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Grade 11 Titanium vs. S81921 Stainless Steel

Grade 11 titanium belongs to the titanium alloys classification, while S81921 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 11 titanium and the bottom bar is S81921 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 120
260
Elastic (Young's, Tensile) Modulus, GPa 110
200
Elongation at Break, % 29
29
Fatigue Strength, MPa 170
370
Poisson's Ratio 0.32
0.28
Shear Modulus, GPa 38
79
Shear Strength, MPa 200
460
Tensile Strength: Ultimate (UTS), MPa 310
710
Tensile Strength: Yield (Proof), MPa 230
500

Thermal Properties

Latent Heat of Fusion, J/g 420
290
Maximum Temperature: Mechanical, °C 320
990
Melting Completion (Liquidus), °C 1660
1430
Melting Onset (Solidus), °C 1610
1390
Specific Heat Capacity, J/kg-K 540
480
Thermal Conductivity, W/m-K 22
15
Thermal Expansion, µm/m-K 9.2
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 3.7
2.2
Electrical Conductivity: Equal Weight (Specific), % IACS 7.3
2.5

Otherwise Unclassified Properties

Density, g/cm3 4.5
7.7
Embodied Carbon, kg CO2/kg material 47
2.9
Embodied Energy, MJ/kg 800
41
Embodied Water, L/kg 470
150

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 81
180
Resilience: Unit (Modulus of Resilience), kJ/m3 240
630
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 35
25
Strength to Weight: Axial, points 19
25
Strength to Weight: Bending, points 22
23
Thermal Diffusivity, mm2/s 8.9
4.0
Thermal Shock Resistance, points 22
20

Alloy Composition

Carbon (C), % 0 to 0.080
0 to 0.030
Chromium (Cr), % 0
19 to 22
Hydrogen (H), % 0 to 0.015
0
Iron (Fe), % 0 to 0.2
66.7 to 75.9
Manganese (Mn), % 0
2.0 to 4.0
Molybdenum (Mo), % 0
1.0 to 2.0
Nickel (Ni), % 0
2.0 to 4.0
Nitrogen (N), % 0 to 0.030
0.14 to 0.2
Oxygen (O), % 0 to 0.18
0
Palladium (Pd), % 0.12 to 0.25
0
Phosphorus (P), % 0
0 to 0.040
Silicon (Si), % 0
0 to 1.0
Sulfur (S), % 0
0 to 0.030
Titanium (Ti), % 98.8 to 99.88
0
Residuals, % 0 to 0.4
0