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Grade 25 Titanium vs. S44627 Stainless Steel

Grade 25 titanium belongs to the titanium alloys classification, while S44627 stainless steel belongs to the iron 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 grade 25 titanium and the bottom bar is S44627 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 110
200
Elongation at Break, % 11
24
Fatigue Strength, MPa 550
200
Poisson's Ratio 0.32
0.27
Reduction in Area, % 29
51
Shear Modulus, GPa 40
80
Shear Strength, MPa 600
310
Tensile Strength: Ultimate (UTS), MPa 1000
490
Tensile Strength: Yield (Proof), MPa 940
300

Thermal Properties

Latent Heat of Fusion, J/g 410
290
Maximum Temperature: Mechanical, °C 340
1100
Melting Completion (Liquidus), °C 1610
1440
Melting Onset (Solidus), °C 1560
1400
Specific Heat Capacity, J/kg-K 560
480
Thermal Conductivity, W/m-K 7.1
17
Thermal Expansion, µm/m-K 9.6
11

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 1.0
2.2
Electrical Conductivity: Equal Weight (Specific), % IACS 2.0
2.6

Otherwise Unclassified Properties

Density, g/cm3 4.5
7.7
Embodied Carbon, kg CO2/kg material 43
2.9
Embodied Energy, MJ/kg 700
41
Embodied Water, L/kg 320
160

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 110
100
Resilience: Unit (Modulus of Resilience), kJ/m3 4220
220
Stiffness to Weight: Axial, points 13
15
Stiffness to Weight: Bending, points 35
25
Strength to Weight: Axial, points 62
18
Strength to Weight: Bending, points 50
18
Thermal Diffusivity, mm2/s 2.8
4.6
Thermal Shock Resistance, points 71
16

Alloy Composition

Aluminum (Al), % 5.5 to 6.8
0
Carbon (C), % 0 to 0.080
0 to 0.010
Chromium (Cr), % 0
25 to 27.5
Copper (Cu), % 0
0 to 0.2
Hydrogen (H), % 0 to 0.013
0
Iron (Fe), % 0 to 0.4
69.2 to 74.2
Manganese (Mn), % 0
0 to 0.4
Molybdenum (Mo), % 0
0.75 to 1.5
Nickel (Ni), % 0.3 to 0.8
0 to 0.5
Niobium (Nb), % 0
0.050 to 0.2
Nitrogen (N), % 0 to 0.050
0 to 0.015
Oxygen (O), % 0 to 0.2
0
Palladium (Pd), % 0.040 to 0.080
0
Phosphorus (P), % 0
0 to 0.020
Silicon (Si), % 0
0 to 0.4
Sulfur (S), % 0
0 to 0.020
Titanium (Ti), % 86.7 to 90.6
0
Vanadium (V), % 3.5 to 4.5
0
Residuals, % 0 to 0.4
0