01
Monel K-500 Round Bar
Solid sections from 6 to 500 mm for shafts, valve stems and machined fittings.
Request Availability →Monel K-500 Bar and Rod
High-strength age-hardened nickel-copper bar and rod for marine shafts, fasteners and oil and gas equipment.
Aluminium and Titanium Verified
Al and Ti are reported on every EN 10204 3.1 certificate, so the age-hardening response is documented, not assumed.
NACE Hardness Control
Age-hardened bar is released inside the 24–35 HRC band for NACE MR0175 sour-gas service when your order requires it.
Condition Matched to Service
Annealed, age-hardened or cold-drawn stock is selected against your shaft, fastener or downhole duty before cutting.
PRODUCT OVERVIEW
About Monel K-500 Bar and Rod
Monel K-500 bar and rod carry the seawater corrosion resistance of the Monel 400 family into load-bearing parts. Aluminium and titanium let the UNS N05500 balance gain strength through age hardening rather than cold work alone.
Southerly Alloy supplies round bar, rod and finished sections to ASTM B865 and ASME SB865 in annealed, age-hardened and cold-drawn conditions. Pump shafts, fasteners and downhole tools are the usual destinations for this higher-strength nickel-copper bar.
PRODUCT FEATURES
Key Features of Monel K-500 Bar and Rod
Monel K-500 is a precipitation-hardened nickel-copper alloy that adds aluminium and titanium to the Monel 400 base for roughly three times the yield strength. Southerly Alloy supplies UNS N05500 bar and rod to ASTM B865 in annealed, age-hardened and cold-drawn conditions, with custom sizes, NACE hardness control and mill test documentation. Marine shafts, high-strength fasteners and oil and gas tools are typical buyers of this bar.
Monel K-500
Strength Through Age Hardening
Aluminium and titanium form hardening precipitates that lift yield strength to about 100 ksi, roughly three times the Monel 400 level.
01
Resistance to Reducing Media
Handles hydrofluoric acid, other non-oxidizing acids and alkalis under controlled service conditions.
02
Seawater and Salt-Solution Resistance
Performs in flowing seawater where many stainless grades pit or crack; review stagnant service for crevice risk.
03
Essentially Non-Magnetic
The alloy stays low in magnetic permeability at ambient temperature, which protects downhole survey accuracy.
04
Fatigue and Wear Resistance
Hardened bar resists cyclic loading and galling in shafts, stems and fastener threads.
05
Condition Range
Supplied annealed, age-hardened or cold-drawn to match the ASTM B865 strength tables.
06
Size and Section Flexibility
Round, square, hex, flat and forged bar run from stock sizes up to large sections.
07
Certification and Traceability
EN 10204 3.1 mill certificates with heat numbers travel with every delivery.
08
WHY CHOOSE US
Why Choose Monel K-500
Your Monel K-500 enquiry reaches the team that controls nickel-copper melting, aging and finishing on one site. We fix the heat-treatment condition to your duty, so strength, hardness and documentation promises stay realistic. One contact owns your order from quotation to shipment.
01
Specification Compliance
Your grade, condition, diameter and finish are checked against ASTM B865 before production starts.
02
Quality and Traceability
Heat numbers, EN 10204 3.1 certificates and PMI records are compiled per delivery.
03
Flexible Supply
One bar or one container load runs through the same qualified nickel-copper route.
04
Responsive Service
Quotations answer with condition, size and document commitments, not vague lead times.
MANUFACTURING PROCESS
Reliable Production For Critical Applications
Monel K-500 bar and rod are made from refined nickel and copper melted with aluminium and titanium into the UNS N05500 balance. Each heat is worked, solution-annealed and aged to the ordered condition, with test results recorded against the heat number.
01
Charge Preparation
Refined nickel and copper are weighed to the UNS N05500 balance, with aluminium and titanium added for age hardening.
02
Melting
The charge is melted in induction or electric-arc furnaces under practices that limit gas pickup and oxide content.
03
Casting
Molten metal is cast into ingots with solidification controls that limit segregation across the section.
04
Hot Working
Ingots are forged and rolled into billets and bars, refining the cast structure as the section is reduced.
05
Solution Annealing
Bars are heated and water-quenched to dissolve the hardening phase before aging is applied.
06
Aging
Controlled low-temperature aging forms Ni3(Ti,Al) precipitates that set strength and hardness.
07
Cold Finishing
Drawing, peeling or centreless grinding brings aged bar to final diameter, tolerance and surface.
08
Inspection and Release
Chemistry, hardness, tensile properties and dimensions are verified against the purchase specification before release.
Manufacturing Facility
MANUFACTURING CAPABILITY
Advanced Production For Nickel Alloy Products
Monel K-500 bar and rod are produced in standard and custom diameters, with condition, finish and cut length agreed before production. The figures below show the melting, aging and inspection capacity behind that commitment. Mixed-condition orders run as one campaign.
20,000+ m²
Factory Area
melting, aging, drawing and inspection workshops on one site.
50+
Production Machines
equipment covering hot working, cold finishing and final inspection.
600 Tons
Monthly Capacity
nickel-copper and nickel alloy bar output across standard and custom sizes.
30+
Technical Engineers
metallurgists who confirm condition, tolerance and documentation needs at quotation.
3
Age-Hardening Conditions
annealed, age-hardened and cold-drawn bar from one controlled route.
QUALITY ASSURANCE
Strict Quality Control From Production To Delivery
Monel K-500 bar leaves the works only after the ordered ASTM B865 requirements are demonstrated on the heat. Composition is checked by spectrometer, and hardness, tensile and dimensional tests run on the delivered condition. Records stay with the material for incoming verification.
01
Material Verification
Spectrometer analysis confirms the UNS N05500 balance and reports aluminium and titanium before bar enters production.
02
Dimensional Inspection
Diameter, straightness and length are measured to the applicable B865 tolerance class.
03
Testing and Inspection
Tensile, hardness and, where specified, UT or PMI are run on the ordered condition.
04
Certification and Traceability
EN 10204 3.1 documents link every bar back to its heat number.
PRODUCT FORMS
Available Product Forms
Round bar and rod carry most K-500 enquiries, with square, hex, flat and forged sections covering fabrication and machining needs. Each form below is a separately quoted product with its own condition and tolerance route.
02
Monel K-500 Round Rod
Smaller-diameter stock drawn to controlled straightness for precision machining.
Request Availability →
03
Monel K-500 Bright Bar
Cold-drawn bright surface for automatic lathes and appearance-critical parts.
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04
Monel K-500 Cold-Drawn Bar
Higher strength from the as-drawn condition, with stress relief where straightness matters.
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05
Monel K-500 Hex Bar
Hexagonal sections sized across flats for nuts, bolting and multi-flat parts.
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06
Monel K-500 Square and Flat Bar
Square and rectangular sections cut to your width, thickness and length.
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07
Monel K-500 Forged Bar
Larger diameters and custom sections with a controlled wrought structure.
Request Availability →
08
Centreless-Ground Rod
Ground diameter and straightness for shafting, spindles and precision components.
Request Availability →
APPLICATIONS
Engineered For Demanding Industries
Monel K-500 bar is specified where seawater, non-oxidizing acids or alkalis defeat stainless steels and Monel 400 lacks the strength. Most K-500 bar work reaches us through marine and oil and gas projects. Review age-hardened SCC risk for stagnant or sour service with our engineers.
Discuss Your Application →
01
Marine Pump and Propeller Shafts
High-strength shafts and rudder stock exposed to flowing seawater and cyclic load.
02
High-Strength Fasteners
Studs, bolts and nuts machined from bar for splash-zone and immersion bolting duty.
03
Oil and Gas Drill Collars
Non-magnetic collars and stabilizers for downhole tools in H2S-bearing brine.
04
Valve Stems and Trim
Hardened stems and seats that resist wear and galling in corrosive flow.
05
Offshore and Subsea Hardware
Components where strength and seawater resistance must coexist in one part.
06
Chemical Process Equipment
Pump components and mixer shafts in reducing and alkaline media.
07
Springs and Wear Parts
Elastic elements and scrapers that keep strength in corrosive, moderate-temperature service.
08
Brine and Salt-Handling Plant
Fixtures and fasteners in evaporators and salt concentration systems.
TECHNICAL INFORMATION
Technical Specifications
Detailed technical information including chemical composition, mechanical properties, standards and available dimensions.
Chemical Composition
The limits below follow ASTM B865 for UNS N05500 bar and rod, with nickel as the balance of the melt. Aluminium and titanium are the age-hardening additions that separate K-500 from Monel 400. The mill test certificate governs final acceptance.
| Element | Content |
|---|---|
| Nickel (Ni) plus Cobalt (Co) | 63.0% min. |
| Copper (Cu) | 27.0–33.0% |
| Aluminium (Al) | 2.30–3.15% |
| Titanium (Ti) | 0.35–0.85% |
| Iron (Fe) | 2.0% max. |
| Manganese (Mn) | 1.5% max. |
| Carbon (C) | 0.25% max. |
| Silicon (Si) | 0.50% max. |
| Sulfur (S) | 0.010% max. |
Mechanical Properties
Minimums are taken from ASTM B865 for UNS N05500 rod and bar and change with condition and section size. Annealed stock is soft and formable; age-hardened stock reaches full strength for direct assembly. Confirm the ordered condition at quotation.
| Condition | Tensile Strength, min. | Yield Strength (0.2%), min. | Elongation, min. |
|---|---|---|---|
| Annealed (Condition A) | ≥90 ksi (621 MPa) | ≥40 ksi (276 MPa) | 25% |
| Age-Hardened (Condition AH) | ≥140 ksi (965 MPa) | ≥100 ksi (690 MPa) | 15% |
Requirements above follow the ASTM B865 mechanical tables; the applicable edition and the ordered condition decide final acceptance.
Physical Properties
Typical room-temperature values below support design calculations rather than acceptance testing. Monel K-500 is essentially non-magnetic at ambient temperature, which suits downhole and electronic service.
| Property | Value |
|---|---|
| Density | Approx. 8.44 g/cm³ |
| Melting range | Approx. 1300–1350 °C |
| Modulus of elasticity | Approx. 179 GPa |
| Thermal conductivity at 20 °C | Approx. 17 W/m·K |
| Specific heat at 20 °C | Approx. 410 J/kg·K |
| Electrical resistivity at 20 °C | Approx. 0.62 µΩ·m |
| Thermal expansion, 20–100 °C | Approx. 14.0 µm/m·K |
| Curie temperature | Below ambient; essentially non-magnetic |
| Magnetic behaviour | Low permeability at ambient temperature |
Standards
ASTM B865 is the governing product specification for bar and rod, with ASME SB865 used in pressure equipment. The designations below are equivalent identifiers for cross-reference, not separate approvals. Quote the standard together with condition and section in your inquiry.
| Standard / Designation | Scope |
|---|---|
| ASTM B865 | Nickel-copper alloy bar, rod and forgings — UNS N05500 |
| ASME SB865 | ASME edition for bar, rod and forgings |
| AMS 4676 | Nickel-copper alloy bars, forgings and rings |
| QQ-N-286 | Federal specification for K-500 bolting and fasteners |
| UNS N05500 | Material designation for Monel K-500 |
| W.Nr. 2.4375 / NiCu30Al | European designation for Monel K-500 |
| JIS NW 5500 | Japanese designation |
| BS 3076 NA18 | British nickel-copper bar standard |
| DIN 17743 / DIN 17752 | Nickel-copper wrought alloys — chemistry and bar |
| NACE MR0175 / ISO 15156 | Material guidance for H2S-bearing service |
Dimensions
Ranges below reflect normally produced sections; exact availability depends on condition, finish and quantity, confirmed at quotation. Tolerances follow ASTM B865 for the ordered condition. State diameter, section, length and finish in the inquiry.
| Product Form | Typical Supply | Length |
|---|---|---|
| Round Bar | 6–500 mm dia. | Cut to length or random |
| Round Rod | 3–50 mm dia. | Cut to length |
| Bright Bar | 6–150 mm dia. | Cut to length or random |
| Square Bar | 10–150 mm | Cut to length or random |
| Hex Bar | 10–150 mm A/F | Cut to length or random |
| Flat Bar | 3–100 mm thick × 10–300 mm wide | Cut to length |
| Forged Bar | 100–500 mm dia. or forged section | Cut to length |
| Precision-Ground Rod | 3–100 mm dia., tight tolerance | Cut to length |
Diameters and lengths outside these ranges are reviewed against the production route before quotation.
Surface Finishes
Finish is selected for the next operation, whether machining allowance, fabrication or a finished appearance. Availability depends on diameter, condition and order quantity. Each finish is agreed with the order, not assumed from stock.
| Surface Condition | Typical Use |
|---|---|
| Hot-worked (as-rolled or forged) | Parts that will be machined to size |
| Annealed and pickled | Scale-free surface for fabrication |
| Cold drawn | Close diameter control with a bright surface |
| Age-hardened | Full-strength bar for shafts, fasteners and trim |
| Stress relieved | Straightness and dimensional stability for drawn bar |
| Peeled | Uniform diameter with machined skin for further turning |
| Centreless ground | Tight diameter and straightness for shafting |
| Polished | Reduced roughness for product-contact and visible parts |
TECHNICAL DOCUMENTATION
Download Technical Datasheet
Get detailed information including specifications, standards, dimensions and material properties.
HOW TO START
Start Your Order in 6 Simple Steps
One coordinator keeps your Monel K-500 order moving from first message to shipment. Strength and hardness depend on the ordered condition, so the aging route is fixed before cutting. Most quotations carry a confirmed lead time, and trial quantities help you verify a size first.
1
Send an Inquiry
Give the grade, ASTM B865 condition, diameter, length, quantity and finish.
2
Review Requirements
We match the ordered condition, tolerance and finish to the production route.
3
Receive a Quotation
Price and lead time come from size, quantity, condition and documents.
4
Confirm the Order
Grade, dimensions, inspection level and delivery terms are recorded before cutting.
5
Production and Heat Treatment
The heat is worked, solution-annealed and aged to the specified condition.
6
Shipment and Delivery
Certificates and export documents ship with the bar; terms are confirmed with you.
What Our Clients Say
Feedback from buyers and engineers who source nickel alloy materials from Southerly Alloy.
★★★★★
“The age-hardened Monel K-500 round bar we ordered for pump shafts arrived with hardness records inside the NACE band, and diameters machined clean without rework.”
★★★★★
“Cold-drawn K-500 rod held drawing tolerance across both batches, and the aluminium and titanium on the certificate matched UNS N05500 for our incoming review.”
★★★★★
“We ran a one-bar trial of age-hardened stock before the full order; straightness and surface were as agreed, so the production batch followed immediately.”
CERTIFICATIONS & QUALITY DOCUMENTATION
Certifications & Quality Documentation
Our production and inspection processes are certified to international standards, and every delivery ships with EN 10204 3.1 mill test certificates.
ISO 9001:2015
Quality Management System
PED 2014/68/EU
Pressure Equipment Directive
ASTM / ASME
Material Standards Compliance
EN 10204 3.1
Mill Test Certificates
FAQ
Frequently Asked Questions
Which ASTM specification covers Monel K-500 bar and rod?
ASTM B865 / ASME SB865.
What is your MOQ for Monel K-500 bar?
One bar for most stock diameters.
What are your trade terms for Monel K-500 bar?
Mainly FOB; EXW and CIF can be quoted as well.
How is the price of Monel K-500 bar calculated?
Mainly on weight, with the copper and aluminium share fixed at the quotation date.
What is the lead time for Monel K-500 bar?
7-15 days for stock sizes; about 25 days for custom diameters.
Do you provide EN 10204 3.1 or 3.2 certificates?
Yes. 3.1 comes with every heat; 3.2 is arranged on request.
Can Monel K-500 bar be supplied in the age-hardened condition?
Yes. Age-hardened bar ships with hardness records and 24–35 HRC control for NACE sour-gas service.
Can I get Monel K-500 bar in custom diameters?
Yes. Drawing, peeling and grinding cover sizes outside the stock range.
What export documentation is included?
CI, PL, B/L and MTC with every shipment; origin certificates on request.
How do Monel K-500 and Monel 400 differ for my application?
K-500 adds aluminium and titanium for age hardening, reaching about three times the yield strength of Monel 400 while keeping similar seawater resistance; choose 400 where formability or SCC caution applies.
REQUEST FOR QUOTATION
Need A Custom Alloy Solution?
Send the grade, ASTM B865 condition, diameter, quantity and finish to receive price, lead time and certificates in one reply. Strength and hardness are fixed before production, so the bar you approve is the bar that arrives.
Monel K-500 bar and rod are available in stock sizes or produced to your drawing, with single-bar trials accepted for many common diameters.
