AISI 321 Stainless Steel vs. Titanium 6-6-2
AISI 321 stainless steel belongs to the iron alloys classification, while titanium 6-6-2 belongs to the titanium alloys. There are 29 material properties with values for both materials. Properties with values for just one material (5, in this case) are not shown.
For each property being compared, the top bar is AISI 321 stainless steel and the bottom bar is titanium 6-6-2.
Metric UnitsUS Customary Units
Mechanical Properties
Elastic (Young's, Tensile) Modulus, GPa | 200 | |
120 |
Elongation at Break, % | 34 to 50 | |
6.7 to 9.0 |
Fatigue Strength, MPa | 220 to 270 | |
590 to 670 |
Poisson's Ratio | 0.28 | |
0.32 |
Shear Modulus, GPa | 77 | |
44 |
Shear Strength, MPa | 420 to 460 | |
670 to 800 |
Tensile Strength: Ultimate (UTS), MPa | 590 to 690 | |
1140 to 1370 |
Tensile Strength: Yield (Proof), MPa | 220 to 350 | |
1040 to 1230 |
Thermal Properties
Latent Heat of Fusion, J/g | 290 | |
400 |
Maximum Temperature: Mechanical, °C | 870 | |
310 |
Melting Completion (Liquidus), °C | 1430 | |
1610 |
Melting Onset (Solidus), °C | 1400 | |
1560 |
Specific Heat Capacity, J/kg-K | 480 | |
540 |
Thermal Conductivity, W/m-K | 16 | |
5.5 |
Thermal Expansion, µm/m-K | 17 | |
9.4 |
Electrical Properties
Electrical Conductivity: Equal Volume, % IACS | 2.4 | |
1.1 |
Electrical Conductivity: Equal Weight (Specific), % IACS | 2.7 | |
2.1 |
Otherwise Unclassified Properties
Base Metal Price, % relative | 16 | |
40 |
Density, g/cm3 | 7.8 | |
4.8 |
Embodied Carbon, kg CO2/kg material | 3.2 | |
29 |
Embodied Energy, MJ/kg | 45 | |
470 |
Embodied Water, L/kg | 140 | |
200 |
Common Calculations
Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 190 to 230 | |
89 to 99 |
Stiffness to Weight: Axial, points | 14 | |
13 |
Stiffness to Weight: Bending, points | 25 | |
34 |
Strength to Weight: Axial, points | 21 to 25 | |
66 to 79 |
Strength to Weight: Bending, points | 20 to 22 | |
50 to 57 |
Thermal Diffusivity, mm2/s | 4.1 | |
2.1 |
Thermal Shock Resistance, points | 13 to 15 | |
75 to 90 |
Alloy Composition
Aluminum (Al), % | 0 | |
5.0 to 6.0 |
Carbon (C), % | 0 to 0.080 | |
0 to 0.050 |
Chromium (Cr), % | 17 to 19 | |
0 |
Copper (Cu), % | 0 | |
0.35 to 1.0 |
Hydrogen (H), % | 0 | |
0 to 0.015 |
Iron (Fe), % | 65.3 to 74 | |
0.35 to 1.0 |
Manganese (Mn), % | 0 to 2.0 | |
0 |
Molybdenum (Mo), % | 0 | |
5.0 to 6.0 |
Nickel (Ni), % | 9.0 to 12 | |
0 |
Nitrogen (N), % | 0 to 0.1 | |
0 to 0.040 |
Oxygen (O), % | 0 | |
0 to 0.2 |
Phosphorus (P), % | 0 to 0.045 | |
0 |
Silicon (Si), % | 0 to 0.75 | |
0 |
Sulfur (S), % | 0 to 0.030 | |
0 |
Tin (Sn), % | 0 | |
1.5 to 2.5 |
Titanium (Ti), % | 0 to 0.7 | |
82.8 to 87.8 |
Residuals, % | 0 | |
0 to 0.4 |