AISI 420 Stainless Steel vs. Titanium 4-4-2
AISI 420 stainless steel belongs to the iron alloys classification, while titanium 4-4-2 belongs to the titanium alloys. There are 28 material properties with values for both materials. Properties with values for just one material (7, in this case) are not shown.
For each property being compared, the top bar is AISI 420 stainless steel and the bottom bar is titanium 4-4-2.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 190 | |
| 110 |
| Elongation at Break, % | 8.0 to 15 | |
| 10 |
| Fatigue Strength, MPa | 220 to 670 | |
| 590 to 620 |
| Poisson's Ratio | 0.28 | |
| 0.32 |
| Shear Modulus, GPa | 76 | |
| 42 |
| Shear Strength, MPa | 420 to 1010 | |
| 690 to 750 |
| Tensile Strength: Ultimate (UTS), MPa | 690 to 1720 | |
| 1150 to 1250 |
| Tensile Strength: Yield (Proof), MPa | 380 to 1310 | |
| 1030 to 1080 |
Thermal Properties
| Latent Heat of Fusion, J/g | 280 | |
| 410 |
| Maximum Temperature: Mechanical, °C | 620 | |
| 310 |
| Melting Completion (Liquidus), °C | 1510 | |
| 1610 |
| Melting Onset (Solidus), °C | 1450 | |
| 1560 |
| Specific Heat Capacity, J/kg-K | 480 | |
| 540 |
| Thermal Conductivity, W/m-K | 27 | |
| 6.7 |
| Thermal Expansion, µm/m-K | 10 | |
| 8.6 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 7.5 | |
| 39 |
| Density, g/cm3 | 7.7 | |
| 4.7 |
| Embodied Carbon, kg CO2/kg material | 2.0 | |
| 30 |
| Embodied Energy, MJ/kg | 28 | |
| 480 |
| Embodied Water, L/kg | 100 | |
| 180 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 88 to 130 | |
| 110 to 120 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 380 to 4410 | |
| 4700 to 5160 |
| Stiffness to Weight: Axial, points | 14 | |
| 13 |
| Stiffness to Weight: Bending, points | 25 | |
| 34 |
| Strength to Weight: Axial, points | 25 to 62 | |
| 68 to 74 |
| Strength to Weight: Bending, points | 22 to 41 | |
| 52 to 55 |
| Thermal Diffusivity, mm2/s | 7.3 | |
| 2.6 |
| Thermal Shock Resistance, points | 25 to 62 | |
| 86 to 93 |
Alloy Composition
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| Aluminum (Al), % | 0 | |
| 3.0 to 5.0 |
| Carbon (C), % | 0.15 to 0.4 | |
| 0 to 0.080 |
| Chromium (Cr), % | 12 to 14 | |
| 0 |
| Hydrogen (H), % | 0 | |
| 0 to 0.015 |
| Iron (Fe), % | 82.3 to 87.9 | |
| 0 to 0.2 |
| Manganese (Mn), % | 0 to 1.0 | |
| 0 |
| Molybdenum (Mo), % | 0 to 0.5 | |
| 3.0 to 5.0 |
| Nickel (Ni), % | 0 to 0.75 | |
| 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 0.030 | |
| 0 |
| Tin (Sn), % | 0 | |
| 1.5 to 2.5 |
| Titanium (Ti), % | 0 | |
| 85.8 to 92.2 |
| Residuals, % | 0 | |
| 0 to 0.4 |