About

Monel 400 bolts are made from a nickel-copper alloy (approximately 67% Ni, 23% Cu) known for its exceptional resistance to seawater, acids, and alkalis. This makes them highly valuable in marine, chemical, and oil & gas industries where corrosion resistance is critical.

Key Specifications of Monel 400 Bolts

• Material Grade: Monel 400 (UNS N04400, W.Nr. 2.4360/2.4361)
• Density: ~8.8 g/cm
• Tensile Strength: ~550 MPa
• Yield Strength: ~240 MPa
• Hardness: ~150 HB
• Melting Point: ~13001350C
• Corrosion Resistance: Excellent in seawater, hydrofluoric acid, sulfuric acid, and alkaline environments.
• Standards: ASTM B164 (bars), ASTM B366 (fittings), ASTM B564 (forgings), ASTM F467/F468 (fasteners).

Common Uses of Monel 400 Bolts

• Marine Industry: Shipbuilding, propeller shafts, seawater valves, and offshore platforms.
• Chemical Processing: Pumps, heat exchangers, and piping systems exposed to acids and alkalis.
• Oil & Gas Industry: Valves, flanges, and fasteners in sour gas and petroleum refining.
• Power Generation: Steam and boiler systems requiring resistance to high-temperature corrosion.
• Aerospace: Components exposed to corrosive and high-stress environments.

Comparison: Monel 400 vs Stainless Steel 316 Bolts

Why Choose Monel 400 Bolts?

• Outstanding seawater and chemical resistance.
• Reliable performance in acidic and alkaline environments.
• Durable under high stress and temperature.
• Long service life with minimal maintenance.
• Preferred for critical applications where stainless steel may fail.