EN 1.4938 Stainless Steel vs. R30556 Alloy
Both EN 1.4938 stainless steel and R30556 alloy are iron alloys. They have 46% of their average alloy composition in common.
For each property being compared, the top bar is EN 1.4938 stainless steel and the bottom bar is R30556 alloy.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 200 | |
| 210 |
| Elongation at Break, % | 16 to 17 | |
| 45 |
| Fatigue Strength, MPa | 390 to 520 | |
| 320 |
| Poisson's Ratio | 0.28 | |
| 0.28 |
| Shear Modulus, GPa | 76 | |
| 81 |
| Shear Strength, MPa | 540 to 630 | |
| 550 |
| Tensile Strength: Ultimate (UTS), MPa | 870 to 1030 | |
| 780 |
| Tensile Strength: Yield (Proof), MPa | 640 to 870 | |
| 350 |
Thermal Properties
| Latent Heat of Fusion, J/g | 270 | |
| 300 |
| Maximum Temperature: Corrosion, °C | 390 | |
| 450 |
| Maximum Temperature: Mechanical, °C | 750 | |
| 1100 |
| Melting Completion (Liquidus), °C | 1460 | |
| 1420 |
| Melting Onset (Solidus), °C | 1420 | |
| 1330 |
| Specific Heat Capacity, J/kg-K | 470 | |
| 450 |
| Thermal Conductivity, W/m-K | 30 | |
| 11 |
| Thermal Expansion, µm/m-K | 11 | |
| 15 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 2.9 | |
| 1.8 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 3.3 | |
| 1.9 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 10 | |
| 70 |
| Density, g/cm3 | 7.8 | |
| 8.4 |
| Embodied Carbon, kg CO2/kg material | 3.3 | |
| 8.7 |
| Embodied Energy, MJ/kg | 47 | |
| 130 |
| Embodied Water, L/kg | 110 | |
| 300 |
Common Calculations
| PREN (Pitting Resistance) | 18 | |
| 40 |
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 140 to 160 | |
| 290 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 1050 to 1920 | |
| 290 |
| Stiffness to Weight: Axial, points | 14 | |
| 14 |
| Stiffness to Weight: Bending, points | 25 | |
| 23 |
| Strength to Weight: Axial, points | 31 to 37 | |
| 26 |
| Strength to Weight: Bending, points | 26 to 29 | |
| 22 |
| Thermal Diffusivity, mm2/s | 8.1 | |
| 2.9 |
| Thermal Shock Resistance, points | 30 to 35 | |
| 18 |
Alloy Composition
| Aluminum (Al), % | 0 | |
| 0.1 to 0.5 |
| Boron (B), % | 0 | |
| 0 to 0.020 |
| Carbon (C), % | 0.080 to 0.15 | |
| 0.050 to 0.15 |
| Chromium (Cr), % | 11 to 12.5 | |
| 21 to 23 |
| Cobalt (Co), % | 0 | |
| 16 to 21 |
| Iron (Fe), % | 80.5 to 84.8 | |
| 20.4 to 38.2 |
| Lanthanum (La), % | 0 | |
| 0.0050 to 0.1 |
| Manganese (Mn), % | 0.4 to 0.9 | |
| 0.5 to 2.0 |
| Molybdenum (Mo), % | 1.5 to 2.0 | |
| 2.5 to 4.0 |
| Nickel (Ni), % | 2.0 to 3.0 | |
| 19 to 22.5 |
| Niobium (Nb), % | 0 | |
| 0 to 0.3 |
| Nitrogen (N), % | 0.020 to 0.040 | |
| 0.1 to 0.3 |
| Phosphorus (P), % | 0 to 0.025 | |
| 0 to 0.040 |
| Silicon (Si), % | 0 to 0.5 | |
| 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 |
| Vanadium (V), % | 0.25 to 0.4 | |
| 0 |
| Zinc (Zn), % | 0 | |
| 0.0010 to 0.1 |