Monel K-500 vs. ASTM A387 Grade 21 Steel
Monel K-500 belongs to the nickel alloys classification, while ASTM A387 grade 21 steel belongs to the iron alloys. There are 30 material properties with values for both materials. Properties with values for just one material (4, in this case) are not shown.
For each property being compared, the top bar is Monel K-500 and the bottom bar is ASTM A387 grade 21 steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 160 | |
| 190 |
| Elongation at Break, % | 25 to 36 | |
| 21 |
| Fatigue Strength, MPa | 260 to 560 | |
| 160 to 250 |
| Poisson's Ratio | 0.32 | |
| 0.29 |
| Shear Modulus, GPa | 61 | |
| 74 |
| Shear Strength, MPa | 430 to 700 | |
| 310 to 370 |
| Tensile Strength: Ultimate (UTS), MPa | 640 to 1100 | |
| 500 to 590 |
| Tensile Strength: Yield (Proof), MPa | 310 to 880 | |
| 230 to 350 |
Thermal Properties
| Latent Heat of Fusion, J/g | 270 | |
| 260 |
| Maximum Temperature: Mechanical, °C | 900 | |
| 480 |
| Melting Completion (Liquidus), °C | 1350 | |
| 1470 |
| Melting Onset (Solidus), °C | 1320 | |
| 1430 |
| Specific Heat Capacity, J/kg-K | 440 | |
| 470 |
| Thermal Conductivity, W/m-K | 18 | |
| 41 |
| Thermal Expansion, µm/m-K | 14 | |
| 13 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 3.1 | |
| 7.6 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 3.2 | |
| 8.8 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 50 | |
| 4.1 |
| Density, g/cm3 | 8.7 | |
| 7.9 |
| Embodied Carbon, kg CO2/kg material | 8.1 | |
| 1.8 |
| Embodied Energy, MJ/kg | 120 | |
| 23 |
| Embodied Water, L/kg | 280 | |
| 62 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 180 to 260 | |
| 84 to 110 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 300 to 2420 | |
| 140 to 320 |
| Stiffness to Weight: Axial, points | 10 | |
| 13 |
| Stiffness to Weight: Bending, points | 21 | |
| 24 |
| Strength to Weight: Axial, points | 21 to 35 | |
| 18 to 21 |
| Strength to Weight: Bending, points | 19 to 27 | |
| 18 to 20 |
| Thermal Diffusivity, mm2/s | 4.8 | |
| 11 |
| Thermal Shock Resistance, points | 21 to 36 | |
| 14 to 17 |
Alloy Composition
| Aluminum (Al), % | 2.3 to 3.2 | |
| 0 |
| Carbon (C), % | 0 to 0.18 | |
| 0.050 to 0.15 |
| Chromium (Cr), % | 0 | |
| 2.8 to 3.3 |
| Copper (Cu), % | 27 to 33 | |
| 0 |
| Iron (Fe), % | 0 to 2.0 | |
| 94.4 to 96 |
| Manganese (Mn), % | 0 to 1.5 | |
| 0.3 to 0.6 |
| Molybdenum (Mo), % | 0 | |
| 0.9 to 1.1 |
| Nickel (Ni), % | 63 to 70.4 | |
| 0 |
| Phosphorus (P), % | 0 | |
| 0 to 0.025 |
| Silicon (Si), % | 0 to 0.5 | |
| 0 to 0.5 |
| Sulfur (S), % | 0 to 0.010 | |
| 0 to 0.025 |
| Titanium (Ti), % | 0.35 to 0.85 | |
| 0 |