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ASTM B817 Type II vs. AWS ERTi-5

Both ASTM B817 type II and AWS ERTi-5 are titanium alloys. They have a moderately high 95% 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-5.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 100
110
Elongation at Break, % 3.0 to 13
10
Fatigue Strength, MPa 390 to 530
470
Poisson's Ratio 0.32
0.32
Shear Modulus, GPa 40
40
Tensile Strength: Ultimate (UTS), MPa 900 to 960
900
Tensile Strength: Yield (Proof), MPa 780 to 900
830

Thermal Properties

Latent Heat of Fusion, J/g 400
410
Maximum Temperature: Mechanical, °C 350
340
Melting Completion (Liquidus), °C 1580
1610
Melting Onset (Solidus), °C 1530
1560
Specific Heat Capacity, J/kg-K 550
560
Thermal Expansion, µm/m-K 9.9
9.6

Otherwise Unclassified Properties

Base Metal Price, % relative 37
36
Density, g/cm3 4.6
4.4
Embodied Carbon, kg CO2/kg material 40
38
Embodied Energy, MJ/kg 650
610
Embodied Water, L/kg 220
200

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 26 to 120
87
Resilience: Unit (Modulus of Resilience), kJ/m3 2890 to 3890
3250
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 34
35
Strength to Weight: Axial, points 55 to 58
56
Strength to Weight: Bending, points 45 to 47
46
Thermal Shock Resistance, points 62 to 66
63

Alloy Composition


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Aluminum (Al), % 5.0 to 6.0
5.5 to 6.8
Carbon (C), % 0 to 0.1
0 to 0.050
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 0.22
Nitrogen (N), % 0 to 0.040
0 to 0.030
Oxygen (O), % 0 to 0.3
0.12 to 0.2
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
88.2 to 90.9
Vanadium (V), % 5.0 to 6.0
3.5 to 4.5
Residuals, % 0 to 0.4
0