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Grade 28 Titanium vs. ASTM A302 Alloy Steel

Grade 28 titanium belongs to the titanium alloys classification, while ASTM A302 alloy 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 28 titanium and the bottom bar is ASTM A302 alloy steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 110
190
Elongation at Break, % 11 to 17
20 to 23
Fatigue Strength, MPa 330 to 480
250 to 280
Poisson's Ratio 0.32
0.29
Shear Modulus, GPa 40
73
Shear Strength, MPa 420 to 590
370 to 390
Tensile Strength: Ultimate (UTS), MPa 690 to 980
590 to 620
Tensile Strength: Yield (Proof), MPa 540 to 810
350 to 390

Thermal Properties

Latent Heat of Fusion, J/g 410
250
Maximum Temperature: Mechanical, °C 330
410
Melting Completion (Liquidus), °C 1640
1460
Melting Onset (Solidus), °C 1590
1420
Specific Heat Capacity, J/kg-K 550
470
Thermal Conductivity, W/m-K 8.3
39 to 51
Thermal Expansion, µm/m-K 9.9
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 1.3
7.2 to 7.4
Electrical Conductivity: Equal Weight (Specific), % IACS 2.7
8.2 to 8.4

Otherwise Unclassified Properties

Base Metal Price, % relative 36
2.4 to 3.0
Density, g/cm3 4.5
7.8 to 7.9
Embodied Carbon, kg CO2/kg material 37
1.5 to 1.6
Embodied Energy, MJ/kg 600
20 to 21
Embodied Water, L/kg 370
48 to 50

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 87 to 110
110 to 120
Resilience: Unit (Modulus of Resilience), kJ/m3 1370 to 3100
330 to 410
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 35
24
Strength to Weight: Axial, points 43 to 61
21 to 22
Strength to Weight: Bending, points 39 to 49
20 to 21
Thermal Diffusivity, mm2/s 3.4
10 to 14
Thermal Shock Resistance, points 47 to 66
17 to 18