Monel K500 Pipe
Steel Pipe & Tubes has been a leading supplier of Monel piping solutions.
What are Monel K500 Pipe / Tubes?
Monel K500 Pipes and Tubes are premium-grade nickel copper alloys that deliver an exceptional combination of strength, toughness, and corrosion resistance. Engineered with the addition of aluminum and titanium, Alloy K500 offers significant improvements over its predecessor, Monel 400, particularly in terms of hardness, yield strength and wear resistance. This makes it a material of choice in environments where both mechanical performance and long-term durability are critical.
Unlike conventional alloys, Monel K500 maintains its integrity in seawater, sour gas, chemical acids, and alkaline solutions, which often cause rapid deterioration in other materials. Its ability to withstand chloride-induced stress cracking, cavitation, and pitting makes it indispensable in harsh industrial and marine environments. Additionally, Monel K500 retains excellent properties at cryogenic temperatures and elevated heat ranges, giving it wide versatility across industries.
For industrial buyers, engineers, and procurement professionals, Monel K500 Pipes and Tubes offer a low-maintenance, high-performance solution that reduces downtime and extends operational life. Whether used in oil & gas wells, marine propeller shafts, or chemical processing equipment, Alloy K500 ensures safety, reliability and cost-efficiency throughout its service cycle.
High-Quality Monel K500 Pipe Manufacturer in India – Trusted Alloy UNS N05500 Tubing Supplier
We take pride in being recognized as one of the leading manufacturers and global suppliers of Monel K500 Pipes and Tubes. With decades of technical expertise and a strong focus on quality assurance, we have established ourselves as a reliable partner for industries that demand high-performance nickel alloys.
Our state-of-the-art manufacturing facilities in India are equipped with precision machinery, heat-treatment furnaces, and testing equipment that comply with international quality standards. Every pipe and tube we produce undergoes stringent inspection processes at each stage of production from raw material procurement to final delivery. This ensures that our Monel K500 products consistently meet the mechanical, chemical and dimensional requirements of ASTM B865 / ASME SB865 standards.
What makes Stellar Alloys a trusted name among EPC contractors, oil & gas companies, chemical plants, shipbuilders, and aerospace suppliers is our ability to deliver seamless, welded, ERW, EFW, and fabricated pipes with complete traceability and certification. Each product is supplied with Material Test Certificates (EN 10204 3.1 / 3.2), third-party inspection approvals (Lloyds, TUV, SGS), and compliance with NACE MR0175 standards, ensuring reliability for critical applications.
In addition to high-quality production, we also emphasize timely delivery and global supply chain efficiency. With a robust stockholding capacity and a distribution network that spans Asia, Europe, the Middle East, and the Americas, Stellar Alloys can quickly fulfill both bulk project requirements and customized orders. Our export expertise ensures safe packaging, accurate marking, and seamless logistics support, reducing delays and costs for our clients.
Types of Monel K500 Pipe (Seamless, Welded, ERW, EFW, Fabricated)
Monel K500 Pipes are available in different forms to suit varied industrial applications. Each type offers unique advantages depending on pressure conditions, fabrication needs, and cost-effectiveness. Below is a detailed breakdown of the different types of Monel K500 pipes:
Monel K500 Pipe
UNS N05500 Welded Pipe
Alloy K500 Seamless Pipe
ASTM B865 Alloy K500 Seamless Pipe Size Range
Monel K500 seamless pipes are manufactured in a wide variety of diameters and wall thicknesses to meet diverse industrial requirements. The table below provides an overview of the standard size ranges available, ensuring suitability for both high-pressure applications and custom-engineered projects.
| Specification | Range Available |
| Outside Diameter (OD) | 6 mm – 273 mm (¼” – 10¾”) |
| Wall Thickness (WT) | 1 mm – 30 mm (Sch 5 to Sch 160) |
| Length | Up to 12 meters (Single Random, Double Random, or Custom Cut Lengths) |
| Form | Seamless, round tubes and pipes |
| Delivery Condition | Solution Annealed / Age Hardened |
Monel K500 Pipe Schedule Chart
Pipe schedules indicate the wall thickness of pipes for different diameters, which directly impacts their pressure-handling capacity. Monel K500 pipes are available in multiple schedules to suit applications ranging from low-pressure fluid transfer to high-pressure industrial systems. The chart below gives an overview of common schedules with corresponding wall thickness values.
| Nominal Pipe Size (NPS) | OD (mm) | Schedule 10 (WT mm) | Schedule 20 (WT mm) | Schedule 40 (WT mm) | Schedule 80 (WT mm) | Schedule 160 (WT mm) |
| ½” | 21.3 | 2.11 | 2.77 | 2.77 | 3.73 | 4.78 |
| 1″ | 33.4 | 2.77 | 3.38 | 3.38 | 4.55 | 6.35 |
| 2″ | 60.3 | 2.77 | 3.91 | 5.54 | 7.01 | 8.74 |
| 3″ | 88.9 | 3.05 | 5.49 | 5.49 | 7.62 | 11.13 |
| 4″ | 114.3 | 3.05 | 6.02 | 6.02 | 8.56 | 13.49 |
| 6″ | 168.3 | 3.40 | 7.11 | 7.11 | 10.97 | 18.26 |
| 8″ | 219.1 | 3.76 | 8.18 | 8.18 | 12.70 | 23.01 |
| 10″ | 273.1 | 4.19 | 9.27 | 9.27 | 12.70 | 25.40 |
UNS N05500 Monel K500 Tubing Dimensions (Inch to MM)
Monel K500 Tubes are manufactured in both imperial (inch) and metric (mm) measurements to serve global project requirements. Having a reliable conversion between these units helps engineers, fabricators, and procurement teams ensure proper compatibility with international standards. The table below provides the standard tubing dimensions in both inch and millimeter values.
| Nominal Size (Inch) | Outside Diameter (OD) mm | Wall Thickness (mm) | Inside Diameter (ID) mm |
| ¼” | 6.35 | 1.65 | 3.05 |
| ½” | 12.70 | 2.11 | 8.48 |
| ¾” | 19.05 | 2.77 | 13.51 |
| 1″ | 25.40 | 3.38 | 18.64 |
| 1 ½” | 38.10 | 3.68 | 30.74 |
| 2″ | 50.80 | 3.91 | 42.98 |
| 3″ | 76.20 | 5.49 | 65.22 |
| 4″ | 101.60 | 6.02 | 89.56 |
Monel K500 Seamless Pipe Chemical Composition
The chemical composition of Monel K500 is what gives it its unique combination of strength, hardness, and corrosion resistance. By adding controlled amounts of aluminum and titanium to the nickel–copper base alloy, Monel K500 achieves precipitation hardening, which significantly enhances its mechanical properties compared to Monel 400. The table below shows the typical chemical composition of Alloy K500 Pipes.
| Element | Content (%) |
| Nickel (Ni) | 63.0 min |
| Copper (Cu) | 27.0 – 33.0 |
| Aluminum (Al) | 2.3 – 3.15 |
| Titanium (Ti) | 0.35 – 0.85 |
| Iron (Fe) | 2.0 max |
| Carbon (C) | 0.25 max |
| Manganese (Mn) | 1.5 max |
| Silicon (Si) | 0.5 max |
| Sulfur (S) | 0.01 max |
Alloy K500 Welded Pipe Mechanical Properties
The mechanical properties of Monel K500 Welded Pipes make them suitable for demanding industrial applications where both strength and toughness are essential. Due to age-hardening, the alloy achieves significantly higher yield and tensile strength compared to Monel 400, while retaining excellent ductility and impact resistance. The table below highlights the key mechanical properties of Alloy K500.
| Property | Value |
| Tensile Strength | 110 ksi (758 MPa) min |
| Yield Strength (0.2% Offset) | 80 ksi (552 MPa) min |
| Elongation | 20% min |
| Hardness | Rockwell B 100 max |
Werkstoff Nr. 2.4375 Monel Pipe Physical Properties
The physical properties of Monel K500 (Werkstoff Nr. 2.4375) define its performance in critical industrial applications. These properties, including density, melting point, thermal conductivity, and electrical resistivity, determine how the material behaves under different operating conditions such as high pressure, elevated temperatures, or corrosive environments. The table below outlines the standard physical properties of Monel K500 Pipes.
| Property | Value |
| Density | 8.44 g/cm³ |
| Melting Range | 1315 – 1350 °C |
| Thermal Conductivity | 17 W/m·K |
| Electrical Resistivity | 620 nΩ·m |
Equivalent Grades of Monel Alloy K500 Pipe
Monel K500 is recognized under different international standards and specifications, making it easier for global buyers to source the material. The following equivalent grades highlight how the alloy is identified across various standards and regions:
| Standard | Grade |
| UNS | N05500 |
| WNR | 2.4375 |
| ASTM / ASME | B165 / SB165 (Pipe & Tube) |
| EN | NiCu30Al |
| BS | NA 18 |
| AFNOR | NU30A |
| DIN | 2.4375 |
Monel K500 Pipe Pressure Rating / Pressure Class
Pressure ratings indicate the maximum working pressure a pipe can safely handle under specified temperatures. For Monel K500, the high strength and corrosion resistance allow it to be used across a wide range of pressure classes, making it suitable for both moderate and high-pressure service in oil & gas, chemical, and marine applications. The table below outlines the standard ASME pressure classes available for Monel K500 pipes.
| Pressure Class (ASME B16.5 / B16.47) | Typical Application Range | Remarks |
| Class 150 | Low-pressure piping, utility lines, seawater lines | Suitable for general service, not for high-pressure environments. |
| Class 300 | Chemical processing, refineries, cooling water systems | Handles higher pressures than Class 150, widely used in mid-range industrial service. |
| Class 600 | Oil & gas production systems, marine pipelines, moderate sour service | Provides excellent balance of strength and corrosion resistance under higher loads. |
| Class 900 | Offshore platforms, subsea systems, high-stress conditions | Common in critical projects where reliability under pressure is vital. |
| Class 1500 | High-pressure chemical reactors, defense & aerospace projects | Ideal for extreme service with sustained pressure and harsh media. |
| Class 2500 | Specialized oilfield applications, nuclear power, deep-sea systems | Designed for the most demanding pressure conditions; requires precise engineering checks. |
Density, Hardness and Thermal Conductivity of Alloy K500 Pipes
The physical characteristics of Monel K500 play a crucial role in determining its suitability for critical applications. Properties such as density, hardness, and thermal conductivity directly influence the alloy’s strength-to-weight ratio, wear resistance, and ability to perform under fluctuating temperatures. The table below provides key values for Alloy K500 Pipes.
| Property | Value | Significance |
| Density | 8.44 g/cm³ | Indicates a relatively high mass per unit volume, contributing to strength and durability in high-pressure environments. |
| Hardness | 250 – 300 HB (Brinell, aged condition) | Provides excellent wear resistance, making it suitable for marine shafts, pump components, and oilfield equipment. |
| Thermal Conductivity | ~17 W/m·K at room temperature | Ensures efficient heat transfer, important for use in condensers, heat exchangers and chemical processing systems. |
Monel K500 Pipe Weight Chart (kg/m & lb/ft)
Weight calculations are essential for engineers and procurement teams to estimate load handling, transportation, and project costs. The weight of Monel K500 pipes depends on their nominal diameter and wall thickness. The table below provides approximate weights in both kilograms per meter (kg/m) and pounds per foot (lb/ft) for standard pipe sizes.
| Nominal Pipe Size (NPS) | Outside Diameter (OD) mm | Wall Thickness (mm) | Weight (kg/m) | Weight (lb/ft) |
| ½” | 21.3 | 2.77 | 1.27 | 0.85 |
| 1″ | 33.4 | 3.38 | 2.72 | 1.83 |
| 2″ | 60.3 | 3.91 | 5.44 | 3.65 |
| 3″ | 88.9 | 5.49 | 11.29 | 7.58 |
| 4″ | 114.3 | 6.02 | 16.07 | 10.80 |
| 6″ | 168.3 | 7.11 | 32.95 | 22.15 |
| 8″ | 219.1 | 8.18 | 52.55 | 35.30 |
| 10″ | 273.1 | 9.27 | 84.75 | 56.90 |
Advantages of Using Monel K500 Pipe
Using Monel K500 pipes offers unmatched advantages for critical applications. Their exceptional corrosion resistance and toughness deliver long-term reliability in even the harshest conditions.
Exceptional Corrosion Resistance: Monel K500 performs reliably in seawater, acidic, and alkaline environments where other alloys often fail. Its resistance to pitting, crevice corrosion, and chemical attack makes it suitable for marine and chemical industries.
High Strength and Fatigue Resistance: The alloy provides superior tensile and yield strength due to age-hardening, maintaining durability even under cyclic loading. This ensures long service life in offshore, aerospace, and heavy-duty applications.
Chloride Stress Cracking Resistance: Unlike many stainless steels, Monel K500 resists chloride-induced stress corrosion cracking. This makes it highly valuable in oil & gas wells and seawater systems exposed to aggressive chloride ions.
Wide Temperature Stability: The alloy retains its mechanical and corrosion resistance properties at both cryogenic and elevated temperatures. This allows it to perform effectively in diverse conditions, from LNG storage to high-heat reactors.
Reduced Maintenance and Long Service Life: Thanks to its robust chemical and mechanical properties, Monel K500 minimizes replacement frequency and operational downtime. This translates to lower lifecycle costs and greater reliability in critical systems.
Applications of Alloy K500 Pipes in Industries
Find below the major industrial uses of Alloy K500 pipes, highlighting how their unique combination of high strength, corrosion resistance, and durability makes them indispensable across sectors.
Oil & Gas Industry: Monel K500 pipes are used in downhole tools, wellhead components, and valves where both strength and corrosion resistance are critical. Their resistance to sour gas (H₂S environments) makes them ideal for offshore and deep-well drilling.
Marine Engineering: In seawater systems, Monel K500 pipes serve in propeller shafts, pumps, and seawater intakes. Their ability to resist pitting, cavitation, and biofouling ensures long service life in ships and offshore structures.
Chemical Processing: The alloy is used in heat exchangers, evaporators, and piping for acids and alkalis. Its stability in harsh chemical media reduces equipment downtime and ensures safe handling of aggressive fluids.
Aerospace Industry: Monel K500 is employed in springs, fasteners, and critical engine components that require high strength-to-weight performance. It retains toughness at both cryogenic and elevated temperatures, ensuring reliability in flight conditions.
Nuclear Power Sector: Pipes are used in reactor systems, fuel handling equipment, and safety-critical components. Their high resistance to radiation and corrosion provides durability in the demanding environment of nuclear plants.
Monel K500 Pipe Testing & Inspection Standards
To ensure reliability in critical industries, Monel K500 Pipes undergo strict testing and inspection procedures. These tests verify the chemical composition, mechanical properties, and structural integrity of the alloy, guaranteeing compliance with international standards. The table below highlights the key testing and inspection practices followed for Alloy K500 Pipes.
| Test / Inspection | Purpose | Details |
| Positive Material Identification (PMI) | Confirms material grade | Ensures supplied pipes match Monel K500 (UNS N05500) specifications. |
| Ultrasonic Testing (UT) | Detects internal flaws | Identifies cracks, voids, and discontinuities inside the pipe wall. |
| Radiographic Testing (RT) | Examines weld quality | Uses X-ray or gamma rays to check for defects in welded sections. |
| Eddy Current Testing | Surface defect detection | Finds cracks, pits, or corrosion on the external surface of pipes. |
| Tensile & Yield Testing | Measures mechanical strength | Confirms compliance with ASTM B865 standards for strength values. |
| Hardness Test | Verifies material hardness | Ensures correct aging/heat-treatment has been achieved. |
| Flaring & Flattening Tests | Assesses ductility | Tests the pipe’s ability to deform without cracking under stress. |
| Hydrostatic Test | Checks pressure resistance | Verifies that the pipe can withstand required working pressures. |
| Third-Party Inspection | Independent validation | Carried out by agencies like TUV, SGS, or Lloyds for global acceptance. |
Packaging, Marking, and Export Supply of Monel Alloy K500 Pipes
To ensure safe transit and maintain product integrity, Monel Alloy K500 pipes are carefully packed, clearly marked with heat numbers and specifications, and shipped following international export standards. This guarantees traceability, protection against damage, and hassle-free delivery to global destinations.
Packaging: Pipes are packed in seaworthy wooden cases, steel bundles, or pallets with proper end-cap protection. This prevents damage from moisture, corrosion, or handling during long-distance shipments. Packaging is designed to meet international export standards for safe delivery.
Marking: Each pipe is clearly marked with grade, size, schedule, heat number, and manufacturer’s logo. Proper marking ensures easy identification during inspection and inventory management. It also provides traceability for buyers and project engineers.
Export Supply: Stellar Alloys maintains a strong global export network covering the USA, Europe, Middle East, and Asia. Pipes are shipped with all required customs documentation and certificates (EN 10204 3.1/3.2, test reports). This ensures hassle-free imports and timely delivery for international projects.
Monel K500 Pipe Price List (Per Kg / Per Foot)
The cost of Monel K500 Pipes varies depending on the type (seamless, welded, ERW), dimensions, and order quantity. Pricing is also influenced by market demand and raw material fluctuations. The table below provides an indicative price range for commonly supplied Monel K500 pipes to help buyers plan procurement budgets.
| Product Type | Size Range | Approx. Price (₹/Kg) | Approx. Price (₹/Foot) |
| Monel K500 Seamless Pipe | ½” – 8″ NB | ₹2,800 – ₹4,500 | ₹850 – ₹1,350 |
| Monel K500 Welded Pipe | 1″ – 12″ NB | ₹2,200 – ₹3,800 | ₹650 – ₹1,150 |
| Monel K500 ERW Pipe | ½” – 6″ NB | ₹2,000 – ₹3,500 | ₹600 – ₹1,000 |
| Monel K500 EFW Pipe | 6″ – 24″ NB | ₹2,500 – ₹4,200 | ₹750 – ₹1,250 |
| Monel K500 Fabricated Pipe | Custom Sizes | ₹3,000 – ₹5,000 | Price on Request |
Note: Prices are indicative and subject to change based on raw material costs, order quantity, and market conditions.
Frequently Asked Questions About Monel K500 Pipe
Monel 400 is a solid-solution alloy of nickel and copper, offering good corrosion resistance. Monel K-500, however, is precipitation-hardened with aluminum and titanium, which gives it significantly higher strength and hardness while retaining corrosion resistance.
Yes, Monel K500 can become slightly magnetic, especially after age-hardening, unlike Monel 400 which is non-magnetic in most conditions.
Monel K500 is widely used in marine, oil & gas, chemical, and aerospace industries for applications requiring a combination of strength, corrosion resistance, and durability such as pump shafts, valves, fasteners, and heat exchangers.
