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AWS ERNi-1 vs. S21904 Stainless Steel

AWS ERNi-1 belongs to the nickel alloys classification, while S21904 stainless steel belongs to the iron alloys. 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 ERNi-1 and the bottom bar is S21904 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 180
200
Elongation at Break, % 22
17 to 51
Poisson's Ratio 0.31
0.28
Shear Modulus, GPa 69
78
Tensile Strength: Ultimate (UTS), MPa 470
700 to 1000

Thermal Properties

Latent Heat of Fusion, J/g 300
290
Melting Completion (Liquidus), °C 1360
1400
Melting Onset (Solidus), °C 1310
1350
Specific Heat Capacity, J/kg-K 450
480
Thermal Conductivity, W/m-K 73
14
Thermal Expansion, µm/m-K 11
17

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 19
2.5
Electrical Conductivity: Equal Weight (Specific), % IACS 19
2.9

Otherwise Unclassified Properties

Base Metal Price, % relative 60
15
Density, g/cm3 8.7
7.7
Embodied Carbon, kg CO2/kg material 11
3.0
Embodied Energy, MJ/kg 150
43
Embodied Water, L/kg 230
160

Common Calculations

Stiffness to Weight: Axial, points 12
14
Stiffness to Weight: Bending, points 22
25
Strength to Weight: Axial, points 15
25 to 36
Strength to Weight: Bending, points 15
23 to 29
Thermal Diffusivity, mm2/s 19
3.8
Thermal Shock Resistance, points 17
15 to 21

Alloy Composition

Aluminum (Al), % 0 to 1.5
0
Carbon (C), % 0 to 0.15
0 to 0.040
Chromium (Cr), % 0
19 to 21.5
Copper (Cu), % 0 to 0.25
0
Iron (Fe), % 0 to 1.0
59.5 to 67.4
Manganese (Mn), % 0 to 1.0
8.0 to 10
Nickel (Ni), % 93 to 98
5.5 to 7.5
Nitrogen (N), % 0
0.15 to 0.4
Phosphorus (P), % 0 to 0.030
0 to 0.045
Silicon (Si), % 0 to 0.75
0 to 1.0
Sulfur (S), % 0 to 0.015
0 to 0.030
Titanium (Ti), % 2.0 to 3.5
0
Residuals, % 0 to 0.5
0