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Monel K-500 vs. S21904 Stainless Steel

Monel K-500 belongs to the nickel alloys classification, while S21904 stainless steel belongs to the iron 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 Monel K-500 and the bottom bar is S21904 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 160
200
Elongation at Break, % 25 to 36
17 to 51
Fatigue Strength, MPa 260 to 560
380 to 550
Poisson's Ratio 0.32
0.28
Shear Modulus, GPa 61
78
Shear Strength, MPa 430 to 700
510 to 620
Tensile Strength: Ultimate (UTS), MPa 640 to 1100
700 to 1000
Tensile Strength: Yield (Proof), MPa 310 to 880
390 to 910

Thermal Properties

Latent Heat of Fusion, J/g 270
290
Maximum Temperature: Mechanical, °C 900
980
Melting Completion (Liquidus), °C 1350
1400
Melting Onset (Solidus), °C 1320
1350
Specific Heat Capacity, J/kg-K 440
480
Thermal Conductivity, W/m-K 18
14
Thermal Expansion, µm/m-K 14
17

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 3.1
2.5
Electrical Conductivity: Equal Weight (Specific), % IACS 3.2
2.9

Otherwise Unclassified Properties

Base Metal Price, % relative 50
15
Density, g/cm3 8.7
7.7
Embodied Carbon, kg CO2/kg material 8.1
3.0
Embodied Energy, MJ/kg 120
43
Embodied Water, L/kg 280
160

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 180 to 260
160 to 310
Resilience: Unit (Modulus of Resilience), kJ/m3 300 to 2420
380 to 2070
Stiffness to Weight: Axial, points 10
14
Stiffness to Weight: Bending, points 21
25
Strength to Weight: Axial, points 21 to 35
25 to 36
Strength to Weight: Bending, points 19 to 27
23 to 29
Thermal Diffusivity, mm2/s 4.8
3.8
Thermal Shock Resistance, points 21 to 36
15 to 21

Alloy Composition

Aluminum (Al), % 2.3 to 3.2
0
Carbon (C), % 0 to 0.18
0 to 0.040
Chromium (Cr), % 0
19 to 21.5
Copper (Cu), % 27 to 33
0
Iron (Fe), % 0 to 2.0
59.5 to 67.4
Manganese (Mn), % 0 to 1.5
8.0 to 10
Nickel (Ni), % 63 to 70.4
5.5 to 7.5
Nitrogen (N), % 0
0.15 to 0.4
Phosphorus (P), % 0
0 to 0.045
Silicon (Si), % 0 to 0.5
0 to 1.0
Sulfur (S), % 0 to 0.010
0 to 0.030
Titanium (Ti), % 0.35 to 0.85
0

Comparable Variants