Higher strength
Age hardening provides greater strength and hardness than Alloy 400.
Age-hardenable nickel-copper alloy
Monel K-500 Round Bar and Forged Material
An age-hardenable nickel-copper alloy combining Monel 400-type corrosion resistance with higher strength and hardness for shafts, fasteners and oil-and-gas components.
Representative product-form image. Confirm actual surface, dimensions and condition with the quotation.Material overview
Why industrial buyers specify Monel K-500
Alloy K-500 adds aluminum and titanium to a nickel-copper base. Controlled aging forms strengthening precipitates, providing substantially higher strength than Alloy 400 while retaining broadly similar corrosion behavior. Condition and heat treatment are essential RFQ details.
Marine service
Low corrosion rates in high-velocity seawater support pump-shaft and impeller applications.
Condition control
Annealed, hot-worked, cold-worked and aged conditions produce different properties and machining behavior.
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 | 63.0 min |
| Copper | 27.0-33.0 |
| Aluminum | 2.30-3.15 |
| Titanium | 0.35-0.85 |
| Iron | 2.0 max |
| Manganese | 1.5 max |
| Silicon | 0.5 max |
| Carbon | 0.25 max |
| Sulfur | 0.01 max |
Key material facts
- Designation
- UNS N05500; W.Nr. 2.4375
- Density
- 8.44 g/cm3
- Strengthening
- Precipitation hardening through controlled aging of aluminum- and titanium-bearing phases.
- Temperature note
- Application limits depend on age-hardened condition, stress, environment and governing code.
- Common supply
- Round bar, forged bar, wire, forgings and machined or cut blanks
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 |
|---|---|
| Rod, bar, wire and forgings | ASTM B865 |
| Bar and forgings | AMS 4676 |
| Fastener requirements | Specify drawing, condition and required mechanical properties |
| Inspection | State NDT, dimensional and certificate requirements on the RFQ |
Availability is subject to grade, size, quantity, condition, certification and mill route. No standard listed here confirms stock.
Application areas
Where Monel K-500 is commonly evaluated
Final material selection belongs to the buyer's qualified engineer and must consider temperature, stress, fabrication, corrosion medium and governing code.
Marine shafts
Pump shafts, impellers, chains, cables and high-strength marine hardware.
Oil and gas
Drill collars, instruments, non-magnetic housings, valves and safety-lift parts.
Chemical processing
Pump and valve components requiring strength plus corrosion resistance.
Fasteners and springs
High-strength bolts, springs and load-bearing corrosion-resistant parts.
RFQ checklist
Information needed for an accurate quotation
Clear specifications shorten material matching and reduce repeated email clarification.
1. Grade and standard
Monel K-500, UNS N05500, ASTM/AMS/EN standard and required revision.
2. Product and dimensions
Round bar, forged bar, wire, forgings and machined or cut blanks. Include thickness, width, length, diameter and tolerances.
3. Condition
Annealed, hot-worked or age hardened to the specified ASTM/AMS requirement
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 K-500 size, quantity and destination.
We will review product form, specification, condition, certification and delivery requirements before preparing a targeted quotation.
Buyer questions
Monel K-500 FAQ
Quick answers for initial sourcing. Confirm critical engineering requirements against the governing specification.
How does K-500 differ from Monel 400?
K-500 contains aluminum and titanium and can be age hardened for much higher strength, while retaining broadly similar corrosion resistance.
Is K-500 suitable for pump shafts?
It is a well-established pump-shaft material in marine service, but shaft design, condition, seawater velocity and mechanical-property requirements must be confirmed.
Why must the condition be included in the RFQ?
Age treatment controls strength, hardness, ductility and machinability. The same grade in different conditions is not interchangeable without engineering review.
Related grades
Compare other core alloy pages
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