AISI 431 Stainless Steel vs. Grade 5 Titanium
AISI 431 stainless steel belongs to the iron alloys classification, while grade 5 titanium belongs to the titanium alloys. There are 31 material properties with values for both materials. Properties with values for just one material (4, in this case) are not shown.
For each property being compared, the top bar is AISI 431 stainless steel and the bottom bar is grade 5 titanium.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 200 | |
| 110 |
| Elongation at Break, % | 15 to 17 | |
| 8.6 to 11 |
| Fatigue Strength, MPa | 430 to 610 | |
| 530 to 630 |
| Poisson's Ratio | 0.28 | |
| 0.32 |
| Rockwell C Hardness | 26 | |
| 33 |
| Shear Modulus, GPa | 77 | |
| 40 |
| Shear Strength, MPa | 550 to 840 | |
| 600 to 710 |
| Tensile Strength: Ultimate (UTS), MPa | 890 to 1380 | |
| 1000 to 1190 |
| Tensile Strength: Yield (Proof), MPa | 710 to 1040 | |
| 910 to 1110 |
Thermal Properties
| Latent Heat of Fusion, J/g | 280 | |
| 410 |
| Maximum Temperature: Mechanical, °C | 850 | |
| 330 |
| Melting Completion (Liquidus), °C | 1510 | |
| 1610 |
| Melting Onset (Solidus), °C | 1450 | |
| 1650 |
| Specific Heat Capacity, J/kg-K | 480 | |
| 560 |
| Thermal Conductivity, W/m-K | 26 | |
| 6.8 |
| Thermal Expansion, µm/m-K | 12 | |
| 8.9 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 2.6 | |
| 1.0 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 3.0 | |
| 2.0 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 9.0 | |
| 36 |
| Density, g/cm3 | 7.7 | |
| 4.4 |
| Embodied Carbon, kg CO2/kg material | 2.2 | |
| 38 |
| Embodied Energy, MJ/kg | 31 | |
| 610 |
| Embodied Water, L/kg | 120 | |
| 200 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 140 to 180 | |
| 100 to 110 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 1270 to 2770 | |
| 3980 to 5880 |
| Stiffness to Weight: Axial, points | 14 | |
| 13 |
| Stiffness to Weight: Bending, points | 25 | |
| 35 |
| Strength to Weight: Axial, points | 32 to 50 | |
| 62 to 75 |
| Strength to Weight: Bending, points | 27 to 36 | |
| 50 to 56 |
| Thermal Diffusivity, mm2/s | 7.0 | |
| 2.7 |
| Thermal Shock Resistance, points | 28 to 43 | |
| 76 to 91 |
Alloy Composition
| Aluminum (Al), % | 0 | |
| 5.5 to 6.8 |
| Carbon (C), % | 0 to 0.2 | |
| 0 to 0.080 |
| Chromium (Cr), % | 15 to 17 | |
| 0 |
| Hydrogen (H), % | 0 | |
| 0 to 0.015 |
| Iron (Fe), % | 78.2 to 83.8 | |
| 0 to 0.4 |
| Manganese (Mn), % | 0 to 1.0 | |
| 0 |
| Nickel (Ni), % | 1.3 to 2.5 | |
| 0 |
| Nitrogen (N), % | 0 | |
| 0 to 0.050 |
| Oxygen (O), % | 0 | |
| 0 to 0.2 |
| Phosphorus (P), % | 0 to 0.040 | |
| 0 |
| Silicon (Si), % | 0 to 1.0 | |
| 0 |
| Sulfur (S), % | 0 to 0.030 | |
| 0 |
| Titanium (Ti), % | 0 | |
| 87.4 to 91 |
| Vanadium (V), % | 0 | |
| 3.5 to 4.5 |
| Yttrium (Y), % | 0 | |
| 0 to 0.0050 |
| Residuals, % | 0 | |
| 0 to 0.4 |