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Monel 400 Washers Suppliers & Exporters
If your marine hardware, hydrofluoric acid alkylation units, or subsea piping systems require excellent resistance to rapidly flowing seawater and reducing chemicals, you've reached the right source. As a premier Monel 400 Washers Supplier and Exporter, Aurum Overseas manufactures precision Plain, Spring, Lock, Square, and Conical fasteners to ASME B18.21.1, DIN 125, and ISO 7089 standards.
Our UNS N04400 Washers feature a solid-solution nickel-copper binary matrix engineered to deliver high toughness across sub-zero cryogenic temperatures up to 480°C (900°F). Supplied with full EN 10204 3.1 MTR certifications, our complete stock of Monel 400 fasteners is ready for immediate global dispatch.
We export these washers across North America (USA, Canada, Mexico), Europe (Germany, UK, France, Italy, Netherlands, Norway), the Middle East (UAE, Saudi Arabia, Qatar, Kuwait, Oman), and Asia-Pacific (Singapore, Malaysia, Australia).
Technical Specifications
| Parameter | Technical Specification / Standard Range |
|---|---|
| Material Grade | Monel 400 (Ni-Cu Alloy) |
| Forging Specification | ASTM B164 / ASME SB164 |
| UNS Designation | UNS N04400 |
| Manufacturing Standards | ASTM B127, ASME SB127, ASTM B164, ASME SB164 |
| Dimensional Specifications | ASME B18.21.1, DIN 125 A/B, DIN 127, DIN 9021, ISO 7089, ISO 7090 |
| Washer Types | Plain Washers, Spring Washers, Lock Washers, Square Washers, Conical Washers |
| Size Capability | Imperial: #4 to 4" NB | Metric: M3 to M100 |
| Thickness Range | 0.5 mm to 12 mm |
| Heat Treatment Condition | Annealed / Hot Worked |
| Hardness Limit | 75–88 HRB / 160 HB max |
Technical Properties & Chemical Composition
Equivalent Grades of Monel 400 Washers
| STANDARD | WERKSTOFF NR. | UNS | EN |
|---|---|---|---|
| Monel 400 | 2.4360 | N04400 | NiCu30Fe |
Chemical Composition of Monel 400 Washers
| Element | Composition (%) |
|---|---|
| Nickel (Ni) | 63.00 min |
| Copper (Cu) | 28.00 – 34.00 |
| Iron (Fe) | 2.50 max |
| Manganese (Mn) | 2.00 max |
| Silicon (Si) | 0.50 max |
| Carbon (C) | 0.30 max |
| Sulfur (S) | 0.024 max |
Mechanical Properties of Monel 400 Washers
| Property | Metric Value | Imperial Value |
|---|---|---|
| Ultimate Tensile Strength | 550 MPa min | 80,000 psi min |
| Yield Strength (0.2% Offset) | 240 MPa min | 35,000 psi min |
| Elongation (%) | 40% min | 40% min |
| Density | 8.80 g/cm³ | 0.318 lb/in³ |
| Melting Point | 1350°C | 2460°F |
Types of Monel 400 Washers
Aurum Overseas supplies a comprehensive range of Monel 400 washer configurations manufactured according to standard DIN, ASME, and ISO dimensional tolerances for multiple engineering assemblies.
Monel 400 Plain Washers
Monel 400 Spring Washers
Monel 400 Lock Washers
Monel 400 Square Washers
Monel 400 Conical Washers
Key Advantages
Seawater Bio-Fouling Resistance
High copper content resists marine organism attachment and cavitation erosion in high-velocity saltwater applications.
Hydrofluoric Acid Immunity
Exceptional stability in non-aerated hydrofluoric acid streams across all concentrations up to boiling points.
Cryogenic Impact Strength
Maintains exceptional ductile properties and tensile toughness at sub-zero liquefied gas temperatures without undergoing brittle transition.
Long-Term Cost Savings
Prevents stress cracking and premature fastener failure in marine salt-spray and deaerated water environments, reducing overall maintenance overhead.
Key Applications of Monel 400 Washers
| Industry Sector | Application | Operating Environment |
|---|---|---|
| Marine & Offshore | Propeller shafts, seawater intake valves, pump impellers, and splash zone bolting | High-velocity seawater, brackish currents, and marine salt atmospheres |
| Chemical Processing | Hydrofluoric acid alkylation units, distillation columns, and boiler feedwater heaters | Deaerated hydrofluoric acid, organic acids, and hot alkaline solutions |
| Oil & Gas Refining | Crude oil distillation towers, desalter units, and hydrocarbon heaters | Sour gas streams, chloride-laden process fluids, and hot hydrocarbon mixtures |
| Power Generation | Feedwater heaters, steam generator piping, and deaerator internal bolting | High-pressure deaerated water and high-purity steam |
| Salt Production | Evaporator bodies, crystallizer piping, and brine heating equipment | Concentrated sodium chloride solutions and aggressive industrial brine |
Quality Testing & Inspection
- Positive Material Identification (PMI): Spectrometric analysis verifies precise elemental proportions including Ni, Cu, Fe, and Mn fractions.
- Mechanical & Hardness Verification: Tensile, yield, and hardness testing guarantees compliance with specified mechanical property standards.
- Microstructural Audit: Metallographic evaluation confirms optimum solid-solution structure for consistent corrosion resistance.
- Dimensional Conformance: Precision optical comparator checks ensure tight adherence to ASME, DIN, and ISO specifications.
Global Export Markets
Aurum Overseas supplies fully certified Monel 400 Washers to industrial projects across:
USA
Canada
Mexico
Germany
United
Kingdom
France
Italy
Netherlands
Norway
UAE
Saudi
Arabia
Qatar
Kuwait
Oman
Singapore
Malaysia
Australia
Frequently Asked Questions
Monel 400 washers feature a high copper-nickel content that naturally inhibits bio-fouling and resists pitting and cavitation erosion in fast-moving marine environments.
Yes. Monel 400 is one of the premier alloys for non-aerated hydrofluoric acid service across various concentration ranges and elevated temperatures.
Monel 400 is virtually immune to chloride-induced stress corrosion cracking in industrial and marine aqueous environments.
Monel 400 fasteners maintain structural stability and corrosion resistance in continuous service up to 480°C (900°F) in oxidizing environments and higher in reducing conditions.
All shipments include complete EN 10204 3.1 Mill Test Reports covering heat chemistry, tensile properties, hardness values, and PMI verification.
Contact Aurum Overseas
Aurum Overseas provides rapid delivery of certified Monel 400 Washers for high-specification global infrastructure.
Contact our sales engineering team for technical assistance, material certifications, and rapid pricing.