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Grade 2 Titanium vs. AISI 442 Stainless Steel

Grade 2 titanium belongs to the titanium alloys classification, while AISI 442 stainless steel belongs to the iron alloys. There are 31 material properties with values for both materials. Properties with values for just one material (5, in this case) are not shown.

For each property being compared, the top bar is grade 2 titanium and the bottom bar is AISI 442 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 150
190
Elastic (Young's, Tensile) Modulus, GPa 110
200
Elongation at Break, % 23
23
Fatigue Strength, MPa 250
210
Poisson's Ratio 0.32
0.27
Shear Modulus, GPa 38
78
Shear Strength, MPa 270
370
Tensile Strength: Ultimate (UTS), MPa 420
580
Tensile Strength: Yield (Proof), MPa 360
310

Thermal Properties

Latent Heat of Fusion, J/g 420
290
Maximum Temperature: Mechanical, °C 320
960
Melting Completion (Liquidus), °C 1660
1430
Melting Onset (Solidus), °C 1610
1390
Specific Heat Capacity, J/kg-K 540
480
Thermal Conductivity, W/m-K 22
22
Thermal Expansion, µm/m-K 9.0
11

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 3.6
2.7
Electrical Conductivity: Equal Weight (Specific), % IACS 7.2
3.2

Otherwise Unclassified Properties

Base Metal Price, % relative 37
10
Density, g/cm3 4.5
7.7
Embodied Carbon, kg CO2/kg material 31
2.3
Embodied Energy, MJ/kg 510
32
Embodied Water, L/kg 110
130

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 92
110
Resilience: Unit (Modulus of Resilience), kJ/m3 600
250
Stiffness to Weight: Axial, points 13
14
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
5.8
Thermal Shock Resistance, points 32
20

Alloy Composition

Carbon (C), % 0 to 0.080
0 to 0.2
Chromium (Cr), % 0
18 to 23
Hydrogen (H), % 0 to 0.015
0
Iron (Fe), % 0 to 0.3
74.1 to 82
Manganese (Mn), % 0
0 to 1.0
Nickel (Ni), % 0
0 to 0.6
Nitrogen (N), % 0 to 0.030
0
Oxygen (O), % 0 to 0.25
0
Phosphorus (P), % 0
0 to 0.040
Silicon (Si), % 0
0 to 1.0
Sulfur (S), % 0
0 to 0.040
Titanium (Ti), % 98.9 to 100
0
Residuals, % 0 to 0.4
0