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S21640 Stainless Steel vs. AWS ENiCrMo-10

S21640 stainless steel belongs to the iron alloys classification, while AWS ENiCrMo-10 belongs to the nickel alloys. They have a modest 30% 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 S21640 stainless steel and the bottom bar is AWS ENiCrMo-10.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
220
Elongation at Break, % 46
28
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 78
84
Tensile Strength: Ultimate (UTS), MPa 740
710

Thermal Properties

Latent Heat of Fusion, J/g 290
320
Melting Completion (Liquidus), °C 1430
1550
Melting Onset (Solidus), °C 1380
1490
Specific Heat Capacity, J/kg-K 480
420
Thermal Conductivity, W/m-K 15
10
Thermal Expansion, µm/m-K 17
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.4
1.5
Electrical Conductivity: Equal Weight (Specific), % IACS 2.8
1.5

Otherwise Unclassified Properties

Base Metal Price, % relative 17
70
Density, g/cm3 7.7
8.9
Embodied Carbon, kg CO2/kg material 3.6
12
Embodied Energy, MJ/kg 51
160
Embodied Water, L/kg 150
300

Common Calculations

Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
23
Strength to Weight: Axial, points 27
22
Strength to Weight: Bending, points 23
20
Thermal Diffusivity, mm2/s 4.0
2.7
Thermal Shock Resistance, points 16
19

Alloy Composition

Carbon (C), % 0 to 0.080
0 to 0.020
Chromium (Cr), % 17.5 to 19.5
20 to 22.5
Cobalt (Co), % 0
0 to 2.5
Copper (Cu), % 0
0 to 0.5
Iron (Fe), % 63 to 74.3
2.0 to 6.0
Manganese (Mn), % 3.5 to 6.5
0 to 1.0
Molybdenum (Mo), % 0.5 to 2.0
12.5 to 14.5
Nickel (Ni), % 4.0 to 6.5
48.4 to 63
Niobium (Nb), % 0.1 to 1.0
0
Nitrogen (N), % 0.080 to 0.3
0
Phosphorus (P), % 0 to 0.060
0 to 0.030
Silicon (Si), % 0 to 1.0
0 to 0.2
Sulfur (S), % 0 to 0.030
0 to 0.015
Tungsten (W), % 0
2.5 to 3.5
Vanadium (V), % 0
0 to 0.35
Residuals, % 0
0 to 0.5