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Grade 27 Titanium vs. EN 1.4125 Stainless Steel

Grade 27 titanium belongs to the titanium alloys classification, while EN 1.4125 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 27 titanium and the bottom bar is EN 1.4125 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 110
200
Elongation at Break, % 27
19
Fatigue Strength, MPa 170
300
Poisson's Ratio 0.32
0.28
Shear Modulus, GPa 41
77
Shear Strength, MPa 180
500
Tensile Strength: Ultimate (UTS), MPa 270
800
Tensile Strength: Yield (Proof), MPa 230
470

Thermal Properties

Latent Heat of Fusion, J/g 420
280
Maximum Temperature: Mechanical, °C 320
870
Melting Completion (Liquidus), °C 1660
1430
Melting Onset (Solidus), °C 1610
1390
Specific Heat Capacity, J/kg-K 540
480
Thermal Conductivity, W/m-K 21
15
Thermal Expansion, µm/m-K 8.7
10

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 3.6
2.2
Electrical Conductivity: Equal Weight (Specific), % IACS 7.1
2.5

Otherwise Unclassified Properties

Base Metal Price, % relative 37
9.0
Density, g/cm3 4.5
7.7
Embodied Carbon, kg CO2/kg material 33
2.3
Embodied Energy, MJ/kg 530
32
Embodied Water, L/kg 320
120

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 70
130
Resilience: Unit (Modulus of Resilience), kJ/m3 240
570
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 35
25
Strength to Weight: Axial, points 17
29
Strength to Weight: Bending, points 21
25
Thermal Diffusivity, mm2/s 8.8
4.1
Thermal Shock Resistance, points 21
29

Alloy Composition

Carbon (C), % 0 to 0.080
1.0 to 1.2
Chromium (Cr), % 0
16 to 18
Hydrogen (H), % 0 to 0.015
0
Iron (Fe), % 0 to 0.2
78 to 82.7
Manganese (Mn), % 0
0 to 1.0
Molybdenum (Mo), % 0
0.4 to 0.8
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
0 to 1.0
Sulfur (S), % 0
0 to 0.015
Titanium (Ti), % 99 to 99.92
0
Residuals, % 0 to 0.4
0