Overview & Core Advantages

Monel Alloys are high-performance nickel-copper alloys (comprising approximately 67% Nickel and 30% Copper). As one of the most versatile corrosion-resistant alloys in industrial use, the Monel series is indispensable in marine engineering, chemical processing, and the oil and gas sectors.

Why Choose Monel Alloys?

• Superior Corrosion Resistance: Exceptional performance in hydrofluoric acid, fluorine gas, hot concentrated alkali solutions, and seawater.

• Zero Stress Corrosion Cracking (SCC): Virtually immune to chloride-ion stress corrosion cracking in most environments.

• Wide Temperature Range: Maintains high mechanical strength from sub-zero temperatures up to $480^circtext{C}$ ($900^circtext{F}$).

• Excellent Workability: High suitability for machining, welding, and thermoforming.

  
  

Monel R405: The Machining Specialist

R405 is the free-machining version of Alloy 400. The controlled addition of sulfur creates nickel-copper sulfides that act as chip breakers during machining.

• Key Applications: Ideal for high-volume production on automatic screw machines, including fasteners, valve parts, bolts, and nuts.

• Note: While it offers superior machinability, its welding properties are slightly lower than Monel 400.

Technical Specifications: Monel 400 vs. R405 vs. K500

This table provides a technical comparison to help you select the precise grade for your application requirements.

1. Chemical Composition (%)

2. Physical & Mechanical Properties