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SAE-AISI D5 Steel vs. Grade 18 Titanium

SAE-AISI D5 steel belongs to the iron alloys classification, while grade 18 titanium belongs to the titanium alloys. There are 24 material properties with values for both materials. Properties with values for just one material (8, in this case) are not shown.

For each property being compared, the top bar is SAE-AISI D5 steel and the bottom bar is grade 18 titanium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
110
Elongation at Break, % 5.4 to 14
11 to 17
Poisson's Ratio 0.28
0.32
Shear Modulus, GPa 75
40
Shear Strength, MPa 470 to 1180
420 to 590
Tensile Strength: Ultimate (UTS), MPa 770 to 2030
690 to 980

Thermal Properties

Latent Heat of Fusion, J/g 270
410
Melting Completion (Liquidus), °C 1430
1640
Melting Onset (Solidus), °C 1390
1590
Specific Heat Capacity, J/kg-K 480
550
Thermal Conductivity, W/m-K 27
8.3
Thermal Expansion, µm/m-K 11
9.9

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 4.2
1.3
Electrical Conductivity: Equal Weight (Specific), % IACS 4.9
2.7

Otherwise Unclassified Properties

Density, g/cm3 7.7
4.5
Embodied Carbon, kg CO2/kg material 3.5
41
Embodied Energy, MJ/kg 51
670
Embodied Water, L/kg 120
270

Common Calculations

Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
35
Strength to Weight: Axial, points 28 to 73
43 to 61
Strength to Weight: Bending, points 24 to 46
39 to 49
Thermal Diffusivity, mm2/s 7.4
3.4
Thermal Shock Resistance, points 26 to 67
47 to 67

Alloy Composition

Aluminum (Al), % 0
2.5 to 3.5
Carbon (C), % 1.4 to 1.6
0 to 0.080
Chromium (Cr), % 11 to 13
0
Cobalt (Co), % 2.5 to 3.5
0
Copper (Cu), % 0 to 0.25
0
Hydrogen (H), % 0
0 to 0.015
Iron (Fe), % 77.9 to 84.4
0 to 0.25
Manganese (Mn), % 0 to 0.6
0
Molybdenum (Mo), % 0.7 to 1.2
0
Nickel (Ni), % 0 to 0.3
0
Nitrogen (N), % 0
0 to 0.030
Oxygen (O), % 0
0 to 0.15
Palladium (Pd), % 0
0.040 to 0.080
Phosphorus (P), % 0 to 0.030
0
Silicon (Si), % 0 to 0.6
0
Sulfur (S), % 0 to 0.030
0
Titanium (Ti), % 0
92.5 to 95.5
Vanadium (V), % 0 to 1.0
2.0 to 3.0
Residuals, % 0
0 to 0.4

Comparable Variants