Silver-Bearing Tough Pitch Copper UNS 11500

Topics Covered

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

Introduction

UNS 11500 silver-bearing tough pitch copper alloys are anneal resistant and ductile. These alloys have conductivity 101% IACS.

The datasheet given below highlights the chemical composition, physical and mechanical properties, other designations, fabrication and heat treatment and applications of UNS 11500 silver-bearing tough pitch copper alloys.

Chemical Composition

The chemical composition of UNS 11500 copper alloys is outlined in the following table.

Element Content (%)
Cu 99.90
O 0.04
Ag 0.05

Physical Properties

The following table shows the physical properties of UNS 11500 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 11500 copper alloys are displayed in the following table.

Properties Metric Imperial
Tensile strength, ultimate 221-455 MPa 32100-66000 psi
Tensile strength, yield (depending on temper) 69.0-365 MPa 10000-52900 psi
Elongation at break (in 101.6 mm (4 in.)) 55.00% 55.00%
Modulus of elasticity 117 GPa 16969 ksi
Poisson's 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 11500 copper alloys are given in the table below:

ASTM B1 ASTM B189 ASTM B229 ASTM B3 ASTM B470 ASTM B8
ASTM B116 ASTM B2 ASTM B246 ASTM B33 ASTM B49 QQ B575
ASTM B172 ASTM B224 ASTM B272 ASTM B355 ASTM B496 QQ W343
ASTM B173 ASTM B226 ASTM B286 ASTM B442 ASTM B5 SAE J461
ASTM B174 ASTM B228 ASTM B298 ASTM B47 ASTM B623 SAE J463

Fabrication and Heat treatment

Annealing

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UNS 11500 copper alloys are annealed between 482 and 760°C (900 and 1400°F).

Cold Working

UNS 11500 copper alloys can be cold worked in an excellent manner.

Hot Working

UNS 11500 copper alloys can be hot formed in an excellent manner.

Welding

Welding methods such oxyacetylene welding, coated metal arc welding, seam welding and spot welding are not recommended for UNS 11500 copper alloys. Butt welding, Soldering, brazing and gas shielded arc welding can be performed on these alloys.

Forging

Temperatures between 760 and 871°C (1400 and 1600°F) are used for forging the UNS 11500 copper alloys whose hot forgeability rating is 65%.

Machinability

The machinability rating of UNS 11500 copper alloys is 20%.

Applications

UNS 11500 copper alloys are used for commutator segments and electrical components.

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