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SAE-AISI 4142 Steel vs. Grade Ti-Pd18 Titanium

SAE-AISI 4142 steel belongs to the iron alloys classification, while grade Ti-Pd18 titanium belongs to the titanium 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 SAE-AISI 4142 steel and the bottom bar is grade Ti-Pd18 titanium.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 180
320
Elastic (Young's, Tensile) Modulus, GPa 190
110
Elongation at Break, % 20
17
Fatigue Strength, MPa 250
350
Poisson's Ratio 0.29
0.32
Shear Modulus, GPa 73
40
Tensile Strength: Ultimate (UTS), MPa 590
710
Tensile Strength: Yield (Proof), MPa 370
540

Thermal Properties

Latent Heat of Fusion, J/g 250
410
Maximum Temperature: Mechanical, °C 420
330
Melting Completion (Liquidus), °C 1460
1640
Melting Onset (Solidus), °C 1420
1590
Specific Heat Capacity, J/kg-K 470
550
Thermal Conductivity, W/m-K 44
8.2
Thermal Expansion, µm/m-K 12
9.1

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.3
1.4
Electrical Conductivity: Equal Weight (Specific), % IACS 8.4
2.7

Otherwise Unclassified Properties

Density, g/cm3 7.8
4.5
Embodied Carbon, kg CO2/kg material 1.5
41
Embodied Energy, MJ/kg 20
670
Embodied Water, L/kg 51
270

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 100
110
Resilience: Unit (Modulus of Resilience), kJ/m3 360
1380
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
35
Strength to Weight: Axial, points 21
44
Strength to Weight: Bending, points 20
39
Thermal Diffusivity, mm2/s 12
3.3
Thermal Shock Resistance, points 19
52

Alloy Composition


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Aluminum (Al), % 0
2.5 to 3.5
Carbon (C), % 0.4 to 0.45
0 to 0.1
Chromium (Cr), % 0.8 to 1.1
0
Hydrogen (H), % 0
0 to 0.015
Iron (Fe), % 96.8 to 97.8
0 to 0.25
Manganese (Mn), % 0.75 to 1.0
0
Molybdenum (Mo), % 0.15 to 0.25
0
Nickel (Ni), % 0
0 to 0.050
Oxygen (O), % 0
0 to 0.15
Palladium (Pd), % 0
0.040 to 0.080
Phosphorus (P), % 0 to 0.035
0
Silicon (Si), % 0.15 to 0.35
0
Sulfur (S), % 0 to 0.040
0
Titanium (Ti), % 0
92.5 to 95.5
Vanadium (V), % 0
2.0 to 3.0
Residuals, % 0
0 to 0.4