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Grade 27 Titanium vs. ASTM A225 Steel

Grade 27 titanium belongs to the titanium alloys classification, while ASTM A225 steel belongs to the iron alloys. There are 30 material properties with values for both materials. Properties with values for just one material (2, in this case) are not shown.

For each property being compared, the top bar is grade 27 titanium and the bottom bar is ASTM A225 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 110
190
Elongation at Break, % 27
21 to 23
Fatigue Strength, MPa 170
330 to 390
Poisson's Ratio 0.32
0.29
Shear Modulus, GPa 41
73
Shear Strength, MPa 180
390 to 520
Tensile Strength: Ultimate (UTS), MPa 270
620 to 830
Tensile Strength: Yield (Proof), MPa 230
460 to 550

Thermal Properties

Latent Heat of Fusion, J/g 420
250
Maximum Temperature: Mechanical, °C 320
400
Melting Completion (Liquidus), °C 1660
1460
Melting Onset (Solidus), °C 1610
1420
Specific Heat Capacity, J/kg-K 540
470
Thermal Conductivity, W/m-K 21
52
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
8.4

Otherwise Unclassified Properties

Base Metal Price, % relative 37
2.3
Density, g/cm3 4.5
7.8
Embodied Carbon, kg CO2/kg material 33
1.8
Embodied Energy, MJ/kg 530
24 to 25
Embodied Water, L/kg 320
48

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 70
120 to 170
Resilience: Unit (Modulus of Resilience), kJ/m3 240
580 to 820
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 35
24
Strength to Weight: Axial, points 17
22 to 29
Strength to Weight: Bending, points 21
21 to 25
Thermal Diffusivity, mm2/s 8.8
14
Thermal Shock Resistance, points 21
18 to 24