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AISI 440C Stainless Steel vs. Grade Ti-Pd7B Titanium

AISI 440C stainless steel belongs to the iron alloys classification, while grade Ti-Pd7B titanium belongs to the titanium alloys. There are 27 material properties with values for both materials. Properties with values for just one material (7, in this case) are not shown.

For each property being compared, the top bar is AISI 440C stainless steel and the bottom bar is grade Ti-Pd7B titanium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
110
Elongation at Break, % 2.0 to 14
17
Fatigue Strength, MPa 260 to 840
200
Poisson's Ratio 0.28
0.32
Shear Modulus, GPa 76
40
Tensile Strength: Ultimate (UTS), MPa 710 to 1970
390
Tensile Strength: Yield (Proof), MPa 450 to 1900
310

Thermal Properties

Latent Heat of Fusion, J/g 280
420
Maximum Temperature: Mechanical, °C 870
320
Melting Completion (Liquidus), °C 1480
1660
Melting Onset (Solidus), °C 1370
1610
Specific Heat Capacity, J/kg-K 480
540
Thermal Conductivity, W/m-K 22
22
Thermal Expansion, µm/m-K 10
8.7

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.4
3.6
Electrical Conductivity: Equal Weight (Specific), % IACS 2.8
7.1

Otherwise Unclassified Properties

Density, g/cm3 7.7
4.5
Embodied Carbon, kg CO2/kg material 2.2
49
Embodied Energy, MJ/kg 31
840
Embodied Water, L/kg 120
520

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 39 to 88
62
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
35
Strength to Weight: Axial, points 26 to 71
24
Strength to Weight: Bending, points 23 to 46
26
Thermal Diffusivity, mm2/s 6.0
8.9
Thermal Shock Resistance, points 26 to 71
30

Alloy Composition

Carbon (C), % 1.0 to 1.2
0 to 0.1
Chromium (Cr), % 16 to 18
0
Hydrogen (H), % 0
0 to 0.015
Iron (Fe), % 78 to 83.1
0 to 0.2
Manganese (Mn), % 0 to 1.0
0
Molybdenum (Mo), % 0 to 0.75
0
Nickel (Ni), % 0
0 to 0.050
Oxygen (O), % 0
0 to 0.4
Palladium (Pd), % 0
0.12 to 0.3
Phosphorus (P), % 0 to 0.040
0
Silicon (Si), % 0 to 1.0
0
Sulfur (S), % 0 to 0.015
0
Titanium (Ti), % 0
98.8 to 99.9
Residuals, % 0
0 to 0.4