Indian wootz steel

Timeline

1. 1071–1074Tamil Nadu mining districts · Tamil NaduCraftsmen sealed local iron ore and carbonaceous material in clay crucibles for smelting, slowly cooling to form high-carbon steel ingots; this method controlled carbon content and phosphorus and sulfur impurities, producing high-quality steel suitable for forging, relied upon by South Indian weapons workshops.
2. 1075–1078Coromandel Coast · Coromandel CoastWootz steel ingots were shipped from Coromandel ports, carried by the southwest monsoon to Persian Gulf and Red Sea ports, then transshipped to Damascus and elsewhere to be forged into patterned steel weapons; Arab and Persian merchant texts called this steel an Indian specialty.
3. 1078–1080Thanjavur · ThanjavurChola armies and local chieftains ordered wootz steel swords and spearheads from workshops; the high-quality steel became an important material for South Indian military equipment and royal gifts; metallurgical techniques were passed down through hereditary craftsman guilds.