Copper Alloy (UNS C94320)

Jul 10 2013

Topics Covered

Introduction
Chemical Composition
Physical Properties
Other Designations
Applications

Introduction

The important alloys of copper and tin from an industrial point of view are the bronzes. The cast tin bronzes are designated by UNS C90200 through C91700. Lead is added to tin bronzes for improving machinability and pressure tightness. The cast leaded tin bronzes are designated as UNS C92200 through C94500.

Copper UNS C94320 has good corrosion resistance, but oxidizes when exposed to oxidizing acids, sulfides, ammonia or moist halogens. The following datasheet discusses the chemical composition and properties of copper UNS C94320.

Chemical Composition

The chemical composition of copper UNS C94320 is given in the following table.

Element Content (%)
Lead, Pb 24-32
Tin, Sn 4-7
Iron, Fe 0.35
Copper, Cu Balance

Physical Properties

The following table discusses the physical properties of copper UNS C94320.

Properties Metric Imperial
Density 8.9 g/cm3 0.323 lb/in3

Other Designations

An equivalent material to UNS C94320 copper alloy is SAE J460.

Applications

Copper UNS C94320 finds application in:

  • Waveguides
  • Rectifiers
  • Coaxial cables
  • Glass-to-metal seals
  • Transistor components
  • Microwave tubes
  • Anodes for vacuum tubes
  • Klystrons

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