Refractory Metal Composites

Eagle refractory metal composite materials are a combination of tungsten or tungsten carbide combined with copper or silver. The manufacturing process is to press the refractory (tungsten or tungsten carbide), sinter the pressed compact at a high temperature, and infiltrate with copper or silver. All this is done under very closely controlled conditions. The result is a relatively hard materials with superior arc and wear resistance, high physical properties at elevated temperatures, and good electrical and thermal conductivity.

CW55
RWMA Group B-
Nominal composition % Weight45 copper 55 tungsten
Rockwell Hardness79B
Electrical Conductvity % ACS55
Ultimate Tensile Strength PSI63000
Cross Breaking Strength PSI110000
Density GMS/CC12.60
Thermal Exp in/in cx10(6) at 2011.80
Thermal Conductivity W/CM °C 20-400°C2.40
Specific Heat /kg °C at 20°251
Electro resistance at 20°3.16
CW68
RWMA Group B-
Nominal composition % Weight32 copper 68 tungsten
Rockwell Hardness88B
Electrical Conductvity % ACS55
Ultimate Tensile Strength PSI75000
Cross Breaking Strength PSI130000
Density GMS/CC13.93
Thermal Exp in/in cx10(6) at 2010.90
Thermal Conductivity W/CM °C 20-400°C2.10
Specific Heat /kg °C at 20°219
Electro resistance at 20°3.33
CW70
RWMA Group Bclass 10
Nominal composition % Weight30 copper 70 tungsten
Rockwell Hardness90B
Electrical Conductvity % ACS50
Ultimate Tensile Strength PSI85000
Cross Breaking Strength PSI140000
Density GMS/CC14.18
Thermal Exp in/in cx10(6) at 2010.77
Thermal Conductivity W/CM °C 20-400°C2.01
Specific Heat /kg °C at 20°214
Electro resistance at 20°3.41
CW75
RWMA Group Bclass11
Nominal composition % Weight25 Copper 75 Tungsten
Rockwell Hardness94B
Electrical Conductvity % ACS48
Ultimate Tensile Strength PSI90000
Cross Breaking Strength PSI150000
Density GMS/CC14.70
Thermal Exp in/in cx10(6) at 2010.22
Thermal Conductivity W/CM °C 20-400°C1.89
Specific Heat /kg °C at 20°201
Electro resistance at 20°3.51
CW78
RWMA Group Bclass 11&12
Nominal composition % Weight22 Copper 78 Tungsten
Rockwell Hardness96B
Electrical Conductvity % ACS46
Ultimate Tensile Strength PSI94000
Cross Breaking Strength PSI160000
Density GMS/CC15.12
Thermal Exp in/in cx10(6) at 209.30
Thermal Conductivity W/CM °C 20-400°C1.84
Specific Heat /kg °C at 20°194
Electro resistance at 20°3.71
CW80
RWMA Group BClass 12
Nominal composition % Weight20 Copper 80 Tungsten
Rockwell Hardness98B
Electrical Conductvity % ACS44
Ultimate Tensile Strength PSI96000
Cross Breaking Strength PSI170000
Density GMS/CC15.58
Thermal Exp in/in cx10(6) at 209.20
Thermal Conductivity W/CM °C 20-400°C1.82
Specific Heat /kg °C at 20°188
Electro resistance at 20°3.9
CW85
RWMA Group B-
Nominal composition % Weight15 copper 85 tungsten
Rockwell Hardness102B
Electrical Conductvity % ACS36
Ultimate Tensile Strength PSI75000
Cross Breaking Strength PSI170000
Density GMS/CC16.19
Thermal Exp in/in cx10(6) at 207.97
Thermal Conductivity W/CM °C 20-400°C1.75
Specific Heat /kg °C at 20°175
Electro resistance at 20°4.71
CW90
RWMA Group B-
Nominal composition % Weight10 copper 90 Tungsten
Rockwell Hardness106B
Electrical Conductvity % ACS28
Ultimate Tensile Strength PSI70000
Cross Breaking Strength PSI150000
Density GMS/CC17.05
Thermal Exp in/in cx10(6) at 206.49
Thermal Conductivity W/CM °C 20-400°C1.47
Specific Heat /kg °C at 20°163
Electro resistance at 20°6.1

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