Copper-Cobalt-Beryllium alloy, UNS C17500, TH04 Temper strip, rod, bar, plate, tubing

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Copper-Cobalt-Beryllium alloy, UNS C17500, TH04 Temper strip, rod, bar, plate, tubing
Categories:	Metal; Nonferrous Metal; Beryllium Alloy; Copper Alloy
Material Notes:	Good to excellent corrosion resistance. Excellent cold workability; good hot formability. Applications: fuse clips, fasteners, springs, switch and relay parts, electrical conductors, welding equipment. TH04 temper strip, rod, bar, plate, and tubing.
Key Words:	BeCu; low beryllium copper, C112, ISO CuCo2Be, CEN CW104C, A3/1
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Physical Properties	Metric	English	Comments

Density	8.75 g/cc	0.316 lb/in³

Mechanical Properties	Metric	English	Comments
Hardness, Rockwell B	95 - 102	95 - 102	Rod, plate, bar, tubing
	98 - 102	98 - 102	Strip
Tensile Strength, Ultimate	760 - 895 MPa	110000 - 130000 psi
Tensile Strength, Yield	690 - 825 MPa @Strain 0.2 %	100000 - 120000 psi @Strain 0.2 %
Elongation at Break	8.0 - 15 %	8.0 - 15 %	In 50 mm, strip
	10 - 20 %	10 - 20 %	In 50 mm, rod, bar, plate, tubing
Modulus of Elasticity	125 - 130 GPa	18100 - 18900 ksi
Fatigue Strength	240 MPa	34800 psi	Strip
Machinability	40 %	40 %

Electrical Properties	Metric	English	Comments
Electrical Resistivity	0.0000029 - 0.0000034 ohm-cm @Temperature 20.0 °C	0.0000029 - 0.0000034 ohm-cm @Temperature 68.0 °F

Thermal Properties	Metric	English	Comments
CTE, linear	17.6 µm/m-°C @Temperature 20.0 - 200 °C	9.78 µin/in-°F @Temperature 68.0 - 392 °F
Specific Heat Capacity	0.420 J/g-°C	0.100 BTU/lb-°F
Thermal Conductivity	17.3 W/m-K	120 BTU-in/hr-ft²-°F
Melting Point	1030 - 1070 °C	1890 - 1960 °F
Solidus	1030 °C	1890 °F
Liquidus	1070 °C	1960 °F

Processing Properties	Metric	English	Comments
Processing Temperature	980 °C	1800 °F	Hot-Shortness Temperature
Solution Temperature	900 - 925 °C	1650 - 1700 °F	Large sections, 1 hour per inch or fraction of an inch
	900 - 955 °C	1650 - 1750 °F	10 minutes, water quench
Aging Temperature	425 °C	797 °F	3-6 hours, for maximum strength
	470 - 495 °C	878 - 923 °F	Commercial practice, 2-3 hours
Hot-Working Temperature	700 - 925 °C	1290 - 1700 °F
Precipitation Temperature	>= 482 °C @Time 7200 sec	>= 900 °F @Time 2.00 hour	Air

Component Elements Properties	Metric	English	Comments
Beryllium, Be	0.40 - 0.70 %	0.40 - 0.70 %
Cobalt, Co	2.4 - 2.7 %	2.4 - 2.7 %
Copper, Cu	96.9 %	96.9 %
Iron, Fe	>= 0.10 %	>= 0.10 %
Other, total	>= 0.50 %	>= 0.50 %

References for this datasheet.

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MC17500b5 / 10898

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