Materials and Construction
Wrought iron is

Highly resistance to acid corrosion
An alloy of iron, chromium & carbon
High carbon iron
Malleable & ductile; and hence is used for chain links, hooks & couplings

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Materials and Construction
Lead pipe is

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

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