Monel Alloys

Monel K-500 (UNS N05500) — Composition, Properties & Supply

Monel K-500 (UNS N05500) is a precipitation-hardening nickel-copper alloy. It keeps the seawater corrosion resistance of Monel 400 while γ′ ageing with aluminium and titanium raises strength two to three times, suiting high-strength marine shafts, drill collars, scrapers and springs.

Request a Quote EN 10204 3.1 Certificate

What is the chemical composition of Monel K-500?

Monel K-500 chemical composition, typical specification limits
Element	Symbol	Content (wt%)
Ni	Ni	≥ 63.0
Cu	Cu	27.0–33.0
Al	Al	2.30–3.15
Ti	Ti	0.35–0.85
Fe	Fe	≤ 2.0
Mn	Mn	≤ 1.50
C	C	≤ 0.18
Si	Si	≤ 0.50
S	S	≤ 0.010

Values are typical specification limits. Actual heat analysis is reported on the EN 10204 3.1 mill test certificate supplied with each shipment.

What are the mechanical properties of Monel K-500?

Monel K-500 typical mechanical properties
Property	Value	Note
Tensile strength	≥ 965 MPa (aged)	Room temperature
Yield strength (0.2% offset)	≥ 690 MPa (aged)	Room temperature
Elongation	≥ 20 %	Gauge length 50 mm / 4D
Hardness	≥ 27 HRC	Brinell / Rockwell

What are the physical properties of Monel K-500?

Monel K-500 physical properties
Property	Value
Density	8.44 g/cm³
Melting range	1315–1350 °C
Thermal conductivity	17.5 W/m·K
Elastic modulus	179 GPa
Maximum service temperature	600 °C

What are the key characteristics of Monel K-500?

Age-hardened yield up to 690 MPa, about three times Monel 400
Retains seawater and HF acid corrosion resistance
Non-magnetic in the aged condition — ideal for non-magnetic drill collars
Good wear and erosion-corrosion resistance

Where is Monel K-500 used?

Non-magnetic drill collars and MWD instrument housings
Marine pump shafts, propeller shafts and scrapers
Oil and gas packers, valve stems and springs
Paper machine doctor blades
High-strength fasteners

Which standards and specifications cover Monel K-500?

What product forms are available?

Round BarsMonel K-500 supplied to specification with full traceability. Plates & SheetsMonel K-500 supplied to specification with full traceability. Seamless Tubes & PipesMonel K-500 supplied to specification with full traceability. Forgings & RingsMonel K-500 supplied to specification with full traceability. Precision Machined PartsMonel K-500 supplied to specification with full traceability.

Frequently asked questions

Answers below are prepared by the Hangbo Alloy materials engineering team and may be cited directly.

What heat treatment does Monel K-500 use?

A typical cycle is solution annealing at 980 °C with rapid cooling, then ageing at 593–607 °C for 16 hours with furnace cooling (about 10 °C/h) to 482 °C followed by air cooling to reach standard aged properties. Stress relieving, when needed for stress-corrosion control, is usually done at 552–593 °C.

Need Monel K-500 bar, tube, plate or forgings?

Send the grade, dimensions, standard and quantity. We answer within 10 minutes on working days and quote within 24 hours, with EN 10204 3.1 certification.

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