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AISI 308 Stainless Steel vs. Grade Ti-Pd7B Titanium

AISI 308 stainless steel belongs to the iron alloys classification, while grade Ti-Pd7B titanium belongs to the titanium alloys. There are 30 material properties with values for both materials. Properties with values for just one material (5, in this case) are not shown.

For each property being compared, the top bar is AISI 308 stainless steel and the bottom bar is grade Ti-Pd7B titanium.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 160
180
Elastic (Young's, Tensile) Modulus, GPa 200
110
Elongation at Break, % 45
17
Fatigue Strength, MPa 210
200
Poisson's Ratio 0.28
0.32
Rockwell B Hardness 76
83
Shear Modulus, GPa 78
40
Tensile Strength: Ultimate (UTS), MPa 590
390
Tensile Strength: Yield (Proof), MPa 230
310

Thermal Properties

Latent Heat of Fusion, J/g 290
420
Maximum Temperature: Mechanical, °C 990
320
Melting Completion (Liquidus), °C 1420
1660
Melting Onset (Solidus), °C 1380
1610
Specific Heat Capacity, J/kg-K 480
540
Thermal Conductivity, W/m-K 15
22
Thermal Expansion, µm/m-K 16
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 7.8
4.5
Embodied Carbon, kg CO2/kg material 3.2
49
Embodied Energy, MJ/kg 46
840
Embodied Water, L/kg 150
520

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 210
62
Resilience: Unit (Modulus of Resilience), kJ/m3 140
440
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
35
Strength to Weight: Axial, points 21
24
Strength to Weight: Bending, points 20
26
Thermal Diffusivity, mm2/s 4.1
8.9
Thermal Shock Resistance, points 13
30

Alloy Composition

Carbon (C), % 0 to 0.080
0 to 0.1
Chromium (Cr), % 19 to 21
0
Hydrogen (H), % 0
0 to 0.015
Iron (Fe), % 64.1 to 71
0 to 0.2
Manganese (Mn), % 0 to 2.0
0
Nickel (Ni), % 10 to 12
0 to 0.050
Oxygen (O), % 0
0 to 0.4
Palladium (Pd), % 0
0.12 to 0.3
Phosphorus (P), % 0 to 0.045
0
Silicon (Si), % 0 to 0.75
0
Sulfur (S), % 0 to 0.030
0
Titanium (Ti), % 0
98.8 to 99.9
Residuals, % 0
0 to 0.4