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Grade 15 Titanium vs. ACI-ASTM CD4MCu Steel

Grade 15 titanium belongs to the titanium alloys classification, while ACI-ASTM CD4MCu steel belongs to the iron 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 grade 15 titanium and the bottom bar is ACI-ASTM CD4MCu steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 110
200
Elongation at Break, % 20
18
Fatigue Strength, MPa 290
340
Poisson's Ratio 0.32
0.27
Shear Modulus, GPa 41
79
Tensile Strength: Ultimate (UTS), MPa 540
770
Tensile Strength: Yield (Proof), MPa 430
550

Thermal Properties

Latent Heat of Fusion, J/g 420
300
Maximum Temperature: Mechanical, °C 320
1100
Melting Completion (Liquidus), °C 1660
1430
Melting Onset (Solidus), °C 1610
1380
Specific Heat Capacity, J/kg-K 540
480
Thermal Conductivity, W/m-K 21
17
Thermal Expansion, µm/m-K 8.7
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 3.4
2.2
Electrical Conductivity: Equal Weight (Specific), % IACS 6.7
2.5

Otherwise Unclassified Properties

Base Metal Price, % relative 37
18
Density, g/cm3 4.5
7.8
Embodied Carbon, kg CO2/kg material 32
3.5
Embodied Energy, MJ/kg 520
49
Embodied Water, L/kg 210
180

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 100
130
Resilience: Unit (Modulus of Resilience), kJ/m3 870
760
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 35
25
Strength to Weight: Axial, points 33
28
Strength to Weight: Bending, points 33
24
Thermal Diffusivity, mm2/s 8.4
4.5
Thermal Shock Resistance, points 41
21

Alloy Composition

Carbon (C), % 0 to 0.080
0 to 0.040
Chromium (Cr), % 0
24.5 to 26.5
Copper (Cu), % 0
2.8 to 3.3
Hydrogen (H), % 0 to 0.015
0
Iron (Fe), % 0 to 0.3
59.9 to 66.3
Manganese (Mn), % 0
0 to 1.0
Molybdenum (Mo), % 0
1.8 to 2.3
Nickel (Ni), % 0.4 to 0.6
4.8 to 6.0
Nitrogen (N), % 0 to 0.050
0
Oxygen (O), % 0 to 0.25
0
Phosphorus (P), % 0
0 to 0.040
Ruthenium (Ru), % 0.040 to 0.060
0
Silicon (Si), % 0
0 to 1.0
Sulfur (S), % 0
0 to 0.040
Titanium (Ti), % 98.2 to 99.56
0
Residuals, % 0 to 0.4
0