ASTM A387 Grade 2 Steel vs. Nickel 686
ASTM A387 grade 2 steel belongs to the iron alloys classification, while nickel 686 belongs to the nickel alloys. There are 30 material properties with values for both materials. Properties with values for just one material (2, in this case) are not shown.
For each property being compared, the top bar is ASTM A387 grade 2 steel and the bottom bar is nickel 686.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 190 | |
| 220 |
| Elongation at Break, % | 25 | |
| 51 |
| Fatigue Strength, MPa | 190 to 250 | |
| 410 |
| Poisson's Ratio | 0.29 | |
| 0.29 |
| Shear Modulus, GPa | 73 | |
| 77 |
| Shear Strength, MPa | 300 to 350 | |
| 560 |
| Tensile Strength: Ultimate (UTS), MPa | 470 to 550 | |
| 780 |
| Tensile Strength: Yield (Proof), MPa | 260 to 350 | |
| 350 |
Thermal Properties
| Latent Heat of Fusion, J/g | 250 | |
| 320 |
| Maximum Temperature: Mechanical, °C | 420 | |
| 980 |
| Melting Completion (Liquidus), °C | 1470 | |
| 1380 |
| Melting Onset (Solidus), °C | 1420 | |
| 1340 |
| Specific Heat Capacity, J/kg-K | 470 | |
| 420 |
| Thermal Conductivity, W/m-K | 45 | |
| 9.8 |
| Thermal Expansion, µm/m-K | 13 | |
| 12 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 7.2 | |
| 1.4 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 8.3 | |
| 1.4 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 2.6 | |
| 70 |
| Density, g/cm3 | 7.9 | |
| 9.0 |
| Embodied Carbon, kg CO2/kg material | 1.6 | |
| 12 |
| Embodied Energy, MJ/kg | 20 | |
| 170 |
| Embodied Water, L/kg | 50 | |
| 300 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 98 to 120 | |
| 320 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 180 to 320 | |
| 280 |
| Stiffness to Weight: Axial, points | 13 | |
| 14 |
| Stiffness to Weight: Bending, points | 24 | |
| 22 |
| Strength to Weight: Axial, points | 16 to 20 | |
| 24 |
| Strength to Weight: Bending, points | 17 to 19 | |
| 21 |
| Thermal Diffusivity, mm2/s | 12 | |
| 2.6 |
| Thermal Shock Resistance, points | 14 to 16 | |
| 21 |
Alloy Composition
| Carbon (C), % | 0.050 to 0.21 | |
| 0 to 0.010 |
| Chromium (Cr), % | 0.5 to 0.8 | |
| 19 to 23 |
| Iron (Fe), % | 97.1 to 98.3 | |
| 0 to 5.0 |
| Manganese (Mn), % | 0.55 to 0.8 | |
| 0 to 0.75 |
| Molybdenum (Mo), % | 0.45 to 0.6 | |
| 15 to 17 |
| Nickel (Ni), % | 0 | |
| 49.5 to 63 |
| Phosphorus (P), % | 0 to 0.025 | |
| 0 to 0.040 |
| Silicon (Si), % | 0.15 to 0.4 | |
| 0 to 0.080 |
| Sulfur (S), % | 0 to 0.025 | |
| 0 to 0.020 |
| Titanium (Ti), % | 0 | |
| 0.020 to 0.25 |
| Tungsten (W), % | 0 | |
| 3.0 to 4.4 |