AISI 4130 steel is a versatile alloy, with good atmospheric corrosion resistance. As an alloy steel containing chromium and molybdenum as strengthening agents, AISI 4130 has good strength and toughness, weldability and machinability.
AISI 4130 Normalizing 4130 alloy steel:
This process is defined as heating a steel to a temperature above the ferrite to austenite transformation temperature, then cooling in air to a temperature well below this transformation temperature. The treatment may be carried out on forged or rolled products as a conditioning treatment prior to final heat treatment. Normalizing also serves to refine the structure of forgings that might have cooled non-uniformly from their forging operation. The nominal normalizing temperature for 4130 is 1650 º F (900 º C), but production experience may necessitate a temperature either 50 º F (10 º C) above or below this figure. In fact when forgings are normalized before, say, carburizing or hardening and tempering, the upper range of normalizing temperatures is used. When normalizing is the final heat treatment, the lower temperature range is used.
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