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Monel K-500 vs. S31655 Stainless Steel

Monel K-500 belongs to the nickel alloys classification, while S31655 stainless steel belongs to the iron alloys. There are 30 material properties with values for both materials. Properties with values for just one material (6, in this case) are not shown.

For each property being compared, the top bar is Monel K-500 and the bottom bar is S31655 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 160
200
Elongation at Break, % 25 to 36
39
Fatigue Strength, MPa 260 to 560
300
Poisson's Ratio 0.32
0.28
Shear Modulus, GPa 61
78
Shear Strength, MPa 430 to 700
490
Tensile Strength: Ultimate (UTS), MPa 640 to 1100
710
Tensile Strength: Yield (Proof), MPa 310 to 880
350

Thermal Properties

Latent Heat of Fusion, J/g 270
290
Maximum Temperature: Mechanical, °C 900
1010
Melting Completion (Liquidus), °C 1350
1430
Melting Onset (Solidus), °C 1320
1380
Specific Heat Capacity, J/kg-K 440
480
Thermal Conductivity, W/m-K 18
15
Thermal Expansion, µm/m-K 14
16

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 3.1
2.4
Electrical Conductivity: Equal Weight (Specific), % IACS 3.2
2.7

Otherwise Unclassified Properties

Base Metal Price, % relative 50
17
Density, g/cm3 8.7
7.8
Embodied Carbon, kg CO2/kg material 8.1
3.3
Embodied Energy, MJ/kg 120
46
Embodied Water, L/kg 280
160

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 180 to 260
230
Resilience: Unit (Modulus of Resilience), kJ/m3 300 to 2420
310
Stiffness to Weight: Axial, points 10
14
Stiffness to Weight: Bending, points 21
25
Strength to Weight: Axial, points 21 to 35
25
Strength to Weight: Bending, points 19 to 27
23
Thermal Diffusivity, mm2/s 4.8
4.0
Thermal Shock Resistance, points 21 to 36
16

Alloy Composition

Aluminum (Al), % 2.3 to 3.2
0
Carbon (C), % 0 to 0.18
0 to 0.030
Chromium (Cr), % 0
19.5 to 21.5
Copper (Cu), % 27 to 33
0 to 1.0
Iron (Fe), % 0 to 2.0
63.2 to 71.9
Manganese (Mn), % 0 to 1.5
0 to 2.0
Molybdenum (Mo), % 0
0.5 to 1.5
Nickel (Ni), % 63 to 70.4
8.0 to 9.5
Nitrogen (N), % 0
0.14 to 0.25
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 0.015
Titanium (Ti), % 0.35 to 0.85
0