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Storage Yard
Depleted UF6 Cylinder Storage Yard at a Gaseous Diffusion Plant Site

Properties and Applications of Heat-Treated Uranium Alloys (Ref. 1)


Alloy Density, g/cm3 Processing Hardness Yield Strength, MPa (ksi) Tensile Strength, MPa (ksi) Elongation Reduction in Area, % (a) Corrosion Resistance Used for Applications Requiring Precautions, Comments
Unalloyed U 19.1 Cast, ß- quenched, hydrogen outgassed 93 HRB 295 (43) 700 (101) 22 ... Poor Complex shapes, low strength requirements ...
Ualloyed U 19.1 alpha-rolled, Hydrogen Outgassed 94 HRB 270 720 (39) 31 ( 104) ... Poor Sheet, rod, formed parts, low strength requirements ....
U-0.75Ti 18.6 gamma-quenched 36 HRC 650 (94) 1310 (190) 31 52 Fair Moderate strength, high ductility Section thickness limitations, high residual stresses, low hydrogen required
U-0.75Ti 18.6 gamma-quenched, aged 380 C (715 F),6h 42HRC 965 (140) 1565 (227) 19 29 Fair High strength ,moderate ductility Section thickness limitations, high residual stresses, low hydrogen required
U-0.75Ti 18.6 gamma-quenched, aged 450 C (840F), 6h 52 HRC 1215 (176) 1660 (241) <2 <2 Fair Maximum hardness, low ductility Low ductility and toughness, very sensitive to stress-corrosion cracking if stressed
U-2.0Mo 18.5 gamma-quenched, aged 550 C (1020F), 5h 34 HRC 675 (98) 110 (160) 23 25 Poor Moderate strength, stresses ...
U-2.3Nb 18.5 gamma-quenched, aged 600C (1110F), 5h 32 HRC 545 (79) 1060 (154) 28 33 Fair Moderate strength, low residual stresses ....
U-4.5Nb 17.9 gamma-quenched, aged 260C (500F), 16h 42 HRC 900 1190 10 8 Good High strength, moderate corrosion resistance Reduced sensitivity to quench rate
U-6.0Nb 17.3 gamma-quenched 82 HRB 160 (23) 825 (120) 31 34 Excellent High corrosion resistance, high ductility Low sensitivity to quench rate
U-10Mo 16.3 gamma-quenched 28 HRC 900 (130) 930 (134) 9 30 Excellent High corrosion resistance, high strength Very low sensitivity to quench rate, very susceptible to stress-corrosion cracking
U-7.5Nb-2.5Zr 16.4 gamma-quenched 20 HRC 540 (78) 850 (123) 23 50 Excellent High corrosion resistance, moderate strength, high ductility Very low sensitivity to quench rate, very susceptible to stress corrosion cracking
(a) All based on high-purity alloys with low hydrogen contents


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