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C69430 Brass vs. C74400 Nickel Silver

Both C69430 brass and C74400 nickel silver are copper alloys. They have 78% of their average alloy composition in common.

For each property being compared, the top bar is C69430 brass and the bottom bar is C74400 nickel silver.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 110
110
Elongation at Break, % 17
43
Poisson's Ratio 0.33
0.31
Shear Modulus, GPa 42
39
Shear Strength, MPa 350
240
Tensile Strength: Ultimate (UTS), MPa 570
350
Tensile Strength: Yield (Proof), MPa 280
120

Thermal Properties

Latent Heat of Fusion, J/g 260
180
Maximum Temperature: Mechanical, °C 170
140
Melting Completion (Liquidus), °C 920
930
Melting Onset (Solidus), °C 820
910
Specific Heat Capacity, J/kg-K 410
390
Thermal Conductivity, W/m-K 26
120
Thermal Expansion, µm/m-K 18
20

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 6.2
26
Electrical Conductivity: Equal Weight (Specific), % IACS 6.7
29

Otherwise Unclassified Properties

Base Metal Price, % relative 27
25
Density, g/cm3 8.3
8.2
Embodied Carbon, kg CO2/kg material 2.7
2.9
Embodied Energy, MJ/kg 44
48
Embodied Water, L/kg 300
320

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 80
120
Resilience: Unit (Modulus of Resilience), kJ/m3 340
63
Stiffness to Weight: Axial, points 7.4
7.4
Stiffness to Weight: Bending, points 19
19
Strength to Weight: Axial, points 19
12
Strength to Weight: Bending, points 18
14
Thermal Diffusivity, mm2/s 7.7
37
Thermal Shock Resistance, points 20
12

Alloy Composition


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Arsenic (As), % 0.030 to 0.060
0
Copper (Cu), % 80 to 83
62 to 66
Iron (Fe), % 0 to 0.2
0 to 0.050
Lead (Pb), % 0 to 0.3
0 to 0.050
Nickel (Ni), % 0
2.0 to 4.0
Silicon (Si), % 3.5 to 4.5
0
Zinc (Zn), % 11.4 to 16.5
29.6 to 36
Residuals, % 0 to 0.5
0 to 0.3