EN 1.4031 Stainless Steel vs. R30556 Alloy
Both EN 1.4031 stainless steel and R30556 alloy are iron alloys. They have 44% of their average alloy composition in common.
For each property being compared, the top bar is EN 1.4031 stainless steel and the bottom bar is R30556 alloy.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 190 | |
| 210 |
| Elongation at Break, % | 11 to 13 | |
| 45 |
| Fatigue Strength, MPa | 220 to 400 | |
| 320 |
| Poisson's Ratio | 0.28 | |
| 0.28 |
| Shear Modulus, GPa | 76 | |
| 81 |
| Shear Strength, MPa | 400 to 540 | |
| 550 |
| Tensile Strength: Ultimate (UTS), MPa | 670 to 900 | |
| 780 |
| Tensile Strength: Yield (Proof), MPa | 390 to 730 | |
| 350 |
Thermal Properties
| Latent Heat of Fusion, J/g | 280 | |
| 300 |
| Maximum Temperature: Corrosion, °C | 390 | |
| 450 |
| Maximum Temperature: Mechanical, °C | 770 | |
| 1100 |
| Melting Completion (Liquidus), °C | 1440 | |
| 1420 |
| Melting Onset (Solidus), °C | 1400 | |
| 1330 |
| Specific Heat Capacity, J/kg-K | 480 | |
| 450 |
| Thermal Conductivity, W/m-K | 30 | |
| 11 |
| Thermal Expansion, µm/m-K | 11 | |
| 15 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 3.1 | |
| 1.8 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 3.7 | |
| 1.9 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 7.0 | |
| 70 |
| Density, g/cm3 | 7.7 | |
| 8.4 |
| Embodied Carbon, kg CO2/kg material | 1.9 | |
| 8.7 |
| Embodied Energy, MJ/kg | 27 | |
| 130 |
| Embodied Water, L/kg | 100 | |
| 300 |
Common Calculations
| PREN (Pitting Resistance) | 14 | |
| 40 |
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 77 to 94 | |
| 290 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 380 to 1360 | |
| 290 |
| Stiffness to Weight: Axial, points | 14 | |
| 14 |
| Stiffness to Weight: Bending, points | 25 | |
| 23 |
| Strength to Weight: Axial, points | 24 to 32 | |
| 26 |
| Strength to Weight: Bending, points | 22 to 27 | |
| 22 |
| Thermal Diffusivity, mm2/s | 8.1 | |
| 2.9 |
| Thermal Shock Resistance, points | 23 to 32 | |
| 18 |
Alloy Composition
| Aluminum (Al), % | 0 | |
| 0.1 to 0.5 |
| Boron (B), % | 0 | |
| 0 to 0.020 |
| Carbon (C), % | 0.36 to 0.42 | |
| 0.050 to 0.15 |
| Chromium (Cr), % | 12.5 to 14.5 | |
| 21 to 23 |
| Cobalt (Co), % | 0 | |
| 16 to 21 |
| Iron (Fe), % | 83 to 87.1 | |
| 20.4 to 38.2 |
| Lanthanum (La), % | 0 | |
| 0.0050 to 0.1 |
| Manganese (Mn), % | 0 to 1.0 | |
| 0.5 to 2.0 |
| Molybdenum (Mo), % | 0 | |
| 2.5 to 4.0 |
| Nickel (Ni), % | 0 | |
| 19 to 22.5 |
| Niobium (Nb), % | 0 | |
| 0 to 0.3 |
| Nitrogen (N), % | 0 | |
| 0.1 to 0.3 |
| Phosphorus (P), % | 0 to 0.040 | |
| 0 to 0.040 |
| Silicon (Si), % | 0 to 1.0 | |
| 0.2 to 0.8 |
| Sulfur (S), % | 0 to 0.015 | |
| 0 to 0.015 |
| Tantalum (Ta), % | 0 | |
| 0.3 to 1.3 |
| Tungsten (W), % | 0 | |
| 2.0 to 3.5 |
| Zinc (Zn), % | 0 | |
| 0.0010 to 0.1 |