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Grade 4 Titanium vs. Ductile Cast Iron

Grade 4 titanium belongs to the titanium alloys classification, while ductile cast iron belongs to the iron alloys. There are 30 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 4 titanium and the bottom bar is ductile cast iron.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 200
160 to 310
Elastic (Young's, Tensile) Modulus, GPa 110
170 to 180
Elongation at Break, % 17
2.1 to 20
Poisson's Ratio 0.32
0.28 to 0.31
Shear Modulus, GPa 41
64 to 70
Shear Strength, MPa 390
420 to 800
Tensile Strength: Ultimate (UTS), MPa 640
460 to 920
Tensile Strength: Yield (Proof), MPa 530
310 to 670

Thermal Properties

Latent Heat of Fusion, J/g 420
270
Maximum Temperature: Mechanical, °C 320
290
Melting Completion (Liquidus), °C 1660
1160
Melting Onset (Solidus), °C 1610
1120
Specific Heat Capacity, J/kg-K 540
490
Thermal Conductivity, W/m-K 19
31 to 36
Thermal Expansion, µm/m-K 9.4
11

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 3.1
7.4
Electrical Conductivity: Equal Weight (Specific), % IACS 6.3
8.8 to 9.4

Otherwise Unclassified Properties

Base Metal Price, % relative 37
1.9
Density, g/cm3 4.5
7.1 to 7.5
Embodied Carbon, kg CO2/kg material 31
1.5
Embodied Energy, MJ/kg 500
21
Embodied Water, L/kg 110
43

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 100
17 to 80
Resilience: Unit (Modulus of Resilience), kJ/m3 1330
280 to 1330
Stiffness to Weight: Axial, points 13
12 to 14
Stiffness to Weight: Bending, points 35
24 to 26
Strength to Weight: Axial, points 40
17 to 35
Strength to Weight: Bending, points 37
18 to 29
Thermal Diffusivity, mm2/s 7.6
8.9 to 10
Thermal Shock Resistance, points 46
17 to 35

Alloy Composition

Carbon (C), % 0 to 0.080
3.0 to 3.5
Hydrogen (H), % 0 to 0.015
0
Iron (Fe), % 0 to 0.5
93.7 to 95.5
Nitrogen (N), % 0 to 0.050
0
Oxygen (O), % 0 to 0.4
0
Phosphorus (P), % 0
0 to 0.080
Silicon (Si), % 0
1.5 to 2.8
Titanium (Ti), % 98.6 to 100
0
Residuals, % 0 to 0.4
0