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ASTM A572 Steel vs. Grade 31 Titanium

ASTM A572 steel belongs to the iron alloys classification, while grade 31 titanium belongs to the titanium alloys. There are 29 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 A572 steel and the bottom bar is grade 31 titanium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
110
Elongation at Break, % 18 to 25
20
Fatigue Strength, MPa 240 to 340
300
Poisson's Ratio 0.29
0.32
Shear Modulus, GPa 73
41
Shear Strength, MPa 300 to 380
320
Tensile Strength: Ultimate (UTS), MPa 470 to 620
510
Tensile Strength: Yield (Proof), MPa 330 to 510
450

Thermal Properties

Latent Heat of Fusion, J/g 250
420
Maximum Temperature: Mechanical, °C 400
320
Melting Completion (Liquidus), °C 1460
1660
Melting Onset (Solidus), °C 1420
1610
Specific Heat Capacity, J/kg-K 470
540
Thermal Conductivity, W/m-K 51
21
Thermal Expansion, µm/m-K 13
8.7

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.2
3.4
Electrical Conductivity: Equal Weight (Specific), % IACS 8.2 to 8.3
6.9

Otherwise Unclassified Properties

Density, g/cm3 7.8
4.5
Embodied Carbon, kg CO2/kg material 1.6
36
Embodied Energy, MJ/kg 22
600
Embodied Water, L/kg 47
230

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 100 to 110
99
Resilience: Unit (Modulus of Resilience), kJ/m3 290 to 690
940
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
35
Strength to Weight: Axial, points 17 to 22
32
Strength to Weight: Bending, points 17 to 21
32
Thermal Diffusivity, mm2/s 14
8.5
Thermal Shock Resistance, points 14 to 18
39