Materials and Construction
Lead pipe is

All of these
Especially resistant to solutions containing H₂SO₄
Usually joined by burning (e.g. by melting to adjacent pieces with a torch)
Having very low elastic limit resulting in permanent deformation from either mechanical or thermal strain

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Materials and Construction
Pure nickel is

Ferromagnetic at room temperature
Not resistant to oxidation at high temperature
Ferromagnetic above its curie point (i.e., 415°C)
Having h.c.p. crystal lattice

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