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ASTM B817 Type II vs. AWS ERTi-2

Both ASTM B817 type II and AWS ERTi-2 are titanium alloys. They have 85% of their average alloy composition in common. There are 25 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 AWS ERTi-2.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 100
110
Elongation at Break, % 3.0 to 13
20
Fatigue Strength, MPa 390 to 530
190
Poisson's Ratio 0.32
0.32
Shear Modulus, GPa 40
40
Tensile Strength: Ultimate (UTS), MPa 900 to 960
340
Tensile Strength: Yield (Proof), MPa 780 to 900
280

Thermal Properties

Latent Heat of Fusion, J/g 400
420
Maximum Temperature: Mechanical, °C 350
320
Melting Completion (Liquidus), °C 1580
1670
Melting Onset (Solidus), °C 1530
1620
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
31
Embodied Energy, MJ/kg 650
510
Embodied Water, L/kg 220
110

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 26 to 120
64
Resilience: Unit (Modulus of Resilience), kJ/m3 2890 to 3890
360
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 34
35
Strength to Weight: Axial, points 55 to 58
21
Strength to Weight: Bending, points 45 to 47
24
Thermal Shock Resistance, points 62 to 66
27

Alloy Composition


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Aluminum (Al), % 5.0 to 6.0
0
Carbon (C), % 0 to 0.1
0 to 0.030
Chlorine (Cl), % 0 to 0.2
0
Copper (Cu), % 0.35 to 1.0
0
Hydrogen (H), % 0 to 0.015
0 to 0.0080
Iron (Fe), % 0.35 to 1.0
0 to 0.12
Nitrogen (N), % 0 to 0.040
0 to 0.015
Oxygen (O), % 0 to 0.3
0.080 to 0.16
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
99.667 to 99.92
Vanadium (V), % 5.0 to 6.0
0
Residuals, % 0 to 0.4
0