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Grade 19 Titanium vs. S82121 Stainless Steel

Grade 19 titanium belongs to the titanium alloys classification, while S82121 stainless steel belongs to the iron alloys. There are 28 material properties with values for both materials. Properties with values for just one material (7, in this case) are not shown.

For each property being compared, the top bar is grade 19 titanium and the bottom bar is S82121 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 120
200
Elongation at Break, % 5.6 to 17
28
Fatigue Strength, MPa 550 to 620
370
Poisson's Ratio 0.32
0.27
Shear Modulus, GPa 47
78
Shear Strength, MPa 550 to 750
470
Tensile Strength: Ultimate (UTS), MPa 890 to 1300
730
Tensile Strength: Yield (Proof), MPa 870 to 1170
510

Thermal Properties

Latent Heat of Fusion, J/g 400
290
Maximum Temperature: Mechanical, °C 370
1020
Melting Completion (Liquidus), °C 1660
1430
Melting Onset (Solidus), °C 1600
1380
Specific Heat Capacity, J/kg-K 520
480
Thermal Conductivity, W/m-K 6.2
15
Thermal Expansion, µm/m-K 9.1
13

Otherwise Unclassified Properties

Base Metal Price, % relative 45
14
Density, g/cm3 5.0
7.7
Embodied Carbon, kg CO2/kg material 47
2.8
Embodied Energy, MJ/kg 760
40
Embodied Water, L/kg 230
150

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 70 to 150
180
Resilience: Unit (Modulus of Resilience), kJ/m3 3040 to 5530
660
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 33
25
Strength to Weight: Axial, points 49 to 72
26
Strength to Weight: Bending, points 41 to 53
23
Thermal Diffusivity, mm2/s 2.4
4.0
Thermal Shock Resistance, points 57 to 83
20

Alloy Composition

Aluminum (Al), % 3.0 to 4.0
0
Carbon (C), % 0 to 0.050
0 to 0.035
Chromium (Cr), % 5.5 to 6.5
21 to 23
Copper (Cu), % 0
0.2 to 1.2
Hydrogen (H), % 0 to 0.020
0
Iron (Fe), % 0 to 0.3
66.7 to 75.4
Manganese (Mn), % 0
1.0 to 2.5
Molybdenum (Mo), % 3.5 to 4.5
0.3 to 1.3
Nickel (Ni), % 0
2.0 to 4.0
Nitrogen (N), % 0 to 0.030
0.15 to 0.25
Oxygen (O), % 0 to 0.12
0
Phosphorus (P), % 0
0 to 0.040
Silicon (Si), % 0
0 to 1.0
Sulfur (S), % 0
0 to 0.010
Titanium (Ti), % 71.1 to 77
0
Vanadium (V), % 7.5 to 8.5
0
Zirconium (Zr), % 3.5 to 4.5
0
Residuals, % 0 to 0.4
0