Magnetic behavior
Low permeability and low Curie temperature support specialized electronic component designs.
Special-purpose nickel-copper electrical alloy
Monel 404 Strip, Sheet and Electrical Alloy Stock
A specialized nickel-copper alloy used in electrical and electronic components where controlled magnetic behavior, conductivity and reliable joining are important.
Representative product-form image. Confirm actual surface, dimensions and condition with the quotation.Material overview
Why industrial buyers specify Monel 404
Monel 404 uses a controlled nickel-copper composition with low limits on iron, manganese, silicon and aluminum. It is associated with low magnetic permeability, a low Curie temperature and good brazing behavior, and is normally purchased to a precise drawing or electrical-component specification.
Joining
Good brazing characteristics for electronic and hermetic assemblies.
Controlled chemistry
Low residual-element limits help maintain consistent electrical and magnetic properties.
Technical reference
Composition and purchasing data
Values below are published reference limits. The purchase order, applicable specification and mill test certificate control the supplied material.
Limiting chemical composition, weight %
| Element | Published limit |
|---|---|
| Nickel + cobalt | 52.0-57.0 |
| Copper | Balance, approximately 42.1-47.1 |
| Iron | 0.50 max |
| Carbon | 0.15 max |
| Manganese | 0.10 max |
| Silicon | 0.10 max |
| Sulfur | 0.024 max |
| Aluminum | 0.05 max |
Key material facts
- Designation
- UNS N04404; UNS N04404
- Density
- Approximately 8.91 g/cm3
- Strengthening
- Non-age-hardenable; properties are controlled through composition and cold-work or annealed condition.
- Temperature note
- Selected for specialized electrical service; allowable temperature depends on component design, joining method and required magnetic/electrical behavior.
- Common supply
- Strip, sheet, wire and specialty small-section stock by inquiry
Technical reference: manufacturer technical bulletin. Typical data is for material selection only and is not a design guarantee.
Common specifications
Standards buyers frequently reference
Specification editions and permitted product forms change. Send the exact standard, revision and condition shown on your drawing or material list.
| Product or requirement | Common reference |
|---|---|
| Electronic alloy products | ASTM F96 or buyer specification where applicable |
| Strip and sheet | Thickness, temper and edge condition to be confirmed |
| Small-section stock | Drawing-specific requirements by inquiry |
| Inspection | Chemistry, dimensions and certificate scope to be stated |
Availability is subject to grade, size, quantity, condition, certification and mill route. No standard listed here confirms stock.
Application areas
Where Monel 404 is commonly evaluated
Final material selection belongs to the buyer's qualified engineer and must consider temperature, stress, fabrication, corrosion medium and governing code.
Electronic components
Transistor capsules and specialized electronic hardware.
Sealed assemblies
Ceramic-to-metal seals and brazed component systems.
Precision electrical parts
Components requiring controlled permeability and stable electrical behavior.
Specialty fabrication
Thin strip and small-section parts produced to buyer drawings.
RFQ checklist
Information needed for an accurate quotation
Clear specifications shorten material matching and reduce repeated email clarification.
1. Grade and standard
Monel 404, UNS N04404, ASTM/AMS/EN standard and required revision.
2. Product and dimensions
Strip, sheet, wire and specialty small-section stock by inquiry. Include thickness, width, length, diameter and tolerances.
3. Condition
Annealed or cold-worked temper with thickness, edge, flatness and drawing requirements specified
4. Quantity
Pieces, kilograms or total project quantity, plus any trial-order requirement.
5. Inspection
MTC type, chemistry, mechanical tests, NDT, dimensional report and third-party inspection.
6. Delivery
Destination country or port, required date, packing and Incoterm preference.
Fast alloy inquiry
Send your Monel 404 size, quantity and destination.
We will review product form, specification, condition, certification and delivery requirements before preparing a targeted quotation.
Buyer questions
Monel 404 FAQ
Quick answers for initial sourcing. Confirm critical engineering requirements against the governing specification.
Is Monel 404 a general marine grade?
No. Monel 404 is primarily a specialized electrical and electronic alloy; Monel 400 is the more common general marine and chemical grade.
Why is the buyer drawing important for Monel 404?
Electrical components can depend on tight chemistry, temper, dimensions, magnetic behavior and joining requirements, so the drawing and acceptance criteria should accompany the RFQ.
What forms can be quoted?
Strip and sheet are typical inquiries, while wire or small-section stock should be confirmed against required dimensions, temper and quantity.
Related grades
Compare other core alloy pages
Use related pages to compare alloy families before sending your final material requirement.