UNS C67000 (CW704R) Manganese Bronze
Copper Alloys
O60 (soft annealed)
Property Overview
Density7.9g/cm³
Elastic Modulus110GPa
Tensile Strength660MPa
Yield Strength350MPa
Brinell HardnessUnknown
Maximum Service Temperature160°C
Chemical Composition
MN
2.5 to 5.0%
CU
63 to 68%
AL
3.0 to 6.0%
PB
0 to 0.2%
RES.
Residuals res. | | 0 to 0.5%
RESIDUALS RES.
0 to 0.5%
SN
0 to 0.5%
ZN
21.8 to 32.5%
FE
2.0 to 4.0%
Mechanical
Elastic (Young's, Tensile) Modulus
110 GPa
Elongation at Break
11 %
Poisson's Ratio
0.31
Shear Modulus
42 GPa
Shear Strength
390 MPa
Tensile Strength: Ultimate (UTS)
660 MPa
Tensile Strength: Yield (Proof)
350 MPa
Physical
Density
7.9 g/cm 3
Thermal
Latent Heat of Fusion
190 J/g
Maximum Temperature: Mechanical
160 °C
Melting Completion (Liquidus)
900 °C
Melting Onset (Solidus)
850 °C
Specific Heat Capacity
410 J/kg-K
Thermal Conductivity
99 W/m-K
Thermal Diffusivity
30 mm 2 /s
Thermal Expansion
20 µm/m-K
Thermal Shock Resistance
21 points
Electrical
Electrical Conductivity: Equal Volume
22 % IACS
Electrical Conductivity: Equal Weight (Specific)
25 % IACS
Calculated
Resilience: Ultimate (Unit Rupture Work)
62 MJ/m 3
Resilience: Unit (Modulus of Resilience)
560 kJ/m 3
Stiffness to Weight: Axial
7.8 points
Stiffness to Weight: Bending
20 points
Strength to Weight: Axial
23 points
Strength to Weight: Bending
21 points
Environmental
Base Metal Price
23 % relative
Embodied Carbon
2.9 kg CO 2 /kg material
Embodied Energy
49 MJ/kg
Embodied Energy
49 MJ/kg 21 x 10 3 BTU/lb
Embodied Water
350 L/kg
Embodied Water
350 L/kg 42 gal/lb
Registered Designations & Aliases
C67000CW704RCW704RCuZn23Al6Mn4Fe3PbUNS C67000 (CW704R) Manganese Bronze
Standards
ASTM B138 ASTM B138: Standard Specification for Manganese Bronze Rod, Bar, and Shapes
EN 12163 EN 12163: 1998 Copper and copper alloys. Rod for general purposes
EN 12165 EN 12165: 1998 Copper and copper alloys. Wrought and unwrought forging stock
EN 12420 EN 12420: 1999 Copper and copper alloys. Forgings