R60705 Alloy vs. ASTM A387 Grade 21 Steel
R60705 alloy belongs to the otherwise unclassified metals classification, while ASTM A387 grade 21 steel belongs to the iron alloys. There are 21 material properties with values for both materials. Properties with values for just one material (11, in this case) are not shown.
For each property being compared, the top bar is R60705 alloy and the bottom bar is ASTM A387 grade 21 steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 98 | |
| 190 |
| Elongation at Break, % | 18 | |
| 21 |
| Fatigue Strength, MPa | 290 | |
| 160 to 250 |
| Poisson's Ratio | 0.34 | |
| 0.29 |
| Shear Modulus, GPa | 37 | |
| 74 |
| Tensile Strength: Ultimate (UTS), MPa | 540 | |
| 500 to 590 |
| Tensile Strength: Yield (Proof), MPa | 430 | |
| 230 to 350 |
Thermal Properties
| Latent Heat of Fusion, J/g | 250 | |
| 260 |
| Specific Heat Capacity, J/kg-K | 270 | |
| 470 |
| Thermal Conductivity, W/m-K | 17 | |
| 41 |
| Thermal Expansion, µm/m-K | 6.3 | |
| 13 |
Otherwise Unclassified Properties
| Density, g/cm3 | 6.7 | |
| 7.9 |
| Embodied Water, L/kg | 450 | |
| 62 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 90 | |
| 84 to 110 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 950 | |
| 140 to 320 |
| Stiffness to Weight: Axial, points | 8.1 | |
| 13 |
| Stiffness to Weight: Bending, points | 23 | |
| 24 |
| Strength to Weight: Axial, points | 22 | |
| 18 to 21 |
| Strength to Weight: Bending, points | 22 | |
| 18 to 20 |
| Thermal Diffusivity, mm2/s | 9.5 | |
| 11 |
| Thermal Shock Resistance, points | 63 | |
| 14 to 17 |
Alloy Composition
| Carbon (C), % | 0 to 0.050 | |
| 0.050 to 0.15 |
| Chromium (Cr), % | 0 to 0.2 | |
| 2.8 to 3.3 |
| Hafnium (Hf), % | 0 to 4.5 | |
| 0 |
| Hydrogen (H), % | 0 to 0.0050 | |
| 0 |
| Iron (Fe), % | 0 to 0.2 | |
| 94.4 to 96 |
| Manganese (Mn), % | 0 | |
| 0.3 to 0.6 |
| Molybdenum (Mo), % | 0 | |
| 0.9 to 1.1 |
| Niobium (Nb), % | 2.0 to 3.0 | |
| 0 |
| Nitrogen (N), % | 0 to 0.025 | |
| 0 |
| Oxygen (O), % | 0 to 0.18 | |
| 0 |
| Phosphorus (P), % | 0 | |
| 0 to 0.025 |
| Silicon (Si), % | 0 | |
| 0 to 0.5 |
| Sulfur (S), % | 0 | |
| 0 to 0.025 |
| Zirconium (Zr), % | 91 to 98 | |
| 0 |