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ASTM A209 Steel vs. Grade 27 Titanium

ASTM A209 steel belongs to the iron alloys classification, while grade 27 titanium belongs to the titanium 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 ASTM A209 steel and the bottom bar is grade 27 titanium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
110
Elongation at Break, % 34
27
Fatigue Strength, MPa 180 to 200
170
Poisson's Ratio 0.29
0.32
Shear Modulus, GPa 73
41
Shear Strength, MPa 280 to 310
180
Tensile Strength: Ultimate (UTS), MPa 420 to 460
270
Tensile Strength: Yield (Proof), MPa 220 to 250
230

Thermal Properties

Latent Heat of Fusion, J/g 250
420
Maximum Temperature: Mechanical, °C 410
320
Melting Completion (Liquidus), °C 1470
1660
Melting Onset (Solidus), °C 1420 to 1430
1610
Specific Heat Capacity, J/kg-K 470
540
Thermal Conductivity, W/m-K 50
21
Thermal Expansion, µm/m-K 13
8.7

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.1
3.6
Electrical Conductivity: Equal Weight (Specific), % IACS 8.1 to 8.2
7.1

Otherwise Unclassified Properties

Base Metal Price, % relative 2.4
37
Density, g/cm3 7.9
4.5
Embodied Carbon, kg CO2/kg material 1.5
33
Embodied Energy, MJ/kg 20
530
Embodied Water, L/kg 47
320

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 120 to 130
70
Resilience: Unit (Modulus of Resilience), kJ/m3 130 to 170
240
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
35
Strength to Weight: Axial, points 15 to 16
17
Strength to Weight: Bending, points 16 to 17
21
Thermal Diffusivity, mm2/s 13
8.8
Thermal Shock Resistance, points 12 to 14
21