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Grade Ti-Pd18 Titanium vs. SAE-AISI 4320 Steel

Grade Ti-Pd18 titanium belongs to the titanium alloys classification, while SAE-AISI 4320 steel belongs to the iron alloys. There are 29 material properties with values for both materials. Properties with values for just one material (3, in this case) are not shown.

For each property being compared, the top bar is grade Ti-Pd18 titanium and the bottom bar is SAE-AISI 4320 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 320
160 to 240
Elastic (Young's, Tensile) Modulus, GPa 110
190
Elongation at Break, % 17
21 to 29
Fatigue Strength, MPa 350
320
Poisson's Ratio 0.32
0.29
Shear Modulus, GPa 40
73
Tensile Strength: Ultimate (UTS), MPa 710
570 to 790
Tensile Strength: Yield (Proof), MPa 540
430 to 460

Thermal Properties

Latent Heat of Fusion, J/g 410
250
Maximum Temperature: Mechanical, °C 330
420
Melting Completion (Liquidus), °C 1640
1460
Melting Onset (Solidus), °C 1590
1420
Specific Heat Capacity, J/kg-K 550
470
Thermal Conductivity, W/m-K 8.2
46
Thermal Expansion, µm/m-K 9.1
11

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 1.4
7.4
Electrical Conductivity: Equal Weight (Specific), % IACS 2.7
8.5

Otherwise Unclassified Properties

Density, g/cm3 4.5
7.9
Embodied Carbon, kg CO2/kg material 41
1.7
Embodied Energy, MJ/kg 670
22
Embodied Water, L/kg 270
52

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 110
140 to 150
Resilience: Unit (Modulus of Resilience), kJ/m3 1380
480 to 560
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 35
24
Strength to Weight: Axial, points 44
20 to 28
Strength to Weight: Bending, points 39
19 to 24
Thermal Diffusivity, mm2/s 3.3
13
Thermal Shock Resistance, points 52
19 to 27

Alloy Composition

Aluminum (Al), % 2.5 to 3.5
0
Carbon (C), % 0 to 0.1
0.17 to 0.22
Chromium (Cr), % 0
0.4 to 0.6
Hydrogen (H), % 0 to 0.015
0
Iron (Fe), % 0 to 0.25
95.8 to 97
Manganese (Mn), % 0
0.45 to 0.65
Molybdenum (Mo), % 0
0.2 to 0.3
Nickel (Ni), % 0 to 0.050
1.7 to 2.0
Oxygen (O), % 0 to 0.15
0
Palladium (Pd), % 0.040 to 0.080
0
Phosphorus (P), % 0
0 to 0.035
Silicon (Si), % 0
0.15 to 0.35
Sulfur (S), % 0
0 to 0.040
Titanium (Ti), % 92.5 to 95.5
0
Vanadium (V), % 2.0 to 3.0
0
Residuals, % 0 to 0.4
0