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Grade 3 Titanium vs. S35125 Stainless Steel

Grade 3 titanium belongs to the titanium alloys classification, while S35125 stainless steel belongs to the iron alloys. There are 30 material properties with values for both materials. Properties with values for just one material (5, in this case) are not shown.

For each property being compared, the top bar is grade 3 titanium and the bottom bar is S35125 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 110
200
Elongation at Break, % 21
39
Fatigue Strength, MPa 300
200
Poisson's Ratio 0.32
0.28
Shear Modulus, GPa 39
78
Shear Strength, MPa 320
370
Tensile Strength: Ultimate (UTS), MPa 510
540
Tensile Strength: Yield (Proof), MPa 440
230

Thermal Properties

Latent Heat of Fusion, J/g 420
300
Maximum Temperature: Mechanical, °C 320
1100
Melting Completion (Liquidus), °C 1660
1430
Melting Onset (Solidus), °C 1610
1380
Specific Heat Capacity, J/kg-K 540
470
Thermal Conductivity, W/m-K 21
12
Thermal Expansion, µm/m-K 9.2
16

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 3.3
1.7
Electrical Conductivity: Equal Weight (Specific), % IACS 6.6
1.9

Otherwise Unclassified Properties

Base Metal Price, % relative 37
36
Density, g/cm3 4.5
8.1
Embodied Carbon, kg CO2/kg material 31
6.4
Embodied Energy, MJ/kg 510
89
Embodied Water, L/kg 110
210

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 100
170
Resilience: Unit (Modulus of Resilience), kJ/m3 910
140
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 35
24
Strength to Weight: Axial, points 32
19
Strength to Weight: Bending, points 32
18
Thermal Diffusivity, mm2/s 8.6
3.1
Thermal Shock Resistance, points 37
12

Alloy Composition

Carbon (C), % 0 to 0.080
0 to 0.1
Chromium (Cr), % 0
20 to 23
Hydrogen (H), % 0 to 0.015
0
Iron (Fe), % 0 to 0.3
36.2 to 45.8
Manganese (Mn), % 0
1.0 to 1.5
Molybdenum (Mo), % 0
2.0 to 3.0
Nickel (Ni), % 0
31 to 35
Niobium (Nb), % 0
0.25 to 0.6
Nitrogen (N), % 0 to 0.050
0
Oxygen (O), % 0 to 0.35
0
Phosphorus (P), % 0
0 to 0.045
Silicon (Si), % 0
0 to 0.5
Sulfur (S), % 0
0 to 0.015
Titanium (Ti), % 98.8 to 100
0
Residuals, % 0 to 0.4
0