AISI 347 Stainless Steel vs. AISI 431 Stainless Steel
Both AISI 347 stainless steel and AISI 431 stainless steel are iron alloys. They have 88% of their average alloy composition in common. There are 33 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 347 stainless steel and the bottom bar is AISI 431 stainless steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Brinell Hardness | 160 to 210 | |
| 250 |
| Elastic (Young's, Tensile) Modulus, GPa | 200 | |
| 200 |
| Elongation at Break, % | 34 to 46 | |
| 15 to 17 |
| Fatigue Strength, MPa | 220 to 270 | |
| 430 to 610 |
| Poisson's Ratio | 0.28 | |
| 0.28 |
| Shear Modulus, GPa | 77 | |
| 77 |
| Shear Strength, MPa | 430 to 460 | |
| 550 to 840 |
| Tensile Strength: Ultimate (UTS), MPa | 610 to 690 | |
| 890 to 1380 |
| Tensile Strength: Yield (Proof), MPa | 240 to 350 | |
| 710 to 1040 |
Thermal Properties
| Latent Heat of Fusion, J/g | 290 | |
| 280 |
| Maximum Temperature: Corrosion, °C | 480 | |
| 400 |
| Maximum Temperature: Mechanical, °C | 870 | |
| 850 |
| Melting Completion (Liquidus), °C | 1430 | |
| 1510 |
| Melting Onset (Solidus), °C | 1400 | |
| 1450 |
| Specific Heat Capacity, J/kg-K | 480 | |
| 480 |
| Thermal Conductivity, W/m-K | 16 | |
| 26 |
| Thermal Expansion, µm/m-K | 17 | |
| 12 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 2.4 | |
| 2.6 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 2.7 | |
| 3.0 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 19 | |
| 9.0 |
| Density, g/cm3 | 7.8 | |
| 7.7 |
| Embodied Carbon, kg CO2/kg material | 3.6 | |
| 2.2 |
| Embodied Energy, MJ/kg | 52 | |
| 31 |
| Embodied Water, L/kg | 150 | |
| 120 |
Common Calculations
| PREN (Pitting Resistance) | 18 | |
| 16 |
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 190 to 220 | |
| 140 to 180 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 150 to 310 | |
| 1270 to 2770 |
| Stiffness to Weight: Axial, points | 14 | |
| 14 |
| Stiffness to Weight: Bending, points | 25 | |
| 25 |
| Strength to Weight: Axial, points | 22 to 25 | |
| 32 to 50 |
| Strength to Weight: Bending, points | 20 to 22 | |
| 27 to 36 |
| Thermal Diffusivity, mm2/s | 4.3 | |
| 7.0 |
| Thermal Shock Resistance, points | 13 to 15 | |
| 28 to 43 |
Alloy Composition
| Carbon (C), % | 0 to 0.080 | |
| 0 to 0.2 |
| Chromium (Cr), % | 17 to 19 | |
| 15 to 17 |
| Iron (Fe), % | 64.1 to 74 | |
| 78.2 to 83.8 |
| Manganese (Mn), % | 0 to 2.0 | |
| 0 to 1.0 |
| Nickel (Ni), % | 9.0 to 13 | |
| 1.3 to 2.5 |
| Niobium (Nb), % | 0 to 1.0 | |
| 0 |
| Phosphorus (P), % | 0 to 0.045 | |
| 0 to 0.040 |
| Silicon (Si), % | 0 to 0.75 | |
| 0 to 1.0 |
| Sulfur (S), % | 0 to 0.030 | |
| 0 to 0.030 |