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Grade 31 Titanium vs. SAE-AISI 6150 Steel

Grade 31 titanium belongs to the titanium alloys classification, while SAE-AISI 6150 steel belongs to the iron 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 grade 31 titanium and the bottom bar is SAE-AISI 6150 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 110
190
Elongation at Break, % 20
15 to 23
Fatigue Strength, MPa 300
300 to 750
Poisson's Ratio 0.32
0.29
Shear Modulus, GPa 41
73
Shear Strength, MPa 320
400 to 730
Tensile Strength: Ultimate (UTS), MPa 510
630 to 1200
Tensile Strength: Yield (Proof), MPa 450
420 to 1160

Thermal Properties

Latent Heat of Fusion, J/g 420
250
Maximum Temperature: Mechanical, °C 320
420
Melting Completion (Liquidus), °C 1660
1460
Melting Onset (Solidus), °C 1610
1410
Specific Heat Capacity, J/kg-K 540
470
Thermal Conductivity, W/m-K 21
46
Thermal Expansion, µm/m-K 8.7
12 to 13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 3.4
7.3
Electrical Conductivity: Equal Weight (Specific), % IACS 6.9
8.4

Otherwise Unclassified Properties

Density, g/cm3 4.5
7.8
Embodied Carbon, kg CO2/kg material 36
2.0
Embodied Energy, MJ/kg 600
28
Embodied Water, L/kg 230
51

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 99
130 to 180
Resilience: Unit (Modulus of Resilience), kJ/m3 940
460 to 3590
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 35
24
Strength to Weight: Axial, points 32
22 to 43
Strength to Weight: Bending, points 32
21 to 32
Thermal Diffusivity, mm2/s 8.5
13
Thermal Shock Resistance, points 39
20 to 38

Alloy Composition

Carbon (C), % 0 to 0.080
0.48 to 0.53
Chromium (Cr), % 0
0.8 to 1.1
Cobalt (Co), % 0.2 to 0.8
0
Hydrogen (H), % 0 to 0.015
0
Iron (Fe), % 0 to 0.3
96.7 to 97.7
Manganese (Mn), % 0
0.7 to 0.9
Nitrogen (N), % 0 to 0.050
0
Oxygen (O), % 0 to 0.35
0
Palladium (Pd), % 0.040 to 0.080
0
Phosphorus (P), % 0
0 to 0.035
Silicon (Si), % 0
0.15 to 0.35
Sulfur (S), % 0
0 to 0.040
Titanium (Ti), % 97.9 to 99.76
0
Vanadium (V), % 0
0.15 to 0.3
Residuals, % 0 to 0.4
0