Copper (UNS C18990)

May 22 2013

Topics Covered

Introduction
Chemical Composition
Physical Properties
Applications

Introduction

Copper is a chemical element with the symbol Cu and atomic number 29.

High copper alloys are made from copper ores. They possess excellent electrical and thermal conductivity features compared to any other commercial metal. They are also soft and malleable. UNS C18990 is a high copper / pure copper alloy. It is a wrought alloy.

The following datasheet discusses the chemical composition and properties of copper UNS C18990.

Chemical Composition

The chemical composition of copper UNS C18990 is given in the following table.

Element Content (%)
Tin, Sn 1.8 - 2.2
Chromium, Cr 0.1 - 0.2
Phosphorus, P 0.005 - 0.015
Copper, Cu + Silver, Ag Balance

Physical Properties

The following table discusses the physical properties of copper UNS C18990.

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

Applications

Copper UNS C18990 finds application in:

  • Microwave tubes
  • Vacuum seals
  • Transistor components.
  • Bus conductors

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