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Grade 15 Titanium vs. S82012 Stainless Steel

Grade 15 titanium belongs to the titanium alloys classification, while S82012 stainless steel belongs to the iron alloys. There are 30 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 15 titanium and the bottom bar is S82012 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 110
200
Elongation at Break, % 20
40
Fatigue Strength, MPa 290
480
Poisson's Ratio 0.32
0.28
Shear Modulus, GPa 41
78
Shear Strength, MPa 340
550
Tensile Strength: Ultimate (UTS), MPa 540
800
Tensile Strength: Yield (Proof), MPa 430
560

Thermal Properties

Latent Heat of Fusion, J/g 420
280
Maximum Temperature: Mechanical, °C 320
950
Melting Completion (Liquidus), °C 1660
1430
Melting Onset (Solidus), °C 1610
1380
Specific Heat Capacity, J/kg-K 540
480
Thermal Conductivity, W/m-K 21
15
Thermal Expansion, µm/m-K 8.7
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 3.4
2.2
Electrical Conductivity: Equal Weight (Specific), % IACS 6.7
2.5

Otherwise Unclassified Properties

Base Metal Price, % relative 37
11
Density, g/cm3 4.5
7.7
Embodied Carbon, kg CO2/kg material 32
2.4
Embodied Energy, MJ/kg 520
35
Embodied Water, L/kg 210
140

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 100
290
Resilience: Unit (Modulus of Resilience), kJ/m3 870
790
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 35
25
Strength to Weight: Axial, points 33
29
Strength to Weight: Bending, points 33
25
Thermal Diffusivity, mm2/s 8.4
3.9
Thermal Shock Resistance, points 41
23

Alloy Composition


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Carbon (C), % 0 to 0.080
0 to 0.050
Chromium (Cr), % 0
19 to 20.5
Copper (Cu), % 0
0 to 1.0
Hydrogen (H), % 0 to 0.015
0
Iron (Fe), % 0 to 0.3
71.3 to 77.9
Manganese (Mn), % 0
2.0 to 4.0
Molybdenum (Mo), % 0
0.1 to 0.6
Nickel (Ni), % 0.4 to 0.6
0.8 to 1.5
Nitrogen (N), % 0 to 0.050
0.16 to 0.26
Oxygen (O), % 0 to 0.25
0
Phosphorus (P), % 0
0 to 0.040
Ruthenium (Ru), % 0.040 to 0.060
0
Silicon (Si), % 0
0 to 0.8
Sulfur (S), % 0
0 to 0.0050
Titanium (Ti), % 98.2 to 99.56
0
Residuals, % 0 to 0.4
0