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Did you know that
the word “wrought” is the old past tense of the
verb to work. As irregular past-tense
forms in English have historically been phased
out over long periods of time, wrought
became worked. Wrought iron
literally means Worked iron. Wrought
iron is rarely completely pure. It is a fibrous
material with many strands of slag are mixed
into the metal. These slag inclusions give it a
"grain" like wood, and distinct look when
etched. Also due to the slag, it has a fibrous
look when broken or bent past its failure
point. The fibers of wrought iron gives it some
interesting properties, however. Hammering a
piece of wrought iron cold causes the fibers to
become packed tighter, which makes the iron both
brittle and hard. As wrought iron lacks the
carbon content necessary for tempering, it is
believed that cultures that never discovered how
to make steel would cold work wrought iron tools
in order to harden them. Source of
information:
Wikipedia. |