Monel K-500: Complete Properties & Application Guide

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Overview

Monel K-500 (UNS N05500 / W.Nr. 2.4375) is a precipitation-hardened nickel-copper alloy that combines the excellent corrosion resistance of Monel 400 with the added advantage of greater strength and hardness. The additions of aluminum and titanium enable age hardening to nearly twice the strength of Monel 400.

Chemical Composition

The chemical composition of Monel K-500 is carefully controlled to achieve its unique combination of properties and performance characteristics.

Element	Min %	Max %
Nickel (Ni)	63.0	Balance
Copper (Cu)	27.0	33.0
Aluminum (Al)	2.30	3.15
Titanium (Ti)	0.35	0.85
Iron (Fe)	—	2.0
Carbon (C)	—	0.25
Manganese (Mn)	—	1.5
Sulfur (S)	—	0.01

Mechanical Properties at Room Temperature

The mechanical properties of Monel K-500 vary depending on product form and heat treatment condition. The data below represents typical values for solution-annealed material.

Property	Value
Tensile Strength	965 MPa
Yield Strength (0.2% offset)	690 MPa
Elongation in 2 inches	20%
Density	8.44 g/cm3
Melting Point	1335 °C
Max Service Temperature	480 °C

Corrosion Resistance

Excellent corrosion resistance in seawater, salts, and alkaline environments, comparable to Monel 400. Resistant to hydrogen embrittlement and stress corrosion cracking in marine environments. Good resistance to hydrofluoric acid and sulfuric acid at moderate concentrations.

Applications

The unique combination of properties makes Monel K-500 suitable for a wide range of demanding applications:

• Oil & Gas: Pump shafts, impellers, and valve components for sour gas service.
• Marine Engineering: Propeller shafts, pump shafts, and fasteners for seawater applications.
• Chemical Processing: Valves, pumps, and heat exchangers handling corrosive fluids.
• Aerospace: High-strength fasteners and springs requiring corrosion resistance.
• Electronic: Diaphragms and springs for precision instruments.

Available Product Forms

Hangbo Alloy Group manufactures and supplies Monel K-500 in the following product forms, conforming to ASTM, AMS, and ASME specifications:

• Round Bars: Diameters from 6 mm to 300 mm, hot-finished or cold-drawn, solution annealed.
• Seamless Tubes & Pipes: Sizes from 6 mm OD to 219 mm OD, various wall thicknesses.
• Plates & Sheets: Thicknesses from 0.5 mm to 50 mm, hot-rolled or cold-rolled.
• Forgings: Custom flanges, rings, discs, and complex shapes per customer drawing.
• Welding Wire: Diameters 0.8 mm to 5.0 mm, precision-wound coils and spools.

Related Standards

Standard	Description
ASTM B865	Bar and Rod
AMS 4676	Bar and Forging
ASTM B564	Forgings
QQ-N-286	Federal Specification
AMS 7240	Wire
ASTM B366	Fittings

Contact Us for Monel K-500

Hangbo Alloy Group maintains extensive inventory of Monel K-500 in all standard product forms. We can provide mill test certificates, third-party inspection reports (SGS, TUV), and custom processing services.

For quotations, material certifications, or technical consultation, contact our sales team or call +86-136-1165-6360. We typically respond within 10 minutes.