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Grade 6 Titanium vs. ASTM A356 Grade 8

Grade 6 titanium belongs to the titanium alloys classification, while ASTM A356 grade 8 belongs to the iron alloys. There are 30 material properties with values for both materials. Properties with values for just one material (3, in this case) are not shown.

For each property being compared, the top bar is grade 6 titanium and the bottom bar is ASTM A356 grade 8.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 100
190
Elongation at Break, % 11
21
Fatigue Strength, MPa 290
270
Poisson's Ratio 0.32
0.29
Reduction in Area, % 27
50
Shear Modulus, GPa 39
73
Tensile Strength: Ultimate (UTS), MPa 890
630
Tensile Strength: Yield (Proof), MPa 840
390

Thermal Properties

Latent Heat of Fusion, J/g 410
260
Maximum Temperature: Mechanical, °C 310
440
Melting Completion (Liquidus), °C 1580
1470
Melting Onset (Solidus), °C 1530
1430
Specific Heat Capacity, J/kg-K 550
470
Thermal Conductivity, W/m-K 7.8
38
Thermal Expansion, µm/m-K 9.4
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 1.2
7.5
Electrical Conductivity: Equal Weight (Specific), % IACS 2.5
8.6

Otherwise Unclassified Properties

Base Metal Price, % relative 36
3.5
Density, g/cm3 4.5
7.8
Embodied Carbon, kg CO2/kg material 30
2.0
Embodied Energy, MJ/kg 480
26
Embodied Water, L/kg 190
55

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 92
110
Resilience: Unit (Modulus of Resilience), kJ/m3 3390
390
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 35
24
Strength to Weight: Axial, points 55
22
Strength to Weight: Bending, points 46
21
Thermal Diffusivity, mm2/s 3.2
10
Thermal Shock Resistance, points 65
18

Alloy Composition

Aluminum (Al), % 4.0 to 6.0
0
Carbon (C), % 0 to 0.080
0 to 0.2
Chromium (Cr), % 0
1.0 to 1.5
Hydrogen (H), % 0 to 0.015
0
Iron (Fe), % 0 to 0.5
95.4 to 97.4
Manganese (Mn), % 0
0.5 to 0.9
Molybdenum (Mo), % 0
0.9 to 1.2
Nitrogen (N), % 0 to 0.030
0
Oxygen (O), % 0 to 0.2
0
Phosphorus (P), % 0
0 to 0.035
Silicon (Si), % 0
0.2 to 0.6
Sulfur (S), % 0
0 to 0.030
Tin (Sn), % 2.0 to 3.0
0
Titanium (Ti), % 89.8 to 94
0
Vanadium (V), % 0
0.050 to 0.15
Residuals, % 0 to 0.4
0