Tantalum-Tungsten 2.5%
Tantalum-Tungsten 2.5% alloy is a high strength alloy for corrosion applications in heat transfer equipment, vessels, piping, etc., and all applications where tantalum’s physical properties are desired at a higher strength level than pure tantalum.
Typical Composition (ppm):
Ti 100 max Ni 100 max
Mo 200 max Si 25 max
Fe 100 max Nb 0.5% max
W 2.0 - 3.5 wt % Ta balance
C 50 max O 150 max
N 50 max H 15 max
Typical Properties:
Density at 20 oC: 16.66 g/cc, (.602 lb/in3)
Melting Point: 3014 oC (5457 oF)
Coefficient of Expansion (20o - 500oC): 3.6 x 10-6/oF
Thermal Conductivity (20o - 100 oC): 32 Btu/hr-ftoF
Specific Heat (100 oC): .0336 Btu/lboF
Electrical Resistivity (0o - 100 oC): 14.7 microhm ⋅ cm
Typical Ultimate Tensile Strength (20 oC): 45,000 - 55,000 psi
Typical Yield Strength (20 oC): 35,000 - 45,000 psi
Young's Modulus of Elasticity: 27 x 106 psi
Recrystallization Temperature: 1315 oC
Stress Relieving Temperature: 1095 oC
Hardness as Annealed (Typical): HV 115 - 160
HR 50 - 80
Thermal Neutron Absorption Cross Section: 21.3 b
Mechanical Properties (min):
0.2% %
Tensile Strength Yield Strength Elongation
Temp oC (psi) (psi) in 1"
20 50,000 35,000 20
100 48,000 30,000 15
200 42,000 27,400 10
250 40,000 25,500 10