Monel 400® – K400

The following data is provided for informational purposes only. It was provided with permission by Special Metals at www.specialmetals.com 

Monel 400®, or K400 ( also known as UNS 04400), is used known for having high strength and resistance to most corrosive elements, especially saltwater.

Chemical Compostion

(%max., unless shown as range or min.)

NI (+CO) CU FE MG SI C S
Min./Max.
63
28.0-34.0
2.5
2.0
0.5
0.3
0.024

Common Fabrication Processes

K400 is generally softer then many steel alloys, and can be forged into nearly any shape. This includes:

  • Pumps and Shafts
  • Valves
  • Rings and Discs
  • Fasteners
  • Tanks (gasoline and freshwater)

Industries that Commonly use K400 Forgings:

  • Aerospace and Aviation
  • Industrial heat exchangers
  • Boiler feed water heaters
  • Power Generation
  • Marine engineering
  • Oil & Gasoline – tanks
  • Freshwater tanks
  • Chemical & hydrocarbon processing equipment
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