Beryllium-Copper Alloy 50C, UNS C81800, TB00 Temper

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Beryllium-Copper Alloy 50C, UNS C81800, TB00 Temper
Categories:	Metal; Nonferrous Metal; Beryllium Alloy; Copper Alloy; Copper Casting Alloy
Material Notes:	Casting methods recommended for this alloy: Centrifugal, Continuous, Investment, Permanent Mold, Plaster, and Sand. Applications: Resistance welding electrodes, dies Test specimen: TB00 temper, aged 3 hours at 480°C. Inactive per the Copper Development Association.
Key Words:	BeCu; beryllium copper alloy 50C, CA 818, RWMA Class III
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Physical Properties	Original Value	Comments

Density	8.62 g/cc

Mechanical Properties	Original Value	Comments
Hardness, Rockwell B	40
Tensile Strength, Ultimate	310 MPa
Tensile Strength, Yield	83.0 MPa @Strain 0.2 %
Elongation at Break	25 %	In 50 mm
Modulus of Elasticity	110 GPa
Poissons Ratio	0.33
Machinability	30 %	UNS C36000 (free-cutting brass) = 100%
Shear Modulus	41.0 GPa

Electrical Properties	Original Value	Comments
Electrical Resistivity	0.0000359 ohm-cm @Temperature 20.0 °C

Thermal Properties	Original Value	Comments
CTE, linear	18.0 µm/m-°C @Temperature 20.0 - 300 °C
Specific Heat Capacity	0.420 J/g-°C
Thermal Conductivity	218 W/m-K @Temperature 20.0 °C
Melting Point	1010 - 1070 °C
Solidus	1010 °C
Liquidus	1070 °C
Shrinkage	1.56 %	Patternmaker's Shrinkage (3/16 in./ft.)

Processing Properties	Original Value	Comments
Solution Temperature	900 - 925 °C
Aging Temperature	480 °C
Casting Temperature	1120 - 1175 °C	Heavy castings
	1175 - 1230 °C	Light castings

Component Elements Properties	Original Value	Comments
Aluminum, Al	<= 0.10 %
Beryllium, Be	0.30 - 0.55 %
Chromium, Cr	<= 0.10 %
Cobalt, Co	1.4 - 1.7 %
Copper, Cu	>= 95.6 %
Iron, Fe	<= 0.10 %
Lead, Pb	<= 0.0020 %
Nickel, Ni	<= 0.20 %
Silicon, Si	<= 0.15 %
Silver, Ag	0.080 - 0.12 %
Tin, Sn	<= 0.10 %
Zinc, Zn	<= 0.10 %

References for this datasheet.

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MC81800b4 / 11864

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