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Grade 6 Titanium vs. S21800 Stainless Steel

Grade 6 titanium belongs to the titanium alloys classification, while S21800 stainless steel belongs to the iron alloys. There are 27 material properties with values for both materials. Properties with values for just one material (8, in this case) are not shown.

For each property being compared, the top bar is grade 6 titanium and the bottom bar is S21800 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 100
190
Elongation at Break, % 11
40
Fatigue Strength, MPa 290
330
Poisson's Ratio 0.32
0.28
Reduction in Area, % 27
62
Shear Modulus, GPa 39
75
Shear Strength, MPa 530
510
Tensile Strength: Ultimate (UTS), MPa 890
740
Tensile Strength: Yield (Proof), MPa 840
390

Thermal Properties

Latent Heat of Fusion, J/g 410
340
Maximum Temperature: Mechanical, °C 310
900
Melting Completion (Liquidus), °C 1580
1360
Melting Onset (Solidus), °C 1530
1310
Specific Heat Capacity, J/kg-K 550
500
Thermal Expansion, µm/m-K 9.4
16

Otherwise Unclassified Properties

Base Metal Price, % relative 36
15
Density, g/cm3 4.5
7.5
Embodied Carbon, kg CO2/kg material 30
3.1
Embodied Energy, MJ/kg 480
45
Embodied Water, L/kg 190
150

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 92
250
Resilience: Unit (Modulus of Resilience), kJ/m3 3390
390
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 35
26
Strength to Weight: Axial, points 55
27
Strength to Weight: Bending, points 46
24
Thermal Shock Resistance, points 65
17

Alloy Composition

Aluminum (Al), % 4.0 to 6.0
0
Carbon (C), % 0 to 0.080
0 to 0.1
Chromium (Cr), % 0
16 to 18
Hydrogen (H), % 0 to 0.015
0
Iron (Fe), % 0 to 0.5
59.1 to 65.4
Manganese (Mn), % 0
7.0 to 9.0
Nickel (Ni), % 0
8.0 to 9.0
Nitrogen (N), % 0 to 0.030
0.080 to 0.18
Oxygen (O), % 0 to 0.2
0
Phosphorus (P), % 0
0 to 0.060
Silicon (Si), % 0
3.5 to 4.5
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