ASTM A387 Grade 12 Steel vs. AISI 201 Stainless Steel
Both ASTM A387 grade 12 steel and AISI 201 stainless steel 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 (1, in this case) are not shown.
For each property being compared, the top bar is ASTM A387 grade 12 steel and the bottom bar is AISI 201 stainless steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Brinell Hardness | 140 to 160 | |
| 200 to 440 |
| Elastic (Young's, Tensile) Modulus, GPa | 190 | |
| 200 |
| Elongation at Break, % | 25 | |
| 4.6 to 51 |
| Fatigue Strength, MPa | 190 to 230 | |
| 280 to 600 |
| Poisson's Ratio | 0.29 | |
| 0.28 |
| Shear Modulus, GPa | 73 | |
| 77 |
| Shear Strength, MPa | 300 to 330 | |
| 450 to 840 |
| Tensile Strength: Ultimate (UTS), MPa | 470 to 520 | |
| 650 to 1450 |
| Tensile Strength: Yield (Proof), MPa | 260 to 310 | |
| 300 to 1080 |
Thermal Properties
| Latent Heat of Fusion, J/g | 250 | |
| 280 |
| Maximum Temperature: Mechanical, °C | 430 | |
| 880 |
| Melting Completion (Liquidus), °C | 1470 | |
| 1410 |
| Melting Onset (Solidus), °C | 1420 | |
| 1370 |
| Specific Heat Capacity, J/kg-K | 470 | |
| 480 |
| Thermal Conductivity, W/m-K | 44 | |
| 15 |
| Thermal Expansion, µm/m-K | 13 | |
| 17 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 7.2 | |
| 2.5 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 8.3 | |
| 2.9 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 2.8 | |
| 12 |
| Density, g/cm3 | 7.8 | |
| 7.7 |
| Embodied Carbon, kg CO2/kg material | 1.6 | |
| 2.6 |
| Embodied Energy, MJ/kg | 21 | |
| 38 |
| Embodied Water, L/kg | 51 | |
| 140 |
Common Calculations
| PREN (Pitting Resistance) | 2.7 | |
| 19 |
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 98 to 110 | |
| 61 to 340 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 180 to 250 | |
| 230 to 2970 |
| Stiffness to Weight: Axial, points | 13 | |
| 14 |
| Stiffness to Weight: Bending, points | 24 | |
| 25 |
| Strength to Weight: Axial, points | 16 to 18 | |
| 23 to 52 |
| Strength to Weight: Bending, points | 17 to 18 | |
| 22 to 37 |
| Thermal Diffusivity, mm2/s | 12 | |
| 4.0 |
| Thermal Shock Resistance, points | 14 to 15 | |
| 14 to 32 |
Alloy Composition
| Carbon (C), % | 0.050 to 0.17 | |
| 0 to 0.15 |
| Chromium (Cr), % | 0.8 to 1.2 | |
| 16 to 18 |
| Iron (Fe), % | 97 to 98.2 | |
| 67.5 to 75 |
| Manganese (Mn), % | 0.4 to 0.65 | |
| 5.5 to 7.5 |
| Molybdenum (Mo), % | 0.45 to 0.6 | |
| 0 |
| Nickel (Ni), % | 0 | |
| 3.5 to 5.5 |
| Nitrogen (N), % | 0 | |
| 0 to 0.25 |
| Phosphorus (P), % | 0 to 0.025 | |
| 0 to 0.060 |
| Silicon (Si), % | 0.15 to 0.4 | |
| 0 to 1.0 |
| Sulfur (S), % | 0 to 0.025 | |
| 0 to 0.030 |