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Grade 38 Titanium vs. ASTM B817 Type I

Both grade 38 titanium and ASTM B817 type I are titanium alloys. They have a very high 96% of their average alloy composition in common. There are 30 material properties with values for both materials. Properties with values for just one material (1, in this case) are not shown.

For each property being compared, the top bar is grade 38 titanium and the bottom bar is ASTM B817 type I.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 110
100
Elongation at Break, % 11
4.0 to 13
Fatigue Strength, MPa 530
360 to 520
Poisson's Ratio 0.32
0.32
Reduction in Area, % 29
5.0 to 29
Shear Modulus, GPa 40
40
Tensile Strength: Ultimate (UTS), MPa 1000
770 to 960
Tensile Strength: Yield (Proof), MPa 910
700 to 860

Thermal Properties

Latent Heat of Fusion, J/g 410
410
Maximum Temperature: Mechanical, °C 330
340
Melting Completion (Liquidus), °C 1620
1600
Melting Onset (Solidus), °C 1570
1550
Specific Heat Capacity, J/kg-K 550
560
Thermal Conductivity, W/m-K 8.0
7.1
Thermal Expansion, µm/m-K 9.3
9.6

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 1.2
1.0
Electrical Conductivity: Equal Weight (Specific), % IACS 2.4
2.0

Otherwise Unclassified Properties

Base Metal Price, % relative 36
36
Density, g/cm3 4.5
4.4
Embodied Carbon, kg CO2/kg material 35
38
Embodied Energy, MJ/kg 560
610
Embodied Water, L/kg 160
200

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 110
30 to 120
Resilience: Unit (Modulus of Resilience), kJ/m3 3840
2310 to 3540
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 35
35
Strength to Weight: Axial, points 62
48 to 60
Strength to Weight: Bending, points 49
42 to 49
Thermal Diffusivity, mm2/s 3.2
2.9
Thermal Shock Resistance, points 72
54 to 68

Alloy Composition

Aluminum (Al), % 3.5 to 4.5
5.5 to 6.8
Carbon (C), % 0 to 0.080
0 to 0.1
Chlorine (Cl), % 0
0 to 0.2
Hydrogen (H), % 0 to 0.015
0 to 0.015
Iron (Fe), % 1.2 to 1.8
0 to 0.4
Nitrogen (N), % 0 to 0.030
0 to 0.040
Oxygen (O), % 0.2 to 0.3
0 to 0.3
Silicon (Si), % 0
0 to 0.1
Sodium (Na), % 0
0 to 0.2
Titanium (Ti), % 89.9 to 93.1
87 to 91
Vanadium (V), % 2.0 to 3.0
3.5 to 4.5
Residuals, % 0 to 0.4
0 to 0.4