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Grade 18 Titanium vs. ZA-8

Grade 18 titanium belongs to the titanium alloys classification, while ZA-8 belongs to the zinc alloys. There are 29 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 grade 18 titanium and the bottom bar is ZA-8.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 110
85 to 86
Elongation at Break, % 11 to 17
1.3 to 8.0
Fatigue Strength, MPa 330 to 480
51 to 100
Poisson's Ratio 0.32
0.26
Shear Modulus, GPa 40
34
Shear Strength, MPa 420 to 590
240 to 280
Tensile Strength: Ultimate (UTS), MPa 690 to 980
210 to 370
Tensile Strength: Yield (Proof), MPa 540 to 810
210 to 290

Thermal Properties

Latent Heat of Fusion, J/g 410
110
Maximum Temperature: Mechanical, °C 330
100
Melting Completion (Liquidus), °C 1640
400
Melting Onset (Solidus), °C 1590
380
Specific Heat Capacity, J/kg-K 550
440
Thermal Conductivity, W/m-K 8.3
120
Thermal Expansion, µm/m-K 9.9
23

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 1.3
28
Electrical Conductivity: Equal Weight (Specific), % IACS 2.7
40

Otherwise Unclassified Properties

Density, g/cm3 4.5
6.3
Embodied Carbon, kg CO2/kg material 41
3.3
Embodied Energy, MJ/kg 670
62
Embodied Water, L/kg 270
420

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 87 to 110
2.8 to 28
Resilience: Unit (Modulus of Resilience), kJ/m3 1380 to 3110
260 to 490
Stiffness to Weight: Axial, points 13
7.5
Stiffness to Weight: Bending, points 35
23
Strength to Weight: Axial, points 43 to 61
9.3 to 17
Strength to Weight: Bending, points 39 to 49
12 to 18
Thermal Diffusivity, mm2/s 3.4
42
Thermal Shock Resistance, points 47 to 67
7.6 to 13

Alloy Composition


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Aluminum (Al), % 2.5 to 3.5
8.0 to 8.8
Cadmium (Cd), % 0
0 to 0.0060
Carbon (C), % 0 to 0.080
0
Copper (Cu), % 0
0.8 to 1.3
Hydrogen (H), % 0 to 0.015
0
Iron (Fe), % 0 to 0.25
0 to 0.075
Lead (Pb), % 0
0 to 0.0060
Magnesium (Mg), % 0
0.015 to 0.030
Nickel (Ni), % 0
0 to 0.020
Nitrogen (N), % 0 to 0.030
0
Oxygen (O), % 0 to 0.15
0
Palladium (Pd), % 0.040 to 0.080
0
Silicon (Si), % 0
0 to 0.045
Tin (Sn), % 0
0 to 0.0030
Titanium (Ti), % 92.5 to 95.5
0
Vanadium (V), % 2.0 to 3.0
0
Zinc (Zn), % 0
89.7 to 91.2
Residuals, % 0 to 0.4
0

Comparable Variants