copper phase. Although complete homogeneity is not obtained due to the addition of other alloying elements, the grade almost becomes a balanced compound with a homogenized phase structure. Grade 70/30 has high strength and better ductility. The microstructure of the grade provides it high thermal as well as physical stability.
A considerably high impact strength is obtained from the grade to be used in dynamic applications. After noting its corrosion resistance in polluted and turbulent streams of water, it showed commendable corrosion resistance. The grade is specifically used in imbalanced environments like variable pressures, temperatures, higher velocity flow and turbulence. A high resistance to cracking due to corrosion is obtained. The grade can be used conveniently up to 370°C for relevant applications. The possion's ratio of the grade is slightly higher when compared to standard austenitic steels with exceptional toughness and elastic properties. The grade also has fine electric resistance and electric properties to be used in marine power applications apart from its corrosion resistance underwater.
In fact, it is widely used in electrical engineering space as cables, anodes in TV tubes, and resistors. The grade can be hot worked and cold worked very conveniently. Hot working processes like forging can be carried out at 930-1040°C, with subsequent annealing for grain refinement. The grade comes in the group of corrosion-resistant and moisture-resistant alloys suitably resisting acids, salt solutions, organic solutions and alkalis.