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S31727 Stainless Steel vs. Titanium 6-6-2

S31727 stainless steel belongs to the iron alloys classification, while titanium 6-6-2 belongs to the titanium alloys. There are 26 material properties with values for both materials. Properties with values for just one material (9, in this case) are not shown.

For each property being compared, the top bar is S31727 stainless steel and the bottom bar is titanium 6-6-2.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
120
Elongation at Break, % 40
6.7 to 9.0
Fatigue Strength, MPa 240
590 to 670
Poisson's Ratio 0.28
0.32
Reduction in Area, % 56
17 to 23
Shear Modulus, GPa 78
44
Shear Strength, MPa 430
670 to 800
Tensile Strength: Ultimate (UTS), MPa 630
1140 to 1370
Tensile Strength: Yield (Proof), MPa 270
1040 to 1230

Thermal Properties

Latent Heat of Fusion, J/g 290
400
Maximum Temperature: Mechanical, °C 1010
310
Melting Completion (Liquidus), °C 1440
1610
Melting Onset (Solidus), °C 1390
1560
Specific Heat Capacity, J/kg-K 470
540
Thermal Expansion, µm/m-K 16
9.4

Otherwise Unclassified Properties

Base Metal Price, % relative 24
40
Density, g/cm3 8.0
4.8
Embodied Carbon, kg CO2/kg material 4.7
29
Embodied Energy, MJ/kg 64
470
Embodied Water, L/kg 180
200

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 200
89 to 99
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 24
34
Strength to Weight: Axial, points 22
66 to 79
Strength to Weight: Bending, points 20
50 to 57
Thermal Shock Resistance, points 14
75 to 90

Alloy Composition

Aluminum (Al), % 0
5.0 to 6.0
Carbon (C), % 0 to 0.030
0 to 0.050
Chromium (Cr), % 17.5 to 19
0
Copper (Cu), % 2.8 to 4.0
0.35 to 1.0
Hydrogen (H), % 0
0 to 0.015
Iron (Fe), % 53.7 to 61.3
0.35 to 1.0
Manganese (Mn), % 0 to 1.0
0
Molybdenum (Mo), % 3.8 to 4.5
5.0 to 6.0
Nickel (Ni), % 14.5 to 16.5
0
Nitrogen (N), % 0.15 to 0.21
0 to 0.040
Oxygen (O), % 0
0 to 0.2
Phosphorus (P), % 0 to 0.030
0
Silicon (Si), % 0 to 1.0
0
Sulfur (S), % 0 to 0.030
0
Tin (Sn), % 0
1.5 to 2.5
Titanium (Ti), % 0
82.8 to 87.8
Residuals, % 0
0 to 0.4