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ACI-ASTM CB7Cu-2 Steel vs. AWS BNi-8

ACI-ASTM CB7Cu-2 steel belongs to the iron alloys classification, while AWS BNi-8 belongs to the nickel alloys. There are 19 material properties with values for both materials. Properties with values for just one material (12, in this case) are not shown.

For each property being compared, the top bar is ACI-ASTM CB7Cu-2 steel and the bottom bar is AWS BNi-8.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
180
Poisson's Ratio 0.28
0.32
Shear Modulus, GPa 75
67
Tensile Strength: Ultimate (UTS), MPa 960 to 1350
570

Thermal Properties

Latent Heat of Fusion, J/g 280
390
Melting Completion (Liquidus), °C 1430
1010
Melting Onset (Solidus), °C 1380
980
Specific Heat Capacity, J/kg-K 480
480
Thermal Expansion, µm/m-K 11
13

Otherwise Unclassified Properties

Base Metal Price, % relative 13
46
Density, g/cm3 7.8
7.9
Embodied Carbon, kg CO2/kg material 2.6
8.2
Embodied Energy, MJ/kg 38
120
Embodied Water, L/kg 130
220

Common Calculations

Stiffness to Weight: Axial, points 14
12
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 34 to 48
20
Strength to Weight: Bending, points 28 to 35
19
Thermal Shock Resistance, points 32 to 45
17

Alloy Composition

Aluminum (Al), % 0
0 to 0.050
Carbon (C), % 0 to 0.070
0 to 0.060
Chromium (Cr), % 14 to 15.5
0
Cobalt (Co), % 0
0 to 0.1
Copper (Cu), % 2.5 to 3.2
4.0 to 5.0
Iron (Fe), % 73.6 to 79
0
Manganese (Mn), % 0 to 0.7
21.5 to 24.5
Nickel (Ni), % 4.5 to 5.5
61.6 to 68.5
Niobium (Nb), % 0 to 0.35
0
Nitrogen (N), % 0 to 0.050
0
Phosphorus (P), % 0 to 0.035
0 to 0.020
Selenium (Se), % 0
0 to 0.0050
Silicon (Si), % 0 to 1.0
6.0 to 8.0
Sulfur (S), % 0 to 0.030
0 to 0.020
Titanium (Ti), % 0
0 to 0.050
Zirconium (Zr), % 0
0 to 0.050
Residuals, % 0
0 to 0.5