Copper-Cobalt-Beryllium alloy, UNS C17500, H04 Temper strip

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Copper-Cobalt-Beryllium alloy, UNS C17500, H04 Temper strip
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. Available as flat products, rod.
Key Words:	BeCu; low beryllium copper, C112, ISO CuCo2Be, CEN CW104C, A3/1
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Physical Properties	Original Value	Comments

Density	8.75 g/cc

Mechanical Properties	Original Value	Comments
Hardness, Rockwell B	70 - 80	Strip
Tensile Strength, Ultimate	485 - 585 MPa	Strip
Tensile Strength, Yield	380 - 550 MPa @Strain 0.2 %	Strip
Elongation at Break	3.0 - 10 %	Strip, In 50 mm
Modulus of Elasticity	125 - 130 GPa
Fatigue Strength	205 MPa	Strip
Machinability	40 %

Electrical Properties	Original Value	Comments
Electrical Resistivity	0.0000057 - 0.0000086 ohm-cm @Temperature 20.0 °C

Thermal Properties	Original Value	Comments
CTE, linear	17.6 µm/m-°C @Temperature 20.0 - 200 °C
Specific Heat Capacity	0.420 J/g-°C
Thermal Conductivity	120 BTU-in/hr-ft²-°F
Melting Point	1030 - 1070 °C
Solidus	1030 °C
Liquidus	1070 °C

Processing Properties	Original Value	Comments
Processing Temperature	980 °C	Hot-Shortness Temperature
Solution Temperature	900 - 925 °C	Large sections, 1 hour per inch or fraction of an inch
	900 - 955 °C	10 minutes, water quench
Aging Temperature	425 °C	3-6 hours, for maximum strength
	470 - 495 °C	Commercial practice, 2-3 hours
Hot-Working Temperature	700 - 925 °C
Precipitation Temperature	>= 900 °F @Time 7200 sec	Air

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

References for this datasheet.

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MC17500b3 / 10896

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