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Grade 21 Titanium vs. N08926 Stainless Steel

Grade 21 titanium belongs to the titanium alloys classification, while N08926 stainless steel belongs to the iron alloys. There are 28 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 21 titanium and the bottom bar is N08926 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 140
200
Elongation at Break, % 9.0 to 17
40
Fatigue Strength, MPa 550 to 660
290
Poisson's Ratio 0.32
0.28
Shear Modulus, GPa 51
80
Shear Strength, MPa 550 to 790
500
Tensile Strength: Ultimate (UTS), MPa 890 to 1340
740
Tensile Strength: Yield (Proof), MPa 870 to 1170
330

Thermal Properties

Latent Heat of Fusion, J/g 410
300
Maximum Temperature: Mechanical, °C 310
1100
Melting Completion (Liquidus), °C 1740
1460
Melting Onset (Solidus), °C 1690
1410
Specific Heat Capacity, J/kg-K 500
460
Thermal Conductivity, W/m-K 7.5
12
Thermal Expansion, µm/m-K 7.1
16

Otherwise Unclassified Properties

Base Metal Price, % relative 60
33
Density, g/cm3 5.4
8.1
Embodied Carbon, kg CO2/kg material 32
6.2
Embodied Energy, MJ/kg 490
84
Embodied Water, L/kg 180
200

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 110 to 180
240
Resilience: Unit (Modulus of Resilience), kJ/m3 2760 to 5010
270
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 32
24
Strength to Weight: Axial, points 46 to 69
25
Strength to Weight: Bending, points 38 to 50
22
Thermal Diffusivity, mm2/s 2.8
3.2
Thermal Shock Resistance, points 66 to 100
16

Alloy Composition

Aluminum (Al), % 2.5 to 3.5
0
Carbon (C), % 0 to 0.050
0 to 0.020
Chromium (Cr), % 0
19 to 21
Copper (Cu), % 0
0.5 to 1.5
Hydrogen (H), % 0 to 0.015
0
Iron (Fe), % 0 to 0.4
41.7 to 50.4
Manganese (Mn), % 0
0 to 2.0
Molybdenum (Mo), % 14 to 16
6.0 to 7.0
Nickel (Ni), % 0
24 to 26
Niobium (Nb), % 2.2 to 3.2
0
Nitrogen (N), % 0 to 0.030
0.15 to 0.25
Oxygen (O), % 0 to 0.17
0
Phosphorus (P), % 0
0 to 0.030
Silicon (Si), % 0.15 to 0.25
0 to 0.5
Sulfur (S), % 0
0 to 0.010
Titanium (Ti), % 76 to 81.2
0
Residuals, % 0 to 0.4
0