1. Product Properties
Dingsco Monel K-500 (UNS N05500 / W.Nr. 2.4375) is an age-hardenable nickel-copper alloy forging bar that combines the outstanding corrosion resistance of Dingsco Monel 400 with approximately three times the yield strength. The enhanced mechanical properties are achieved through the addition of aluminum and titanium to the nickel-copper base, followed by controlled age hardening that precipitates submicroscopic Ni3(Ti, Al) particles throughout the matrix.
| Product Name |
Dingsco Monel K-500 Nickel-Copper Alloy Forging Bar |
| UNS Number |
N05500 |
| Werkstoff Number |
2.4375 |
| Alloy Type |
Nickel-Copper, Age-Hardenable |
| Available Forms |
Round Bar, Flat Bar, Square Bar, Hexagonal Bar |
| Diameter Range |
φ6 mm – φ500 mm (Custom Sizes Available) |
| Length |
500 mm – 6000 mm (Cut-to-Length Available) |
| Surface Finish |
Black, Peeled, Polished, Machined |
| Brand |
Dingsco Monel |
2. Material Overview
Dingsco Monel K-500 is a premium nickel-copper alloy that delivers the exceptional corrosion resistance of Dingsco Monel 400 while offering approximately three times the yield strength. The dramatic increase in mechanical properties is achieved through the addition of aluminum (2.30–3.15%) and titanium (0.35–0.85%), which form submicroscopic Ni3(Ti, Al) precipitates during controlled age-hardening heat treatment.
A defining characteristic of Dingsco Monel K-500 is its virtual non-magnetic behavior, even at extremely low temperatures, making it irreplaceable for sensitive electronic instrumentation and oil-well surveying equipment. The alloy maintains excellent ductility and impact toughness across a wide temperature range while resisting corrosion in seawater, hydrofluoric acid, sulfuric acid, and alkaline environments.
Key Advantage vs. Dingsco Monel 400: Dingsco Monel K-500 provides roughly triple the yield strength while retaining the same proven corrosion resistance — enabling lighter component designs without sacrificing durability.
3. Chemical Composition
| Element |
Ni+Co |
Cu |
Al |
Ti |
Fe |
Mn |
Si |
C |
S |
| Content (%) |
63.0 min |
27.0–33.0 |
2.30–3.15 |
0.35–0.85 |
2.0 max |
1.5 max |
0.5 max |
0.25 max |
0.01 max |
4. Physical Properties
| Density |
8.44 g/cm³ (0.305 lb/in³) |
| Melting Range |
1315 – 1350°C (2400 – 2460°F) |
| Modulus of Elasticity (Tension) |
179 GPa (26.0 × 10³ ksi) |
| Modulus of Elasticity (Torsion) |
65 GPa (9.5 × 10³ ksi) |
| Poisson's Ratio (Aged, RT) |
0.32 |
| Magnetic Permeability |
Virtually Non-Magnetic, even at low temperatures |
| Curie Temperature |
< -73°C (< -100°F) |
5. Mechanical Properties
| Form & Condition |
Tensile Strength |
Yield Strength (0.2%) |
Elongation % |
Hardness |
| Hot-Finished, Annealed |
621–758 MPa (90–110 ksi) |
276–414 MPa (40–60 ksi) |
45–25 |
75–90 HRB |
| Hot-Finished, Annealed & Aged |
896–1138 MPa (130–165 ksi) |
586–827 MPa (85–120 ksi) |
35–20 |
24–35 HRC |
| Hot-Finished, Aged (Max) |
965–1310 MPa (140–190 ksi) |
690–1034 MPa (100–150 ksi) |
30–20 |
27–38 HRC |
| Cold-Drawn, Annealed & Aged |
896–1310 MPa (130–190 ksi) |
586–827 MPa (85–120 ksi) |
30–20 |
24–35 HRC |
| Cold-Drawn, As-Drawn & Aged |
931–1276 MPa (135–185 ksi) |
655–1103 MPa (95–160 ksi) |
30–15 |
25–41 HRC |
Recommended Age Hardening Procedure for Optimal Properties:
- Solution Anneal: 1800°F (982°C) for 30 minutes, followed by water quench
- Age Hardening: Hold at 1100–1125°F (593–607°C) for 16 hours
- Controlled Cooling: Furnace cool at 15–25°F (8–14°C) per hour to 900°F (482°C)
- Final Cooling: From 900°F to room temperature — furnace cool, air cool, or quench without rate restriction
Note: Age hardening causes an initial volume contraction of approximately 2.5 × 10⁻⁴ in/in.
6. Corrosion Resistance — Marine & Acidic Environment Comparison
Dingsco Monel K-500 delivers exceptional corrosion performance in seawater, hydrofluoric acid, and alkaline environments. The table below compares its corrosion rates against common marine and chemical processing alloys in key service media:
| Alloy |
UNS |
Seawater Crevice |
H₂SO₄ (10%, RT) |
HF Acid Resistance |
Alkaline (NaOH) |
Stress Corrosion Cracking |
| 316L SS |
S31603 |
Susceptible |
≤ 0.1 mm/yr |
Not Recommended |
Good |
Susceptible (Cl⁻) |
| Dingsco Monel 400 |
N04400 |
Excellent |
≤ 0.05 mm/yr |
Excellent |
Excellent |
Immune |
| Dingsco Monel K-500 |
N05500 |
Excellent |
≤ 0.05 mm/yr |
Excellent |
Excellent |
Immune |
| Inconel 625 |
N06625 |
Excellent |
≤ 0.02 mm/yr |
Good |
Excellent |
Immune |
| Super Duplex 2507 |
S32750 |
Very Good |
≤ 0.1 mm/yr |
Not Recommended |
Fair |
Resistant |
Dingsco Monel K-500 is virtually immune to chloride-induced stress corrosion cracking and exhibits outstanding resistance in hydrofluoric acid — a capability unique to nickel-copper alloys. Combined with its non-magnetic properties and high strength, it is the preferred material for marine fasteners, pump shafts, and subsea instrumentation.
7. Material Characteristics
3× Yield Strength of Dingsco Monel 400: Age hardening delivers approximately triple the yield strength while preserving the same excellent corrosion resistance.
Non-Magnetic: Virtually non-magnetic permeability at all service temperatures, including cryogenic conditions — ideal for sensitive electronic and geophysical instruments.
Exceptional Seawater Resistance: Outstanding resistance to pitting and crevice corrosion in marine environments, including high-velocity seawater flow.
HF Acid Compatibility: One of the few alloys with excellent resistance to hydrofluoric acid and fluorine-containing environments.
High Fatigue Strength: Superior fatigue resistance for dynamically loaded components in marine and oil & gas applications.
SCC Immunity: Virtually immune to chloride stress corrosion cracking, unlike austenitic stainless steels.
Age Hardenable: Controllable strength levels through heat treatment — annealed for maximum ductility or aged for maximum strength.
Cryogenic Toughness: Retains excellent ductility and impact toughness at sub-zero temperatures.
8. Product Image Gallery
9. Available Forms
| Form |
Size Range |
Surface Finish |
Condition |
| Round Bar |
φ6 – φ500 mm |
Black / Peeled / Polished |
Annealed / Aged / As-Forged |
| Flat Bar |
Thickness 5–100 mm, Width 20–300 mm |
Machined / Peeled |
Annealed / Aged |
| Square Bar |
10 × 10 – 200 × 200 mm |
Peeled / Polished |
Annealed / Aged |
| Hexagonal Bar |
6 – 100 mm (Across Flats) |
Peeled / Polished |
Annealed / Aged |
| Wire |
φ1.6 – φ6.35 mm (0.0625–0.250 in) |
Bright / Spring Temper |
Annealed / Spring Temper / Aged |
10. Typical Applications
| Marine Engineering |
Chains, cables, fasteners, springs, propeller shafts, pump shafts, and valve stems for seawater service |
| Oil & Gas |
Drill collars, well-surveying instruments, non-magnetic housings, safety lifts, downhole valves, and subsea manifold components |
| Chemical Processing |
Pump impellers, valve components, HF acid alkylation equipment, and alkaline process hardware |
| Pulp & Paper |
Doctor blades, scrapers, and digester components |
| Electronics |
Sensors, electronic components, non-magnetic housings, and precision instrument parts |
| Aerospace |
Non-magnetic structural components, cryogenic fasteners, and instrument-grade components |
11. Dingsco Monel — Professional Nickel Alloy Manufacturer
Dingsco Monel — Your Trusted Nickel Alloy Partner
Dingsco Monel is a premier manufacturer and supplier of high-performance nickel alloy forging products, serving global customers across marine, oil & gas, chemical processing, aerospace, and electronics industries. With decades of metallurgical expertise, we deliver consistently superior nickel alloy bars, forgings, and customized components.
QUALITY ASSURANCE:
Our mission is to provide our customers only with the best quality products. As an ISO 9001:2015, PED 2014/68/EC, and API 6A certified manufacturer, we enforce strict quality control at every production stage — from raw material inspection and in-process monitoring to final ultrasonic testing and dimensional verification. Every shipment is accompanied by full Mill Test Reports (MTR) and material certifications.
ISO 9001:2015 PED 2014/68/EC API 6A
SCIENCE AND TECHNOLOGY INNOVATION STRATEGY:
We pay close attention to customer needs, implement product innovation, and further leverage our company's full range of product types and material grades to provide customers with one-stop service. We pursue continuous improvement through material research, process optimization, and equipment upgrades.
COOPERATION:
We are pleased to help others and glad to acquire the hand of others. We actively participate in team meetings and support decision-making. We share our experience with each other and excel at cooperating with different types of colleagues across global markets.
12. Material Selection — Other Nickel Alloys Available
Dingsco Monel maintains a comprehensive inventory of nickel alloy grades to meet diverse application requirements. In addition to Dingsco Monel K-500, we supply:
Dingsco Monel 400UNS N04400
Excellent seawater & HF acid resistance
Marine & chemical piping
Dingsco Monel R-405UNS N04405
Free-machining version of 400
Fastener & screw machine stock
Inconel 625UNS N06625
High-temp superalloy, Mo- strengthened
Aerospace & chemical processing
Inconel 718UNS N07718
Age-hardenable, highest strength
Aerospace gas turbines
Incoloy 825UNS N08825
General acid corrosion resistance
Chemical processing equipment
Hastelloy C-276UNS N10276
Extreme wet corrosion resistance
Severe chemical environments
Alloy 400 (Annealed)UNS N04400
Ductile nickel-copper for forming
Marine & chemical tanks
Incoloy 925UNS N09925
Age-hardenable, H2S resistant
Sour gas wellhead equipment
Nimonic 80AUNS N07080
Creep resistant up to 815°C
Gas turbine blades & bolts
13. Customized Products
Dingsco Monel offers comprehensive customization services to meet your exact specifications:
- Custom Dimensions: Non-standard diameters, lengths, and cross-sectional profiles machined to your drawings
- Heat Treatment: In-house age hardening per your specified condition — annealed, half-hard, or fully aged to target hardness
- Precision Machining: CNC turning, milling, grinding, and drilling of forged bar stock for ready-to-assemble components
- Cut-to-Length Service: Precision saw cutting with ±0.5 mm tolerance
- Special Surface Finishes: Centerless grinding, bright polishing, and peel turning available
- Non-Destructive Testing: Ultrasonic testing (UT), liquid penetrant inspection (LPI), and positive material identification (PMI) per customer requirements
- Custom Packaging: Bar-end protection, rust-preventive coating, and export-grade crating tailored to destination and handling requirements
- Expedited Delivery: Priority production scheduling for urgent project timelines
Contact Dingsco Monel today for a competitive quote on Dingsco Monel K-500 forging bar — we respond to all inquiries within 24 hours.
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