MakeItFrom.com
Menu (ESC)

Grade 21 Titanium vs. EN AC-51200 Aluminum

Grade 21 titanium belongs to the titanium alloys classification, while EN AC-51200 aluminum belongs to the aluminum alloys. There are 27 material properties with values for both materials. Properties with values for just one material (5, in this case) are not shown. Please note that the two materials have significantly dissimilar densities. This means that additional care is required when interpreting the data, because some material properties are based on units of mass, while others are based on units of area or volume.

For each property being compared, the top bar is grade 21 titanium and the bottom bar is EN AC-51200 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 140
67
Elongation at Break, % 9.0 to 17
1.1
Fatigue Strength, MPa 550 to 660
100
Poisson's Ratio 0.32
0.33
Shear Modulus, GPa 51
25
Tensile Strength: Ultimate (UTS), MPa 890 to 1340
220
Tensile Strength: Yield (Proof), MPa 870 to 1170
150

Thermal Properties

Latent Heat of Fusion, J/g 410
410
Maximum Temperature: Mechanical, °C 310
170
Melting Completion (Liquidus), °C 1740
640
Melting Onset (Solidus), °C 1690
570
Specific Heat Capacity, J/kg-K 500
910
Thermal Conductivity, W/m-K 7.5
92
Thermal Expansion, µm/m-K 7.1
23

Otherwise Unclassified Properties

Base Metal Price, % relative 60
9.5
Density, g/cm3 5.4
2.6
Embodied Carbon, kg CO2/kg material 32
9.6
Embodied Energy, MJ/kg 490
150
Embodied Water, L/kg 180
1150

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 110 to 180
2.2
Resilience: Unit (Modulus of Resilience), kJ/m3 2760 to 5010
160
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 32
51
Strength to Weight: Axial, points 46 to 69
24
Strength to Weight: Bending, points 38 to 50
31
Thermal Diffusivity, mm2/s 2.8
39
Thermal Shock Resistance, points 66 to 100
10

Alloy Composition

Aluminum (Al), % 2.5 to 3.5
84.5 to 92
Carbon (C), % 0 to 0.050
0
Copper (Cu), % 0
0 to 0.1
Hydrogen (H), % 0 to 0.015
0
Iron (Fe), % 0 to 0.4
0 to 1.0
Lead (Pb), % 0
0 to 0.1
Magnesium (Mg), % 0
8.0 to 10.5
Manganese (Mn), % 0
0 to 0.55
Molybdenum (Mo), % 14 to 16
0
Nickel (Ni), % 0
0 to 0.1
Niobium (Nb), % 2.2 to 3.2
0
Nitrogen (N), % 0 to 0.030
0
Oxygen (O), % 0 to 0.17
0
Silicon (Si), % 0.15 to 0.25
0 to 2.5
Tin (Sn), % 0
0 to 0.1
Titanium (Ti), % 76 to 81.2
0 to 0.2
Zinc (Zn), % 0
0 to 0.25
Residuals, % 0 to 0.4
0 to 0.15