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Grade 9 Titanium vs. S28200 Stainless Steel

Grade 9 titanium belongs to the titanium alloys classification, while S28200 stainless steel belongs to the iron alloys. There are 27 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 9 titanium and the bottom bar is S28200 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 110
200
Elongation at Break, % 11 to 17
45
Fatigue Strength, MPa 330 to 480
430
Poisson's Ratio 0.32
0.28
Reduction in Area, % 28
57
Shear Modulus, GPa 40
77
Shear Strength, MPa 430 to 580
610
Tensile Strength: Ultimate (UTS), MPa 700 to 960
870
Tensile Strength: Yield (Proof), MPa 540 to 830
460

Thermal Properties

Latent Heat of Fusion, J/g 410
290
Maximum Temperature: Mechanical, °C 330
900
Melting Completion (Liquidus), °C 1640
1380
Melting Onset (Solidus), °C 1590
1330
Specific Heat Capacity, J/kg-K 550
480
Thermal Expansion, µm/m-K 9.1
18

Otherwise Unclassified Properties

Base Metal Price, % relative 37
12
Density, g/cm3 4.5
7.6
Embodied Carbon, kg CO2/kg material 36
2.8
Embodied Energy, MJ/kg 580
41
Embodied Water, L/kg 150
160

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 89 to 110
330
Resilience: Unit (Modulus of Resilience), kJ/m3 1380 to 3220
540
Stiffness to Weight: Axial, points 13
15
Stiffness to Weight: Bending, points 35
26
Strength to Weight: Axial, points 43 to 60
32
Strength to Weight: Bending, points 39 to 48
27
Thermal Shock Resistance, points 52 to 71
17

Alloy Composition

Aluminum (Al), % 2.5 to 3.5
0
Carbon (C), % 0 to 0.080
0 to 0.15
Chromium (Cr), % 0
17 to 19
Copper (Cu), % 0
0.75 to 1.3
Hydrogen (H), % 0 to 0.015
0
Iron (Fe), % 0 to 0.25
57.7 to 64.1
Manganese (Mn), % 0
17 to 19
Molybdenum (Mo), % 0
0.75 to 1.3
Nitrogen (N), % 0 to 0.030
0.4 to 0.6
Oxygen (O), % 0 to 0.15
0
Phosphorus (P), % 0
0 to 0.045
Silicon (Si), % 0
0 to 1.0
Sulfur (S), % 0
0 to 0.030
Titanium (Ti), % 92.6 to 95.5
0
Vanadium (V), % 2.0 to 3.0
0
Residuals, % 0 to 0.4
0