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C66700 Brass vs. C74500 Nickel Silver

Both C66700 brass and C74500 nickel silver are copper alloys. They have 90% of their average alloy composition in common.

For each property being compared, the top bar is C66700 brass and the bottom bar is C74500 nickel silver.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 110
120
Elongation at Break, % 2.0 to 58
3.0 to 24
Poisson's Ratio 0.31
0.32
Rockwell B Hardness 57 to 93
66 to 94
Rockwell Superficial 30T Hardness 30 to 90
60 to 79
Shear Modulus, GPa 41
44
Shear Strength, MPa 250 to 530
310 to 380
Tensile Strength: Ultimate (UTS), MPa 340 to 690
390 to 700
Tensile Strength: Yield (Proof), MPa 100 to 640
380 to 600

Thermal Properties

Latent Heat of Fusion, J/g 180
190
Maximum Temperature: Mechanical, °C 140
170
Melting Completion (Liquidus), °C 1090
1020
Melting Onset (Solidus), °C 1050
970
Specific Heat Capacity, J/kg-K 390
390
Thermal Conductivity, W/m-K 97
45
Thermal Expansion, µm/m-K 20
19

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 17
9.0
Electrical Conductivity: Equal Weight (Specific), % IACS 19
9.7

Otherwise Unclassified Properties

Base Metal Price, % relative 25
29
Density, g/cm3 8.2
8.3
Embodied Carbon, kg CO2/kg material 2.7
3.4
Embodied Energy, MJ/kg 45
54
Embodied Water, L/kg 320
310

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 13 to 150
12 to 160
Resilience: Unit (Modulus of Resilience), kJ/m3 49 to 1900
620 to 1540
Stiffness to Weight: Axial, points 7.3
7.7
Stiffness to Weight: Bending, points 19
19
Strength to Weight: Axial, points 11 to 23
13 to 23
Strength to Weight: Bending, points 13 to 21
14 to 21
Thermal Diffusivity, mm2/s 30
14
Thermal Shock Resistance, points 11 to 23
13 to 23

Alloy Composition

Copper (Cu), % 68.5 to 71.5
63.5 to 66.5
Iron (Fe), % 0 to 0.1
0 to 0.25
Lead (Pb), % 0 to 0.070
0 to 0.1
Manganese (Mn), % 0.8 to 1.5
0 to 0.5
Nickel (Ni), % 0
9.0 to 11
Zinc (Zn), % 26.3 to 30.7
21.2 to 27.5
Residuals, % 0
0 to 0.5

Comparable Variants