Marine NI · Ni-Cu Alloy
Nickel Alloy Monel 400
Nickel Alloy Monel 400 is a marine ni nickel alloy — seawater-resistant nickel-copper. Typical values: 240 MPa yield, 8.83 g/cm³, rated to 540 °C. Available for CNC machining, Sheet metal at FabDigit.
Properties
Typical room-temperature values in the O (annealed) condition. Metric first, imperial in gray. The bars show where Monel 400 sits against the other 11 nickel alloy grades in the catalog.
Datasheet
| Yield strength | 240 MPa35 ksi |
|---|---|
| Tensile strength | 580 MPa84 ksi |
| Hardness | 150 HB |
| Density | 8.83 g/cm³0.319 lb/in³ |
| Specific strength (yield ÷ density) | 27 |
| Min service temp | -200 °C-328 °F |
| Max service temp | 540 °C1,004 °F |
| Electrical conductivity | 3.4 % IACS2 MS/m |
| Machinability | Fair40 / 100 |
| Weldability | Very good75 / 100 |
| Formability | Very good75 / 100 |
| ISO 513 machining group | S |
Values are nominal handbook figures for design screening. Certified mill or lot data ships with every FabDigit order on request.
Against other nickel alloy grades
Strength versus weight in the nickel alloy family
Yield strength against density for every nickel alloy grade FabDigit runs. Monel 400 is highlighted; hover a dot for its name, or open the interactive family chart.
Manufacturability
The process limits FabDigit's quote engine applies to Monel 400. Design inside these and the part quotes instantly; outside them it routes to an engineer.
CNC machining
| Machinability | Fair40 / 100 |
|---|---|
| ISO material group | S.1 |
| Cutting speed (rough / finish) | 40 / 55 m/min |
| Minimum wall | 1.5 mm |
| Minimum internal radius | 2 mm |
| Drill depth limit | 3× diameter |
| Best surface (machined / polished) | Ra 1.6 / — |
| Hardenable after machining | No |
Sheet metal
| Formability | Better75 / 100 |
|---|---|
| Weldability | Better75 / 100 |
| Bendable | Yes |
Conditions and tempers
How Monel 400 is supplied and what each state is for. The default is what FabDigit quotes unless your drawing says otherwise.
| Condition | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness |
|---|---|---|---|---|---|
ODefault Annealed (O) | Softest — parts you will bend or deep-form; not for carrying load | — | — | — | — |
Cold Drawn Cold Work | Precision bar with finished OD — shafts, pins, less machining | — | — | — | — |
Heat treatment and post-processing
Operations FabDigit's suppliers routinely run on Monel 400, ranked by how often they make sense for this grade.
Heat treatment
| Age (Inconel 718 standard) | Inconel 718 AMS 5662 cycle |
|---|---|
| Solution Anneal | Dissolve carbides; reset austenite (stainless) |
| Hot Isostatic Press (HIP) | Eliminate porosity in cast / 3DP parts |
Post-processing
| Manual Deburr | Deburrstandard |
|---|---|
| Edge Break (0.5mm) | Deburr |
| Shot Peen | Blast |
| Electropolish | Polish |
| CMM Inspection | Inspection |
| FAI Report | Inspection |
| Individual Bag | Packaging |
Surface finishes for Monel 400
Coatings and treatments compatible with nickel alloy on the processes Monel 400 runs on. Pick them in the quote configurator or call them out on the drawing.
Passivation
- Electropolishing
Plating
- Gold Plating
- Silver Plating
Marking / Decoration
- Chemical Etching
- Dot Peen Marking
- Electro-chemical Etching
- Embossing / Debossing
- Ink Stamping
- Laser Marking
- Mechanical Engraving
- Steel Stamping
- Vibro Engraving / Scribing
Thermal Spray
- HVOF Coating
- Plasma Spray
Equivalent designations
Standards and trade names that resolve to Nickel Alloy Monel 400 in FabDigit's catalog. Equivalence is nominal — check the exact specification when certification matters.
- UNS
- N04400
- Trade names
- Monel
- Other
- Alloy 400
Stock forms
Raw-material forms FabDigit sources Monel 400 in.
Property data is compiled from published supplier and standards handbooks and normalised for comparison; hardness values on non-Brinell scales are converted approximately for charting only. Manufacturability limits are FabDigit quote-engine defaults and may be relaxed by engineering review. Nothing on this page is a certification — request mill certs, CoC or material test reports with your order.