UNS C91100 (Alloy B) Gear Bronze
Bronze
Property Overview
Density8.7g/cm³
Elastic Modulus100GPa
Tensile Strength240MPa
Yield Strength170MPa
Brinell HardnessUnknown
Maximum Service Temperature160°C
Chemical Composition
NI
0 to 0.5%
SI
0 to 0.0050%
P
0 to 1.0%
S
0 to 0.050%
CU
82 to 85%
AL
0 to 0.0050%
PB
0 to 0.25%
SB
0 to 0.2%
SN
15 to 17%
ZN
0 to 0.25%
FE
0 to 0.25%
Mechanical
Compressive (Crushing) Strength
140 MPa
Elastic (Young's, Tensile) Modulus
100 GPa
Elongation at Break
2.0 %
Poisson's Ratio
0.34
Shear Modulus
39 GPa
Tensile Strength: Ultimate (UTS)
240 MPa
Tensile Strength: Yield (Proof)
170 MPa
Physical
Density
8.7 g/cm 3
Thermal
Latent Heat of Fusion
180 J/g
Maximum Temperature: Mechanical
160 °C
Melting Completion (Liquidus)
950 °C
Melting Onset (Solidus)
820 °C
Specific Heat Capacity
360 J/kg-K
Thermal Conductivity
63 W/m-K
Thermal Diffusivity
20 mm 2 /s
Thermal Expansion
18 µm/m-K
Thermal Shock Resistance
9.1 points
Electrical
Electrical Conductivity: Equal Volume
8.0 % IACS
Electrical Conductivity: Equal Weight (Specific)
8.3 % IACS
Calculated
Resilience: Ultimate (Unit Rupture Work)
4.4 MJ/m 3
Resilience: Unit (Modulus of Resilience)
140 kJ/m 3
Stiffness to Weight: Axial
6.7 points
Stiffness to Weight: Bending
18 points
Strength to Weight: Axial
7.7 points
Strength to Weight: Bending
9.9 points
Environmental
Base Metal Price
38 % relative
Embodied Carbon
4.2 kg CO 2 /kg material
Embodied Energy
69 MJ/kg
Embodied Energy
69 MJ/kg 30 x 10 3 BTU/lb
Embodied Water
440 L/kg
Embodied Water
440 L/kg 52 gal/lb
Registered Designations & Aliases
Alloy BC91100UNS C91100 (Alloy B) Gear Bronze
Standards
ASTM B22 ASTM B22: Standard Specification for Bronze Castings for Bridges and Turntables