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Grade 2 Titanium vs. S31277 Stainless Steel

Grade 2 titanium belongs to the titanium alloys classification, while S31277 stainless steel belongs to the iron 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 grade 2 titanium and the bottom bar is S31277 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 110
210
Elongation at Break, % 23
45
Fatigue Strength, MPa 250
380
Poisson's Ratio 0.32
0.28
Shear Modulus, GPa 38
80
Shear Strength, MPa 270
600
Tensile Strength: Ultimate (UTS), MPa 420
860
Tensile Strength: Yield (Proof), MPa 360
410

Thermal Properties

Latent Heat of Fusion, J/g 420
310
Maximum Temperature: Mechanical, °C 320
1100
Melting Completion (Liquidus), °C 1660
1460
Melting Onset (Solidus), °C 1610
1410
Specific Heat Capacity, J/kg-K 540
460
Thermal Expansion, µm/m-K 9.0
16

Otherwise Unclassified Properties

Base Metal Price, % relative 37
36
Density, g/cm3 4.5
8.1
Embodied Carbon, kg CO2/kg material 31
6.7
Embodied Energy, MJ/kg 510
90
Embodied Water, L/kg 110
220

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 92
320
Resilience: Unit (Modulus of Resilience), kJ/m3 600
410
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 35
24
Strength to Weight: Axial, points 26
29
Strength to Weight: Bending, points 28
25
Thermal Shock Resistance, points 32
19

Alloy Composition

Carbon (C), % 0 to 0.080
0 to 0.020
Chromium (Cr), % 0
20.5 to 23
Copper (Cu), % 0
0.5 to 1.5
Hydrogen (H), % 0 to 0.015
0
Iron (Fe), % 0 to 0.3
35.5 to 46.2
Manganese (Mn), % 0
0 to 3.0
Molybdenum (Mo), % 0
6.5 to 8.0
Nickel (Ni), % 0
26 to 28
Nitrogen (N), % 0 to 0.030
0.3 to 0.4
Oxygen (O), % 0 to 0.25
0
Phosphorus (P), % 0
0 to 0.030
Silicon (Si), % 0
0 to 0.5
Sulfur (S), % 0
0 to 0.010
Titanium (Ti), % 98.9 to 100
0
Residuals, % 0 to 0.4
0