ASTM A387 Grade 91 Class 2 vs. AISI 301L Stainless Steel
Both ASTM A387 grade 91 class 2 and AISI 301L stainless steel are iron alloys. They have 84% of their average alloy composition in common. There are 32 material properties with values for both materials. Properties with values for just one material (1, in this case) are not shown.
For each property being compared, the top bar is ASTM A387 grade 91 class 2 and the bottom bar is AISI 301L stainless steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Brinell Hardness | 200 | |
| 210 to 320 |
| Elastic (Young's, Tensile) Modulus, GPa | 190 | |
| 200 |
| Elongation at Break, % | 20 | |
| 22 to 50 |
| Fatigue Strength, MPa | 330 | |
| 240 to 530 |
| Poisson's Ratio | 0.28 | |
| 0.28 |
| Shear Modulus, GPa | 75 | |
| 77 |
| Shear Strength, MPa | 420 | |
| 440 to 660 |
| Tensile Strength: Ultimate (UTS), MPa | 670 | |
| 620 to 1040 |
| Tensile Strength: Yield (Proof), MPa | 470 | |
| 250 to 790 |
Thermal Properties
| Latent Heat of Fusion, J/g | 270 | |
| 280 |
| Maximum Temperature: Mechanical, °C | 600 | |
| 890 |
| Melting Completion (Liquidus), °C | 1460 | |
| 1430 |
| Melting Onset (Solidus), °C | 1420 | |
| 1390 |
| Specific Heat Capacity, J/kg-K | 470 | |
| 480 |
| Thermal Conductivity, W/m-K | 26 | |
| 15 |
| Thermal Expansion, µm/m-K | 13 | |
| 16 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 8.9 | |
| 2.3 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 10 | |
| 2.7 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 7.0 | |
| 13 |
| Density, g/cm3 | 7.8 | |
| 7.8 |
| Embodied Carbon, kg CO2/kg material | 2.6 | |
| 2.7 |
| Embodied Energy, MJ/kg | 37 | |
| 39 |
| Embodied Water, L/kg | 88 | |
| 130 |
Common Calculations
| PREN (Pitting Resistance) | 13 | |
| 19 |
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 120 | |
| 210 to 300 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 580 | |
| 160 to 1580 |
| Stiffness to Weight: Axial, points | 14 | |
| 14 |
| Stiffness to Weight: Bending, points | 25 | |
| 25 |
| Strength to Weight: Axial, points | 24 | |
| 22 to 37 |
| Strength to Weight: Bending, points | 22 | |
| 21 to 29 |
| Thermal Diffusivity, mm2/s | 6.9 | |
| 4.1 |
| Thermal Shock Resistance, points | 19 | |
| 14 to 24 |
Alloy Composition
| Aluminum (Al), % | 0 to 0.020 | |
| 0 |
| Carbon (C), % | 0.080 to 0.12 | |
| 0 to 0.030 |
| Chromium (Cr), % | 8.0 to 9.5 | |
| 16 to 18 |
| Iron (Fe), % | 87.3 to 90.3 | |
| 70.7 to 78 |
| Manganese (Mn), % | 0.3 to 0.6 | |
| 0 to 2.0 |
| Molybdenum (Mo), % | 0.85 to 1.1 | |
| 0 |
| Nickel (Ni), % | 0 to 0.4 | |
| 6.0 to 8.0 |
| Niobium (Nb), % | 0.060 to 0.1 | |
| 0 |
| Nitrogen (N), % | 0.030 to 0.070 | |
| 0 to 0.2 |
| Phosphorus (P), % | 0 to 0.020 | |
| 0 to 0.045 |
| Silicon (Si), % | 0.2 to 0.5 | |
| 0 to 1.0 |
| Sulfur (S), % | 0 to 0.010 | |
| 0 to 0.030 |
| Titanium (Ti), % | 0 to 0.010 | |
| 0 |
| Vanadium (V), % | 0.18 to 0.25 | |
| 0 |
| Zirconium (Zr), % | 0 to 0.010 | |
| 0 |