AISI 440A Stainless Steel vs. Titanium 4-4-2
AISI 440A stainless steel belongs to the iron alloys classification, while titanium 4-4-2 belongs to the titanium alloys. There are 27 material properties with values for both materials. Properties with values for just one material (6, in this case) are not shown.
For each property being compared, the top bar is AISI 440A stainless steel and the bottom bar is titanium 4-4-2.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 200 | |
| 110 |
| Elongation at Break, % | 5.0 to 20 | |
| 10 |
| Fatigue Strength, MPa | 270 to 790 | |
| 590 to 620 |
| Poisson's Ratio | 0.28 | |
| 0.32 |
| Shear Modulus, GPa | 77 | |
| 42 |
| Shear Strength, MPa | 450 to 1040 | |
| 690 to 750 |
| Tensile Strength: Ultimate (UTS), MPa | 730 to 1790 | |
| 1150 to 1250 |
| Tensile Strength: Yield (Proof), MPa | 420 to 1650 | |
| 1030 to 1080 |
Thermal Properties
| Latent Heat of Fusion, J/g | 280 | |
| 410 |
| Maximum Temperature: Mechanical, °C | 760 | |
| 310 |
| Melting Completion (Liquidus), °C | 1480 | |
| 1610 |
| Melting Onset (Solidus), °C | 1370 | |
| 1560 |
| Specific Heat Capacity, J/kg-K | 480 | |
| 540 |
| Thermal Conductivity, W/m-K | 23 | |
| 6.7 |
| Thermal Expansion, µm/m-K | 10 | |
| 8.6 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 9.0 | |
| 39 |
| Density, g/cm3 | 7.7 | |
| 4.7 |
| Embodied Carbon, kg CO2/kg material | 2.2 | |
| 30 |
| Embodied Energy, MJ/kg | 31 | |
| 480 |
| Embodied Water, L/kg | 120 | |
| 180 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 87 to 120 | |
| 110 to 120 |
| Stiffness to Weight: Axial, points | 14 | |
| 13 |
| Stiffness to Weight: Bending, points | 25 | |
| 34 |
| Strength to Weight: Axial, points | 26 to 65 | |
| 68 to 74 |
| Strength to Weight: Bending, points | 23 to 43 | |
| 52 to 55 |
| Thermal Diffusivity, mm2/s | 6.2 | |
| 2.6 |
| Thermal Shock Resistance, points | 26 to 65 | |
| 86 to 93 |
Alloy Composition
| Aluminum (Al), % | 0 | |
| 3.0 to 5.0 |
| Carbon (C), % | 0.6 to 0.75 | |
| 0 to 0.080 |
| Chromium (Cr), % | 16 to 18 | |
| 0 |
| Hydrogen (H), % | 0 | |
| 0 to 0.015 |
| Iron (Fe), % | 78.4 to 83.4 | |
| 0 to 0.2 |
| Manganese (Mn), % | 0 to 1.0 | |
| 0 |
| Molybdenum (Mo), % | 0 to 0.75 | |
| 3.0 to 5.0 |
| Nitrogen (N), % | 0 | |
| 0 to 0.050 |
| Oxygen (O), % | 0 | |
| 0 to 0.25 |
| Phosphorus (P), % | 0 to 0.040 | |
| 0 |
| Silicon (Si), % | 0 to 1.0 | |
| 0.3 to 0.7 |
| Sulfur (S), % | 0 to 0.015 | |
| 0 |
| Tin (Sn), % | 0 | |
| 1.5 to 2.5 |
| Titanium (Ti), % | 0 | |
| 85.8 to 92.2 |
| Residuals, % | 0 | |
| 0 to 0.4 |