Chromium Copper, UNS C18500, OSO60 tube

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Chromium Copper, UNS C18500, OSO60 tube
Categories:	Metal; Nonferrous Metal; Copper Alloy
Material Notes:	Good to excellent corrosion resistance. Excellent cold workability; good hot workability. Applications: resistance welding electrodes, seam welding wheels, switch gear, electrode holder jaws, cable connectors, current carrying arms and shafts, circuit breaker parts, molds, spot welding tips, flash welding electrodes, electrical and thermal conductors requiring strength, switch contacts. Test specimen: tube - 9.5mm OD x 2.4mm wall thickness. UNS C18500 is inactive per the Copper Development Association. UNS C18200, UNS C18400, and UNS C18500 have similar compositions and mechanical properties.
Key Words:	CDA 185, CA185
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Physical Properties	Original Value	Comments

Density	8.89 g/cc

Mechanical Properties	Original Value	Comments
Hardness, Rockwell F	59
Tensile Strength, Ultimate	275 MPa
Tensile Strength, Yield	105 MPa
Elongation at Break	50 %	In 50 mm
Modulus of Elasticity	130 GPa
Poissons Ratio	0.30
Machinability	20 %	UNS C36000 (free-cutting brass) = 100%
Shear Modulus	50.0 GPa

Electrical Properties	Original Value	Comments
Electrical Resistivity	0.00000216 ohm-cm @Temperature 20.0 °C

Thermal Properties	Original Value	Comments
CTE, linear	17.6 µm/m-°C @Temperature 20.0 - 100 °C
Specific Heat Capacity	0.385 J/g-°C
Melting Point	1070 - 1075 °C
Solidus	1070 °C
Liquidus	1075 °C

Processing Properties	Original Value	Comments
Solution Temperature	980 - 1000 °C	For 10-30 minutes, water quench
Aging Temperature	425 - 500 °C	For 2-4 hours
Hot-Working Temperature	800 - 925 °C

Component Elements Properties	Original Value	Comments
Chromium, Cr	0.40 - 1.0 %
Copper, Cu	99.3 %
Lead, Pb	<= 0.015 %
Lithium, Li	<= 0.040 %
Phosphorus, P	<= 0.040 %
Silver, Ag	0.080 - 0.12 %

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MC18500b9 / 10799

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