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UNS C81700
Category Copper Alloy
Class Cast
Type High-copper alloy
Designations United States: UNS C81700

Composition
ElementWeight %
Cu  94.25 (min) 
Ag  1.0 
Be  0.4 
Co  0.9 
Ni  0.9 

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) (634)  25  (castings: centrifugal, continuous, investment, permanent mold, plaster, sand) 
Yield Strength (Mpa) (469) 
Elongation (%) (8) 
Reduction in Area (%)  
Note: Values in parentheses indicate responses to heat treatment
Hardness (HB) (217)  25  (as cast) 
Note: Value in parentheses indicates response to heat treatment.
Glossary
Metal 3D Printing Design Guide

Direct Metal Laser Sintering (DMLS) 3D printing for parts with reduced cost and little waste.

Injection Molding Design Guide

Guide for high quality and cost-effective plastic injection molding.

Mechanical Engineers Outlook

Guide for those interested in becoming a mechanical engineer. Includes qualifications, pay, and job duties.

Selecting the Right 3D Printer

Discover how to choose the right 3D printer for your needs and the key performance attributes to consider.