MONEL alloy K-500 is designated as UNS N05500 and Werkstoff Nr. 2.4375. It is listed in NACE MR-01-75 for oil and gas service.
Plate, Sheet, and Strip: BS3072NA18 (Sheet and Plate), BS3073NA18 (Strip), QQ-N-286 (Plate, Sheet and Strip), DIN 17750 (Plate, Sheet and Strip), ISO 6208 (Plate, Sheet and Strip). It is a age hardened alloy, whose basic composition makeup consists of elements like Nickel & Copper. Which combines the corrosion resistance of Alloy 400 with the high strength , fatigue resistance and erosion resistance.MONEL K500 is a nickel-copper alloy, precipitation hardenable through additions of aluminium and titanium. MONEL K500 has excellent corrosion resistant characteristics. These characteristics are similar to Monel 400. When in the age-hardened condition, Monel K-500 has a greater tendency toward stress-corrosion cracking in some environments than Monel 400. Alloy K-500 has approximately three times the yield strength and double the tensile strength when compared with alloy 400. Plus, it can be further strengthened by cold working prior to precipitation hardening. The strength of this nickel steel alloy is maintained to 1200° F but stays ductile and tough down to temperatures of 400° F. Its melting range is 2400-2460° F.

This nickel alloy is spark resistant and non-magnetic to -200° F. However, it is possible to develop a magnetic layer on the surface of the material during processing. Aluminum and copper may be selectively oxidized during heating, leaving a magnetic nickel rich film on the outside. Pickling orbright dipping in acid can remove this magnetic film and restore the non-magnetic properties.

• Chemical Properties of Monel K500

• Application

. Sour-gas service applications
. Oil and gas production safety lifts and valves
. Oil-well tools and instruments like drill collars
. Oil well industry
. Doctor blades and scrapers
. Chains, cables, springs, valve trim, fasteners for marine service
. Pump shafts and impellers in marine service

• ,Mechanical Properties

  Typical Room Temperature Tensile Properties of Annealed Material

  Product Form	Condition	Tensile (ksi)	.2% Yield (ksi)	Elongation %	Hardness
  Rod & Bar	Hot-Finished/Aged	140-190	100-150	30-20	27-38 HRC
  Rod & Bar	Hot Finished/Annealed	90-110	40-60	45-25	75-90 HRB
  Rod & Bar	Hot Finished/Annealed/Aged	130-165	85-120	35-20	24-35 HRC
  Rod & Bar	Cold-Drawn/Aged	135-185	95-160	30-15	25-41 HRC
  Rod & Bar	Cold-Drawn/Annealed/Aged	130-190	85-120	30-20	24-35 HRC
  Plate	ot-Finished/Aged	140-180	100-135	30-20	27-37 HRC
  Sheet	Cold-Rolled/Annealed	90-105	40-65	45-25	85 HRB Max