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Grade 27 Titanium vs. SAE-AISI H23 Steel

Grade 27 titanium belongs to the titanium alloys classification, while SAE-AISI H23 steel belongs to the iron alloys. There are 21 material properties with values for both materials. Properties with values for just one material (11, in this case) are not shown.

For each property being compared, the top bar is grade 27 titanium and the bottom bar is SAE-AISI H23 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 110
200
Poisson's Ratio 0.32
0.28
Shear Modulus, GPa 41
80
Tensile Strength: Ultimate (UTS), MPa 270
760 to 1550

Thermal Properties

Latent Heat of Fusion, J/g 420
260
Melting Completion (Liquidus), °C 1660
1680
Melting Onset (Solidus), °C 1610
1630
Specific Heat Capacity, J/kg-K 540
440
Thermal Conductivity, W/m-K 21
20
Thermal Expansion, µm/m-K 8.7
12

Otherwise Unclassified Properties

Base Metal Price, % relative 37
34
Density, g/cm3 4.5
8.7
Embodied Carbon, kg CO2/kg material 33
6.9
Embodied Energy, MJ/kg 530
110
Embodied Water, L/kg 320
120

Common Calculations

Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 35
22
Strength to Weight: Axial, points 17
24 to 49
Strength to Weight: Bending, points 21
21 to 34
Thermal Diffusivity, mm2/s 8.8
5.2
Thermal Shock Resistance, points 21
23 to 47

Alloy Composition

Carbon (C), % 0 to 0.080
0.25 to 0.35
Chromium (Cr), % 0
11 to 12.8
Copper (Cu), % 0
0 to 0.25
Hydrogen (H), % 0 to 0.015
0
Iron (Fe), % 0 to 0.2
71.3 to 76.7
Manganese (Mn), % 0
0.15 to 0.4
Nickel (Ni), % 0
0 to 0.3
Nitrogen (N), % 0 to 0.030
0
Oxygen (O), % 0 to 0.18
0
Phosphorus (P), % 0
0 to 0.030
Ruthenium (Ru), % 0.080 to 0.14
0
Silicon (Si), % 0
0.15 to 0.6
Sulfur (S), % 0
0 to 0.030
Titanium (Ti), % 99 to 99.92
0
Tungsten (W), % 0
11 to 12.8
Vanadium (V), % 0
0.75 to 1.3
Residuals, % 0 to 0.4
0