AISI 440B Stainless Steel vs. Grade 38 Titanium
AISI 440B stainless steel belongs to the iron alloys classification, while grade 38 titanium belongs to the titanium alloys. There are 29 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 440B stainless steel and the bottom bar is grade 38 titanium.
Metric UnitsUS Customary Units
Mechanical Properties
Elastic (Young's, Tensile) Modulus, GPa | 200 | |
110 |
Elongation at Break, % | 3.0 to 18 | |
11 |
Fatigue Strength, MPa | 260 to 850 | |
530 |
Poisson's Ratio | 0.28 | |
0.32 |
Shear Modulus, GPa | 77 | |
40 |
Shear Strength, MPa | 460 to 1110 | |
600 |
Tensile Strength: Ultimate (UTS), MPa | 740 to 1930 | |
1000 |
Tensile Strength: Yield (Proof), MPa | 430 to 1860 | |
910 |
Thermal Properties
Latent Heat of Fusion, J/g | 280 | |
410 |
Maximum Temperature: Mechanical, °C | 870 | |
330 |
Melting Completion (Liquidus), °C | 1480 | |
1620 |
Melting Onset (Solidus), °C | 1370 | |
1570 |
Specific Heat Capacity, J/kg-K | 480 | |
550 |
Thermal Conductivity, W/m-K | 23 | |
8.0 |
Thermal Expansion, µm/m-K | 10 | |
9.3 |
Electrical Properties
Electrical Conductivity: Equal Volume, % IACS | 2.5 | |
1.2 |
Electrical Conductivity: Equal Weight (Specific), % IACS | 2.9 | |
2.4 |
Otherwise Unclassified Properties
Base Metal Price, % relative | 9.0 | |
36 |
Density, g/cm3 | 7.7 | |
4.5 |
Embodied Carbon, kg CO2/kg material | 2.2 | |
35 |
Embodied Energy, MJ/kg | 31 | |
560 |
Embodied Water, L/kg | 120 | |
160 |
Common Calculations
Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 57 to 110 | |
110 |
Stiffness to Weight: Axial, points | 14 | |
13 |
Stiffness to Weight: Bending, points | 25 | |
35 |
Strength to Weight: Axial, points | 27 to 70 | |
62 |
Strength to Weight: Bending, points | 24 to 45 | |
49 |
Thermal Diffusivity, mm2/s | 6.1 | |
3.2 |
Thermal Shock Resistance, points | 27 to 70 | |
72 |
Alloy Composition
Aluminum (Al), % | 0 | |
3.5 to 4.5 |
Carbon (C), % | 0.75 to 1.0 | |
0 to 0.080 |
Chromium (Cr), % | 16 to 18 | |
0 |
Hydrogen (H), % | 0 | |
0 to 0.015 |
Iron (Fe), % | 78.2 to 83.3 | |
1.2 to 1.8 |
Manganese (Mn), % | 0 to 1.0 | |
0 |
Molybdenum (Mo), % | 0 to 0.75 | |
0 |
Nitrogen (N), % | 0 | |
0 to 0.030 |
Oxygen (O), % | 0 | |
0.2 to 0.3 |
Phosphorus (P), % | 0 to 0.040 | |
0 |
Silicon (Si), % | 0 to 1.0 | |
0 |
Sulfur (S), % | 0 to 0.015 | |
0 |
Titanium (Ti), % | 0 | |
89.9 to 93.1 |
Vanadium (V), % | 0 | |
2.0 to 3.0 |
Residuals, % | 0 | |
0 to 0.4 |