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Grade 30 Titanium vs. S35125 Stainless Steel

Grade 30 titanium belongs to the titanium alloys classification, while S35125 stainless steel belongs to the iron alloys. There are 29 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 30 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, % 23
39
Fatigue Strength, MPa 250
200
Poisson's Ratio 0.32
0.28
Shear Modulus, GPa 41
78
Shear Strength, MPa 240
370
Tensile Strength: Ultimate (UTS), MPa 390
540
Tensile Strength: Yield (Proof), MPa 350
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 8.7
16

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 3.4
1.7
Electrical Conductivity: Equal Weight (Specific), % IACS 6.9
1.9

Otherwise Unclassified Properties

Density, g/cm3 4.5
8.1
Embodied Carbon, kg CO2/kg material 36
6.4
Embodied Energy, MJ/kg 600
89
Embodied Water, L/kg 230
210

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 86
170
Resilience: Unit (Modulus of Resilience), kJ/m3 590
140
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 35
24
Strength to Weight: Axial, points 24
19
Strength to Weight: Bending, points 26
18
Thermal Diffusivity, mm2/s 8.6
3.1
Thermal Shock Resistance, points 30
12

Alloy Composition

Carbon (C), % 0 to 0.080
0 to 0.1
Chromium (Cr), % 0
20 to 23
Cobalt (Co), % 0.2 to 0.8
0
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 0.030
0
Oxygen (O), % 0 to 0.25
0
Palladium (Pd), % 0.040 to 0.080
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 to 99.76
0
Residuals, % 0 to 0.4
0