Wrought Iron has been used in building from the earliest days of civilization, wrought iron door furniture being commonplace in Roman times. The structural use of iron dates from the Middle Ages, when bars of wrought iron would be used occasionally to tie masonry arches and domes. This use of wrought iron in tension cast iron its use throughout the ascendancy of cast iron in the canal and railway ages, as cast iron is strong only in compression. The ill-fated first Tay Bridge was of cast iron beams tied with wrought iron.

The demand for higher dynamic loads in bridges and warehouse buildings, and the ever superior spans of train sheds towards the end of the nineteenth century, led the designers of buildings to buy the technology developed to build ships of iron, and make beams of riveted wrought iron rolled sections. By the turn of the century this had led to buildings completely framed in wrought iron, and later steel girder sections, and cast iron was once again relegated to an showy role.

Our main concern with wrought iron, though, will be in its application to gates and railings, frequently given an showy treatment by the blacksmith. There are wrought iron railings in Westminster Abbey from the thirteenth century, which, in essence show all the characteristics, which we have come to know as ‘wrought ironwork’. Although regularly lacking modern refinements such as symmetry and cuteness of line the fantastic age of British ironwork, known as the English style, started at the end of the seventeenth century.

A French fashion for the Baroque style in gates and railings, swept the country houses of Britain, following the import of craftsman by William and Mary, and the superior part of our national stock of excellent ironwork dates from the early years of the eighteenth century. After the rise of cast iron as an showy standard, wrought iron tended regularly to take a secondary role, owing to its comparative expense, each piece being made by hand, while castings could be repeated infinitely once the patterns were made. Technically, though, the craftsmen of the age of machines technically bettered their forebears, as indeed they must while making mechanical components, so that the showy blacksmith work of the nineteenth century displays a perfection of manufacture not seen before or since.

After the introduction of mild steel, cheap because of its ability to be mass produced, wrought iron, and the craft skills associated with it, gradually disappeared in accordance with the general decline of craft standards in the twentieth century, until the last ironworks stopped production in 1974. From 1982 Chris Topp & Co. and The Real Wrought Iron Company have made available a limited supply of puddled wrought iron. The subsequent years have brought a steadily rising demand, as the blacksmiths of Britain have slowly taken up again the very ancient skills.

WHAT IS WROUGHT IRON?

In its simplest definition ‘Wrought Iron’ is a specific type of iron, and the traditional material of the blacksmith, deriving its name from the word ‘wrought’, which is the medieval past tense of the verb ‘to work’. Wrought Iron factually means ‘worked iron’, which refers to the method of manufacturing the metal by working repeatedly below a hammer. In the past the work of the blacksmith therefore became known as ‘Wrought Ironwork’, a name that has persisted for the art form even though the metal in use may not be wrought iron. Today the common material of the blacksmith is Mild Steel which is a cheap manufacturing product lacking many of the virtues of its ancestor.

Wrought iron is best described as a two-component metal consisting of iron and a glass-like slag. The slags are in effect an impurity, the iron and the slag being in physical association, as contrasted to the chemical alloy relationship that generally exists between the constituents of other metals. Wrought iron is the only ferrous metal that contains siliceous slag and it is to this slag that wrought iron owes the properties, which are of interest to the conservator and the blacksmith.