Copper Alloy (UNS C64700)

Jul 15 2013

Topics Covered

Introduction
Chemical Composition
Physical Properties
Other Designations
Applications

Introduction

UNS designations C64700 to C66100 indicate silicon bronzes, a specific category of copper alloys. Due to their good workability, durability, and attractive golden bronze color, silicon bronzes are the preferred choice of metalsmiths and sculptors.

Copper UNS C64700 is a silicon bronze wrought alloy that has moderate strength and good corrosion resistance, and is similar to C64200 alloy. The following datasheet discusses the chemical composition and properties of copper UNS C64700.

Chemical Composition

The chemical composition of copper UNS C64700 is given in the following table.

Element Content (%)
Nickel, Ni 1.6-2.2
Zinc, Zn 0.5
Silicon, Si 0.4-0.8
Lead, Pb 0.1
Iron, Fe 0.1
Copper, Cu Balance

Physical Properties

The following table discusses the physical properties of copper UNS C64700.

Properties Metric Imperial
Density 8.9 g/cm3 0.323 lb/in3
Melting point 1060°C 1940°F

Other Designations

Other designations that are equivalent to copper UNS C64700 include:

  • ASTM B411
  • ASTM B412

Applications

Copper UNS C64700 is used in:

  • Fasteners
  • Marine fittings
  • Pole line hardware
  • Valve guides and valve stems

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