Songhan Plastic Technology Co.,Ltd.
 POLYMER SEARCH

CMW® 73 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® 73 Copper Alloy.pdf
Price EMAIL US    sales@lookpolymers.com
  Online Service   lookpolymers   27660005
Material Notes:
CMW® 73 material is a heat treatable copper base alloy having extremely high hardness and strength coupled with fair electrical and thermal conductivity. The extremely high hardness, strength and wear resistance is obtained in both cast and wrought material largely by means of heat treatment. It is generally useful where high stress is encountered or where high abrasion resistance is desired but where temperatures are not excessive. The annealing temperature is somewhat less than for other heat treatable high strength copper base alloys. The hardness of CMW® 73 material in the fully heat treated condition is sufficiently high to make machining somewhat difficult particularly in drilling and tapping of small holes. Where extensive machining or forming is to be done, CMW® 73 material can be supplied in the solution annealed (soft) condition and then hardened by a simple heat treatment following machining.CMW® 73 material is useful where extremely high hardness, strength and abrasion resistance is required. It may be advantageously used for certain flash and projection welding dies where high mechanical properties are required but where current density and heat are not excessive. Many of the steel strip flash welders in continuous steel strip mills are equipped with CMW® 73 die facings. The high hardness and abrasion resistance of CMW® 73 material makes it ideally suited for current carrying collets, chucks, bearings and shafts. Current carrying structural members of CMW® 73 material provide extremely high strength.Information provided by CMW Inc.
Physical Properties Metric English Comments
Density 8.25 g/cc
0.298 lb/in³
Mechanical Properties Metric English Comments
Hardness, Rockwell C 38
38
Rod & Bar
38
38
Casting
38
38
Forging
Tensile Strength, Ultimate 758 MPa
110000 psi
Castings
1170 MPa
170000 psi
Bar, Rod & Forgings
Tensile Strength, Yield 589 MPa
85400 psi
Castings
1030 MPa
149000 psi
Bar, Rod & Forgings
Elongation at Break 2.0 %
2.0 %
Castings
4.0 %
4.0 %
Rod & bar
6.0 %
6.0 %
Forging
Modulus of Elasticity 128 GPa
18600 ksi
Fatigue Strength 165 MPa
23900 psi
casting
207 MPa
30000 psi
Forging
241 MPa
35000 psi
Rod & Bar
Thermal Properties Metric English Comments
CTE, linear 17.8 µm/m-°C

@Temperature 100 °C
9.89 µin/in-°F

@Temperature 212 °F
Thermal Conductivity 130 W/m-K
902 BTU-in/hr-ft²-°F
Melting Point 857 - 982 °C
1570 - 1800 °F
Solidus 857 °C
1570 °F
Liquidus 982 °C
1800 °F
Softening Point 375 °C
707 °F
Permanent Softening
Component Elements Properties Metric English Comments
Beryllium, Be 1.9 %
1.9 %
Co + Ni 0.40 %
0.40 %
Copper, Cu 97.7 %
97.7 %
Electrical Properties Metric English Comments
Electrical Resistivity 0.00000750 ohm-cm
0.00000750 ohm-cm
Forgings (23 % IACS)
0.00000780 ohm-cm
0.00000780 ohm-cm
Drawn Rod & Bar (22% IACS)
0.00000860 ohm-cm
0.00000860 ohm-cm
Castings (20 % IACS)
Copyright © lookpolymers.com All Rights Reserved