MONEL K500/UNS NO5500

MONEL® alloy K-500 (UNS N05500/ W.Nr. 2.4375) is a nickel-copper alloy which combines the excellent corrosion resistance of MONEL alloy 400 with the added advantages of greater strength and hardness. The increased properties are obtained by adding aluminum and titanium to the nickel-copper base, and by heating
under controlled conditions so that submicroscopic particles of Ni3 (Ti, Al) are precipitated throughout the matrix.

Product Introduction:

The MONEL K500, called UNS NO5500, has the same corrosion resistance as Alloy400, but with higher mechanical strength and hardness. It has good heat resistance and corrosion resistance and long-term structure stability. It is mainly used to manufacture turbine blades and gas turbine blades on aeroengines with operating temperatures below 750℃. For the manufacture of fasteners and springs on ships; Pump and valve parts on chemical equipment; Pulp blade on paper making equipment, etc.

Product features:

In addition to excellent mechanical properties such as high strength, corrosion resistance and non-magnetic properties, Monel K500 alloy also has the same corrosion resistance as Monel 400. As a pump shaft material, the alloy has no plastic-brittle transition temperature, so it is very suitable for various low-temperature equipment.
The chemical composition of the alloy is roughly the same as that of Monel 400, with the biggest difference being 2.3-3.15% AL and 0.30-1.00% TI. The microstructure of this alloy is the same as that of Monel 400 alloy except for the scattered NI3(AI.TI) precipitated phase.

Corrosion resistance:

Monelk-500 alloy has excellent corrosion resistance in fluorine gas, hydrochloric acid, sulfuric acid, hydrofluoric acid and their derivatives. At the same time, it is more resistant to corrosion in seawater than copper-based alloys. Monel500 is resistant to corrosion at concentrations of less than 85% sulfuric acid. Monel k-500 is one of the few important materials that can resist hydrogen and corrosion fluoric acid.
Water Corrosion: In most cases of water corrosion, Monel500 alloy not only has excellent corrosion resistance, but also corrosion and stress corrosion are rarely found, and the corrosion rate is less than 0.025mm/a.
High temperature corrosion: The highest temperature of Monel500 in the air with continuous Resistance is generally about 600℃, and in high temperature steam, the corrosion rate is less than 0.026mm/a. Due to the high nickel content of Monel500 alloy, it can resist the corrosion of anhydrous ammonia and ammoniation conditions below 585℃.

Chemical composition:

Grade	Main component	Min	Max
Monel K-500	Ni	63	/
	Cu	27	33
	Al	2.3	3.15
	Ti	0.35	0.85
	Fe	/	2
	Mn	/	1.5
	S	/	0.01
	C	/	0.25
	Si	/	0.5

Mechanical property:

Tensile Strength ob/MPa	Yield Strength op0.2/MPa	Elongation 05 /%
1100	790	20

Executive standard：

Product	ASTM Standard	ASME Standard	AME Standard
Sheet. Sheet. Strip	B127	SB127	4544
Seamless pipe	B163.B165	SB163.B165	4574
Welded pipe	B725	SB725
Bar. Cake	B865	SB865	4675.4676
forging	B564	SB564	4675
Wire rod			4730.4731

Application field

This alloy is mainly used in pump shaft, valve stem, conveyor scraper, oil well drilling ring, elastic parts, valve pad, etc., suitable for petroleum, chemical, shipbuilding, pharmaceutical, electronics sectors.
1. Seamless water pipes and steam pipes in power plants
2. Seawater exchangers and evaporators
3. Sulfuric acid and hydrochloric acid environment
4. Crude oil distillation
5. The pump shaft and propeller of the equipment are used in deep water
6. The nuclear industry uses equipment for uranium extraction and isotope separation
7. Manufacture pumps and valves for hydrochloric acid production equipment