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EN 1.8550 Steel vs. Titanium 6-7

EN 1.8550 steel belongs to the iron alloys classification, while titanium 6-7 belongs to the titanium alloys. There are 26 material properties with values for both materials. Properties with values for just one material (8, in this case) are not shown.

For each property being compared, the top bar is EN 1.8550 steel and the bottom bar is titanium 6-7.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
120
Elongation at Break, % 11
11
Fatigue Strength, MPa 470
530
Poisson's Ratio 0.29
0.33
Shear Modulus, GPa 73
45
Shear Strength, MPa 600
610
Tensile Strength: Ultimate (UTS), MPa 1000
1020
Tensile Strength: Yield (Proof), MPa 760
900

Thermal Properties

Latent Heat of Fusion, J/g 250
410
Maximum Temperature: Mechanical, °C 440
300
Melting Completion (Liquidus), °C 1450
1700
Melting Onset (Solidus), °C 1410
1650
Specific Heat Capacity, J/kg-K 480
520
Thermal Expansion, µm/m-K 13
9.3

Otherwise Unclassified Properties

Base Metal Price, % relative 3.4
75
Density, g/cm3 7.8
5.1
Embodied Carbon, kg CO2/kg material 1.7
34
Embodied Energy, MJ/kg 23
540
Embodied Water, L/kg 67
190

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 100
110
Resilience: Unit (Modulus of Resilience), kJ/m3 1550
3460
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
32
Strength to Weight: Axial, points 36
56
Strength to Weight: Bending, points 29
44
Thermal Shock Resistance, points 29
66

Alloy Composition

Aluminum (Al), % 0.8 to 1.2
5.5 to 6.5
Carbon (C), % 0.3 to 0.37
0 to 0.080
Chromium (Cr), % 1.5 to 1.8
0
Hydrogen (H), % 0
0 to 0.0090
Iron (Fe), % 94.4 to 96.3
0 to 0.25
Manganese (Mn), % 0.4 to 0.7
0
Molybdenum (Mo), % 0.15 to 0.25
6.5 to 7.5
Nickel (Ni), % 0.85 to 1.2
0
Niobium (Nb), % 0
6.5 to 7.5
Nitrogen (N), % 0
0 to 0.050
Oxygen (O), % 0
0 to 0.2
Phosphorus (P), % 0 to 0.025
0
Silicon (Si), % 0 to 0.4
0
Sulfur (S), % 0 to 0.035
0
Tantalum (Ta), % 0
0 to 0.5
Titanium (Ti), % 0
84.9 to 88