SAE-AISI D4 Steel vs. S20910 Stainless Steel
Both SAE-AISI D4 steel and S20910 stainless steel are iron alloys. They have 71% of their average alloy composition in common. There are 27 material properties with values for both materials. Properties with values for just one material (7, in this case) are not shown.
For each property being compared, the top bar is SAE-AISI D4 steel and the bottom bar is S20910 stainless steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 190 | |
| 200 |
| Elongation at Break, % | 8.4 to 15 | |
| 14 to 39 |
| Fatigue Strength, MPa | 310 to 920 | |
| 310 to 460 |
| Poisson's Ratio | 0.28 | |
| 0.28 |
| Shear Modulus, GPa | 74 | |
| 79 |
| Shear Strength, MPa | 460 to 1210 | |
| 500 to 570 |
| Tensile Strength: Ultimate (UTS), MPa | 760 to 2060 | |
| 780 to 940 |
| Tensile Strength: Yield (Proof), MPa | 470 to 1540 | |
| 430 to 810 |
Thermal Properties
| Latent Heat of Fusion, J/g | 270 | |
| 300 |
| Melting Completion (Liquidus), °C | 1430 | |
| 1420 |
| Melting Onset (Solidus), °C | 1380 | |
| 1380 |
| Specific Heat Capacity, J/kg-K | 480 | |
| 480 |
| Thermal Conductivity, W/m-K | 31 | |
| 13 |
| Thermal Expansion, µm/m-K | 12 | |
| 16 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 8.0 | |
| 22 |
| Density, g/cm3 | 7.7 | |
| 7.8 |
| Embodied Carbon, kg CO2/kg material | 3.3 | |
| 4.8 |
| Embodied Energy, MJ/kg | 49 | |
| 68 |
| Embodied Water, L/kg | 100 | |
| 180 |
Common Calculations
| PREN (Pitting Resistance) | 15 | |
| 34 |
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 100 to 160 | |
| 120 to 260 |
| Stiffness to Weight: Axial, points | 14 | |
| 14 |
| Stiffness to Weight: Bending, points | 25 | |
| 25 |
| Strength to Weight: Axial, points | 27 to 75 | |
| 28 to 33 |
| Strength to Weight: Bending, points | 24 to 47 | |
| 24 to 27 |
| Thermal Diffusivity, mm2/s | 8.3 | |
| 3.6 |
| Thermal Shock Resistance, points | 23 to 63 | |
| 17 to 21 |
Alloy Composition
| Carbon (C), % | 2.1 to 2.4 | |
| 0 to 0.060 |
| Chromium (Cr), % | 11 to 13 | |
| 20.5 to 23.5 |
| Copper (Cu), % | 0 to 0.25 | |
| 0 |
| Iron (Fe), % | 80.6 to 86.3 | |
| 52.1 to 62.1 |
| Manganese (Mn), % | 0 to 0.6 | |
| 4.0 to 6.0 |
| Molybdenum (Mo), % | 0.7 to 1.2 | |
| 1.5 to 3.0 |
| Nickel (Ni), % | 0 to 0.3 | |
| 11.5 to 13.5 |
| Niobium (Nb), % | 0 | |
| 0.1 to 0.3 |
| Nitrogen (N), % | 0 | |
| 0.2 to 0.4 |
| Phosphorus (P), % | 0 to 0.030 | |
| 0 to 0.040 |
| Silicon (Si), % | 0 to 0.6 | |
| 0 to 0.75 |
| Sulfur (S), % | 0 to 0.030 | |
| 0 to 0.030 |
| Vanadium (V), % | 0 to 1.0 | |
| 0.1 to 0.3 |