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EN 1.7221 Steel vs. Titanium 6-6-2

EN 1.7221 steel belongs to the iron alloys classification, while titanium 6-6-2 belongs to the titanium alloys. There are 28 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 EN 1.7221 steel and the bottom bar is titanium 6-6-2.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
120
Elongation at Break, % 11 to 17
6.7 to 9.0
Fatigue Strength, MPa 290 to 390
590 to 670
Poisson's Ratio 0.29
0.32
Shear Modulus, GPa 73
44
Tensile Strength: Ultimate (UTS), MPa 650 to 780
1140 to 1370
Tensile Strength: Yield (Proof), MPa 430 to 630
1040 to 1230

Thermal Properties

Latent Heat of Fusion, J/g 250
400
Maximum Temperature: Mechanical, °C 420
310
Melting Completion (Liquidus), °C 1460
1610
Melting Onset (Solidus), °C 1420
1560
Specific Heat Capacity, J/kg-K 470
540
Thermal Conductivity, W/m-K 44
5.5
Thermal Expansion, µm/m-K 13
9.4

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.3
1.1
Electrical Conductivity: Equal Weight (Specific), % IACS 8.4
2.1

Otherwise Unclassified Properties

Base Metal Price, % relative 2.4
40
Density, g/cm3 7.8
4.8
Embodied Carbon, kg CO2/kg material 1.5
29
Embodied Energy, MJ/kg 20
470
Embodied Water, L/kg 51
200

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 83 to 98
89 to 99
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
34
Strength to Weight: Axial, points 23 to 27
66 to 79
Strength to Weight: Bending, points 21 to 24
50 to 57
Thermal Diffusivity, mm2/s 12
2.1
Thermal Shock Resistance, points 19 to 23
75 to 90

Alloy Composition

Aluminum (Al), % 0
5.0 to 6.0
Carbon (C), % 0.22 to 0.29
0 to 0.050
Chromium (Cr), % 0.8 to 1.2
0
Copper (Cu), % 0
0.35 to 1.0
Hydrogen (H), % 0
0 to 0.015
Iron (Fe), % 96.8 to 98.3
0.35 to 1.0
Manganese (Mn), % 0.5 to 0.8
0
Molybdenum (Mo), % 0.15 to 0.3
5.0 to 6.0
Nitrogen (N), % 0
0 to 0.040
Oxygen (O), % 0
0 to 0.2
Phosphorus (P), % 0 to 0.025
0
Silicon (Si), % 0 to 0.6
0
Sulfur (S), % 0 to 0.030
0
Tin (Sn), % 0
1.5 to 2.5
Titanium (Ti), % 0
82.8 to 87.8
Residuals, % 0
0 to 0.4

Comparable Variants