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AWS ERNiCu-7 vs. EN 1.4458 Stainless Steel

AWS ERNiCu-7 belongs to the nickel alloys classification, while EN 1.4458 stainless steel belongs to the iron alloys. They have a modest 32% 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 (9, in this case) are not shown.

For each property being compared, the top bar is AWS ERNiCu-7 and the bottom bar is EN 1.4458 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 160
200
Elongation at Break, % 34
34
Poisson's Ratio 0.32
0.28
Shear Modulus, GPa 61
78
Tensile Strength: Ultimate (UTS), MPa 550
510

Thermal Properties

Latent Heat of Fusion, J/g 280
300
Melting Completion (Liquidus), °C 1280
1420
Melting Onset (Solidus), °C 1240
1370
Specific Heat Capacity, J/kg-K 440
470
Thermal Conductivity, W/m-K 20
16
Thermal Expansion, µm/m-K 13
15

Electrical Properties

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

Otherwise Unclassified Properties

Base Metal Price, % relative 50
30
Density, g/cm3 8.7
8.0
Embodied Carbon, kg CO2/kg material 8.5
5.4
Embodied Energy, MJ/kg 120
75
Embodied Water, L/kg 250
200

Common Calculations

Stiffness to Weight: Axial, points 10
14
Stiffness to Weight: Bending, points 21
24
Strength to Weight: Axial, points 18
17
Strength to Weight: Bending, points 17
18
Thermal Diffusivity, mm2/s 5.3
4.2
Thermal Shock Resistance, points 19
12

Alloy Composition

Aluminum (Al), % 0 to 1.3
0
Carbon (C), % 0 to 0.15
0 to 0.030
Chromium (Cr), % 0
19 to 22
Copper (Cu), % 18.3 to 36.5
0 to 2.0
Iron (Fe), % 0 to 2.5
40.2 to 53
Manganese (Mn), % 0 to 4.0
0 to 2.0
Molybdenum (Mo), % 0
2.0 to 2.5
Nickel (Ni), % 62 to 69
26 to 30
Nitrogen (N), % 0
0 to 0.2
Phosphorus (P), % 0 to 0.030
0 to 0.035
Silicon (Si), % 0 to 1.3
0 to 1.0
Sulfur (S), % 0 to 0.015
0 to 0.025
Titanium (Ti), % 1.5 to 3.0
0
Residuals, % 0 to 0.5
0