The Right Alloys. The Right Results. No matter what the application, AMSCO can produce the right ferrous alloy to suit your needs. In addition to standard Hadfield's manganese at 12-18%, we offer many other manganese steels; as well as a variety of chrome-moly alloy steels, high strength, low alloy steels and heat resistant alloy steels. This family of alloys plus our custom special analysis steels offer real solutions to better meet the needs of our customers.