1. Core Strengths
Composition: It is a nickel-copper alloy (approx. 63% Ni, 28-34% Cu).

Key Property: Offers superb corrosion resistance in seawater, acids, and alkalis, and withstands extreme temperatures from cryogenic to 550°C.

Core Advantage: Its single-phase structure makes it immune to chloride stress corrosion cracking.

2. Versatile Applications

Marine Excellence: Ideal for propeller shafts, pump shafts, and fasteners due to its outstanding resistance to seawater and marine atmospheres.

Chemical Processing: Widely used in vessels, valves, and pumps handling acids like sulfuric and hydrofluoric acid (in specific conditions).

Oil & Gas Reliability: A trusted material for critical components in demanding oil and gas extraction and refining environments.

3. Practical Considerations for Reliable Performance

Mind the Environment: Its superior resistance to hydrofluoric acid is most effective in oxygen-free settings.

Enhance Performance: For extreme cases like microbial corrosion, combining Monel 400 with a PTFE coating can create a superior "base + barrier" defense.

Ensure Quality: Always source materials with certified mill test reports to guarantee composition, properties, and traceability.

MONEL 400 SHEET