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Grade Ti-Pd18 Titanium vs. S17700 Stainless Steel

Grade Ti-Pd18 titanium belongs to the titanium alloys classification, while S17700 stainless steel belongs to the iron alloys. There are 30 material properties with values for both materials. Properties with values for just one material (4, in this case) are not shown.

For each property being compared, the top bar is grade Ti-Pd18 titanium and the bottom bar is S17700 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 320
180 to 430
Elastic (Young's, Tensile) Modulus, GPa 110
200
Elongation at Break, % 17
1.0 to 23
Fatigue Strength, MPa 350
290 to 560
Poisson's Ratio 0.32
0.28
Rockwell C Hardness 34
41 to 46
Shear Modulus, GPa 40
76
Tensile Strength: Ultimate (UTS), MPa 710
1180 to 1650
Tensile Strength: Yield (Proof), MPa 540
430 to 1210

Thermal Properties

Latent Heat of Fusion, J/g 410
290
Maximum Temperature: Mechanical, °C 330
890
Melting Completion (Liquidus), °C 1640
1440
Melting Onset (Solidus), °C 1590
1400
Specific Heat Capacity, J/kg-K 550
480
Thermal Conductivity, W/m-K 8.2
15
Thermal Expansion, µm/m-K 9.1
11

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 1.4
2.3
Electrical Conductivity: Equal Weight (Specific), % IACS 2.7
2.7

Otherwise Unclassified Properties

Density, g/cm3 4.5
7.7
Embodied Carbon, kg CO2/kg material 41
2.8
Embodied Energy, MJ/kg 670
40
Embodied Water, L/kg 270
150

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 110
15 to 210
Resilience: Unit (Modulus of Resilience), kJ/m3 1380
460 to 3750
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 35
25
Strength to Weight: Axial, points 44
42 to 59
Strength to Weight: Bending, points 39
32 to 40
Thermal Diffusivity, mm2/s 3.3
4.1
Thermal Shock Resistance, points 52
39 to 54

Alloy Composition

Aluminum (Al), % 2.5 to 3.5
0.75 to 1.5
Carbon (C), % 0 to 0.1
0 to 0.090
Chromium (Cr), % 0
16 to 18
Hydrogen (H), % 0 to 0.015
0
Iron (Fe), % 0 to 0.25
70.5 to 76.8
Manganese (Mn), % 0
0 to 1.0
Nickel (Ni), % 0 to 0.050
6.5 to 7.8
Oxygen (O), % 0 to 0.15
0
Palladium (Pd), % 0.040 to 0.080
0
Phosphorus (P), % 0
0 to 0.040
Silicon (Si), % 0
0 to 1.0
Sulfur (S), % 0
0 to 0.030
Titanium (Ti), % 92.5 to 95.5
0
Vanadium (V), % 2.0 to 3.0
0
Residuals, % 0 to 0.4
0