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Originally Posted by Richard Furrer
Ahmed,
Yes and no.
I have held thousands of swords and tested quite a few. On a trip to India in 2007 the curators from The Wallace Collection had a vickers micro hardness tester and sampled many knives and swords with the device. Many were very good blades indeed, but not all. Many old blades are crap...very poor in construction, heat treating and chemistry...just like items of today.
One can only tell so much by looking and before sating anything is good or of particular metal it should be tested.
I am cleaning shop at present, but when I settle back into work I'll prepare a rough analog to the blade in question with 99% pure iron (modern material) and another in quenched and tempered crucible steel of 1.6% carbon. I think you will find the results, as I expect, to be nearly identical in a 45 degree flex. Heat treatment does not effect flex..it does dictate weather or not a blade takes a set at a given angle. If you want it flexible then make it thin.
As to what the ancients knew:
Not knowing what the elements are (i.e. carbon) means little..it was a craft not a modern science and craft folk need to know the material not the science...though an intimate knowledge does develop over time which one may say is akin to science in some fashion.
However, in order to discuss the item in question we need to have a means of conveying information and numbers are a way of doing this...numbers for chemistry,for resistance to flex for bend angle etc.
As to too thin...one can make a groove till one sees daylight out the other side..too thin is indeed possible. I have a micrometer which has a cut away center to allow for measuring the various thicknesses of blades. Some Arab daggers are so thin one may scarcely say they are there at all.
You held the sword so I am not in a position to argue what you saw and felt.
It appears to me that the grooves would have been cut/scraped cold and not hot forged. They are of a style that favors that technique.
As to blade pattern:
I can not tell from the photos what the steel may or may not be.
Pattern in blades can be due to many things...yes crucible steel is one, but so too is finely forged bloomery steel and even alloy banding.
All for now,
Ric
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I agree with most of what you say, but there's a question here:
Are you saying that wrought iron can be flexible and has the ability to spring back to its original position after you bend it to 45 degrees???
The patterns were read by me via a magnifying glass; although at al-Kindi's time, people were content to see the patterns with their naked eyes!!!
Maybe you could ask Topkapi to bring you a small sample of the blade of this sword. Maybe they'll accept (though this is far-fetched). Who knows??!