UNS C82500 (Alloy 20C) Beryllium Copper
Copper Alloys
as-fabricated (no
Property Overview
Density8.8g/cm³
Elastic Modulus120GPa
Tensile Strength550MPa
Yield Strength310MPa
Brinell HardnessUnknown
Maximum Service Temperature280°C
Chemical Composition
CR
0 to 0.1%
NI
0 to 0.2%
SI
0.2 to 0.35%
CU
95.3 to 97.8%
TI
0 to 0.12%
AL
0 to 0.15%
CO
0.15 to 0.7%
BE
1.9 to 2.3%
PB
0 to 0.020%
RES.
Residuals res. | | 0 to 0.5%
RESIDUALS RES.
0 to 0.5%
SN
0 to 0.1%
ZN
0 to 0.1%
FE
0 to 0.25%
Mechanical
Elastic (Young's, Tensile) Modulus
120 GPa
Elongation at Break
20 %
Poisson's Ratio
0.33
Shear Modulus
45 GPa
Tensile Strength: Ultimate (UTS)
550 MPa
Tensile Strength: Yield (Proof)
310 MPa
Hardness
Rockwell B Hardness
82
Physical
Density
8.8 g/cm 3
Thermal
Latent Heat of Fusion
240 J/g
Maximum Temperature: Mechanical
280 °C
Melting Completion (Liquidus)
980 °C
Melting Onset (Solidus)
860 °C
Specific Heat Capacity
390 J/kg-K
Thermal Conductivity
130 W/m-K
Thermal Diffusivity
38 mm 2 /s
Thermal Expansion
17 µm/m-K
Thermal Shock Resistance
19 points
Electrical
Electrical Conductivity: Equal Volume
20 % IACS
Electrical Conductivity: Equal Weight (Specific)
21 % IACS
Calculated
Resilience: Ultimate (Unit Rupture Work)
94 MJ/m 3
Resilience: Unit (Modulus of Resilience)
400 kJ/m 3
Stiffness to Weight: Axial
7.7 points
Stiffness to Weight: Bending
19 points
Strength to Weight: Axial
18 points
Strength to Weight: Bending
17 points
Environmental
Embodied Carbon
10 kg CO 2 /kg material
Embodied Energy
160 MJ/kg
Embodied Energy
160 MJ/kg 68 x 10 3 BTU/lb
Embodied Water
310 L/kg
Embodied Water
310 L/kg 37 gal/lb
Registered Designations & Aliases
Alloy 20CC82500UNS C82500 (Alloy 20C) Beryllium Copper