Copper Alloy (UNS C77400)

Jul 16 2013

Topics Covered

Introduction
Chemical Composition
Physical Properties
Other Designations
Applications

Introduction

UNS C77400 is a nickel-silver copper alloy. Its silvery appearance makes it a highly sought after metal in the jewelry and ornamental areas. Copper alloys are known for their corrosion resistance and tarnish-free surface.

The following datasheet discusses the chemical composition and properties of copper UNS C77400.

Chemical Composition

The chemical composition of copper UNS C77400 is given in the following table.

Element Content (%)
Copper, Cu + Silver, Ag 43-47
Nickel, Ni 9-11
Lead, Pb 0.09
Zinc, Zn Balance

Physical Properties

The following table discusses the physical properties of copper UNS C77400.

Properties Metric Imperial
Density 8.47 g/cm3 0.306 lb/in3

Other Designations

Other designations that are equivalent to copper UNS C77400 include:

  • ASTM B124
  • ASTM B283

Applications

Copper UNS C77400 finds application in:

  • Handrails
  • Cutlery
  • Thresholds
  • Elevator trim
  • Musical instruments such as flutes and clarinets

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