Electrolytic Tough Pitch Copper (UNS C11100)

Topics Covered

Introduction
Chemical Composition
Physical Properties
Mechanical Properties
Other Designations
Fabrication and Heat Treatment
     Annealing
     Cold Working
     Welding
     Forging
     Machinability
     Hot Working

Introduction

UNS C11100 electrolytic tough pitch copper alloys are anneal resistant. The following datasheet covers the chemical composition, physical and mechanical properties, designations and fabrication and heat treatment of UNS C11100 copper alloys.

Chemical Composition

The chemical composition of UNS C11100 copper alloys is outlined in the following table.

Element Content (%)
Cu 99.90
O 0.04
Cd 0.01

Physical Properties

The following table shows the physical properties of UNS C11100 copper alloys.

Properties Metric Imperial
Density 8.89 - 8.94 g/cm3 0.321 - 0.323 lb/in3

Mechanical Properties

The mechanical properties of UNS C11100 copper alloys are displayed in the following table.

Properties Metric Imperial
Hardness, rockwell B (depending on temper) 10.0-62.0 10.0-62.0
Tensile strength, ultimate 455 MPa 66000 psi
Tensile strength, yield (depending on temper) 69.0-365 MPa 10000-52900 psi
Elongation at break (in 150 cm) 1.50% 1.50%
Modulus of elasticity 117 GPa 16969 ksi
Poissons ratio 0.34 0.34
Machinability (UNS C36000 (free-cutting brass) = 100%) 20% 20%
Shear modulus 44.0 GPa 6380 ksi

Other Designations

Equivalent materials to UNS C11100 copper alloys are:

  • ASTM B224
  • UNS C11100

Fabrication and Heat Treatment

Annealing

UNS C11100 copper alloys are annealed at temperatures between 482 and 760°C (900 and 1400°F).

Cold Working

UNS C11100 copper alloys have excellent cold working capacity.

Welding

Welding methods not recommended for UNS C11100 copper alloys include oxyacetylene welding, coated metal arc welding, seam welding and spot welding. Butt welding and gas shielded arc welding can be performed on these copper alloys including brazing and soldering processes.

Forging

Temperatures between 760 and 871°C (1400 and 1600°F) are used for forging UNS C11100 copper alloys whose hot forgeability rating is 65%.

Machinability

The machinability rating for C11100 copper alloys is 20%.

Hot Working

C11100 copper alloys have excellent hot forming properties.

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