Chromium Copper, UNS C18400, TF00 Temper flat products

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Chromium Copper, UNS C18400, TF00 Temper flat products
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 specimens: flat products - 1mm thickness aged 3 hours at 500°C. UNS C18200, UNS C18400, and UNS C18500 have similar compositions and mechanical properties.
Key Words:	CDA 184, CA184
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Physical Properties	Metric	English	Comments

Density	8.89 g/cc	0.321 lb/in³

Mechanical Properties	Metric	English	Comments
Hardness, Rockwell B	59	59
Tensile Strength, Ultimate	350 MPa	50800 psi
Tensile Strength, Yield	250 MPa	36300 psi
Elongation at Break	22 %	22 %	In 50 mm
Modulus of Elasticity	130 GPa	18900 ksi
Poissons Ratio	0.30	0.30
Machinability	20 %	20 %	UNS C36000 (free-cutting brass) = 100%
Forgeability	80 %	80 %
Shear Modulus	50.0 GPa	7250 ksi

Electrical Properties	Metric	English	Comments
Electrical Resistivity	0.00000216 ohm-cm @Temperature 20.0 °C	0.00000216 ohm-cm @Temperature 68.0 °F

Thermal Properties	Metric	English	Comments
CTE, linear	17.6 µm/m-°C @Temperature 20.0 - 100 °C	9.78 µin/in-°F @Temperature 68.0 - 212 °F
Specific Heat Capacity	0.385 J/g-°C	0.0920 BTU/lb-°F
Thermal Conductivity	26.9 W/m-K	187 BTU-in/hr-ft²-°F
Melting Point	1070 - 1075 °C	1960 - 1967 °F
Solidus	1070 °C	1960 °F
Liquidus	1075 °C	1967 °F

Processing Properties	Metric	English	Comments
Solution Temperature	980 - 1000 °C	1800 - 1830 °F	For 10-30 minutes, water quench
Aging Temperature	425 - 500 °C	797 - 932 °F	For 2-4 hours
Hot-Working Temperature	800 - 925 °C	1470 - 1700 °F
Precipitation Temperature	460 °C @Time 180 sec	860 °F @Time 0.0500 hour	Air

Component Elements Properties	Metric	English	Comments
Arsenic, As	<= 0.0050 %	<= 0.0050 %
Calcium, Ca	<= 0.0050 %	<= 0.0050 %
Chromium, Cr	0.40 - 1.2 %	0.40 - 1.2 %
Copper, Cu	99.2 %	99.2 %
Iron, Fe	<= 0.15 %	<= 0.15 %
Lithium, Li	<= 0.050 %	<= 0.050 %
Other, total	<= 0.20 %	<= 0.20 %
Phosphorus, P	<= 0.050 %	<= 0.050 %
Silicon, Si	<= 0.10 %	<= 0.10 %
Zinc, Zn	<= 0.70 %	<= 0.70 %

References for this datasheet.

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MC18400b3 / 10772

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