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ACI-ASTM CN3M Steel vs. AWS ERNiCu-7

ACI-ASTM CN3M steel belongs to the iron alloys classification, while AWS ERNiCu-7 belongs to the nickel alloys. They have a modest 28% 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 (8, in this case) are not shown.

For each property being compared, the top bar is ACI-ASTM CN3M steel and the bottom bar is AWS ERNiCu-7.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
160
Elongation at Break, % 34
34
Poisson's Ratio 0.28
0.32
Shear Modulus, GPa 80
61
Tensile Strength: Ultimate (UTS), MPa 500
550

Thermal Properties

Latent Heat of Fusion, J/g 310
280
Melting Completion (Liquidus), °C 1450
1280
Melting Onset (Solidus), °C 1400
1240
Specific Heat Capacity, J/kg-K 470
440
Thermal Conductivity, W/m-K 13
20
Thermal Expansion, µm/m-K 16
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 1.7
3.2
Electrical Conductivity: Equal Weight (Specific), % IACS 1.9
3.3

Otherwise Unclassified Properties

Base Metal Price, % relative 31
50
Density, g/cm3 8.1
8.7
Embodied Carbon, kg CO2/kg material 5.9
8.5
Embodied Energy, MJ/kg 80
120
Embodied Water, L/kg 200
250

Common Calculations

Stiffness to Weight: Axial, points 14
10
Stiffness to Weight: Bending, points 24
21
Strength to Weight: Axial, points 17
18
Strength to Weight: Bending, points 17
17
Thermal Diffusivity, mm2/s 3.4
5.3
Thermal Shock Resistance, points 11
19

Alloy Composition

Aluminum (Al), % 0
0 to 1.3
Carbon (C), % 0 to 0.030
0 to 0.15
Chromium (Cr), % 20 to 22
0
Copper (Cu), % 0
18.3 to 36.5
Iron (Fe), % 42.4 to 52.5
0 to 2.5
Manganese (Mn), % 0 to 2.0
0 to 4.0
Molybdenum (Mo), % 4.5 to 5.5
0
Nickel (Ni), % 23 to 27
62 to 69
Phosphorus (P), % 0 to 0.030
0 to 0.030
Silicon (Si), % 0 to 1.0
0 to 1.3
Sulfur (S), % 0 to 0.030
0 to 0.015
Titanium (Ti), % 0
1.5 to 3.0
Residuals, % 0
0 to 0.5