S46500 Stainless Steel vs. ASTM A387 Grade 21 Steel
Both S46500 stainless steel and ASTM A387 grade 21 steel are iron alloys. They have 79% of their average alloy composition in common. There are 26 material properties with values for both materials. Properties with values for just one material (8, in this case) are not shown.
For each property being compared, the top bar is S46500 stainless steel and the bottom bar is ASTM A387 grade 21 steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 190 | |
| 190 |
| Elongation at Break, % | 2.3 to 14 | |
| 21 |
| Fatigue Strength, MPa | 550 to 890 | |
| 160 to 250 |
| Poisson's Ratio | 0.28 | |
| 0.29 |
| Shear Modulus, GPa | 75 | |
| 74 |
| Shear Strength, MPa | 730 to 1120 | |
| 310 to 370 |
| Tensile Strength: Ultimate (UTS), MPa | 1260 to 1930 | |
| 500 to 590 |
| Tensile Strength: Yield (Proof), MPa | 1120 to 1810 | |
| 230 to 350 |
Thermal Properties
| Latent Heat of Fusion, J/g | 280 | |
| 260 |
| Maximum Temperature: Mechanical, °C | 780 | |
| 480 |
| Melting Completion (Liquidus), °C | 1450 | |
| 1470 |
| Melting Onset (Solidus), °C | 1410 | |
| 1430 |
| Specific Heat Capacity, J/kg-K | 470 | |
| 470 |
| Thermal Expansion, µm/m-K | 11 | |
| 13 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 15 | |
| 4.1 |
| Density, g/cm3 | 7.9 | |
| 7.9 |
| Embodied Carbon, kg CO2/kg material | 3.6 | |
| 1.8 |
| Embodied Energy, MJ/kg | 51 | |
| 23 |
| Embodied Water, L/kg | 120 | |
| 62 |
Common Calculations
| PREN (Pitting Resistance) | 15 | |
| 6.4 |
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 43 to 210 | |
| 84 to 110 |
| Stiffness to Weight: Axial, points | 14 | |
| 13 |
| Stiffness to Weight: Bending, points | 25 | |
| 24 |
| Strength to Weight: Axial, points | 44 to 68 | |
| 18 to 21 |
| Strength to Weight: Bending, points | 33 to 44 | |
| 18 to 20 |
| Thermal Shock Resistance, points | 44 to 67 | |
| 14 to 17 |
Alloy Composition
| Carbon (C), % | 0 to 0.020 | |
| 0.050 to 0.15 |
| Chromium (Cr), % | 11 to 12.5 | |
| 2.8 to 3.3 |
| Iron (Fe), % | 72.6 to 76.1 | |
| 94.4 to 96 |
| Manganese (Mn), % | 0 to 0.25 | |
| 0.3 to 0.6 |
| Molybdenum (Mo), % | 0.75 to 1.3 | |
| 0.9 to 1.1 |
| Nickel (Ni), % | 10.7 to 11.3 | |
| 0 |
| Nitrogen (N), % | 0 to 0.010 | |
| 0 |
| Phosphorus (P), % | 0 to 0.015 | |
| 0 to 0.025 |
| Silicon (Si), % | 0 to 0.25 | |
| 0 to 0.5 |
| Sulfur (S), % | 0 to 0.010 | |
| 0 to 0.025 |
| Titanium (Ti), % | 1.5 to 1.8 | |
| 0 |