AISI 305 Stainless Steel vs. ASTM A387 Grade 21L Class 1
Both AISI 305 stainless steel and ASTM A387 grade 21L class 1 are iron alloys. They have 73% of their average alloy composition in common. There are 32 material properties with values for both materials. Properties with values for just one material (2, in this case) are not shown.
For each property being compared, the top bar is AISI 305 stainless steel and the bottom bar is ASTM A387 grade 21L class 1.
Metric UnitsUS Customary Units
Mechanical Properties
| Brinell Hardness | 170 to 220 | |
| 150 |
| Elastic (Young's, Tensile) Modulus, GPa | 200 | |
| 190 |
| Elongation at Break, % | 34 to 45 | |
| 21 |
| Fatigue Strength, MPa | 210 to 280 | |
| 160 |
| Poisson's Ratio | 0.28 | |
| 0.29 |
| Shear Modulus, GPa | 77 | |
| 74 |
| Shear Strength, MPa | 400 to 470 | |
| 310 |
| Tensile Strength: Ultimate (UTS), MPa | 580 to 710 | |
| 500 |
| Tensile Strength: Yield (Proof), MPa | 230 to 350 | |
| 230 |
Thermal Properties
| Latent Heat of Fusion, J/g | 290 | |
| 260 |
| Maximum Temperature: Mechanical, °C | 540 | |
| 480 |
| Melting Completion (Liquidus), °C | 1450 | |
| 1470 |
| Melting Onset (Solidus), °C | 1400 | |
| 1430 |
| Specific Heat Capacity, J/kg-K | 480 | |
| 470 |
| Thermal Conductivity, W/m-K | 16 | |
| 41 |
| Thermal Expansion, µm/m-K | 17 | |
| 13 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 2.4 | |
| 7.6 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 2.7 | |
| 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 | 3.2 | |
| 1.8 |
| Embodied Energy, MJ/kg | 45 | |
| 23 |
| Embodied Water, L/kg | 150 | |
| 62 |
Common Calculations
| PREN (Pitting Resistance) | 18 | |
| 6.4 |
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 200 to 210 | |
| 84 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 130 to 320 | |
| 140 |
| Stiffness to Weight: Axial, points | 14 | |
| 13 |
| Stiffness to Weight: Bending, points | 25 | |
| 24 |
| Strength to Weight: Axial, points | 20 to 25 | |
| 18 |
| Strength to Weight: Bending, points | 20 to 23 | |
| 18 |
| Thermal Diffusivity, mm2/s | 4.2 | |
| 11 |
| Thermal Shock Resistance, points | 13 to 15 | |
| 14 |
Alloy Composition
| Carbon (C), % | 0 to 0.12 | |
| 0 to 0.1 |
| Chromium (Cr), % | 17 to 19 | |
| 2.8 to 3.3 |
| Iron (Fe), % | 65.1 to 72.5 | |
| 94.4 to 96.1 |
| Manganese (Mn), % | 0 to 2.0 | |
| 0.3 to 0.6 |
| Molybdenum (Mo), % | 0 | |
| 0.9 to 1.1 |
| Nickel (Ni), % | 10.5 to 13 | |
| 0 |
| Phosphorus (P), % | 0 to 0.045 | |
| 0 to 0.025 |
| Silicon (Si), % | 0 to 0.75 | |
| 0 to 0.5 |
| Sulfur (S), % | 0 to 0.030 | |
| 0 to 0.025 |