Unlike normal steel, which has a specific gravity of ~7.8 g/cm³, some fragments found near Merv (modern-day Turkmenistan) have recorded densities of nearly 8.2 g/cm³, suggesting a metallic composition we cannot replicate today without electric arc furnaces.
Perfect steel——was the Magisterium of metals: a balance so perfect that the sulfur and mercury could not separate. Because they could not separate, the steel could not cool down entirely; it existed in a state of suspended animation between solid and liquid. fuladh al haami
Medieval texts describe a test: A sheet of the finest silk was draped over a stack of 50 brass coins. A blade of ordinary Damascus steel would cut 10 coins. A blade of Fuladh al Haami was said to cut the silk, all 50 coins, and the stone table beneath—without losing its edge. Beyond physics, Fuladh al Haami occupies a massive space in Islamic Alchemy (Kimiya). The alchemist Jabir ibn Hayyan (Geber) theorized that metals were composed of "Sulfur" (the principle of combustibility) and "Mercury" (the principle of ductility). Unlike normal steel, which has a specific gravity of ~7
If you ask a historian: Yes, but metaphorical. The legend was used to sell expensive swords. Medieval texts describe a test: A sheet of