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AWS ERNiCu-7 vs. EN 1.6781 Steel

AWS ERNiCu-7 belongs to the nickel alloys classification, while EN 1.6781 steel belongs to the iron alloys. There are 24 material properties with values for both materials. Properties with values for just one material (7, in this case) are not shown.

For each property being compared, the top bar is AWS ERNiCu-7 and the bottom bar is EN 1.6781 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 160
190
Elongation at Break, % 34
17
Poisson's Ratio 0.32
0.29
Shear Modulus, GPa 61
73
Tensile Strength: Ultimate (UTS), MPa 550
830

Thermal Properties

Latent Heat of Fusion, J/g 280
260
Melting Completion (Liquidus), °C 1280
1460
Melting Onset (Solidus), °C 1240
1420
Specific Heat Capacity, J/kg-K 440
470
Thermal Conductivity, W/m-K 20
44
Thermal Expansion, µm/m-K 13
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 3.2
7.9
Electrical Conductivity: Equal Weight (Specific), % IACS 3.3
9.1

Otherwise Unclassified Properties

Base Metal Price, % relative 50
5.0
Density, g/cm3 8.7
7.9
Embodied Carbon, kg CO2/kg material 8.5
1.9
Embodied Energy, MJ/kg 120
25
Embodied Water, L/kg 250
60

Common Calculations

Stiffness to Weight: Axial, points 10
13
Stiffness to Weight: Bending, points 21
24
Strength to Weight: Axial, points 18
29
Strength to Weight: Bending, points 17
25
Thermal Diffusivity, mm2/s 5.3
12
Thermal Shock Resistance, points 19
24

Alloy Composition

Aluminum (Al), % 0 to 1.3
0
Carbon (C), % 0 to 0.15
0.15 to 0.19
Chromium (Cr), % 0
1.3 to 1.8
Copper (Cu), % 18.3 to 36.5
0
Iron (Fe), % 0 to 2.5
92.6 to 94.6
Manganese (Mn), % 0 to 4.0
0.55 to 0.8
Molybdenum (Mo), % 0
0.45 to 0.6
Nickel (Ni), % 62 to 69
3.0 to 3.5
Phosphorus (P), % 0 to 0.030
0 to 0.015
Silicon (Si), % 0 to 1.3
0 to 0.5
Sulfur (S), % 0 to 0.015
0 to 0.015
Titanium (Ti), % 1.5 to 3.0
0
Residuals, % 0 to 0.5
0