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Grade 6 Titanium vs. AISI 309S Stainless Steel

Grade 6 titanium belongs to the titanium alloys classification, while AISI 309S stainless steel belongs to the iron alloys. There are 31 material properties with values for both materials. Properties with values for just one material (4, in this case) are not shown.

For each property being compared, the top bar is grade 6 titanium and the bottom bar is AISI 309S stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 100
200
Elongation at Break, % 11
42
Fatigue Strength, MPa 290
210
Poisson's Ratio 0.32
0.27
Reduction in Area, % 27
51
Shear Modulus, GPa 39
78
Shear Strength, MPa 530
400
Tensile Strength: Ultimate (UTS), MPa 890
580
Tensile Strength: Yield (Proof), MPa 840
230

Thermal Properties

Latent Heat of Fusion, J/g 410
290
Maximum Temperature: Mechanical, °C 310
1080
Melting Completion (Liquidus), °C 1580
1420
Melting Onset (Solidus), °C 1530
1370
Specific Heat Capacity, J/kg-K 550
480
Thermal Conductivity, W/m-K 7.8
15
Thermal Expansion, µm/m-K 9.4
16

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 1.2
2.2
Electrical Conductivity: Equal Weight (Specific), % IACS 2.5
2.5

Otherwise Unclassified Properties

Base Metal Price, % relative 36
19
Density, g/cm3 4.5
7.8
Embodied Carbon, kg CO2/kg material 30
3.6
Embodied Energy, MJ/kg 480
51
Embodied Water, L/kg 190
170

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 92
190
Resilience: Unit (Modulus of Resilience), kJ/m3 3390
140
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 35
25
Strength to Weight: Axial, points 55
21
Strength to Weight: Bending, points 46
20
Thermal Diffusivity, mm2/s 3.2
4.0
Thermal Shock Resistance, points 65
13

Alloy Composition

Aluminum (Al), % 4.0 to 6.0
0
Carbon (C), % 0 to 0.080
0 to 0.080
Chromium (Cr), % 0
22 to 24
Hydrogen (H), % 0 to 0.015
0
Iron (Fe), % 0 to 0.5
58.1 to 66
Manganese (Mn), % 0
0 to 2.0
Nickel (Ni), % 0
12 to 15
Nitrogen (N), % 0 to 0.030
0
Oxygen (O), % 0 to 0.2
0
Phosphorus (P), % 0
0 to 0.045
Silicon (Si), % 0
0 to 0.75
Sulfur (S), % 0
0 to 0.030
Tin (Sn), % 2.0 to 3.0
0
Titanium (Ti), % 89.8 to 94
0
Residuals, % 0 to 0.4
0