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Monel K-500 vs. ASTM A231 Spring Steel

Monel K-500 belongs to the nickel alloys classification, while ASTM A231 spring steel belongs to the iron alloys. There are 29 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 ASTM A231 spring steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 160
190
Elongation at Break, % 25 to 36
14
Fatigue Strength, MPa 260 to 560
1000
Poisson's Ratio 0.32
0.29
Shear Modulus, GPa 61
73
Shear Strength, MPa 430 to 700
1080
Tensile Strength: Ultimate (UTS), MPa 640 to 1100
1790
Tensile Strength: Yield (Proof), MPa 310 to 880
1570

Thermal Properties

Latent Heat of Fusion, J/g 270
250
Maximum Temperature: Mechanical, °C 900
420
Melting Completion (Liquidus), °C 1350
1460
Melting Onset (Solidus), °C 1320
1410
Specific Heat Capacity, J/kg-K 440
470
Thermal Conductivity, W/m-K 18
52
Thermal Expansion, µm/m-K 14
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 3.1
7.3
Electrical Conductivity: Equal Weight (Specific), % IACS 3.2
8.4

Otherwise Unclassified Properties

Base Metal Price, % relative 50
2.3
Density, g/cm3 8.7
7.8
Embodied Carbon, kg CO2/kg material 8.1
2.0
Embodied Energy, MJ/kg 120
28
Embodied Water, L/kg 280
51

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 180 to 260
230
Stiffness to Weight: Axial, points 10
13
Stiffness to Weight: Bending, points 21
24
Strength to Weight: Axial, points 21 to 35
64
Strength to Weight: Bending, points 19 to 27
42
Thermal Diffusivity, mm2/s 4.8
14
Thermal Shock Resistance, points 21 to 36
53

Alloy Composition

Aluminum (Al), % 2.3 to 3.2
0
Carbon (C), % 0 to 0.18
0.48 to 0.53
Chromium (Cr), % 0
0.8 to 1.1
Copper (Cu), % 27 to 33
0
Iron (Fe), % 0 to 2.0
96.7 to 97.7
Manganese (Mn), % 0 to 1.5
0.7 to 0.9
Nickel (Ni), % 63 to 70.4
0
Phosphorus (P), % 0
0 to 0.040
Silicon (Si), % 0 to 0.5
0.15 to 0.35
Sulfur (S), % 0 to 0.010
0 to 0.040
Titanium (Ti), % 0.35 to 0.85
0
Vanadium (V), % 0
0.15 to 0.3