Copper Alloy UNS C42200

Topics Covered

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

Introduction

Copper alloy UNS C42200 is a copper-zinc alloy. The excellent cold working characteristics of UNS C42200 copper alloy makes it a preferred alloy for architecture. UNS C42200 changes its color based on the alloying metals present. Recycling of brass is very cost-effective. Brasses have excellent machinability and are anti-corrosive.

The following datasheet summarizes the chemical composition and properties of UNS C42200 copper alloy.

Chemical Composition

The following table presents the chemical composition of UNS C42200.

Element Content (%)
Copper, Cu 87.5
Tin, Sn 1.1
Zinc, Zn 11.4

Physical Properties

The physical properties of UNS C42200 copper alloy are denoted in the following table.

Properties Metric Imperial
Density 8.8 - 8.94 g/cm3 0.316 – 0.322 lb/in3
Melting point 1020 - 1040°C 1870 - 1900°F
Solidus 1020°C 1870°F
Liquidus 1040°C 1900°F

Mechanical Properties

The mechanical properties of UNS C42200 are summarized in the following table.

Properties Metric Imperial
Tensile strength 296 - 607 MPa 42900 - 88000 psi
Yield strength 103 - 517 MPa 14900 - 75000 psi
Elongation at break 46.00% 46.00%
Poisson's ratio 0.34 0.34
Elastic modulus 117 GPa 16969 ksi
Machinability 30 30

Thermal Properties

The following table shows the thermal properties of UNS C42200 copper alloy.

Properties Metric Imperial
Thermal conductivity (@20°C/68°F) 130 W/mK 902 BTUin/hr.ft2°F

Other Designations

Equivalent designations to UNS C42200 include:

  • ASTM B591

Fabrication and Heat Treatment

Machinability

The machinability rating of UNS C42200 copper alloy is 30.

Welding

The preferred welding techniques for UNS C42200 are soldering, brazing, gas shielded arc welding, spot welding, seam welding and butt welding. Oxyacetylene welding is not recommended for UNS C42200 copper alloy.

Forging

UNS C42200 is forged at temperatures ranging between 829 and 890ºC (1525 and 1635ºF).

Hot Working

UNS C42200 copper alloy produces good results on hot working.

Cold Working

UNS C42200 deforms well on cold working.

Annealing

The temperatures ranging between 498 and 676ºC (930 and 1250ºF) are preferred for annealing UNS C42200 copper alloy.

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