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Grade 27 Titanium vs. ASTM A387 Grade 2 Steel

Grade 27 titanium belongs to the titanium alloys classification, while ASTM A387 grade 2 steel 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 27 titanium and the bottom bar is ASTM A387 grade 2 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 110
190
Elongation at Break, % 27
25
Fatigue Strength, MPa 170
190 to 250
Poisson's Ratio 0.32
0.29
Shear Modulus, GPa 41
73
Shear Strength, MPa 180
300 to 350
Tensile Strength: Ultimate (UTS), MPa 270
470 to 550
Tensile Strength: Yield (Proof), MPa 230
260 to 350

Thermal Properties

Latent Heat of Fusion, J/g 420
250
Maximum Temperature: Mechanical, °C 320
420
Melting Completion (Liquidus), °C 1660
1470
Melting Onset (Solidus), °C 1610
1420
Specific Heat Capacity, J/kg-K 540
470
Thermal Conductivity, W/m-K 21
45
Thermal Expansion, µm/m-K 8.7
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 3.6
7.2
Electrical Conductivity: Equal Weight (Specific), % IACS 7.1
8.3

Otherwise Unclassified Properties

Base Metal Price, % relative 37
2.6
Density, g/cm3 4.5
7.9
Embodied Carbon, kg CO2/kg material 33
1.6
Embodied Energy, MJ/kg 530
20
Embodied Water, L/kg 320
50

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 70
98 to 120
Resilience: Unit (Modulus of Resilience), kJ/m3 240
180 to 320
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 35
24
Strength to Weight: Axial, points 17
16 to 20
Strength to Weight: Bending, points 21
17 to 19
Thermal Diffusivity, mm2/s 8.8
12
Thermal Shock Resistance, points 21
14 to 16

Alloy Composition

Carbon (C), % 0 to 0.080
0.050 to 0.21
Chromium (Cr), % 0
0.5 to 0.8
Hydrogen (H), % 0 to 0.015
0
Iron (Fe), % 0 to 0.2
97.1 to 98.3
Manganese (Mn), % 0
0.55 to 0.8
Molybdenum (Mo), % 0
0.45 to 0.6
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
0.15 to 0.4
Sulfur (S), % 0
0 to 0.025
Titanium (Ti), % 99 to 99.92
0
Residuals, % 0 to 0.4
0