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Grade 27 Titanium vs. S46500 Stainless Steel

Grade 27 titanium belongs to the titanium alloys classification, while S46500 stainless steel belongs to the iron alloys. There are 25 material properties with values for both materials. Properties with values for just one material (9, in this case) are not shown.

For each property being compared, the top bar is grade 27 titanium and the bottom bar is S46500 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 110
190
Elongation at Break, % 27
2.3 to 14
Fatigue Strength, MPa 170
550 to 890
Poisson's Ratio 0.32
0.28
Shear Modulus, GPa 41
75
Shear Strength, MPa 180
730 to 1120
Tensile Strength: Ultimate (UTS), MPa 270
1260 to 1930
Tensile Strength: Yield (Proof), MPa 230
1120 to 1810

Thermal Properties

Latent Heat of Fusion, J/g 420
280
Maximum Temperature: Mechanical, °C 320
780
Melting Completion (Liquidus), °C 1660
1450
Melting Onset (Solidus), °C 1610
1410
Specific Heat Capacity, J/kg-K 540
470
Thermal Expansion, µm/m-K 8.7
11

Otherwise Unclassified Properties

Base Metal Price, % relative 37
15
Density, g/cm3 4.5
7.9
Embodied Carbon, kg CO2/kg material 33
3.6
Embodied Energy, MJ/kg 530
51
Embodied Water, L/kg 320
120

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 70
43 to 210
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 35
25
Strength to Weight: Axial, points 17
44 to 68
Strength to Weight: Bending, points 21
33 to 44
Thermal Shock Resistance, points 21
44 to 67

Alloy Composition

Carbon (C), % 0 to 0.080
0 to 0.020
Chromium (Cr), % 0
11 to 12.5
Hydrogen (H), % 0 to 0.015
0
Iron (Fe), % 0 to 0.2
72.6 to 76.1
Manganese (Mn), % 0
0 to 0.25
Molybdenum (Mo), % 0
0.75 to 1.3
Nickel (Ni), % 0
10.7 to 11.3
Nitrogen (N), % 0 to 0.030
0 to 0.010
Oxygen (O), % 0 to 0.18
0
Phosphorus (P), % 0
0 to 0.015
Ruthenium (Ru), % 0.080 to 0.14
0
Silicon (Si), % 0
0 to 0.25
Sulfur (S), % 0
0 to 0.010
Titanium (Ti), % 99 to 99.92
1.5 to 1.8
Residuals, % 0 to 0.4
0