Give you a recommendation of two manganese silicon steel: toughness is particularly strong, the manufacture of spring plates, spring coils and so on.

Tungsten chromium steel: hardness, toughness is very strong Make machine tools and molds, etc..

Other nickel-chromium steel (stainless steel): strong corrosion resistance, not easy to oxidize Manufacture of chemical production on the acid-resistant tower, medical equipment and daily necessities. Tungsten steel, manganese steel: great hardness, the manufacture of metalworking tools, tractor tracks and axles, etc.. Molybdenum steel: resistance to high temperatures, crankshafts for the manufacture of aircraft, especially hard tools.