AISI 431 Stainless Steel vs. AISI 204 Stainless Steel
Both AISI 431 stainless steel and AISI 204 stainless steel are iron alloys. They have a moderately high 92% of their average alloy composition in common. There are 33 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 AISI 431 stainless steel and the bottom bar is AISI 204 stainless steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Brinell Hardness | 250 | |
| 210 to 330 |
| Elastic (Young's, Tensile) Modulus, GPa | 200 | |
| 200 |
| Elongation at Break, % | 15 to 17 | |
| 23 to 39 |
| Fatigue Strength, MPa | 430 to 610 | |
| 320 to 720 |
| Poisson's Ratio | 0.28 | |
| 0.28 |
| Shear Modulus, GPa | 77 | |
| 77 |
| Shear Strength, MPa | 550 to 840 | |
| 500 to 700 |
| Tensile Strength: Ultimate (UTS), MPa | 890 to 1380 | |
| 730 to 1100 |
| Tensile Strength: Yield (Proof), MPa | 710 to 1040 | |
| 380 to 1080 |
Thermal Properties
| Latent Heat of Fusion, J/g | 280 | |
| 280 |
| Maximum Temperature: Corrosion, °C | 400 | |
| 410 |
| Maximum Temperature: Mechanical, °C | 850 | |
| 850 |
| Melting Completion (Liquidus), °C | 1510 | |
| 1410 |
| Melting Onset (Solidus), °C | 1450 | |
| 1370 |
| Specific Heat Capacity, J/kg-K | 480 | |
| 480 |
| Thermal Conductivity, W/m-K | 26 | |
| 15 |
| Thermal Expansion, µm/m-K | 12 | |
| 17 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 2.6 | |
| 2.4 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 3.0 | |
| 2.9 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 9.0 | |
| 10 |
| Density, g/cm3 | 7.7 | |
| 7.7 |
| Embodied Carbon, kg CO2/kg material | 2.2 | |
| 2.4 |
| Embodied Energy, MJ/kg | 31 | |
| 35 |
| Embodied Water, L/kg | 120 | |
| 130 |
Common Calculations
| PREN (Pitting Resistance) | 16 | |
| 20 |
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 140 to 180 | |
| 240 to 250 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 1270 to 2770 | |
| 360 to 2940 |
| Stiffness to Weight: Axial, points | 14 | |
| 14 |
| Stiffness to Weight: Bending, points | 25 | |
| 25 |
| Strength to Weight: Axial, points | 32 to 50 | |
| 27 to 40 |
| Strength to Weight: Bending, points | 27 to 36 | |
| 24 to 31 |
| Thermal Diffusivity, mm2/s | 7.0 | |
| 4.1 |
| Thermal Shock Resistance, points | 28 to 43 | |
| 16 to 24 |
Alloy Composition
| Carbon (C), % | 0 to 0.2 | |
| 0 to 0.030 |
| Chromium (Cr), % | 15 to 17 | |
| 15 to 17 |
| Iron (Fe), % | 78.2 to 83.8 | |
| 69.6 to 76.4 |
| Manganese (Mn), % | 0 to 1.0 | |
| 7.0 to 9.0 |
| Nickel (Ni), % | 1.3 to 2.5 | |
| 1.5 to 3.0 |
| Nitrogen (N), % | 0 | |
| 0.15 to 0.3 |
| Phosphorus (P), % | 0 to 0.040 | |
| 0 to 0.040 |
| Silicon (Si), % | 0 to 1.0 | |
| 0 to 1.0 |
| Sulfur (S), % | 0 to 0.030 | |
| 0 to 0.030 |