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Grade 38 Titanium vs. Titanium 4-4-2

Both grade 38 titanium and titanium 4-4-2 are titanium alloys. They have a moderately high 93% of their average alloy composition in common. There are 29 material properties with values for both materials. Properties with values for just one material (2, in this case) are not shown.

For each property being compared, the top bar is grade 38 titanium and the bottom bar is titanium 4-4-2.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 110
110
Elongation at Break, % 11
10
Fatigue Strength, MPa 530
590 to 620
Poisson's Ratio 0.32
0.32
Reduction in Area, % 29
20
Shear Modulus, GPa 40
42
Shear Strength, MPa 600
690 to 750
Tensile Strength: Ultimate (UTS), MPa 1000
1150 to 1250
Tensile Strength: Yield (Proof), MPa 910
1030 to 1080

Thermal Properties

Latent Heat of Fusion, J/g 410
410
Maximum Temperature: Mechanical, °C 330
310
Melting Completion (Liquidus), °C 1620
1610
Melting Onset (Solidus), °C 1570
1560
Specific Heat Capacity, J/kg-K 550
540
Thermal Conductivity, W/m-K 8.0
6.7
Thermal Expansion, µm/m-K 9.3
8.6

Otherwise Unclassified Properties

Base Metal Price, % relative 36
39
Density, g/cm3 4.5
4.7
Embodied Carbon, kg CO2/kg material 35
30
Embodied Energy, MJ/kg 560
480
Embodied Water, L/kg 160
180

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 110
110 to 120
Resilience: Unit (Modulus of Resilience), kJ/m3 3840
4700 to 5160
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 35
34
Strength to Weight: Axial, points 62
68 to 74
Strength to Weight: Bending, points 49
52 to 55
Thermal Diffusivity, mm2/s 3.2
2.6
Thermal Shock Resistance, points 72
86 to 93

Alloy Composition

Aluminum (Al), % 3.5 to 4.5
3.0 to 5.0
Carbon (C), % 0 to 0.080
0 to 0.080
Hydrogen (H), % 0 to 0.015
0 to 0.015
Iron (Fe), % 1.2 to 1.8
0 to 0.2
Molybdenum (Mo), % 0
3.0 to 5.0
Nitrogen (N), % 0 to 0.030
0 to 0.050
Oxygen (O), % 0.2 to 0.3
0 to 0.25
Silicon (Si), % 0
0.3 to 0.7
Tin (Sn), % 0
1.5 to 2.5
Titanium (Ti), % 89.9 to 93.1
85.8 to 92.2
Vanadium (V), % 2.0 to 3.0
0
Residuals, % 0 to 0.4
0 to 0.4