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S21640 Stainless Steel vs. Monel 400

S21640 stainless steel belongs to the iron alloys classification, while Monel 400 belongs to the nickel alloys. There are 30 material properties with values for both materials. Properties with values for just one material (5, in this case) are not shown.

For each property being compared, the top bar is S21640 stainless steel and the bottom bar is Monel 400.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
160
Elongation at Break, % 46
20 to 40
Fatigue Strength, MPa 320
230 to 290
Poisson's Ratio 0.28
0.32
Shear Modulus, GPa 78
62
Shear Strength, MPa 520
370 to 490
Tensile Strength: Ultimate (UTS), MPa 740
540 to 780
Tensile Strength: Yield (Proof), MPa 350
210 to 590

Thermal Properties

Latent Heat of Fusion, J/g 290
270
Maximum Temperature: Mechanical, °C 940
1000
Melting Completion (Liquidus), °C 1430
1350
Melting Onset (Solidus), °C 1380
1300
Specific Heat Capacity, J/kg-K 480
430
Thermal Conductivity, W/m-K 15
23
Thermal Expansion, µm/m-K 17
14

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.4
3.3
Electrical Conductivity: Equal Weight (Specific), % IACS 2.8
3.4

Otherwise Unclassified Properties

Base Metal Price, % relative 17
50
Density, g/cm3 7.7
8.9
Embodied Carbon, kg CO2/kg material 3.6
7.9
Embodied Energy, MJ/kg 51
110
Embodied Water, L/kg 150
250

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 280
140 to 180
Resilience: Unit (Modulus of Resilience), kJ/m3 300
140 to 1080
Stiffness to Weight: Axial, points 14
10
Stiffness to Weight: Bending, points 25
21
Strength to Weight: Axial, points 27
17 to 25
Strength to Weight: Bending, points 23
17 to 21
Thermal Diffusivity, mm2/s 4.0
6.1
Thermal Shock Resistance, points 16
17 to 25

Alloy Composition

Carbon (C), % 0 to 0.080
0 to 0.3
Chromium (Cr), % 17.5 to 19.5
0
Copper (Cu), % 0
28 to 34
Iron (Fe), % 63 to 74.3
0 to 2.5
Manganese (Mn), % 3.5 to 6.5
0 to 2.0
Molybdenum (Mo), % 0.5 to 2.0
0
Nickel (Ni), % 4.0 to 6.5
63 to 72
Niobium (Nb), % 0.1 to 1.0
0
Nitrogen (N), % 0.080 to 0.3
0
Phosphorus (P), % 0 to 0.060
0
Silicon (Si), % 0 to 1.0
0 to 0.5
Sulfur (S), % 0 to 0.030
0 to 0.024