Titanium Alloys - Ti3Al2.5V Grade 9 and Grade 18

Material: Titanium Alloys - Ti3Al2.5V Grade 9 and Grade 18
Composition: Ti/3Al/2.5V
Property Minimum Value (S.I.) Maximum Value (S.I.) Units (S.I.) Minimum Value (Imp.) Maximum Value (Imp.) Units (Imp.)
Atomic Volume (average) 0.01 0.011 m3/kmol 610.237 671.261 in3/kmol
Density 4.47 4.49 Mg/m3 279.053 280.302 lb/ft3
Energy Content 750 1250 MJ/kg 81254 135423 kcal/lb
Bulk Modulus 101 122 GPa 14.6488 17.6946 106 psi
Compressive Strength 579.6 744 MPa 84.0639 107.908 ksi
Ductility 0.15 0.2 0.15 0.2 NULL
Elastic Limit 483 620 MPa 70.0532 89.9234 ksi
Endurance Limit 363 432 MPa 52.6487 62.6563 ksi
Fracture Toughness 70 75 MPa.m1/2 63.7033 68.2535 ksi.in1/2
Hardness 1030 1133 MPa 149.389 164.328 ksi
Loss Coefficient 0.001 0.002 0.001 0.002 NULL
Modulus of Rupture 531.3 682 MPa 77.0585 98.9157 ksi
Poisson's Ratio 0.35 0.37 0.35 0.37 NULL
Shear Modulus 33 36 GPa 4.78624 5.22136 106 psi
Tensile Strength 621 750 MPa 90.0684 108.778 ksi
Young's Modulus 91 95 GPa 13.1984 13.7786 106 psi
Glass Temperature K °F
Latent Heat of Fusion 360 370 kJ/kg 154.771 159.071 BTU/lb
Maximum Service Temperature 600 675 K 620.33 755.33 °F
Melting Point 1890 1900 K 2942.33 2960.33 °F
Minimum Service Temperature 0 K -459.67 °F
Specific Heat 535 545 J/kg.K 0.414014 0.421753 BTU/lb.F
Thermal Conductivity 7.5 7.7 W/m.K 14.0403 14.4147 BTU.ft/h.ft2.F
Thermal Expansion 7.9 8.1 10-6/K 14.22 14.58 10-6/°F
Breakdown Potential MV/m V/mil
Dielectric Constant NULL
Resistivity 120 126 10-8 ohm.m 120 126 10-8 ohm.m
Environmental Properties
  Resistance Factors
1=Poor 5=Excellent
Flammability 5
Fresh Water 5
Organic Solvents 5
Oxidation at 500C 4
Sea Water 5
Strong Acid 4
Strong Alkalis 4
UV 5
Wear 3
Weak Acid 5
Weak Alkalis 5