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CMW® 28 Copper Alloy

Category Metal , Nonferrous Metal , Copper Alloy
Manufacturer CMW Inc.
Trade Name
Port Ningbo port,China
Trade Terms FOB, CFR, CIF
Payment Terms L/C, T/T, Western Union
Download PDF CMW® 28 Copper Alloy.pdf
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Material Notes:
CMW® 28 material is a copper base alloy having very high electrical and thermal conductivity and medium strength and toughness. It is a heat treatable alloy and develops its strength and hardness through a combination of heat treatment and cold working. In more massive sections it will have reduced strength and hardness. CMW® 28 material is supplied in rod form.CMW® 28 material is used very successfully in the form of resistance welding electrodes. It is recommended for the welding of coated steel and materials of high conductivity excluding silver and copper. CMW® 28 material has a machinability rating of 20 with free cutting brass being 100.Information provided by CMW Inc.
Physical Properties Metric English Comments
Density 8.89 g/cc
0.321 lb/in³
Mechanical Properties Metric English Comments
Hardness, Rockwell B 70

@Diameter <=15.9 mm
70

@Diameter <=0.625 in
Rod
Tensile Strength, Ultimate 455 MPa

@Diameter <=15.9 mm
66000 psi

@Diameter <=0.625 in
Rod
Tensile Strength, Yield 386 MPa

@Diameter <=15.9 mm
56000 psi

@Diameter <=0.625 in
Rod
Elongation at Break 10 %

@Diameter <=15.9 mm
10 %

@Diameter <=0.625 in
Rod
Modulus of Elasticity 130 GPa
18900 ksi
Bar, Rod & Strip
Thermal Properties Metric English Comments
CTE, linear 16.3 µm/m-°C

@Temperature 100 °C
9.06 µin/in-°F

@Temperature 212 °F
Thermal Conductivity 367 W/m-K
2550 BTU-in/hr-ft²-°F
Melting Point 980 - 1080 °C
1800 - 1980 °F
Solidus 980 °C
1800 °F
Liquidus 1080 °C
1980 °F
Softening Point 500 °C
932 °F
Permanent Softening
Component Elements Properties Metric English Comments
Copper, Cu 99.85 %
99.85 %
Zirconium, Zr 0.15 %
0.15 %
Electrical Properties Metric English Comments
Electrical Resistivity 0.00000192 ohm-cm
0.00000192 ohm-cm
Bar & Rod (90 % IACS)
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