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S43940 Stainless Steel vs. Grade Ti-Pd17 Titanium

S43940 stainless steel belongs to the iron alloys classification, while grade Ti-Pd17 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 S43940 stainless steel and the bottom bar is grade Ti-Pd17 titanium.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 160
200
Elastic (Young's, Tensile) Modulus, GPa 200
110
Elongation at Break, % 21
22
Fatigue Strength, MPa 180
140
Poisson's Ratio 0.28
0.32
Shear Modulus, GPa 77
40
Tensile Strength: Ultimate (UTS), MPa 490
270
Tensile Strength: Yield (Proof), MPa 280
190

Thermal Properties

Latent Heat of Fusion, J/g 280
420
Maximum Temperature: Mechanical, °C 890
320
Melting Completion (Liquidus), °C 1440
1660
Melting Onset (Solidus), °C 1400
1610
Specific Heat Capacity, J/kg-K 480
540
Thermal Conductivity, W/m-K 25
21
Thermal Expansion, µm/m-K 10
8.7

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.9
3.6
Electrical Conductivity: Equal Weight (Specific), % IACS 3.4
7.1

Otherwise Unclassified Properties

Density, g/cm3 7.7
4.5
Embodied Carbon, kg CO2/kg material 2.6
36
Embodied Energy, MJ/kg 38
600
Embodied Water, L/kg 120
230

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 86
55
Resilience: Unit (Modulus of Resilience), kJ/m3 200
180
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
35
Strength to Weight: Axial, points 18
17
Strength to Weight: Bending, points 18
21
Thermal Diffusivity, mm2/s 6.8
8.8
Thermal Shock Resistance, points 18
21

Alloy Composition

Carbon (C), % 0 to 0.030
0 to 0.1
Chromium (Cr), % 17.5 to 18.5
0
Hydrogen (H), % 0
0 to 0.015
Iron (Fe), % 78.2 to 82.1
0 to 0.2
Manganese (Mn), % 0 to 1.0
0
Nickel (Ni), % 0
0 to 0.030
Niobium (Nb), % 0.3 to 0.6
0
Oxygen (O), % 0
0 to 0.25
Palladium (Pd), % 0
0.040 to 0.080
Phosphorus (P), % 0 to 0.040
0
Silicon (Si), % 0 to 1.0
0
Sulfur (S), % 0 to 0.015
0
Titanium (Ti), % 0.1 to 0.6
98.9 to 99.96
Residuals, % 0
0 to 0.4