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Grade 27 Titanium vs. EN 1.4857 Stainless Steel

Grade 27 titanium belongs to the titanium alloys classification, while EN 1.4857 stainless steel belongs to the iron alloys. There are 29 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 EN 1.4857 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 110
200
Elongation at Break, % 27
6.7
Fatigue Strength, MPa 170
120
Poisson's Ratio 0.32
0.28
Shear Modulus, GPa 41
78
Tensile Strength: Ultimate (UTS), MPa 270
500
Tensile Strength: Yield (Proof), MPa 230
250

Thermal Properties

Latent Heat of Fusion, J/g 420
330
Maximum Temperature: Mechanical, °C 320
1100
Melting Completion (Liquidus), °C 1660
1370
Melting Onset (Solidus), °C 1610
1320
Specific Heat Capacity, J/kg-K 540
480
Thermal Conductivity, W/m-K 21
13
Thermal Expansion, µm/m-K 8.7
16

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 3.6
1.7
Electrical Conductivity: Equal Weight (Specific), % IACS 7.1
2.0

Otherwise Unclassified Properties

Base Metal Price, % relative 37
34
Density, g/cm3 4.5
7.9
Embodied Carbon, kg CO2/kg material 33
5.7
Embodied Energy, MJ/kg 530
81
Embodied Water, L/kg 320
220

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 70
28
Resilience: Unit (Modulus of Resilience), kJ/m3 240
150
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 35
25
Strength to Weight: Axial, points 17
18
Strength to Weight: Bending, points 21
18
Thermal Diffusivity, mm2/s 8.8
3.4
Thermal Shock Resistance, points 21
11

Alloy Composition

Carbon (C), % 0 to 0.080
0.3 to 0.5
Chromium (Cr), % 0
24 to 27
Hydrogen (H), % 0 to 0.015
0
Iron (Fe), % 0 to 0.2
31.4 to 41.7
Manganese (Mn), % 0
0 to 2.0
Molybdenum (Mo), % 0
0 to 0.5
Nickel (Ni), % 0
33 to 36
Nitrogen (N), % 0 to 0.030
0
Oxygen (O), % 0 to 0.18
0
Phosphorus (P), % 0
0 to 0.040
Ruthenium (Ru), % 0.080 to 0.14
0
Silicon (Si), % 0
1.0 to 2.5
Sulfur (S), % 0
0 to 0.030
Titanium (Ti), % 99 to 99.92
0
Residuals, % 0 to 0.4
0