Monel K500 Supplier & Manufacturer

Monel K500 (UNS N05500, W.Nr. 2.4375) is a precipitation-hardenable nickel-copper alloy strengthened by additions of aluminum and titanium. It retains the excellent corrosion resistance of Monel 400 while offering substantially higher strength, hardness, and wear resistance.

The alloy exhibits excellent resistance to seawater, sour gas environments, alkalis, and many chemical media. Because of its unique combination of mechanical strength and corrosion resistance, Monel K500 is widely used in marine engineering, offshore platforms, oilfield equipment, pump shafts, and valve components.

J&A Alloy supplies Monel K500 in bar, rod, plate, sheet, pipe, tube, forging, fasteners, and custom-machined components.

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Key Features of Monel K500

• Excellent seawater corrosion resistance
• Significantly stronger than Monel 400
• Outstanding wear resistance
• Excellent cavitation resistance
• High fatigue strength
• Good resistance to sour gas service
• Non-magnetic at low temperatures
• Excellent performance in marine environments
• Good resistance to chloride stress corrosion cracking

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Chemical Composition of Monel K500

Element	Content (%)
Nickel + Cobalt (Ni + Co)	≥ 63.0
Copper (Cu)	27.0 – 33.0
Aluminum (Al)	2.30 – 3.15
Titanium (Ti)	0.35 – 0.85
Iron (Fe)	≤ 2.0
Manganese (Mn)	≤ 1.5
Carbon (C)	≤ 0.25
Silicon (Si)	≤ 0.50
Sulfur (S)	≤ 0.01

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Corrosion Resistance

Property	Value
Tensile Strength	≥ 1100 MPa
Yield Strength (0.2%)	≥ 790 MPa
Elongation	≥ 20%
Hardness	27 – 35 HRC
Density	8.44 g/cm³
Melting Range	1288 – 1343°C

Monel K500 provides excellent resistance to:

• Seawater corrosion
• Marine biofouling
• Alkaline solutions
• Hydrofluoric acid
• Sour gas environments
• Chloride-containing media

The alloy performs exceptionally well in fast-flowing seawater and offshore environments where cavitation and erosion are major concerns.

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High Temperature Performance

Monel K500 maintains excellent strength and corrosion resistance at elevated temperatures.

Performance Characteristics

• Service temperature up to approximately 480°C
• Excellent fatigue resistance
• Good thermal stability
• Superior wear resistance
• Maintains mechanical properties in marine environments

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Available Forms

J&A Alloy supplies Monel K500 in:

• Round Bar
• Rod
• Shaft
• Plate
• Sheet
• Pipe
• Tube
• Wire
• Forgings
• Rings
• Fasteners
• Flanges
• Fittings

Custom dimensions available.

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Applications of Monel K500

Marine Engineering

• Propeller shafts
• Pump shafts
• Marine fasteners
• Offshore equipment

Oil & Gas

• Drill collars
• Valve trim
• Downhole tools
• Sour gas service equipment

Chemical Processing

• Pumps
• Valves
• Heat exchangers

Aerospace

• High-strength corrosion-resistant components

Power Generation

• Rotating equipment
• Turbine auxiliary components

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Monel K500 vs Monel 400

Property	Monel K500	Monel 400
UNS Number	N05500	N04400
Strength	Excellent	Moderate
Tensile Strength	≥ 1100 MPa	≥ 550 MPa
Yield Strength	≥ 790 MPa	≥ 240 MPa
Hardness	27–35 HRC	Approx. 65–85 HRB
Corrosion Resistance	Excellent	Excellent
Seawater Resistance	Excellent	Excellent
Wear Resistance	Excellent	Good
Cavitation Resistance	Excellent	Good
Machinability	Moderate	Good
Cost	Higher	Lower

Choose Monel K500 When

• High strength is required
• Wear resistance is critical
• Shaft applications are involved
• Offshore service conditions exist

Choose Monel 400 When

• Maximum corrosion resistance is needed
• Lower cost is preferred
• Strength requirements are moderate

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Welding & Fabrication

Monel K500 can be fabricated using conventional methods but requires special consideration because of its precipitation-hardening characteristics.

Welding Methods

• GTAW (TIG)
• GMAW (MIG)
• SMAW

Recommendations

• Weld in annealed condition
• Age harden after fabrication if required
• Use suitable nickel alloy filler metals

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Standards & Equivalent Grades

Standard	Grade
UNS	N05500
W.Nr.	2.4375
ASTM	B865
ASTM	B163
ASTM	B127
ASTM	B164
ASME	SB127
ASME	SB163
ASME	SB865
DIN	NiCu30Al
Common Trade Name	Monel K500 / Alloy K500

Equivalent Names

• Monel K500
• Alloy K500
• UNS N05500
• W.Nr. 2.4375

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Frequently Asked Questions

What is Monel K500 used for?

Monel K500 is widely used in marine shafts, offshore equipment, oilfield tools, pump components and valve trim.

Is Monel K500 stronger than Monel 400?

Yes. Monel K500 offers significantly higher strength and hardness through precipitation hardening.

Is Monel K500 suitable for seawater?

Yes. Monel K500 provides outstanding resistance to seawater corrosion, cavitation and marine biofouling.

Can Monel K500 be welded?

Yes, although welding is generally performed before age-hardening treatment.

What is the difference between Monel K500 and Monel 400?

Monel K500 maintains the corrosion resistance of Monel 400 while providing much higher strength, hardness, and wear resistance.

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Why Choose J&A Alloy

✔ ASTM and ASME compliant materials

✔ Full material traceability

✔ PMI testing available

✔ Third-party inspection support

✔ Custom machining and forgings

✔ Competitive factory-direct pricing

✔ Global export experience

Whether you require Monel K500 bar, shaft, plate, pipe, tube, or forgings, J&A Alloy delivers reliable nickel-copper alloy solutions for demanding marine and industrial applications.