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Grade 25 Titanium vs. SAE-AISI 1070 Steel

Grade 25 titanium belongs to the titanium alloys classification, while SAE-AISI 1070 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 25 titanium and the bottom bar is SAE-AISI 1070 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 110
190
Elongation at Break, % 11
10 to 13
Fatigue Strength, MPa 550
270 to 350
Poisson's Ratio 0.32
0.29
Reduction in Area, % 29
34 to 51
Shear Modulus, GPa 40
72
Shear Strength, MPa 600
380 to 460
Tensile Strength: Ultimate (UTS), MPa 1000
640 to 760
Tensile Strength: Yield (Proof), MPa 940
420 to 560

Thermal Properties

Latent Heat of Fusion, J/g 410
250
Maximum Temperature: Mechanical, °C 340
400
Melting Completion (Liquidus), °C 1610
1460
Melting Onset (Solidus), °C 1560
1420
Specific Heat Capacity, J/kg-K 560
470
Thermal Conductivity, W/m-K 7.1
50
Thermal Expansion, µm/m-K 9.6
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 1.0
10
Electrical Conductivity: Equal Weight (Specific), % IACS 2.0
12

Otherwise Unclassified Properties

Density, g/cm3 4.5
7.8
Embodied Carbon, kg CO2/kg material 43
1.4
Embodied Energy, MJ/kg 700
19
Embodied Water, L/kg 320
46

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 110
59 to 86
Resilience: Unit (Modulus of Resilience), kJ/m3 4220
470 to 850
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 35
24
Strength to Weight: Axial, points 62
23 to 27
Strength to Weight: Bending, points 50
21 to 24
Thermal Diffusivity, mm2/s 2.8
14
Thermal Shock Resistance, points 71
21 to 25

Alloy Composition

Aluminum (Al), % 5.5 to 6.8
0
Carbon (C), % 0 to 0.080
0.65 to 0.75
Hydrogen (H), % 0 to 0.013
0
Iron (Fe), % 0 to 0.4
98.3 to 98.8
Manganese (Mn), % 0
0.6 to 0.9
Nickel (Ni), % 0.3 to 0.8
0
Nitrogen (N), % 0 to 0.050
0
Oxygen (O), % 0 to 0.2
0
Palladium (Pd), % 0.040 to 0.080
0
Phosphorus (P), % 0
0 to 0.040
Sulfur (S), % 0
0 to 0.050
Titanium (Ti), % 86.7 to 90.6
0
Vanadium (V), % 3.5 to 4.5
0
Residuals, % 0 to 0.4
0