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Grade 6 Titanium vs. EN 1.3940 Stainless Steel

Grade 6 titanium belongs to the titanium alloys classification, while EN 1.3940 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 6 titanium and the bottom bar is EN 1.3940 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 100
200
Elongation at Break, % 11
34
Fatigue Strength, MPa 290
190
Poisson's Ratio 0.32
0.28
Shear Modulus, GPa 39
77
Tensile Strength: Ultimate (UTS), MPa 890
540
Tensile Strength: Yield (Proof), MPa 840
240

Thermal Properties

Latent Heat of Fusion, J/g 410
290
Maximum Temperature: Mechanical, °C 310
930
Melting Completion (Liquidus), °C 1580
1420
Melting Onset (Solidus), °C 1530
1380
Specific Heat Capacity, J/kg-K 550
480
Thermal Conductivity, W/m-K 7.8
15
Thermal Expansion, µm/m-K 9.4
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 1.2
2.3
Electrical Conductivity: Equal Weight (Specific), % IACS 2.5
2.7

Otherwise Unclassified Properties

Base Metal Price, % relative 36
17
Density, g/cm3 4.5
7.8
Embodied Carbon, kg CO2/kg material 30
3.3
Embodied Energy, MJ/kg 480
47
Embodied Water, L/kg 190
150

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 92
150
Resilience: Unit (Modulus of Resilience), kJ/m3 3390
150
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 35
25
Strength to Weight: Axial, points 55
19
Strength to Weight: Bending, points 46
19
Thermal Diffusivity, mm2/s 3.2
4.1
Thermal Shock Resistance, points 65
16

Alloy Composition

Aluminum (Al), % 4.0 to 6.0
0
Carbon (C), % 0 to 0.080
0 to 0.030
Chromium (Cr), % 0
16.5 to 18.5
Hydrogen (H), % 0 to 0.015
0
Iron (Fe), % 0 to 0.5
64.2 to 71.4
Manganese (Mn), % 0
0 to 2.0
Nickel (Ni), % 0
12 to 14
Nitrogen (N), % 0 to 0.030
0.1 to 0.2
Oxygen (O), % 0 to 0.2
0
Phosphorus (P), % 0
0 to 0.035
Silicon (Si), % 0
0 to 1.0
Sulfur (S), % 0
0 to 0.020
Tin (Sn), % 2.0 to 3.0
0
Titanium (Ti), % 89.8 to 94
0
Residuals, % 0 to 0.4
0