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Grade 27 Titanium vs. Grade VDSiCr Steel

Grade 27 titanium belongs to the titanium alloys classification, while grade VDSiCr 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 27 titanium and the bottom bar is grade VDSiCr steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 110
190
Poisson's Ratio 0.32
0.29
Reduction in Area, % 34
48
Shear Modulus, GPa 41
80
Tensile Strength: Ultimate (UTS), MPa 270
1950

Thermal Properties

Latent Heat of Fusion, J/g 420
270
Maximum Temperature: Mechanical, °C 320
410
Melting Completion (Liquidus), °C 1660
1440
Melting Onset (Solidus), °C 1610
1400
Specific Heat Capacity, J/kg-K 540
480
Thermal Conductivity, W/m-K 21
46
Thermal Expansion, µm/m-K 8.7
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 3.6
7.3
Electrical Conductivity: Equal Weight (Specific), % IACS 7.1
8.5

Otherwise Unclassified Properties

Base Metal Price, % relative 37
2.2
Density, g/cm3 4.5
7.7
Embodied Carbon, kg CO2/kg material 33
1.5
Embodied Energy, MJ/kg 530
20
Embodied Water, L/kg 320
48

Common Calculations

Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 35
25
Strength to Weight: Axial, points 17
70
Strength to Weight: Bending, points 21
45
Thermal Diffusivity, mm2/s 8.8
12
Thermal Shock Resistance, points 21
58

Alloy Composition

Carbon (C), % 0 to 0.080
0.5 to 0.6
Chromium (Cr), % 0
0.5 to 0.8
Copper (Cu), % 0
0 to 0.060
Hydrogen (H), % 0 to 0.015
0
Iron (Fe), % 0 to 0.2
96.6 to 97.8
Manganese (Mn), % 0
0.5 to 0.9
Nitrogen (N), % 0 to 0.030
0
Oxygen (O), % 0 to 0.18
0
Phosphorus (P), % 0
0 to 0.025
Ruthenium (Ru), % 0.080 to 0.14
0
Silicon (Si), % 0
1.2 to 1.6
Sulfur (S), % 0
0 to 0.020
Titanium (Ti), % 99 to 99.92
0
Residuals, % 0 to 0.4
0