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Grade 38 Titanium vs. ASTM B817 Type II

Both grade 38 titanium and ASTM B817 type II are titanium alloys. They have a moderately high 93% of their average alloy composition in common. There are 26 material properties with values for both materials. Properties with values for just one material (5, 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 II.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 110
100
Elongation at Break, % 11
3.0 to 13
Fatigue Strength, MPa 530
390 to 530
Poisson's Ratio 0.32
0.32
Reduction in Area, % 29
4.0 to 13
Shear Modulus, GPa 40
40
Tensile Strength: Ultimate (UTS), MPa 1000
900 to 960
Tensile Strength: Yield (Proof), MPa 910
780 to 900

Thermal Properties

Latent Heat of Fusion, J/g 410
400
Maximum Temperature: Mechanical, °C 330
350
Melting Completion (Liquidus), °C 1620
1580
Melting Onset (Solidus), °C 1570
1530
Specific Heat Capacity, J/kg-K 550
550
Thermal Expansion, µm/m-K 9.3
9.9

Otherwise Unclassified Properties

Base Metal Price, % relative 36
37
Density, g/cm3 4.5
4.6
Embodied Carbon, kg CO2/kg material 35
40
Embodied Energy, MJ/kg 560
650
Embodied Water, L/kg 160
220

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 110
26 to 120
Resilience: Unit (Modulus of Resilience), kJ/m3 3840
2890 to 3890
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 35
34
Strength to Weight: Axial, points 62
55 to 58
Strength to Weight: Bending, points 49
45 to 47
Thermal Shock Resistance, points 72
62 to 66

Alloy Composition

Aluminum (Al), % 3.5 to 4.5
5.0 to 6.0
Carbon (C), % 0 to 0.080
0 to 0.1
Chlorine (Cl), % 0
0 to 0.2
Copper (Cu), % 0
0.35 to 1.0
Hydrogen (H), % 0 to 0.015
0 to 0.015
Iron (Fe), % 1.2 to 1.8
0.35 to 1.0
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
Tin (Sn), % 0
1.5 to 2.5
Titanium (Ti), % 89.9 to 93.1
82.1 to 87.8
Vanadium (V), % 2.0 to 3.0
5.0 to 6.0
Residuals, % 0 to 0.4
0 to 0.4