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Grade 27 Titanium vs. N08031 Stainless Steel

Grade 27 titanium belongs to the titanium alloys classification, while N08031 stainless steel belongs to the iron alloys. There are 28 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 27 titanium and the bottom bar is N08031 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 110
210
Elongation at Break, % 27
45
Fatigue Strength, MPa 170
290
Poisson's Ratio 0.32
0.28
Shear Modulus, GPa 41
81
Shear Strength, MPa 180
510
Tensile Strength: Ultimate (UTS), MPa 270
730
Tensile Strength: Yield (Proof), MPa 230
310

Thermal Properties

Latent Heat of Fusion, J/g 420
310
Maximum Temperature: Mechanical, °C 320
1100
Melting Completion (Liquidus), °C 1660
1440
Melting Onset (Solidus), °C 1610
1390
Specific Heat Capacity, J/kg-K 540
460
Thermal Conductivity, W/m-K 21
12
Thermal Expansion, µm/m-K 8.7
18

Otherwise Unclassified Properties

Base Metal Price, % relative 37
39
Density, g/cm3 4.5
8.1
Embodied Carbon, kg CO2/kg material 33
7.1
Embodied Energy, MJ/kg 530
96
Embodied Water, L/kg 320
240

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 70
270
Resilience: Unit (Modulus of Resilience), kJ/m3 240
230
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 35
24
Strength to Weight: Axial, points 17
25
Strength to Weight: Bending, points 21
22
Thermal Diffusivity, mm2/s 8.8
3.1
Thermal Shock Resistance, points 21
14

Alloy Composition

Carbon (C), % 0 to 0.080
0 to 0.015
Chromium (Cr), % 0
26 to 28
Copper (Cu), % 0
1.0 to 1.4
Hydrogen (H), % 0 to 0.015
0
Iron (Fe), % 0 to 0.2
29 to 36.9
Manganese (Mn), % 0
0 to 2.0
Molybdenum (Mo), % 0
6.0 to 7.0
Nickel (Ni), % 0
30 to 32
Nitrogen (N), % 0 to 0.030
0.15 to 0.25
Oxygen (O), % 0 to 0.18
0
Phosphorus (P), % 0
0 to 0.020
Ruthenium (Ru), % 0.080 to 0.14
0
Silicon (Si), % 0
0 to 0.3
Sulfur (S), % 0
0 to 0.010
Titanium (Ti), % 99 to 99.92
0
Residuals, % 0 to 0.4
0