Alloy K-500, UNS NO5500

Alloy K-500

 

Alloy K-500(UNS NO5500)

Summary

A precipitation-hardenable nickel-copper alloy that combines the corrosion resistance of alloy 400 with greater strength and hardness. It also has low permeability and is nonmagnetic to temperatures as lowas -101°. Used for pump shafts, oil-well tools and instruments, doctor blads and scrapers, springs, value rim, fasteners, and marine propeller shafts.

Standard Product Forms

Pipe, tube, sheet, strip, plate, round bar, flat bar, forging stock, hexagon and wire.

Chemical Composition Wt,%

 

Min

Max.

 

Min.

Max.

 

Min.

Max.

Ni

63.0

 

Cu

27.0

33.0

C

 

0.18

Cr

 

 

Co

 

 

Si

 

0.5

Fe

 

2.0

Al

2.3

3.15

P

 

 

Mo

 

 

Ti

0.35

0.85

S

 

0.01

W

 

 

Mn

 

1.5

N

 

 

Physical

Constants

Density,g/ 8.44

Melting Range,℃ 1315-1350

Typical Mechanical Properties

(Precipitation Hardened)

Tensile Strength, ksi 160

Mpa 1100

Yield Strength (0.2% Offset),ksi 115

Mpa 790

Elongation, % 20

 


Microstructure

alloy K-500 which is produced by adding aluminum and titanium to the basic MONEL nickel-copper composition also has a face-centered cubic structure. In the age-hardened condition a submicroscopic gamma prime Ni3Al phase is formed throughout the matrix.


Characters

Alloy k500 has excellent corrosion resistance in an extensive range of natural and chemical environments, excellent resistance to chloride-ion stress-corrosion cracking and very high strength and hardness.After age-hardening, Alloy K500 has approximately 2 to 3times higher mechanical properties than the nickel-copper alloy (Monel 400), high tensile properties up to about 650℃,good corrosion fatigue resistance and ow permeability with non-magnetic down to -135℃.


Corrosion Resistance

In general, the corrosion resistance of Alloy K500 is similar to that of Alloy 400. Excellent resistance is shown to a wide range of media from pure water to mineral acids, salts and alkalis. Alloy K500 is virtually immune to chloride-ionstress-corrosion cracking. In the aged condition, the alloy may be susceptible to stress-corrosion cracking in most, aerated hydrofluoric acid vapour at stresses near the yield strength. In high-velocity seawater and in marine atmospheres, good corrosion resistance is shown but, in slow-moving or stagnant seawater, pitting may occur. Nicorros Al also shows good resistance in sour-gas environment.


Applications

Alloy K500 finds wide application in the marine, chemical, petrochemical and shipbuilding industries.Typical applications include;

1. Valve seals, pump sleeves and wear rings in marine environments-high strength and resistance to seawater.

2. Doctor blads and scrapers;

3. Fasteners, e.g. Bolts, used in marine atmospheres and tidal waters - resistance to chloride-containing environments;

4. Towing cable armouring - high strength, non-magnetic properties and resistance to seawater;

5. Oil well drilling equipment such as non-magnetic drill collars, valves and instrumentation sleeves - resistance to chloride-containing nedia and sour-gas environments'

6. Springs - resistance to a variety of corrosive media;

7. Aviation instrument components - non-magnetic.


We have products:

seamless pipe,seamless tube,  

welded pipe,welded tube,

 

 

pipe fitting,flange,bar,plate


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