Monel K500 Seamless and Welded Pipe
Steel Pipe & Tubes has been a leading supplier of Monel piping solutions.
Monel K500 Pipe is an improved nickel copper alloy pipe that is used in challenging operating conditions that require high strength, resistance to corrosion, and service longevity. Alloy K500 pipes are manufactured using a precipitation-hardened grade providing high mechanical strength and high levels of resistance to stress corrosion cracking, seawater and erosion environments. This causes them to be of preference in offshore platforms, marine systems, oil and gas processing, chemical plant, power generation units, pump shafts and high temperature equipment.
Stellar Alloys provide Monel K500 seamless, welded and fabricated pipes that are produced under the ASTM B163 and ASTM B165 criteria. Every pipe is checked in terms of its dimensions, hydro-testing, hardness testing and heat-treatment verification to assure uniform performance in most of the critical applications. Our Alloy K500 range can be used to meet the manufacturing needs of standard and project specifications with fine OD-WT control, tailored cut-length, and SCH 10, SCH 40 and SCH 80 options.
To ensure that the applications in need of moderate strength with a comparable corrosion strength the Monel 400 Pipe can also be used as an alternative material offering a client a chance to select the appropriate alloy based on temperature, pressure and fluid compatibility.
High-Quality Monel K500 Pipe Manufacturer in India – Trusted Alloy UNS N05500 Tubing Supplier and ASME SB165 Monel Welded Pipe ASME B36.19
We have been known as a manufacturer and world exporter of Monel K500 Pipe, UNS N05500 Tubing and ASME SB165 Monel Welded Pipe in India. Stellar Alloys is a manufacturing company with decades of engineering experience and with a firm belief in quality, industries that have critical operations depending on high-performance nickel copper alloys have turned to the company. Monel Tubes, Monel Square Tubes, Monel Rectangular and Monel Hexagonal Pipes are also part of our product range to serve a very diverse range of engineering and fluid-handling needs. We are also providing Monel 400 Pipe which can be used in areas where high corrosion resistance in sea and chemical conditions is required.
Our production plants have advanced rolling mills, automatic welding machine, heat treatment furnaces and metallurgical tests, which meet the requirements of ASTM B163, ASTM B165, ASTM B865 and ASME SB165. Each Monel K500 Seamless Pipe, Welded Pipe, ASME B36.19 Tubing and all specialty products including Monel Square Tubes and Monel Rectangular Pipes are inspected at each phase, raw material selection is made, dimensional stability is maintained as well as mechanical strength and chemical accuracy.
The reason why Stellar Alloys is preferred by the EPC contractors, offshore operators, chemical processing units, marine fabricators and aerospace component manufacturers is that we provide seamless, welded, ERW, EFW and fabricated Alloy K500 Pipes which they can trace the material completely. All products such as Monel Hexagonal Pipes and Monel Tubes are also supplied with EN 10204 3.1 / 3.2 MTCs, third-party inspection report (Lloyds, TUV, SGS) and optional NACE MR0175 / ISO 15156 sour-service environment compliance.
We have a strong stock line of Monel K500 Pipes and Tubes in Square, Rectangular and Hexagonal shapes together with a strong distribution network all over Asia, Europe, the Middle East and the Americas that provide fast delivery, correct marking and safe export grade packaging. Stellar Alloys is confident in its ability to deliver its products at the relative cost of reduced performance and long term value to your critical project, whether in bulk project supplies or in custom dimensions necessary to meet the performance standards of ASME B36.19.
Types of Monel K500 Pipe (Seamless, Welded, ERW, EFW, Fabricated)
Seamless Pipes
Welded Pipes
UNS N05500 Welded Pipe
Welded Tubes
ERW Pipes
ERW Tubes
Round Pipes & Tubes
Square Pipes & Tubes
Rectangular Pipes & Tubes
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 |
Monel K500 Pipe Wall Thickness Chart
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 |
Chemical Composition of Alloy K500 Seamless Pipes
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 |
Mechanical Properties of Monel K500 Welded Pipes
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 |
Physical Properties of Werkstoff Nr. 2.4375 Monel K500 Pipes
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 |
International Equivalent Grades of Monel K500 Pipes
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 Ratings and ASME Pressure Classes
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 in kg/m and 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 |
Testing and Inspection Standards for Monel Alloy K500 Pipes
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 and 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.
Advantages of Using Monel K500 Pipe
Monel K500 Pipe has a higher mechanical strength and corrosion resistance, and this gives it one of the most reliable materials to be used in industrial applications that are challenging. Its nickel copper alloy chemistry and age hardened strengthening makes it suitable to serve in the long term in harsh, corrosive and high pressure conditions.
- Exceptional Corrosion Resistance
Monel K500 offers spectacular seawater and acid resistance and alkaline environments and is better than the majority of standard nickel alloys and stainless steels. Its high pitting, crevice corrosion resistance and chemical attack gives Monel K500 Pipe an advantage over other materials in marine engineering, desalination facilities, off shore system and chemical processing plants. - High Fatigue Resistance and Strength
When Monel K500 Pipe is hardened by age, it is found to have much greater tensile and yield strength than Monel 400. This increase in strength provides great fatigue resistance in cyclic loading, and the alloy is appropriate to the heavy duty equipment, high pressure pumps, aerospace components and offshore production systems requiring high levels of durability and reliability. - Stress cracking Resistance to Chloride Stress
Compared to other stainless steels, Monel K500 is extremely immune to chloride induced stress corrosion cracking. This is particularly useful to oil and gas wells, seawater injection systems, underwater assemblies and industrial piping which has to be exposed to the chloride rich environments. - Constant Operation over Temperature Wide ranges
The monel K500 Pipe does not lose its mechanical strength and resistance against corrosion to cryogenic temperatures up to high temperatures. This broad temperature range enables good operation in LNG storage, compressor units, high heat reactor and thermal cycling conditions found in power generation and petrochemical service. - Less Maintenance and Increased Life
The chemical strength and mechanical strength of Monel K500 Pipe has made it to have less maintenance requirements and a lower rate of replacement. This is because it has a long service life that translates to low operating costs and high system reliability, thus it is suitable in critical applications where failure is not a matter of concern.
Applications of Alloy K500 Pipes in Industries
Alloy K500 Pipe finds extensive application in industries which require high level of strength, resistance to corrosion and long service life under demanding operating environment. Monel K500 Pipe is an age hardened nickel copper composition and as such, it is applicable in critical systems where reliability and extra durability are paramount.
Major Industrial Applications of Monel K500 Pipe
- Oil and Gas Industry:
Mostly used in downhill equipment, wellhead assembly, valves of flow control and sour gas service because of high hydrogen sulfide and high pressure resistance. - Marine Engineering:
It is used in components such as propeller shafts, seawater pumps, intake systems, and other underwater parts as it is not easily damaged, wear, and marine organisms do not grow, thus it has a longer lifespan. - Chemical Processing Plants:
They are ideal in heat exchangers, evaporators, reactors and process piping that require the use of acidic and alkaline fluids and stable operation in corrosive fluids. - Aerospace Components:
Applied in springs, fastening heads and engine components which require to be robust, yet light in weight and endure extreme cold and extreme heat. - Nuclear Power Facilities:
Applicable to reactor support systems, fuel handling units, as well as radiation-exposed components due to its resistance to corrosion and thermal durability.
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Frequently Asked Questions About Monel K500 Pipe
Monel K500 is an age hardened nickel copper alloy. It is high tensile strength, good corrosive resistance and good toughness within a wide range of temperatures. It is normally applied in offshore, marine, chemical and high pressure systems.
The seamless pipe is produced without a weld line that provides a pipe with increased pressure resistance and dimensions strength. Welded pipe is manufactured by welding strips and is appropriate in bigger diameters and typical industrial use. Monel K500 is offered in both forms.
Popular substitutes of Monel K500 are UNS N05500 and WNR 2.4375. These titles signify the identical alloy of comparable chemical make-up and mechanical characteristics as pipes, tubes and high strength parts.
Monel K500 pipe is used in oil and gas wells, seawater, marine pumps, propeller shafts, chemical processing plants, defence equipment and high temperature applications that require strength and corrosion resistance.
Yes, the Monel K500 is much stronger than the Monel 400. Monel K500 is age hardened to enhance tensile and yield strength, which makes Monel K500 suitable in high pressure, fatigue prone environments, and high load type environments that Monel 400 is not able to resist.
Yes, Monel K500 results in a good resistance against chloride induced stress corrosion cracking. It works well in sea water, offshore and chloride laden conditions when stainless steel fails.
Monel K500 has mechanical strength at low temperatures and can be used at high temperatures. This enables it to be used in LNG systems, thermal reactors, power plants and aerospace parts.