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Grade 20 Titanium vs. S32803 Stainless Steel

Grade 20 titanium belongs to the titanium alloys classification, while S32803 stainless steel belongs to the iron alloys. There are 25 material properties with values for both materials. Properties with values for just one material (10, in this case) are not shown.

For each property being compared, the top bar is grade 20 titanium and the bottom bar is S32803 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 120
210
Elongation at Break, % 5.7 to 17
18
Fatigue Strength, MPa 550 to 630
350
Poisson's Ratio 0.32
0.27
Shear Modulus, GPa 47
81
Shear Strength, MPa 560 to 740
420
Tensile Strength: Ultimate (UTS), MPa 900 to 1270
680
Tensile Strength: Yield (Proof), MPa 850 to 1190
560

Thermal Properties

Latent Heat of Fusion, J/g 400
300
Maximum Temperature: Mechanical, °C 370
1100
Melting Completion (Liquidus), °C 1660
1450
Melting Onset (Solidus), °C 1600
1400
Specific Heat Capacity, J/kg-K 520
480
Thermal Expansion, µm/m-K 9.6
11

Otherwise Unclassified Properties

Density, g/cm3 5.0
7.7
Embodied Carbon, kg CO2/kg material 52
3.7
Embodied Energy, MJ/kg 860
53
Embodied Water, L/kg 350
180

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 71 to 150
120
Resilience: Unit (Modulus of Resilience), kJ/m3 2940 to 5760
760
Stiffness to Weight: Axial, points 14
15
Stiffness to Weight: Bending, points 33
25
Strength to Weight: Axial, points 50 to 70
25
Strength to Weight: Bending, points 41 to 52
22
Thermal Shock Resistance, points 55 to 77
22

Alloy Composition

Aluminum (Al), % 3.0 to 4.0
0
Carbon (C), % 0 to 0.050
0 to 0.015
Chromium (Cr), % 5.5 to 6.5
28 to 29
Hydrogen (H), % 0 to 0.020
0
Iron (Fe), % 0 to 0.3
62.9 to 67.1
Manganese (Mn), % 0
0 to 0.5
Molybdenum (Mo), % 3.5 to 4.5
1.8 to 2.5
Nickel (Ni), % 0
3.0 to 4.0
Niobium (Nb), % 0
0.15 to 0.5
Nitrogen (N), % 0 to 0.030
0 to 0.020
Oxygen (O), % 0 to 0.12
0
Palladium (Pd), % 0.040 to 0.080
0
Phosphorus (P), % 0
0 to 0.020
Silicon (Si), % 0
0 to 0.55
Sulfur (S), % 0
0 to 0.0035
Titanium (Ti), % 71 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