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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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Welcome back Richard,
I very much believe that a hard edge would reveal a sufficient carbon content; along with suitable quenching. As for the damask, the patterns on the surface of this blade were rather small and uniform; reflecting early medieval damask; not Yemeni damask.
When you're free, please share your thoughts with me; regarding early medieval Arab blades and their chemical composition. Would also be interested to know that hardness measuring device; the Vickers....
Thanks a lot in advance, sir.