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Grade 27 Titanium vs. AISI 202 Stainless Steel

Grade 27 titanium belongs to the titanium alloys classification, while AISI 202 stainless steel belongs to the iron alloys. There are 30 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 27 titanium and the bottom bar is AISI 202 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 110
200
Elongation at Break, % 27
14 to 45
Fatigue Strength, MPa 170
290 to 330
Poisson's Ratio 0.32
0.28
Shear Modulus, GPa 41
77
Shear Strength, MPa 180
490 to 590
Tensile Strength: Ultimate (UTS), MPa 270
700 to 980
Tensile Strength: Yield (Proof), MPa 230
310 to 580

Thermal Properties

Latent Heat of Fusion, J/g 420
290
Maximum Temperature: Mechanical, °C 320
910
Melting Completion (Liquidus), °C 1660
1400
Melting Onset (Solidus), °C 1610
1360
Specific Heat Capacity, J/kg-K 540
480
Thermal Conductivity, W/m-K 21
15
Thermal Expansion, µm/m-K 8.7
17

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 3.6
2.4
Electrical Conductivity: Equal Weight (Specific), % IACS 7.1
2.9

Otherwise Unclassified Properties

Base Metal Price, % relative 37
13
Density, g/cm3 4.5
7.7
Embodied Carbon, kg CO2/kg material 33
2.8
Embodied Energy, MJ/kg 530
40
Embodied Water, L/kg 320
150

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 70
120 to 260
Resilience: Unit (Modulus of Resilience), kJ/m3 240
250 to 840
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 35
25
Strength to Weight: Axial, points 17
25 to 35
Strength to Weight: Bending, points 21
23 to 29
Thermal Diffusivity, mm2/s 8.8
4.0
Thermal Shock Resistance, points 21
15 to 21

Alloy Composition

Carbon (C), % 0 to 0.080
0 to 0.15
Chromium (Cr), % 0
17 to 19
Hydrogen (H), % 0 to 0.015
0
Iron (Fe), % 0 to 0.2
63.5 to 71.5
Manganese (Mn), % 0
7.5 to 10
Nickel (Ni), % 0
4.0 to 6.0
Nitrogen (N), % 0 to 0.030
0 to 0.25
Oxygen (O), % 0 to 0.18
0
Phosphorus (P), % 0
0 to 0.060
Ruthenium (Ru), % 0.080 to 0.14
0
Silicon (Si), % 0
0 to 1.0
Sulfur (S), % 0
0 to 0.030
Titanium (Ti), % 99 to 99.92
0
Residuals, % 0 to 0.4
0