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ACI-ASTM CN3MN Steel vs. AWS BNi-4

ACI-ASTM CN3MN steel belongs to the iron alloys classification, while AWS BNi-4 belongs to the nickel 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 ACI-ASTM CN3MN steel and the bottom bar is AWS BNi-4.

Metric UnitsUS Customary Units

Mechanical Properties

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

Thermal Properties

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

Otherwise Unclassified Properties

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

Common Calculations

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

Alloy Composition


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