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S40920 Stainless Steel vs. Grade 15 Titanium

S40920 stainless steel belongs to the iron alloys classification, while grade 15 titanium belongs to the titanium 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 S40920 stainless steel and the bottom bar is grade 15 titanium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
110
Elongation at Break, % 22
20
Fatigue Strength, MPa 130
290
Poisson's Ratio 0.28
0.32
Shear Modulus, GPa 75
41
Shear Strength, MPa 270
340
Tensile Strength: Ultimate (UTS), MPa 430
540
Tensile Strength: Yield (Proof), MPa 190
430

Thermal Properties

Latent Heat of Fusion, J/g 270
420
Maximum Temperature: Mechanical, °C 710
320
Melting Completion (Liquidus), °C 1450
1660
Melting Onset (Solidus), °C 1400
1610
Specific Heat Capacity, J/kg-K 480
540
Thermal Conductivity, W/m-K 26
21
Thermal Expansion, µm/m-K 10
8.7

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.9
3.4
Electrical Conductivity: Equal Weight (Specific), % IACS 3.3
6.7

Otherwise Unclassified Properties

Base Metal Price, % relative 6.5
37
Density, g/cm3 7.7
4.5
Embodied Carbon, kg CO2/kg material 2.0
32
Embodied Energy, MJ/kg 28
520
Embodied Water, L/kg 94
210

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 78
100
Resilience: Unit (Modulus of Resilience), kJ/m3 97
870
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
35
Strength to Weight: Axial, points 15
33
Strength to Weight: Bending, points 16
33
Thermal Diffusivity, mm2/s 6.9
8.4
Thermal Shock Resistance, points 15
41

Alloy Composition

Carbon (C), % 0 to 0.030
0 to 0.080
Chromium (Cr), % 10.5 to 11.7
0
Hydrogen (H), % 0
0 to 0.015
Iron (Fe), % 85.1 to 89.4
0 to 0.3
Manganese (Mn), % 0 to 1.0
0
Nickel (Ni), % 0 to 0.5
0.4 to 0.6
Niobium (Nb), % 0 to 0.1
0
Nitrogen (N), % 0 to 0.030
0 to 0.050
Oxygen (O), % 0
0 to 0.25
Phosphorus (P), % 0 to 0.040
0
Ruthenium (Ru), % 0
0.040 to 0.060
Silicon (Si), % 0 to 1.0
0
Sulfur (S), % 0 to 0.020
0
Titanium (Ti), % 0.15 to 0.5
98.2 to 99.56
Residuals, % 0
0 to 0.4