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EN 1.1221 Steel vs. Titanium 6-7

EN 1.1221 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 (6, in this case) are not shown.

For each property being compared, the top bar is EN 1.1221 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, % 10 to 21
11
Fatigue Strength, MPa 240 to 340
530
Poisson's Ratio 0.29
0.33
Shear Modulus, GPa 72
45
Shear Strength, MPa 450 to 520
610
Tensile Strength: Ultimate (UTS), MPa 730 to 870
1020
Tensile Strength: Yield (Proof), MPa 390 to 550
900

Thermal Properties

Latent Heat of Fusion, J/g 250
410
Maximum Temperature: Mechanical, °C 400
300
Melting Completion (Liquidus), °C 1460
1700
Melting Onset (Solidus), °C 1410
1650
Specific Heat Capacity, J/kg-K 470
520
Thermal Expansion, µm/m-K 12
9.3

Otherwise Unclassified Properties

Base Metal Price, % relative 2.1
75
Density, g/cm3 7.8
5.1
Embodied Carbon, kg CO2/kg material 1.5
34
Embodied Energy, MJ/kg 19
540
Embodied Water, L/kg 47
190

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 67 to 130
110
Resilience: Unit (Modulus of Resilience), kJ/m3 410 to 800
3460
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
32
Strength to Weight: Axial, points 26 to 31
56
Strength to Weight: Bending, points 23 to 26
44
Thermal Shock Resistance, points 23 to 28
66

Alloy Composition

Aluminum (Al), % 0
5.5 to 6.5
Carbon (C), % 0.57 to 0.65
0 to 0.080
Chromium (Cr), % 0 to 0.4
0
Hydrogen (H), % 0
0 to 0.0090
Iron (Fe), % 97.1 to 98.8
0 to 0.25
Manganese (Mn), % 0.6 to 0.9
0
Molybdenum (Mo), % 0 to 0.1
6.5 to 7.5
Nickel (Ni), % 0 to 0.4
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 0.035
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