Alloy K500

Introduction

Super alloys contain many elements in different combinations so as to achieve a desired result. They have the ability to function at very high temperatures and under severe mechanical stress, and also where high surface stability is required. They have good creep and oxidation resistance. There are three groups of alloys, namely cobalt-based, nickel-based, and iron-based alloys. Monel K-500 is an age-hardenable version of Monel 400 alloy. It has high strength and sea water corrosion resistance. The following datasheet gives more details about Monel K-500.

Equivalent Grades Of Alloy 255

Zeon Grade Alloy Name UNS EN / DIN / W Nr. Trademarks
Zeon500 Alloy K500 UNS N05500 2.4375 Monel K500

Chemical Composition Of Alloy K500

Element Content (%)
Nickel, Ni 66
Copper, Cu 29
Aluminum, Al 2.7
Iron, Fe 1
Manganese, Mn 0.7
Tungsten, W 0.6
Silicon, Si 0.25
Carbon, C 0.1
Sulfur, S 0.01

Physical Properties Of Alloy K500

Properties Metric Imperial
Density 8.45 g/cm³ 0.305 lb/in³
Melting point 1338°C 2440°F

Mechanical Properties Of Alloy K500

Properties Metric Imperial
Tensile strength 1000 MPa 145000 psi
Yield strength (at strain 0.200%) 655 MPa 95000 psi
Elongation at break 22% 22%
Reduction of area 40% 40%
Hardness, Rockwell C 27 27

Processing Alloy K500

Machinability Monel K-500 is machined in the annealed condition.
Forming Monel K-500 can be formed using standard methods in the annealed condition.
Welding: Monel K-500™ is welded using all conventional methods in the annealed condition. After this process, stress-relief annealing is performed for the finished weldment.
Heat Treatment Monel K-500™ is heat treated by annealing. It can also be precipitation-hardened by performing aging heat treatment.
Forging Monel K-500 is forged at 1038 to 1149°C (1900 to 2100°F) followed by quenching in water.
Hot Working Monel K-500 is hot worked at 872 to 1149°C (1600 to 2100°F) followed by quenching in water. It should not be cooled below 872°C (1600°F).
Cold Working Monel K-500™ can be cold worked using standard methods.
Annealing Monel K-500 is annealed at 1038°C (1900°F) followed by quenching in water.
Aging Annealed or slightly cold-worked material is age-hardened at 608°C (1125°F ) for 16 h followed by cooling in a furnace. Severely cold-worked material is aged at 538°C (1000°F) for 6 h followed by cooling in a furnace.
Applications Super alloy Monel K-500 is used in impellers, sea water pump shafts, and oil well industry for valve trim and other components.