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Grade 2 Titanium vs. AISI 420F Stainless Steel

Grade 2 titanium belongs to the titanium alloys classification, while AISI 420F 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 2 titanium and the bottom bar is AISI 420F stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 150
230
Elastic (Young's, Tensile) Modulus, GPa 110
190
Elongation at Break, % 23
18
Fatigue Strength, MPa 250
270
Poisson's Ratio 0.32
0.28
Shear Modulus, GPa 38
76
Shear Strength, MPa 270
460
Tensile Strength: Ultimate (UTS), MPa 420
740
Tensile Strength: Yield (Proof), MPa 360
430

Thermal Properties

Latent Heat of Fusion, J/g 420
270
Maximum Temperature: Mechanical, °C 320
760
Melting Completion (Liquidus), °C 1660
1440
Melting Onset (Solidus), °C 1610
1390
Specific Heat Capacity, J/kg-K 540
480
Thermal Conductivity, W/m-K 22
25
Thermal Expansion, µm/m-K 9.0
10

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 3.6
3.1
Electrical Conductivity: Equal Weight (Specific), % IACS 7.2
3.7

Otherwise Unclassified Properties

Base Metal Price, % relative 37
7.0
Density, g/cm3 4.5
7.7
Embodied Carbon, kg CO2/kg material 31
2.0
Embodied Energy, MJ/kg 510
28
Embodied Water, L/kg 110
100

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
14
Stiffness to Weight: Bending, points 35
25
Strength to Weight: Axial, points 26
27
Strength to Weight: Bending, points 28
23
Thermal Diffusivity, mm2/s 8.9
6.8
Thermal Shock Resistance, points 32
27

Alloy Composition

Carbon (C), % 0 to 0.080
0.3 to 0.4
Chromium (Cr), % 0
12 to 14
Hydrogen (H), % 0 to 0.015
0
Iron (Fe), % 0 to 0.3
82.4 to 87.6
Manganese (Mn), % 0
0 to 1.3
Molybdenum (Mo), % 0
0 to 0.5
Nitrogen (N), % 0 to 0.030
0
Oxygen (O), % 0 to 0.25
0
Phosphorus (P), % 0
0 to 0.060
Silicon (Si), % 0
0 to 1.0
Sulfur (S), % 0
0.15 to 0.35
Titanium (Ti), % 98.9 to 100
0
Residuals, % 0 to 0.4
0