UNS C18900 Silicon Copper
Copper Alloys
O60 (soft annealed)
Property Overview
Density8.9g/cm³
Elastic Modulus120GPa
Tensile Strength260MPa
Yield Strength67MPa
Brinell HardnessUnknown
Maximum Service Temperature200°C
Chemical Composition
MN
0.1 to 0.3%
SI
0.15 to 0.4%
P
0 to 0.050%
CU
97.7 to 99.15%
AL
0 to 0.010%
PB
0 to 0.020%
RES.
Residuals res. | | 0 to 0.5%
RESIDUALS RES.
0 to 0.5%
SN
0.6 to 0.9%
ZN
0 to 0.1%
Mechanical
Elastic (Young's, Tensile) Modulus
120 GPa
Elongation at Break
48 %
Poisson's Ratio
0.34
Shear Modulus
43 GPa
Shear Strength
190 MPa
Tensile Strength: Ultimate (UTS)
260 MPa
Tensile Strength: Yield (Proof)
67 MPa
Physical
Density
8.9 g/cm 3
Thermal
Latent Heat of Fusion
210 J/g
Maximum Temperature: Mechanical
200 °C
Melting Completion (Liquidus)
1080 °C
Melting Onset (Solidus)
1020 °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
9.3 points
Electrical
Electrical Conductivity: Equal Volume
30 % IACS
Electrical Conductivity: Equal Weight (Specific)
30 % IACS
Calculated
Resilience: Ultimate (Unit Rupture Work)
95 MJ/m 3
Resilience: Unit (Modulus of Resilience)
20 kJ/m 3
Stiffness to Weight: Axial
7.2 points
Stiffness to Weight: Bending
18 points
Strength to Weight: Axial
8.2 points
Strength to Weight: Bending
10 points
Environmental
Base Metal Price
31 % relative
Embodied Carbon
2.7 kg CO 2 /kg material
Embodied Energy
42 MJ/kg
Embodied Energy
42 MJ/kg 18 x 10 3 BTU/lb
Embodied Water
310 L/kg
Embodied Water
310 L/kg 37 gal/lb
Registered Designations & Aliases
C18900UNS C18900 Silicon Copper