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UNS C99400
Category Copper Alloy
Class Cast
Type Special alloy
Designations United States: UNS C99400

Composition
ElementWeight %
Cu  90.4 
Ni  2.2 
Fe  2.0 
Al  1.2 
Si  1.2 
Zn  3.0 

Mechanical Properties
Properties Conditions 
T (°C)Treatment
Density (×1000 kg/m3) 8.8-8.94 25  
Poisson's Ratio 0.34 25  
Elastic Modulus (GPa) 117 25  
Tensile Strength (Mpa) 455 (545)  25  (castings: centrifugal, continuous, investment, sand) 
Yield Strength (Mpa) 234 (372) 
Elongation (%) 25 
Reduction in Area (%)  
Note: Values in parentheses indicate responses to heat treatment
Hardness (HB) 125 (170)  25  (as cast) 
Note: Value in parentheses indicates response to heat treatment.
Glossary