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Archeologists Baffled by Mysterious Viking Sword Made of ‘Crucible Steel’ 800 Years Before It Was Invented

 (Martin Kraft/CC BY-SA 3.0)


Archeologists Baffled by Mysterious Viking Sword Made of ‘Crucible Steel’ 800 Years Before It Was Invented


The famed Ulfberht Viking swords were made of metal so pure it baffled archaeologists. It was thought the technology to forge such metal was not invented for another 800 or more years, during the Industrial Revolution.

About 170 Ulfberhts have been found, dating from A.D. 800 to 1,000. A Nova National Geographic documentary titled “Secrets of the Viking Sword,” first aired in 2012, took a look at the enigmatic sword’s metallurgic composition.

In the process of forging iron, the ore must be heated to 1,650 degrees Celsius (3,000 degrees Fahrenheit) to liquify, allowing the blacksmith to remove the impurities (called “slag”). Carbon is also mixed in to make the brittle iron stronger. Medieval technology did not allow iron to be heated to such a high temperature, thus the slag was removed by pounding it out, a far less effective method.

The Ulfberht, however, has almost no slag, and it has a carbon content three times that of other metals from that age. It was made of a metal called “crucible steel.”

Epoch Times Photo
An Ulfberht sword found in the Volga Bulgars, what is now Russia. (Dbachmann/CC BY-SA 4.0)

It was thought that the furnaces invented during the Industrial Revolution were the first tools for heating iron to this range.

Modern blacksmith Richard Furrer of Wisconsin spoke to Nova about the difficulties of making such a sword. Furrer is described in the documentary as one of the few people on the planet who has the skills needed to reproduce the Ulfberht.

“To do it right, it is the most complicated thing I know how to make,” he said.

Epoch Times Photo
Drawings made in 1889 of four Ulfberht swords found in Norway. (Public Domain)

He commented that the Ulfberht maker would have been regarded as possessing magical powers. “To be able to make a weapon from dirt is a pretty powerful thing,” he said. But, to make a weapon that could bend without breaking, stay so sharp, and weigh so little would be regarded as supernatural.

Furrer spent days of continuous, painstaking work forging a similar sword. He used medieval technology, though he used it in a way perhaps never before considered. The tiniest flaw or mistake could have turned the sword into a piece of scrap metal. He seemed to declare his success at the end with more relief than joy.

It is possible that the material and the know-how came from the Middle East. The Volga trade route between the Viking settlements and the Middle East opened at the same time the first Ulfberhts appeared and closed when the last Ulfberhts were produced — a correlation that potentially supports such a thesis.

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