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Grade 2 Titanium vs. S44800 Stainless Steel

Grade 2 titanium belongs to the titanium alloys classification, while S44800 stainless steel belongs to the iron alloys. There are 32 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 2 titanium and the bottom bar is S44800 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 150
190
Elastic (Young's, Tensile) Modulus, GPa 110
210
Elongation at Break, % 23
23
Fatigue Strength, MPa 250
300
Poisson's Ratio 0.32
0.27
Reduction in Area, % 37
45
Shear Modulus, GPa 38
82
Shear Strength, MPa 270
370
Tensile Strength: Ultimate (UTS), MPa 420
590
Tensile Strength: Yield (Proof), MPa 360
450

Thermal Properties

Latent Heat of Fusion, J/g 420
300
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
480
Thermal Conductivity, W/m-K 22
17
Thermal Expansion, µm/m-K 9.0
11

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 3.6
2.6
Electrical Conductivity: Equal Weight (Specific), % IACS 7.2
3.0

Otherwise Unclassified Properties

Base Metal Price, % relative 37
19
Density, g/cm3 4.5
7.8
Embodied Carbon, kg CO2/kg material 31
3.8
Embodied Energy, MJ/kg 510
52
Embodied Water, L/kg 110
190

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 92
120
Resilience: Unit (Modulus of Resilience), kJ/m3 600
480
Stiffness to Weight: Axial, points 13
15
Stiffness to Weight: Bending, points 35
25
Strength to Weight: Axial, points 26
21
Strength to Weight: Bending, points 28
20
Thermal Diffusivity, mm2/s 8.9
4.6
Thermal Shock Resistance, points 32
19

Alloy Composition

Carbon (C), % 0 to 0.080
0 to 0.010
Chromium (Cr), % 0
28 to 30
Copper (Cu), % 0
0 to 0.15
Hydrogen (H), % 0 to 0.015
0
Iron (Fe), % 0 to 0.3
62.6 to 66.5
Manganese (Mn), % 0
0 to 0.3
Molybdenum (Mo), % 0
3.5 to 4.2
Nickel (Ni), % 0
2.0 to 2.5
Nitrogen (N), % 0 to 0.030
0 to 0.020
Oxygen (O), % 0 to 0.25
0
Phosphorus (P), % 0
0 to 0.025
Silicon (Si), % 0
0 to 0.2
Sulfur (S), % 0
0 to 0.020
Titanium (Ti), % 98.9 to 100
0
Residuals, % 0 to 0.4
0