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Grade 7 Titanium vs. Grade TDC Steel

Grade 7 titanium belongs to the titanium alloys classification, while grade TDC steel belongs to the iron alloys. There are 25 material properties with values for both materials. Properties with values for just one material (7, in this case) are not shown.

For each property being compared, the top bar is grade 7 titanium and the bottom bar is grade TDC steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 150
510
Elastic (Young's, Tensile) Modulus, GPa 110
190
Poisson's Ratio 0.32
0.29
Reduction in Area, % 34
50
Shear Modulus, GPa 38
80
Tensile Strength: Ultimate (UTS), MPa 420
1700

Thermal Properties

Latent Heat of Fusion, J/g 420
250
Maximum Temperature: Mechanical, °C 320
400
Melting Completion (Liquidus), °C 1660
1450
Melting Onset (Solidus), °C 1610
1410
Specific Heat Capacity, J/kg-K 540
470
Thermal Conductivity, W/m-K 22
51
Thermal Expansion, µm/m-K 9.2
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 3.6
7.1
Electrical Conductivity: Equal Weight (Specific), % IACS 7.2
8.2

Otherwise Unclassified Properties

Density, g/cm3 4.5
7.8
Embodied Carbon, kg CO2/kg material 47
1.4
Embodied Energy, MJ/kg 800
19
Embodied Water, L/kg 470
47

Common Calculations

Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 35
24
Strength to Weight: Axial, points 26
60
Strength to Weight: Bending, points 28
40
Thermal Diffusivity, mm2/s 8.9
14
Thermal Shock Resistance, points 31
50

Alloy Composition

Carbon (C), % 0 to 0.080
0.6 to 0.75
Chromium (Cr), % 0
0 to 0.3
Copper (Cu), % 0
0 to 0.1
Hydrogen (H), % 0 to 0.015
0
Iron (Fe), % 0 to 0.3
98 to 99.4
Manganese (Mn), % 0
0.5 to 1.2
Nitrogen (N), % 0 to 0.030
0
Oxygen (O), % 0 to 0.25
0
Palladium (Pd), % 0.12 to 0.25
0
Phosphorus (P), % 0
0 to 0.020
Silicon (Si), % 0
0.1 to 0.35
Sulfur (S), % 0
0 to 0.020
Titanium (Ti), % 98.7 to 99.88
0
Residuals, % 0 to 0.4
0