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AWS BNi-4 vs. ACI-ASTM CN3MN Steel

AWS BNi-4 belongs to the nickel alloys classification, while ACI-ASTM CN3MN steel belongs to the iron alloys. They have a modest 26% of their average alloy composition in common, which, by itself, doesn't mean much. There are 19 material properties with values for both materials. Properties with values for just one material (14, in this case) are not shown.

For each property being compared, the top bar is AWS BNi-4 and the bottom bar is ACI-ASTM CN3MN steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 180
210
Poisson's Ratio 0.31
0.28
Shear Modulus, GPa 67
80
Tensile Strength: Ultimate (UTS), MPa 430
620

Thermal Properties

Latent Heat of Fusion, J/g 340
310
Melting Completion (Liquidus), °C 1070
1460
Melting Onset (Solidus), °C 980
1410
Specific Heat Capacity, J/kg-K 470
460
Thermal Expansion, µm/m-K 11
16

Otherwise Unclassified Properties

Base Metal Price, % relative 60
33
Density, g/cm3 8.5
8.1
Embodied Carbon, kg CO2/kg material 10
6.2
Embodied Energy, MJ/kg 140
84
Embodied Water, L/kg 220
200

Common Calculations

Stiffness to Weight: Axial, points 12
14
Stiffness to Weight: Bending, points 22
24
Strength to Weight: Axial, points 14
21
Strength to Weight: Bending, points 15
20
Thermal Shock Resistance, points 16
14

Alloy Composition

Aluminum (Al), % 0 to 0.050
0
Boron (B), % 1.5 to 2.2
0
Carbon (C), % 0 to 0.060
0 to 0.030
Chromium (Cr), % 0
20 to 22
Cobalt (Co), % 0 to 0.1
0
Copper (Cu), % 0
0 to 0.75
Iron (Fe), % 0 to 1.5
41.4 to 50.3
Manganese (Mn), % 0
0 to 2.0
Molybdenum (Mo), % 0
6.0 to 7.0
Nickel (Ni), % 91.4 to 95.5
23.5 to 25.5
Nitrogen (N), % 0
0.18 to 0.26
Phosphorus (P), % 0 to 0.020
0 to 0.040
Selenium (Se), % 0 to 0.0050
0
Silicon (Si), % 3.0 to 4.0
0 to 1.0
Sulfur (S), % 0 to 0.020
0 to 0.010
Titanium (Ti), % 0 to 0.050
0
Zirconium (Zr), % 0 to 0.050
0
Residuals, % 0 to 0.5
0