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Specialty Compounds RTP Company

Materion BrushCAST® 275CT Fine Grain Casting Alloy (As Cast)
Categories: Metal; Nonferrous Metal; Copper Alloy; Copper Casting Alloy

Material Notes: Pouring Temperature: 960-1035°C
Heat treatment required for max strength (Annealing): 760-790°C/water quench
Heat treatment required for max strength (Hardening): 760-790°C/water quench

Description: The unique combination of physical and mechanical properties of copper beryllium casting alloys provide a dynamic range of metallurgical alternatives to meet specific performance requirements. The inherent strength, hardness, conductivity, and castability of these materials make them ideal for applications which require a high performance engineered material solution. Advancements in component casting technology and proprietary material production technology pioneered by Brush Wellman have resulted in BrushCAST™ alloys being a cost effective design choice.

BrushCAST™ high strength casting alloys are available in fine grain equivalents. Material properties and manufacturing characteristics are similar to those of the standard casting alloys. Grain refinement is achieved through precise additions of either cobalt or titanium. Fine grain casting alloys are preferred in applications where excellent surface finish characteristics are required in the cast product.

Information supplied by Brush Wellman Engineered Materials.

Brush Engineered Materials Inc. changed its name to Materion Corporation in March 2011.

Key Words: UNS C82800
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Physical PropertiesMetricEnglishComments
Density 8.14 g/cc0.294 lb/in³
 
Mechanical PropertiesMetricEnglishComments
Hardness, Rockwell B 80 - 9080 - 90
Tensile Strength, Ultimate 586 - 621 MPa85000 - 90000 psi
Tensile Strength, Yield 345 - 414 MPa
@Strain 0.2 %
50000 - 60000 psi
@Strain 0.2 %
Elongation at Break 5 - 25 %5 - 25 %
Modulus of Elasticity 131 GPa19000 ksi
 
Electrical PropertiesMetricEnglishComments
Electrical Resistivity 0.00000748 - 0.0000101 ohm-cm0.00000748 - 0.0000101 ohm-cmConductivity is 17-23% IACS
 
Thermal PropertiesMetricEnglishComments
CTE, linear 18.0 µm/m-°C
@Temperature 21.1 - 204 °C
10.0 µin/in-°F
@Temperature 70.0 - 400 °F
Thermal Conductivity 89.9 W/m-K624 BTU-in/hr-ft²-°F
 
Component Elements PropertiesMetricEnglishComments
Beryllium, Be 2.5 - 2.85 %2.5 - 2.85 %
Cobalt, Co 0.35 - 0.70 %0.35 - 0.70 %
Copper, Cu 96.5 %96.5 %as balance
Silicon, Si 0.20 - 0.35 %0.20 - 0.35 %
Titanium, Ti 0.020 - 0.12 %0.020 - 0.12 %

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