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CMW® 3 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® 3 Copper Alloy.pdf
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Material Notes:
CMW® 3 material is a high strength, high conductivity copper base alloy. CMW® 3 material is heat treatable. Optimum mechanical and physical properties of CMW® 3 material are developed by heat treatment or through a combination of heat treatment and cold working.CMW® 3 material is used extensively for spot welding electrodes and is well suited for custom bent designs, flash welding dies, and seam welding wheels, and provides better performance and greater savings than other copper alloys used for spot and seam welding.Property data for fully precipitation heat treated condition.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 68
68
Forging (Hot Forged and Heat Treated)
68
68
Premium Casting
78
78
Premium Forging (Hot Forged, Heat Treated, and Cold Worked to less than 1" thick)
80
80
Strip (TH04)
75

@Thickness <=25.0 mm
75

@Thickness <=0.984 in
Plate
83

@Diameter <=25.0 mm
83

@Diameter <=0.984 in
Drawn Rod & Bar
Tensile Strength, Ultimate 345 MPa
50000 psi
Premium Casting
414 MPa
60000 psi
Forging (Hot Forged and Heat Treated)
469 MPa
68000 psi
Premium Forging (Hot Forged, Heat Treated, and Cold Worked to less than 1" thick)
517 MPa
75000 psi
Strip (TH04)
448 MPa

@Thickness <=25.0 mm
65000 psi

@Thickness <=0.984 in
Plate
517 MPa

@Diameter <=25.0 mm
75000 psi

@Diameter <=0.984 in
Drawn Rod & Bar
Tensile Strength, Yield 276 MPa
40000 psi
Premium Casting
298 MPa
43200 psi
Forging (Hot Forged and Heat Treated)
414 MPa
60000 psi
Premium Forging (Hot Forged, Heat Treated, and Cold Worked to less than 1" thick)
482 MPa
69900 psi
Strip (TH04)
379 MPa

@Thickness <=25.0 mm
55000 psi

@Thickness <=0.984 in
Plate
482 MPa

@Diameter <=25.0 mm
69900 psi

@Diameter <=0.984 in
Drawn Rod & Bar
Elongation at Break 3.0 %
3.0 %
Strip (TH04)
17 %
17 %
Premium Forging (Hot Forged, Heat Treated, and Cold Worked to less than 1" thick)
20 %
20 %
Premium Casting
28 %
28 %
Forging (Hot Forged and Heat Treated)
20 %

@Thickness <=25.0 mm
20 %

@Thickness <=0.984 in
Plate
15 %

@Diameter <=25.0 mm
15 %

@Diameter <=0.984 in
Drawn Rod & Bar
Reduction of Area 45 %
45 %
Premium Casting
65 %
65 %
Premium Forging (Hot Forged, Heat Treated, and Cold Worked to less than 1" thick)
73 %
73 %
Forging (Hot Forged and Heat Treated)
60 %

@Diameter <=25.0 mm
60 %

@Diameter <=0.984 in
Drawn Rod & Bar
Modulus of Elasticity 110 GPa
16000 ksi
Bar, Rod & Forgings
110 GPa
16000 ksi
Castings & Strip
114 GPa
16500 ksi
Plate
Thermal Properties Metric English Comments
CTE, linear 17.6 µm/m-°C

@Temperature 100 °C
9.78 µin/in-°F

@Temperature 212 °F
Thermal Conductivity 324 W/m-K
2250 BTU-in/hr-ft²-°F
Melting Point 1070 - 1075 °C
1960 - 1967 °F
Solidus 1070 °C
1960 °F
Liquidus 1075 °C
1967 °F
Softening Point 500 °C
932 °F
Permanent Softening
Component Elements Properties Metric English Comments
Chromium, Cr 0.90 %
0.90 %
Copper, Cu 99.1 %
99.1 %
Electrical Properties Metric English Comments
Electrical Resistivity 0.00000203 ohm-cm
0.00000203 ohm-cm
Bar, Rod & Forgings (85 % IACS)
0.00000216 ohm-cm
0.00000216 ohm-cm
Castings & Strip (80 % IACS)
0.00000221 ohm-cm
0.00000221 ohm-cm
Plate (78 % IACS)
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