Turned Pig Iron to Wrought Iron by Furnace Heating

This page is the CodyCross answer for the clue below from Germany, Group 2193, Puzzle 2 (Albrecht Durer).

Question is: Turned Pig Iron to Wrought Iron by Furnace Heating

and the answer is: PUDDLED

Word Meaning:

PUDDLED — simple past and past participle of puddle

Definitions from Wiktionary.