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Specialty Compounds RTP Company

Beryllium Copper, UNS C17200, TD02 Temper Strip
Categories: Metal; Nonferrous Metal; Beryllium Alloy; 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.

Key Words: BeCu; CDA 172, CB101, ISO CuBe2, CEN CW101C, A4/2, beryllium bronze; Alloy 25
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Physical PropertiesMetricEnglishComments
Density 8.25 g/cc0.298 lb/in³during age hardening, 2% max. decrease in length and 6% max. increase in density.
 
Mechanical PropertiesMetricEnglishComments
Hardness, Rockwell B 88 - 9688 - 96
 92 - 10392 - 103For rod, bar, plate and tubing <9.5 mm thickness of diameter
Hardness, Rockwell 30T 74 - 7974 - 79
Hardness, Vickers 185 - 225185 - 225
Tensile Strength, Ultimate 655 - 900 MPa95000 - 131000 psiFor rod, bar, plate and tubing, <9.5 mm thickness of diameter
Tensile Strength, Yield 515 - 655 MPa
@Strain 0.2 %
74700 - 95000 psi
@Strain 0.2 %
Elongation at Break 10 - 20 %10 - 20 %For rod, bar, plate and tubing, <9.5 mm thickness of diameter, In 50 mm
 5.0 - 25 %5.0 - 25 %in 50 mm
Modulus of Elasticity 125 - 130 GPa18100 - 18900 ksi
Poissons Ratio 0.300.30
Fatigue Strength 220 - 260 MPa
@# of Cycles 1.00e+8
31900 - 37700 psi
@# of Cycles 1.00e+8
Reverse Bending
Machinability 20 %20 %UNS C36000 (free-cutting brass) = 100%
Forgeability 40 %40 %
Shear Modulus 50.0 GPa7250 ksi
 
Electrical PropertiesMetricEnglishComments
Electrical Resistivity 0.000010 - 0.000011 ohm-cm
@Temperature 20.0 °C
0.000010 - 0.000011 ohm-cm
@Temperature 68.0 °F
 
Thermal PropertiesMetricEnglishComments
CTE, linear  16.7 µm/m-°C
@Temperature 20.0 - 100 °C
9.28 µin/in-°F
@Temperature 68.0 - 212 °F
 17.0 µm/m-°C
@Temperature 20.0 - 200 °C
9.44 µin/in-°F
@Temperature 68.0 - 392 °F
 17.8 µm/m-°C
@Temperature 20.0 - 300 °C
9.89 µin/in-°F
@Temperature 68.0 - 572 °F
Specific Heat Capacity 0.420 J/g-°C0.100 BTU/lb-°F
Thermal Conductivity  105 - 130 W/m-K
@Temperature 20.0 °C
729 - 902 BTU-in/hr-ft²-°F
@Temperature 68.0 °F
 130 - 133 W/m-K
@Temperature 200 °C
902 - 923 BTU-in/hr-ft²-°F
@Temperature 392 °F
Melting Point 865 - 980 °C1590 - 1800 °F
Solidus 865 °C1590 °F
Liquidus 980 °C1800 °F
 
Processing PropertiesMetricEnglishComments
Processing Temperature 845 °C1550 °FHot-Shortness Temperature
Annealing Temperature 760 - 790 °C1400 - 1450 °F
Solution Temperature 760 - 790 °C1400 - 1450 °F
Aging Temperature 260 - 425 °C500 - 797 °F
Hot-Working Temperature 650 - 800 °C1200 - 1470 °F
Precipitation Temperature >= 316 °C
@Time 180 sec
>= 600 °F
@Time 0.0500 hour
Air
Recrystallization Temperature 730 °C1350 °F
 
Component Elements PropertiesMetricEnglishComments
Beryllium, Be 1.8 - 2.0 %1.8 - 2.0 %
Co + Ni >= 0.20 %>= 0.20 %
Co + Ni + Fe <= 0.60 %<= 0.60 %
Copper, Cu 97 %97 %
Lead, Pb <= 0.10 %<= 0.10 %
Other, total <= 0.50 %<= 0.50 %

References for this datasheet.

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MC17200b4 / 10818

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