![]() As only the ε-δ transition occurs during cooling, casting Pu-Ga is easier than casting pure plutonium. Subcritical testing showed that wrought and cast plutonium performance is the same. More modern pits are produced by casting. This method was used for forming the first nuclear weapon pits. It is suitable for shaping by hot pressing at about 400 ☌. Stabilized δ-phase Pu–Ga is ductile, and can be rolled into sheets and machined by conventional methods.
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