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Grade 6 Titanium vs. ACI-ASTM CF8C Steel

Grade 6 titanium belongs to the titanium alloys classification, while ACI-ASTM CF8C steel belongs to the iron alloys. There are 29 material properties with values for both materials. Properties with values for just one material (5, in this case) are not shown.

For each property being compared, the top bar is grade 6 titanium and the bottom bar is ACI-ASTM CF8C steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 100
200
Elongation at Break, % 11
40
Fatigue Strength, MPa 290
220
Poisson's Ratio 0.32
0.28
Shear Modulus, GPa 39
77
Tensile Strength: Ultimate (UTS), MPa 890
530
Tensile Strength: Yield (Proof), MPa 840
260

Thermal Properties

Latent Heat of Fusion, J/g 410
300
Maximum Temperature: Mechanical, °C 310
980
Melting Completion (Liquidus), °C 1580
1420
Melting Onset (Solidus), °C 1530
1430
Specific Heat Capacity, J/kg-K 550
480
Thermal Conductivity, W/m-K 7.8
16
Thermal Expansion, µm/m-K 9.4
17

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 1.2
2.0
Electrical Conductivity: Equal Weight (Specific), % IACS 2.5
2.3

Otherwise Unclassified Properties

Base Metal Price, % relative 36
19
Density, g/cm3 4.5
7.8
Embodied Carbon, kg CO2/kg material 30
3.7
Embodied Energy, MJ/kg 480
53
Embodied Water, L/kg 190
150

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 92
180
Resilience: Unit (Modulus of Resilience), kJ/m3 3390
170
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 35
25
Strength to Weight: Axial, points 55
19
Strength to Weight: Bending, points 46
19
Thermal Diffusivity, mm2/s 3.2
4.3
Thermal Shock Resistance, points 65
11

Alloy Composition

Aluminum (Al), % 4.0 to 6.0
0
Carbon (C), % 0 to 0.080
0 to 0.080
Chromium (Cr), % 0
18 to 21
Hydrogen (H), % 0 to 0.015
0
Iron (Fe), % 0 to 0.5
61.8 to 73
Manganese (Mn), % 0
0 to 1.5
Molybdenum (Mo), % 0
0 to 0.5
Nickel (Ni), % 0
9.0 to 12
Niobium (Nb), % 0
0 to 1.0
Nitrogen (N), % 0 to 0.030
0
Oxygen (O), % 0 to 0.2
0
Phosphorus (P), % 0
0 to 0.040
Silicon (Si), % 0
0 to 2.0
Sulfur (S), % 0
0 to 0.040
Tin (Sn), % 2.0 to 3.0
0
Titanium (Ti), % 89.8 to 94
0
Residuals, % 0 to 0.4
0