Grade 18 Titanium vs. SAE-AISI 1042 Steel
Grade 18 titanium belongs to the titanium alloys classification, while SAE-AISI 1042 steel belongs to the iron alloys. There are 30 material properties with values for both materials. Properties with values for just one material (2, in this case) are not shown.
For each property being compared, the top bar is grade 18 titanium and the bottom bar is SAE-AISI 1042 steel.
Metric UnitsUS Customary Units
Mechanical Properties
Elastic (Young's, Tensile) Modulus, GPa | 110 | |
190 |
Elongation at Break, % | 11 to 17 | |
14 to 18 |
Fatigue Strength, MPa | 330 to 480 | |
230 to 370 |
Poisson's Ratio | 0.32 | |
0.29 |
Reduction in Area, % | 23 | |
39 to 50 |
Shear Modulus, GPa | 40 | |
73 |
Shear Strength, MPa | 420 to 590 | |
380 to 420 |
Tensile Strength: Ultimate (UTS), MPa | 690 to 980 | |
620 to 700 |
Tensile Strength: Yield (Proof), MPa | 540 to 810 | |
340 to 580 |
Thermal Properties
Latent Heat of Fusion, J/g | 410 | |
250 |
Maximum Temperature: Mechanical, °C | 330 | |
400 |
Melting Completion (Liquidus), °C | 1640 | |
1460 |
Melting Onset (Solidus), °C | 1590 | |
1420 |
Specific Heat Capacity, J/kg-K | 550 | |
470 |
Thermal Conductivity, W/m-K | 8.3 | |
52 |
Thermal Expansion, µm/m-K | 9.9 | |
12 |
Electrical Properties
Electrical Conductivity: Equal Volume, % IACS | 1.3 | |
7.0 |
Electrical Conductivity: Equal Weight (Specific), % IACS | 2.7 | |
8.1 |
Otherwise Unclassified Properties
Density, g/cm3 | 4.5 | |
7.8 |
Embodied Carbon, kg CO2/kg material | 41 | |
1.4 |
Embodied Energy, MJ/kg | 670 | |
18 |
Embodied Water, L/kg | 270 | |
46 |
Common Calculations
Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 87 to 110 | |
87 to 94 |
Resilience: Unit (Modulus of Resilience), kJ/m3 | 1380 to 3110 | |
320 to 900 |
Stiffness to Weight: Axial, points | 13 | |
13 |
Stiffness to Weight: Bending, points | 35 | |
24 |
Strength to Weight: Axial, points | 43 to 61 | |
22 to 25 |
Strength to Weight: Bending, points | 39 to 49 | |
21 to 22 |
Thermal Diffusivity, mm2/s | 3.4 | |
14 |
Thermal Shock Resistance, points | 47 to 67 | |
20 to 22 |
Alloy Composition
Aluminum (Al), % | 2.5 to 3.5 | |
0 |
Carbon (C), % | 0 to 0.080 | |
0.4 to 0.47 |
Hydrogen (H), % | 0 to 0.015 | |
0 |
Iron (Fe), % | 0 to 0.25 | |
98.5 to 99 |
Manganese (Mn), % | 0 | |
0.6 to 0.9 |
Nitrogen (N), % | 0 to 0.030 | |
0 |
Oxygen (O), % | 0 to 0.15 | |
0 |
Palladium (Pd), % | 0.040 to 0.080 | |
0 |
Phosphorus (P), % | 0 | |
0 to 0.040 |
Sulfur (S), % | 0 | |
0 to 0.050 |
Titanium (Ti), % | 92.5 to 95.5 | |
0 |
Vanadium (V), % | 2.0 to 3.0 | |
0 |
Residuals, % | 0 to 0.4 | |
0 |