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S40975 Stainless Steel vs. Grade Ti-Pd8A Titanium

S40975 stainless steel belongs to the iron alloys classification, while grade Ti-Pd8A titanium belongs to the titanium alloys. There are 29 material properties with values for both materials. Properties with values for just one material (6, in this case) are not shown.

For each property being compared, the top bar is S40975 stainless steel and the bottom bar is grade Ti-Pd8A titanium.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 170
200
Elastic (Young's, Tensile) Modulus, GPa 190
110
Elongation at Break, % 22
13
Fatigue Strength, MPa 210
260
Poisson's Ratio 0.28
0.32
Shear Modulus, GPa 75
40
Tensile Strength: Ultimate (UTS), MPa 460
500
Tensile Strength: Yield (Proof), MPa 310
430

Thermal Properties

Latent Heat of Fusion, J/g 270
420
Maximum Temperature: Mechanical, °C 710
320
Melting Completion (Liquidus), °C 1450
1660
Melting Onset (Solidus), °C 1400
1610
Specific Heat Capacity, J/kg-K 480
540
Thermal Conductivity, W/m-K 26
21
Thermal Expansion, µm/m-K 10
8.7

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.9
3.5
Electrical Conductivity: Equal Weight (Specific), % IACS 3.3
6.9

Otherwise Unclassified Properties

Density, g/cm3 7.8
4.5
Embodied Carbon, kg CO2/kg material 2.0
49
Embodied Energy, MJ/kg 28
840
Embodied Water, L/kg 95
520

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 93
65
Resilience: Unit (Modulus of Resilience), kJ/m3 250
880
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
35
Strength to Weight: Axial, points 17
31
Strength to Weight: Bending, points 17
31
Thermal Diffusivity, mm2/s 7.0
8.6
Thermal Shock Resistance, points 17
39

Alloy Composition

Carbon (C), % 0 to 0.030
0 to 0.1
Chromium (Cr), % 10.5 to 11.7
0
Hydrogen (H), % 0
0 to 0.015
Iron (Fe), % 84.4 to 89
0 to 0.25
Manganese (Mn), % 0 to 1.0
0
Nickel (Ni), % 0.5 to 1.0
0 to 0.050
Nitrogen (N), % 0 to 0.030
0
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 0.030
0
Titanium (Ti), % 0 to 0.75
98.8 to 99.9
Residuals, % 0
0 to 0.4