Minerals and Metals in Ancient India v1.c20.s6.4

v1.c20.s6.4

The earliest evidence of hardening through quenching and tempered martensitic structure obtained so far, pertains to a third century BC iron sickle from Pāṇḍu Rājār Dhibi. There is a similar example in second century BC iron razor from Ror, Kangra. 0.7 per cent carbon iron equipments have come from Besnagar and Kauśāmbī during the pre-Christian era.