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Elmet Technologies

Chromium Copper, UNS C18400, TD00 Temper, Rod
Categories: Metal; Nonferrous Metal; Copper Alloy
Material Notes: Temper: Solution Heat Treated and Cold Worked: 1/8 Hard

Fabrication Properties: Excellent Suitability – Capacity for Being Cold Worked; Good Suitability – Soldering, Brazing, Gas Shielded Arc Welding, Capacity for Being Hot Formed; Fair Suitability – Butt Weld

Common Fabrication Processes: Bending; Cold working; Drawing; Forging; Heading; Hot working; Impacting; Rolling; Swaging

Typical uses: Arcing and Bridging Parts; Cable Connectors; Circuit Breaker Parts; Contacts; Current Carrying Arms and Shafts; Electric Motor Parts Electrical Conductors Requiring Greater Strength than Copper; Generator Components; Grid Side rods in Electron Tubes; Semi Conductor Bases; Switch Contacts; Switch Gears; Thermal Conductors Requiring Greater Strength than Copper; Wire, High Temperature; Electrode Holder Jaws; Flash Welding Electrodes; Molds; Resistance Welding Electrodes; Seam Welding Wheels; Spot Welding Tips; Stressed Parts

Applicable Specifications: Bar – SAE J463, MILITARY MIL-C-19311, SAE J461; Forgings – SAE J461, SAE J463, MILITARY MIL-C-19311; Rod – SAE J461, MILITARY MIL-C-19311, SAE J463; Strip – MILITARY MIL-C-19311
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Physical PropertiesMetricEnglishComments
Density 8.89 g/cc0.321 lb/in³
 
Mechanical PropertiesMetricEnglishComments
Hardness, Rockwell B 65
@Thickness 12.7 mm		65
@Thickness 0.500 in
Tensile Strength  393 MPa
@Thickness 12.7 mm		57000 psi
@Thickness 0.500 in
 593 MPa
@Thickness 3.96 mm		86000 psi
@Thickness 0.156 in
Tensile Strength, Yield  386 MPa
@Thickness 12.7 mm		56000 psi
@Thickness 0.500 in		0.5% Ext
 531 MPa
@Thickness 3.96 mm		77000 psi
@Thickness 0.156 in		0.5% Ext
Elongation at Break  11 %
@Thickness 12.7 mm		11 %
@Thickness 0.500 in
 14 %
@Thickness 3.96 mm		14 %
@Thickness 0.156 in
Tensile Modulus 117 GPa17000 ksi
Modulus of Rigidity 49.6 GPa7200 ksi
Machinability 20 %20 %
Forgeability 80 %80 %
 
Electrical PropertiesMetricEnglishComments
Electrical Resistivity 0.00000220 ohm-cm0.00000220 ohm-cm80% IACS
 
Thermal PropertiesMetricEnglishComments
CTE, linear 17.6 µm/m-°C
@Temperature 20.0 - 100 °C		9.80 µin/in-°F
@Temperature 68.0 - 212 °F
Specific Heat Capacity 0.385 J/g-°C0.0920 BTU/lb-°F
Thermal Conductivity 26.9 W/m-K187 BTU-in/hr-ft²-°F
Melting Point 1070 - 1075 °C1958 - 1967 °F
Solidus 1070 °C1958 °F
Liquidus 1075 °C1967 °F
 
Processing PropertiesMetricEnglishComments
Solution Temperature 982 - 1010 °C
@Time 30.0 sec		1800 - 1850 °F
@Time 0.00833 hour		Air
Hot-Working Temperature 816 - 927 °C1500 - 1700 °F
Precipitation Temperature 460 °C860 °FAir
 
Component Elements PropertiesMetricEnglishComments
Arsenic, As <= 0.0050 %<= 0.0050 %
Calcium, Ca <= 0.0050 %<= 0.0050 %
Chromium, Cr 0.40 - 1.2 %0.40 - 1.2 %
Copper, Cu 97.7 - 99.6 %97.7 - 99.6 %As Balance
Iron, Fe <= 0.15 %<= 0.15 %
Lithium, Li <= 0.050 %<= 0.050 %
Phosphorus, P <= 0.050 %<= 0.050 %
Silicon, Si <= 0.10 %<= 0.10 %
Zinc, Zn <= 0.70 %<= 0.70 %
 
Descriptive Properties
Cold Work (%)60.50.5 in
 910.156 in

References for this datasheet.

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MC18400x4 / 292853




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