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CMW® 328 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® 328 Copper Alloy.pdf
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Material Notes:
CMW® 328 material is a high strength, high conductivity copper base alloy. CMW® 328 is heat treatable. Optimum mechanical and physical properties of CMW® 328 material are developed by heat treatment or through a combination of heat treatment and cold working.CMW® 328 material is used extensively for cap style resistance welding electrodes. Evidence suggests that it can provide less sticking and resist deformation longer than its copper-chrome counterpart (CMW® 3) in some specific situations. CMW® 328 can be substituted for CMW® 3 in any structural or current carrying situation without fear of degrading the design.Information provided by CMW Inc.
Physical Properties Metric English Comments
Density 8.90 g/cc
0.322 lb/in³
Mechanical Properties Metric English Comments
Hardness, Rockwell B 75
75
Drawn Rod & Bar
Tensile Strength, Ultimate 455 MPa
66000 psi
Drawn Rod & Bar
Tensile Strength, Yield 425 MPa
61600 psi
Elongation at Break 19 %
19 %
Drawn Rod & Bar
Modulus of Elasticity 120 GPa
17400 ksi
Bar, Rod & Strip
Thermal Properties Metric English Comments
CTE, linear 17.0 µm/m-°C

@Temperature 100 °C
9.44 µin/in-°F

@Temperature 212 °F
Thermal Conductivity 322 W/m-K
2230 BTU-in/hr-ft²-°F
Melting Point 1075 - 1080 °C
1967 - 1980 °F
Solidus 1075 °C
1967 °F
Liquidus 1080 °C
1980 °F
Softening Point 480 °C
896 °F
Permanent Softening
Component Elements Properties Metric English Comments
Chromium, Cr 1.0 %
1.0 %
Copper, Cu 98.85 %
98.85 %
Zirconium, Zr 0.15 %
0.15 %
Electrical Properties Metric English Comments
Electrical Resistivity 0.00000216 ohm-cm
0.00000216 ohm-cm
Bar & Rod (80 % IACS)
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