Alloy category	Examples
Stainless steels	3xx Austenitic, 4xx series hardenable, Duplex stainless, etc.
Carbon steels	10xx series, 11xx series, 12xx series, 15xx series,
High alloy steel	13xx through 97xx series
Tool steels	W series, S series, O series, A series, D series, H series.
Nickel based alloy	Hastalloys, Monel, Inconels.