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S21640 Stainless Steel vs. Monel K-500

S21640 stainless steel belongs to the iron alloys classification, while Monel K-500 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 K-500.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
160
Elongation at Break, % 46
25 to 36
Fatigue Strength, MPa 320
260 to 560
Poisson's Ratio 0.28
0.32
Shear Modulus, GPa 78
61
Shear Strength, MPa 520
430 to 700
Tensile Strength: Ultimate (UTS), MPa 740
640 to 1100
Tensile Strength: Yield (Proof), MPa 350
310 to 880

Thermal Properties

Latent Heat of Fusion, J/g 290
270
Maximum Temperature: Mechanical, °C 940
900
Melting Completion (Liquidus), °C 1430
1350
Melting Onset (Solidus), °C 1380
1320
Specific Heat Capacity, J/kg-K 480
440
Thermal Conductivity, W/m-K 15
18
Thermal Expansion, µm/m-K 17
14

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.4
3.1
Electrical Conductivity: Equal Weight (Specific), % IACS 2.8
3.2

Otherwise Unclassified Properties

Base Metal Price, % relative 17
50
Density, g/cm3 7.7
8.7
Embodied Carbon, kg CO2/kg material 3.6
8.1
Embodied Energy, MJ/kg 51
120
Embodied Water, L/kg 150
280

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 280
180 to 260
Resilience: Unit (Modulus of Resilience), kJ/m3 300
300 to 2420
Stiffness to Weight: Axial, points 14
10
Stiffness to Weight: Bending, points 25
21
Strength to Weight: Axial, points 27
21 to 35
Strength to Weight: Bending, points 23
19 to 27
Thermal Diffusivity, mm2/s 4.0
4.8
Thermal Shock Resistance, points 16
21 to 36

Alloy Composition

Aluminum (Al), % 0
2.3 to 3.2
Carbon (C), % 0 to 0.080
0 to 0.18
Chromium (Cr), % 17.5 to 19.5
0
Copper (Cu), % 0
27 to 33
Iron (Fe), % 63 to 74.3
0 to 2.0
Manganese (Mn), % 3.5 to 6.5
0 to 1.5
Molybdenum (Mo), % 0.5 to 2.0
0
Nickel (Ni), % 4.0 to 6.5
63 to 70.4
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 0.010
Titanium (Ti), % 0
0.35 to 0.85