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EN 1.7221 Steel vs. Titanium 6-2-4-2

EN 1.7221 steel belongs to the iron alloys classification, while titanium 6-2-4-2 belongs to the titanium alloys. There are 29 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 EN 1.7221 steel and the bottom bar is titanium 6-2-4-2.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
110
Elongation at Break, % 11 to 17
8.6
Fatigue Strength, MPa 290 to 390
490
Poisson's Ratio 0.29
0.32
Shear Modulus, GPa 73
40
Tensile Strength: Ultimate (UTS), MPa 650 to 780
950
Tensile Strength: Yield (Proof), MPa 430 to 630
880

Thermal Properties

Latent Heat of Fusion, J/g 250
400
Maximum Temperature: Mechanical, °C 420
300
Melting Completion (Liquidus), °C 1460
1590
Melting Onset (Solidus), °C 1420
1540
Specific Heat Capacity, J/kg-K 470
540
Thermal Conductivity, W/m-K 44
6.9
Thermal Expansion, µm/m-K 13
9.5

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.3
0.9
Electrical Conductivity: Equal Weight (Specific), % IACS 8.4
1.8

Otherwise Unclassified Properties

Base Metal Price, % relative 2.4
42
Density, g/cm3 7.8
4.6
Embodied Carbon, kg CO2/kg material 1.5
32
Embodied Energy, MJ/kg 20
520
Embodied Water, L/kg 51
210

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 83 to 98
79
Resilience: Unit (Modulus of Resilience), kJ/m3 490 to 1050
3640
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
34
Strength to Weight: Axial, points 23 to 27
57
Strength to Weight: Bending, points 21 to 24
46
Thermal Diffusivity, mm2/s 12
2.8
Thermal Shock Resistance, points 19 to 23
67

Alloy Composition

Aluminum (Al), % 0
5.5 to 6.5
Carbon (C), % 0.22 to 0.29
0 to 0.050
Chromium (Cr), % 0.8 to 1.2
0
Hydrogen (H), % 0
0 to 0.015
Iron (Fe), % 96.8 to 98.3
0 to 0.25
Manganese (Mn), % 0.5 to 0.8
0
Molybdenum (Mo), % 0.15 to 0.3
1.8 to 2.2
Nitrogen (N), % 0
0 to 0.050
Oxygen (O), % 0
0 to 0.15
Phosphorus (P), % 0 to 0.025
0
Silicon (Si), % 0 to 0.6
0.060 to 0.12
Sulfur (S), % 0 to 0.030
0
Tin (Sn), % 0
1.8 to 2.2
Titanium (Ti), % 0
83.7 to 87.2
Zirconium (Zr), % 0
3.6 to 4.4
Residuals, % 0
0 to 0.4