Beryllium Copper, UNS C17300, TH02 Temper Strip

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Beryllium Copper, UNS C17300, TH02 Temper Strip
Categories:	Metal; Nonferrous Metal; Copper Alloy
Material Notes:	Good to excellent corrosion resistance. Excellent cold workability; good hot formability. Commonly fabricated by blanking, forming and bending, turning, drilling, tapping. Applications: springs, flexible metal hose, Bourdon tubing, bellows, clips, washers, retaining rings, and other parts subject to severe forming conditions but require high strength, anelasticity, and fatigue and creep resistance; in parts that require high strength or wear resistance along with good electrical conductivity and/or magnetic characteristics such as navigational instruments, non-sparking safety tools, firing pins, bushings, valves, pumps, shafts, and rolling mill parts. Proprietary mill treatment to produce the indicated tensile properties.
Key Words:	BeCu; CDA 173, ISO CuBe2Pb, CEN CW102C; Alloy M25
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Physical Properties	Original Value	Comments

Density	8.25 g/cc	during age hardening, 2% max. decrease in length and 6% max. increase in density.

Mechanical Properties	Original Value	Comments
Hardness, Rockwell C	39 - 44
Hardness, Rockwell HR30N	59 - 65
Hardness, Vickers	>= 380
Tensile Strength, Ultimate	1275 - 1450 MPa
Tensile Strength, Yield	1105 - 1345 MPa @Strain 0.2 %
Elongation at Break	2.0 - 5.0 %	in 50 mm
Modulus of Elasticity	125 - 130 GPa
Poissons Ratio	0.30
Fatigue Strength	270 - 295 MPa @# of Cycles 1.00e+8	Reverse Bending
Machinability	50 %	UNS C36000 (free-cutting brass) = 100%
Shear Modulus	50.0 GPa

Electrical Properties	Original Value	Comments
Electrical Resistivity	0.0000069 - 0.0000078 ohm-cm @Temperature 20.0 °C

Thermal Properties	Original Value	Comments
CTE, linear	16.7 µm/m-°C @Temperature 20.0 - 100 °C
	17.0 µm/m-°C @Temperature 20.0 - 200 °C
	17.8 µm/m-°C @Temperature 20.0 - 300 °C
Specific Heat Capacity	0.420 J/g-°C
Thermal Conductivity	105 - 130 W/m-K @Temperature 20.0 °C
	130 - 133 W/m-K @Temperature 200 °C
Melting Point	865 - 980 °C
Solidus	865 °C
Liquidus	980 °C

Processing Properties	Original Value	Comments
Processing Temperature	845 °C	Hot-Shortness Temperature
Annealing Temperature	760 - 790 °C
Solution Temperature	760 - 790 °C
Aging Temperature	260 - 425 °C
Hot-Working Temperature	650 - 800 °C
Precipitation Temperature	600 °F @Time 180 sec	Air
Recrystallization Temperature	730 °C

Component Elements Properties	Original Value	Comments
Beryllium, Be	1.8 - 2.0 %
Co + Ni	>= 0.20 %
Co + Ni + Fe	<= 0.60 %
Copper, Cu	97 %
Lead, Pb	0.20 - 0.60 %
Other, total	<= 0.50 %

References for this datasheet.

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MC17300b7 / 10827

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