S35500 Stainless Steel vs. ASTM A387 Grade 21 Steel
Both S35500 stainless steel and ASTM A387 grade 21 steel are iron alloys. They have 80% of their average alloy composition in common. There are 31 material properties with values for both materials. Properties with values for just one material (3, in this case) are not shown.
For each property being compared, the top bar is S35500 stainless steel and the bottom bar is ASTM A387 grade 21 steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 200 | |
| 190 |
| Elongation at Break, % | 14 | |
| 21 |
| Fatigue Strength, MPa | 690 to 730 | |
| 160 to 250 |
| Poisson's Ratio | 0.28 | |
| 0.29 |
| Shear Modulus, GPa | 78 | |
| 74 |
| Shear Strength, MPa | 810 to 910 | |
| 310 to 370 |
| Tensile Strength: Ultimate (UTS), MPa | 1330 to 1490 | |
| 500 to 590 |
| Tensile Strength: Yield (Proof), MPa | 1200 to 1280 | |
| 230 to 350 |
Thermal Properties
| Latent Heat of Fusion, J/g | 280 | |
| 260 |
| Maximum Temperature: Mechanical, °C | 870 | |
| 480 |
| Melting Completion (Liquidus), °C | 1460 | |
| 1470 |
| Melting Onset (Solidus), °C | 1420 | |
| 1430 |
| Specific Heat Capacity, J/kg-K | 470 | |
| 470 |
| Thermal Conductivity, W/m-K | 16 | |
| 41 |
| Thermal Expansion, µm/m-K | 11 | |
| 13 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 2.2 | |
| 7.6 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 2.5 | |
| 8.8 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 16 | |
| 4.1 |
| Density, g/cm3 | 7.8 | |
| 7.9 |
| Embodied Carbon, kg CO2/kg material | 3.5 | |
| 1.8 |
| Embodied Energy, MJ/kg | 47 | |
| 23 |
| Embodied Water, L/kg | 130 | |
| 62 |
Common Calculations
| PREN (Pitting Resistance) | 27 | |
| 6.4 |
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 180 to 190 | |
| 84 to 110 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 3610 to 4100 | |
| 140 to 320 |
| Stiffness to Weight: Axial, points | 14 | |
| 13 |
| Stiffness to Weight: Bending, points | 25 | |
| 24 |
| Strength to Weight: Axial, points | 47 to 53 | |
| 18 to 21 |
| Strength to Weight: Bending, points | 34 to 37 | |
| 18 to 20 |
| Thermal Diffusivity, mm2/s | 4.4 | |
| 11 |
| Thermal Shock Resistance, points | 44 to 49 | |
| 14 to 17 |
Alloy Composition
| Carbon (C), % | 0.1 to 0.15 | |
| 0.050 to 0.15 |
| Chromium (Cr), % | 15 to 16 | |
| 2.8 to 3.3 |
| Iron (Fe), % | 73.2 to 77.7 | |
| 94.4 to 96 |
| Manganese (Mn), % | 0.5 to 1.3 | |
| 0.3 to 0.6 |
| Molybdenum (Mo), % | 2.5 to 3.2 | |
| 0.9 to 1.1 |
| Nickel (Ni), % | 4.0 to 5.0 | |
| 0 |
| Niobium (Nb), % | 0.1 to 0.5 | |
| 0 |
| Nitrogen (N), % | 0.070 to 0.13 | |
| 0 |
| Phosphorus (P), % | 0 to 0.040 | |
| 0 to 0.025 |
| Silicon (Si), % | 0 to 0.5 | |
| 0 to 0.5 |
| Sulfur (S), % | 0 to 0.030 | |
| 0 to 0.025 |