Other important benefits of AISI 4130 include the ability to be easily hardened by heat treating or work hardening, and the ability to be case hardened using a process called carburizing. The added molybdenum helps to increase the toughness. The added chromium helps to increase the steels hardenability and also the corrosion resistance although other types of materials with more corrosion resisting properties should be considered if the material is to be used in a corrosive environment. The alloying elements found in AISI 4130 help to increase the strength to a level higher than that of AISI 1030, which can be increased even more using a proper hardening procedure. The added chromium and molybdenum help to give the steel different properties from its mild steel counterpart, AISI 1030, even though they have the same percentage of carbon. The “30” at the end of the grade number designates that it has approximately 0.30% carbon by weight. AISI 4130Ĭhromoly steel is actually alloy steel grade 4130. Chromoly falls under the the AISI 41xx designations, and it is important to be aware of the different properties and applications of chromoly steel when deciding which material you need. Chromoly steel is often used when more strength is required than that of mild carbon steel, though it often comes at an increase in cost. ![]() ![]() Chromoly steel is a type of low alloy steel that gets its name from a combination of the words “chromium” and “molybdenum” – two of the major alloying elements.
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