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Titanium 6-7 vs. S21900 Stainless Steel

Titanium 6-7 belongs to the titanium alloys classification, while S21900 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 titanium 6-7 and the bottom bar is S21900 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 120
200
Elongation at Break, % 11
50
Fatigue Strength, MPa 530
380
Poisson's Ratio 0.33
0.28
Reduction in Area, % 29
57
Shear Modulus, GPa 45
78
Shear Strength, MPa 610
510
Tensile Strength: Ultimate (UTS), MPa 1020
710
Tensile Strength: Yield (Proof), MPa 900
390

Thermal Properties

Latent Heat of Fusion, J/g 410
290
Maximum Temperature: Mechanical, °C 300
980
Melting Completion (Liquidus), °C 1700
1400
Melting Onset (Solidus), °C 1650
1350
Specific Heat Capacity, J/kg-K 520
480
Thermal Expansion, µm/m-K 9.3
17

Otherwise Unclassified Properties

Base Metal Price, % relative 75
15
Density, g/cm3 5.1
7.7
Embodied Carbon, kg CO2/kg material 34
3.0
Embodied Energy, MJ/kg 540
43
Embodied Water, L/kg 190
160

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 110
300
Resilience: Unit (Modulus of Resilience), kJ/m3 3460
380
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 32
25
Strength to Weight: Axial, points 56
26
Strength to Weight: Bending, points 44
23
Thermal Shock Resistance, points 66
15

Alloy Composition

Aluminum (Al), % 5.5 to 6.5
0
Carbon (C), % 0 to 0.080
0 to 0.080
Chromium (Cr), % 0
19 to 21.5
Hydrogen (H), % 0 to 0.0090
0
Iron (Fe), % 0 to 0.25
59.4 to 67.4
Manganese (Mn), % 0
8.0 to 10
Molybdenum (Mo), % 6.5 to 7.5
0
Nickel (Ni), % 0
5.5 to 7.5
Niobium (Nb), % 6.5 to 7.5
0
Nitrogen (N), % 0 to 0.050
0.15 to 0.4
Oxygen (O), % 0 to 0.2
0
Phosphorus (P), % 0
0 to 0.045
Silicon (Si), % 0
0 to 1.0
Sulfur (S), % 0
0 to 0.030
Tantalum (Ta), % 0 to 0.5
0
Titanium (Ti), % 84.9 to 88
0