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Grade 31 Titanium vs. EN 1.4587 Stainless Steel

Grade 31 titanium belongs to the titanium alloys classification, while EN 1.4587 stainless steel belongs to the iron alloys. There are 28 material properties with values for both materials. Properties with values for just one material (7, in this case) are not shown.

For each property being compared, the top bar is grade 31 titanium and the bottom bar is EN 1.4587 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 110
200
Elongation at Break, % 20
34
Fatigue Strength, MPa 300
200
Poisson's Ratio 0.32
0.28
Shear Modulus, GPa 41
80
Tensile Strength: Ultimate (UTS), MPa 510
540
Tensile Strength: Yield (Proof), MPa 450
250

Thermal Properties

Latent Heat of Fusion, J/g 420
310
Maximum Temperature: Mechanical, °C 320
1100
Melting Completion (Liquidus), °C 1660
1420
Melting Onset (Solidus), °C 1610
1370
Specific Heat Capacity, J/kg-K 540
470
Thermal Conductivity, W/m-K 21
17
Thermal Expansion, µm/m-K 8.7
15

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 3.4
1.8
Electrical Conductivity: Equal Weight (Specific), % IACS 6.9
2.0

Otherwise Unclassified Properties

Density, g/cm3 4.5
8.1
Embodied Carbon, kg CO2/kg material 36
6.3
Embodied Energy, MJ/kg 600
87
Embodied Water, L/kg 230
230

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 99
150
Resilience: Unit (Modulus of Resilience), kJ/m3 940
150
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 35
24
Strength to Weight: Axial, points 32
18
Strength to Weight: Bending, points 32
18
Thermal Diffusivity, mm2/s 8.5
4.5
Thermal Shock Resistance, points 39
13

Alloy Composition

Carbon (C), % 0 to 0.080
0 to 0.030
Chromium (Cr), % 0
24 to 26
Cobalt (Co), % 0.2 to 0.8
0
Copper (Cu), % 0
2.0 to 3.0
Hydrogen (H), % 0 to 0.015
0
Iron (Fe), % 0 to 0.3
32.7 to 41.9
Manganese (Mn), % 0
0 to 2.0
Molybdenum (Mo), % 0
4.0 to 5.0
Nickel (Ni), % 0
28 to 30
Nitrogen (N), % 0 to 0.050
0.15 to 0.25
Oxygen (O), % 0 to 0.35
0
Palladium (Pd), % 0.040 to 0.080
0
Phosphorus (P), % 0
0 to 0.035
Silicon (Si), % 0
0 to 1.0
Sulfur (S), % 0
0 to 0.025
Titanium (Ti), % 97.9 to 99.76
0
Residuals, % 0 to 0.4
0