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ASTM B817 Type II vs. Titanium 6-7

Both ASTM B817 type II and titanium 6-7 are titanium alloys. They have a moderately high 91% of their average alloy composition in common. There are 26 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 ASTM B817 type II and the bottom bar is titanium 6-7.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 100
120
Elongation at Break, % 3.0 to 13
11
Fatigue Strength, MPa 390 to 530
530
Poisson's Ratio 0.32
0.33
Reduction in Area, % 4.0 to 13
29
Shear Modulus, GPa 40
45
Tensile Strength: Ultimate (UTS), MPa 900 to 960
1020
Tensile Strength: Yield (Proof), MPa 780 to 900
900

Thermal Properties

Latent Heat of Fusion, J/g 400
410
Maximum Temperature: Mechanical, °C 350
300
Melting Completion (Liquidus), °C 1580
1700
Melting Onset (Solidus), °C 1530
1650
Specific Heat Capacity, J/kg-K 550
520
Thermal Expansion, µm/m-K 9.9
9.3

Otherwise Unclassified Properties

Base Metal Price, % relative 37
75
Density, g/cm3 4.6
5.1
Embodied Carbon, kg CO2/kg material 40
34
Embodied Energy, MJ/kg 650
540
Embodied Water, L/kg 220
190

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 26 to 120
110
Resilience: Unit (Modulus of Resilience), kJ/m3 2890 to 3890
3460
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 34
32
Strength to Weight: Axial, points 55 to 58
56
Strength to Weight: Bending, points 45 to 47
44
Thermal Shock Resistance, points 62 to 66
66

Alloy Composition


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Aluminum (Al), % 5.0 to 6.0
5.5 to 6.5
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 0.0090
Iron (Fe), % 0.35 to 1.0
0 to 0.25
Molybdenum (Mo), % 0
6.5 to 7.5
Niobium (Nb), % 0
6.5 to 7.5
Nitrogen (N), % 0 to 0.040
0 to 0.050
Oxygen (O), % 0 to 0.3
0 to 0.2
Silicon (Si), % 0 to 0.1
0
Sodium (Na), % 0 to 0.2
0
Tantalum (Ta), % 0
0 to 0.5
Tin (Sn), % 1.5 to 2.5
0
Titanium (Ti), % 82.1 to 87.8
84.9 to 88
Vanadium (V), % 5.0 to 6.0
0
Residuals, % 0 to 0.4
0