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AWS BNi-7 vs. ACI-ASTM CA6NM Steel

AWS BNi-7 belongs to the nickel alloys classification, while ACI-ASTM CA6NM steel belongs to the iron alloys. There are 19 material properties with values for both materials. Properties with values for just one material (15, in this case) are not shown.

For each property being compared, the top bar is AWS BNi-7 and the bottom bar is ACI-ASTM CA6NM steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 170
200
Poisson's Ratio 0.3
0.28
Shear Modulus, GPa 67
76
Tensile Strength: Ultimate (UTS), MPa 550
850

Thermal Properties

Latent Heat of Fusion, J/g 280
280
Melting Completion (Liquidus), °C 890
1450
Melting Onset (Solidus), °C 890
1400
Specific Heat Capacity, J/kg-K 490
480
Thermal Expansion, µm/m-K 11
10

Otherwise Unclassified Properties

Base Metal Price, % relative 55
10
Density, g/cm3 8.0
7.8
Embodied Carbon, kg CO2/kg material 8.8
2.5
Embodied Energy, MJ/kg 120
34
Embodied Water, L/kg 240
110

Common Calculations

Stiffness to Weight: Axial, points 12
14
Stiffness to Weight: Bending, points 23
25
Strength to Weight: Axial, points 19
30
Strength to Weight: Bending, points 19
26
Thermal Shock Resistance, points 21
31

Alloy Composition

Aluminum (Al), % 0 to 0.050
0
Boron (B), % 0 to 0.010
0
Carbon (C), % 0 to 0.060
0 to 0.060
Chromium (Cr), % 13 to 15
11.5 to 14
Cobalt (Co), % 0 to 0.1
0
Iron (Fe), % 0 to 0.2
78.4 to 84.6
Manganese (Mn), % 0 to 0.040
0 to 1.0
Molybdenum (Mo), % 0
0.4 to 1.0
Nickel (Ni), % 73.3 to 77.3
3.5 to 4.5
Phosphorus (P), % 9.7 to 10.5
0 to 0.040
Selenium (Se), % 0 to 0.0050
0
Silicon (Si), % 0 to 0.1
0 to 1.0
Sulfur (S), % 0 to 0.020
0 to 0.030
Titanium (Ti), % 0 to 0.050
0
Zirconium (Zr), % 0 to 0.050
0
Residuals, % 0 to 0.5
0