ACI-ASTM CB7Cu-1 Steel vs. Grade 21 Titanium
ACI-ASTM CB7Cu-1 steel belongs to the iron alloys classification, while grade 21 titanium belongs to the titanium alloys. There are 26 material properties with values for both materials. Properties with values for just one material (8, in this case) are not shown.
For each property being compared, the top bar is ACI-ASTM CB7Cu-1 steel and the bottom bar is grade 21 titanium.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 190 | |
| 140 |
| Elongation at Break, % | 5.7 to 11 | |
| 9.0 to 17 |
| Fatigue Strength, MPa | 420 to 590 | |
| 550 to 660 |
| Poisson's Ratio | 0.28 | |
| 0.32 |
| Shear Modulus, GPa | 76 | |
| 51 |
| Tensile Strength: Ultimate (UTS), MPa | 960 to 1350 | |
| 890 to 1340 |
| Tensile Strength: Yield (Proof), MPa | 760 to 1180 | |
| 870 to 1170 |
Thermal Properties
| Latent Heat of Fusion, J/g | 280 | |
| 410 |
| Melting Completion (Liquidus), °C | 1430 | |
| 1740 |
| Melting Onset (Solidus), °C | 1500 | |
| 1690 |
| Specific Heat Capacity, J/kg-K | 480 | |
| 500 |
| Thermal Conductivity, W/m-K | 17 | |
| 7.5 |
| Thermal Expansion, µm/m-K | 11 | |
| 7.1 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 13 | |
| 60 |
| Density, g/cm3 | 7.8 | |
| 5.4 |
| Embodied Carbon, kg CO2/kg material | 2.6 | |
| 32 |
| Embodied Energy, MJ/kg | 38 | |
| 490 |
| Embodied Water, L/kg | 130 | |
| 180 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 71 to 120 | |
| 110 to 180 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 1500 to 3590 | |
| 2760 to 5010 |
| Stiffness to Weight: Axial, points | 14 | |
| 14 |
| Stiffness to Weight: Bending, points | 25 | |
| 32 |
| Strength to Weight: Axial, points | 34 to 48 | |
| 46 to 69 |
| Strength to Weight: Bending, points | 28 to 35 | |
| 38 to 50 |
| Thermal Diffusivity, mm2/s | 4.6 | |
| 2.8 |
| Thermal Shock Resistance, points | 32 to 45 | |
| 66 to 100 |
Alloy Composition
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| Aluminum (Al), % | 0 | |
| 2.5 to 3.5 |
| Carbon (C), % | 0 to 0.070 | |
| 0 to 0.050 |
| Chromium (Cr), % | 15.5 to 17.7 | |
| 0 |
| Copper (Cu), % | 2.5 to 3.2 | |
| 0 |
| Hydrogen (H), % | 0 | |
| 0 to 0.015 |
| Iron (Fe), % | 72.3 to 78.4 | |
| 0 to 0.4 |
| Manganese (Mn), % | 0 to 0.7 | |
| 0 |
| Molybdenum (Mo), % | 0 | |
| 14 to 16 |
| Nickel (Ni), % | 3.6 to 4.6 | |
| 0 |
| Niobium (Nb), % | 0 to 0.35 | |
| 2.2 to 3.2 |
| Nitrogen (N), % | 0 to 0.050 | |
| 0 to 0.030 |
| Oxygen (O), % | 0 | |
| 0 to 0.17 |
| Phosphorus (P), % | 0 to 0.035 | |
| 0 |
| Silicon (Si), % | 0 to 1.0 | |
| 0.15 to 0.25 |
| Sulfur (S), % | 0 to 0.030 | |
| 0 |
| Titanium (Ti), % | 0 | |
| 76 to 81.2 |
| Residuals, % | 0 | |
| 0 to 0.4 |