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Grade 21 Titanium vs. ASTM A202 Steel

Grade 21 titanium belongs to the titanium alloys classification, while ASTM A202 steel belongs to the iron alloys. There are 28 material properties with values for both materials. Properties with values for just one material (4, in this case) are not shown.

For each property being compared, the top bar is grade 21 titanium and the bottom bar is ASTM A202 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 140
190
Elongation at Break, % 9.0 to 17
17 to 18
Fatigue Strength, MPa 550 to 660
240
Poisson's Ratio 0.32
0.29
Shear Modulus, GPa 51
73
Shear Strength, MPa 550 to 790
360 to 410
Tensile Strength: Ultimate (UTS), MPa 890 to 1340
590 to 670
Tensile Strength: Yield (Proof), MPa 870 to 1170
350 to 360

Thermal Properties

Latent Heat of Fusion, J/g 410
260
Maximum Temperature: Mechanical, °C 310
410
Melting Completion (Liquidus), °C 1740
1450
Melting Onset (Solidus), °C 1690
1410
Specific Heat Capacity, J/kg-K 500
470
Thermal Conductivity, W/m-K 7.5
52
Thermal Expansion, µm/m-K 7.1
13

Otherwise Unclassified Properties

Base Metal Price, % relative 60
2.1
Density, g/cm3 5.4
7.8
Embodied Carbon, kg CO2/kg material 32
1.4
Embodied Energy, MJ/kg 490
19
Embodied Water, L/kg 180
49

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 110 to 180
93 to 96
Resilience: Unit (Modulus of Resilience), kJ/m3 2760 to 5010
330 to 350
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 32
24
Strength to Weight: Axial, points 46 to 69
21 to 24
Strength to Weight: Bending, points 38 to 50
20 to 22
Thermal Diffusivity, mm2/s 2.8
14
Thermal Shock Resistance, points 66 to 100
17 to 20

Comparable Variants