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Grade 2 Titanium vs. EN 1.7725 Steel

Grade 2 titanium belongs to the titanium alloys classification, while EN 1.7725 steel belongs to the iron alloys. There are 31 material properties with values for both materials. Properties with values for just one material (3, in this case) are not shown.

For each property being compared, the top bar is grade 2 titanium and the bottom bar is EN 1.7725 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 150
250 to 300
Elastic (Young's, Tensile) Modulus, GPa 110
190
Elongation at Break, % 23
14
Fatigue Strength, MPa 250
390 to 550
Impact Strength: V-Notched Charpy, J 160
34 to 35
Poisson's Ratio 0.32
0.29
Shear Modulus, GPa 38
73
Tensile Strength: Ultimate (UTS), MPa 420
830 to 1000
Tensile Strength: Yield (Proof), MPa 360
610 to 860

Thermal Properties

Latent Heat of Fusion, J/g 420
250
Maximum Temperature: Mechanical, °C 320
440
Melting Completion (Liquidus), °C 1660
1460
Melting Onset (Solidus), °C 1610
1420
Specific Heat Capacity, J/kg-K 540
470
Thermal Conductivity, W/m-K 22
39
Thermal Expansion, µm/m-K 9.0
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 3.6
7.4
Electrical Conductivity: Equal Weight (Specific), % IACS 7.2
8.6

Otherwise Unclassified Properties

Base Metal Price, % relative 37
2.9
Density, g/cm3 4.5
7.8
Embodied Carbon, kg CO2/kg material 31
1.8
Embodied Energy, MJ/kg 510
24
Embodied Water, L/kg 110
54

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 92
110 to 130
Resilience: Unit (Modulus of Resilience), kJ/m3 600
980 to 1940
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 35
24
Strength to Weight: Axial, points 26
29 to 35
Strength to Weight: Bending, points 28
25 to 28
Thermal Diffusivity, mm2/s 8.9
11
Thermal Shock Resistance, points 32
24 to 29

Alloy Composition

Carbon (C), % 0 to 0.080
0.27 to 0.34
Chromium (Cr), % 0
1.3 to 1.7
Hydrogen (H), % 0 to 0.015
0
Iron (Fe), % 0 to 0.3
95.7 to 97.5
Manganese (Mn), % 0
0.6 to 1.0
Molybdenum (Mo), % 0
0.3 to 0.5
Nitrogen (N), % 0 to 0.030
0
Oxygen (O), % 0 to 0.25
0
Phosphorus (P), % 0
0 to 0.025
Silicon (Si), % 0
0 to 0.6
Sulfur (S), % 0
0 to 0.030
Titanium (Ti), % 98.9 to 100
0
Vanadium (V), % 0
0.050 to 0.15
Residuals, % 0 to 0.4
0