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C68400 Brass vs. AWS ERNiCu-7

C68400 brass belongs to the copper alloys classification, while AWS ERNiCu-7 belongs to the nickel alloys. They have a modest 30% of their average alloy composition in common, which, by itself, doesn't mean much. There are 24 material properties with values for both materials. Properties with values for just one material (6, in this case) are not shown.

For each property being compared, the top bar is C68400 brass and the bottom bar is AWS ERNiCu-7.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 110
160
Elongation at Break, % 18
34
Poisson's Ratio 0.31
0.32
Shear Modulus, GPa 41
61
Tensile Strength: Ultimate (UTS), MPa 540
550

Thermal Properties

Latent Heat of Fusion, J/g 210
280
Melting Completion (Liquidus), °C 840
1280
Melting Onset (Solidus), °C 820
1240
Specific Heat Capacity, J/kg-K 400
440
Thermal Conductivity, W/m-K 66
20
Thermal Expansion, µm/m-K 20
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 87
3.2
Electrical Conductivity: Equal Weight (Specific), % IACS 99
3.3

Otherwise Unclassified Properties

Base Metal Price, % relative 23
50
Density, g/cm3 7.9
8.7
Embodied Carbon, kg CO2/kg material 2.7
8.5
Embodied Energy, MJ/kg 47
120
Embodied Water, L/kg 320
250

Common Calculations

Stiffness to Weight: Axial, points 7.5
10
Stiffness to Weight: Bending, points 20
21
Strength to Weight: Axial, points 19
18
Strength to Weight: Bending, points 19
17
Thermal Diffusivity, mm2/s 21
5.3
Thermal Shock Resistance, points 18
19

Alloy Composition

Aluminum (Al), % 0 to 0.5
0 to 1.3
Boron (B), % 0.0010 to 0.030
0
Carbon (C), % 0
0 to 0.15
Copper (Cu), % 59 to 64
18.3 to 36.5
Iron (Fe), % 0 to 1.0
0 to 2.5
Lead (Pb), % 0 to 0.090
0
Manganese (Mn), % 0.2 to 1.5
0 to 4.0
Nickel (Ni), % 0 to 0.5
62 to 69
Phosphorus (P), % 0.030 to 0.3
0 to 0.030
Silicon (Si), % 1.5 to 2.5
0 to 1.3
Sulfur (S), % 0
0 to 0.015
Tin (Sn), % 0 to 0.5
0
Titanium (Ti), % 0
1.5 to 3.0
Zinc (Zn), % 28.6 to 39.3
0
Residuals, % 0
0 to 0.5