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ASTM B817 Type II vs. Grade 27 Titanium

Both ASTM B817 type II and grade 27 titanium are titanium alloys. They have 85% 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 ASTM B817 type II and the bottom bar is grade 27 titanium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 100
110
Elongation at Break, % 3.0 to 13
27
Fatigue Strength, MPa 390 to 530
170
Poisson's Ratio 0.32
0.32
Reduction in Area, % 4.0 to 13
34
Shear Modulus, GPa 40
41
Tensile Strength: Ultimate (UTS), MPa 900 to 960
270
Tensile Strength: Yield (Proof), MPa 780 to 900
230

Thermal Properties

Latent Heat of Fusion, J/g 400
420
Maximum Temperature: Mechanical, °C 350
320
Melting Completion (Liquidus), °C 1580
1660
Melting Onset (Solidus), °C 1530
1610
Specific Heat Capacity, J/kg-K 550
540
Thermal Expansion, µm/m-K 9.9
8.7

Otherwise Unclassified Properties

Base Metal Price, % relative 37
37
Density, g/cm3 4.6
4.5
Embodied Carbon, kg CO2/kg material 40
33
Embodied Energy, MJ/kg 650
530
Embodied Water, L/kg 220
320

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 26 to 120
70
Resilience: Unit (Modulus of Resilience), kJ/m3 2890 to 3890
240
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 34
35
Strength to Weight: Axial, points 55 to 58
17
Strength to Weight: Bending, points 45 to 47
21
Thermal Shock Resistance, points 62 to 66
21

Alloy Composition


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Aluminum (Al), % 5.0 to 6.0
0
Carbon (C), % 0 to 0.1
0 to 0.080
Chlorine (Cl), % 0 to 0.2
0
Copper (Cu), % 0.35 to 1.0
0
Hydrogen (H), % 0 to 0.015
0 to 0.015
Iron (Fe), % 0.35 to 1.0
0 to 0.2
Nitrogen (N), % 0 to 0.040
0 to 0.030
Oxygen (O), % 0 to 0.3
0 to 0.18
Ruthenium (Ru), % 0
0.080 to 0.14
Silicon (Si), % 0 to 0.1
0
Sodium (Na), % 0 to 0.2
0
Tin (Sn), % 1.5 to 2.5
0
Titanium (Ti), % 82.1 to 87.8
99 to 99.92
Vanadium (V), % 5.0 to 6.0
0
Residuals, % 0 to 0.4
0 to 0.4