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Product Overview
Introduction To Incoloy 925 / Alloy 925 / UNS N09925
MOKSH TUBES & FITTINGS LLP is a trusted global manufacturer, supplier, exporter, importer, and stockist of high-quality INCOLOY® 925 (UNS N09925) products. We offer a complete portfolio including Pipes & Tubes, Pipe Fittings, Flanges, Fasteners, Sheets & Plates, Coils, Wires, Round Bars, Flat Bars, Welding Rods, Wire Mesh, and other Custom-Fabricated Components crafted from this versatile alloy.
INCOLOY 925 is a precipitation-hardenable nickel-iron-chromium alloy engineered for superior strength and resistance in extreme environments. Enriched with molybdenum, copper, titanium, and aluminum, it delivers excellent protection against stress corrosion cracking, pitting, and crevice corrosion—especially in harsh sour gas (H2S) conditions. This alloy combines toughness with excellent mechanical properties, making it ideal for use in offshore oil platforms, deep wells, chemical processing systems, and marine applications.
Chemical Composition
| Element | Composition (%) |
|---|---|
| Nickel | 42.0 – 46.0 |
| Chromium | 19.5 – 23.5 |
| Iron | Balance |
| Molybdenum | 2.5 – 3.5 |
| Copper | 1.5 – 3.0 |
| Titanium | 1.9 – 2.4 |
| Aluminum | 0.1 – 0.5 |
| Manganese | 1.0 max |
| Silicon | 0.05 max |
| Carbon | 0.3 max |
| Sulfur | 0.01 max |
Technical Composition
Physical Properties
| Property | Imperial | Metric |
|---|---|---|
| Density | 0.292 lb/in³ | 8.08 g/cm³ |
| Melting Range | 2392–2490 °F | 1311–1366 °C |
| Electrical Resistivity | 701 ohm·cir mil/ft | 1.17 µΩ·m |
| Magnetic Permeability at 200 oersteds (15.9 kA/m) | 1.001 | — |
Mechanical Properties
| Property | Cold Worked (5/8" / 15.9 mm) | Cold Worked (3.0" / 76.2 mm) | Hot Worked (1.0" / 25.4 mm) | Hot Worked (10" / 254 mm) | Round / Solution-Annealed | Round / Sol. Annealed + Aged | Cold Drawn Tubing / Sol. Annealed + Aged |
|---|---|---|---|---|---|---|---|
| Tensile Strength (ksi / MPa) | 140 / 965 | 140 / 965 | 140 / 965 | 140 / 965 | 99.3 / 685 | 167.3 / 1154 | 172.5 / 1189 |
| Yield Strength (0.2%) (ksi / MPa) | 105 / 724 | 105 / 724 | 110 / 758 | 110 / 758 | 39.3 / 271 | 120.6 / 832 | 120.4 / 830 |
| Elongation (%) | 18 | 18 | 18 | 18 | 56 | 27 | 27 |
| Reduction of Area (%) | 25 | 25 | 25 | 25 | 76 | 32 | 35 |
| Impact Strength (ft·lbf / kgf·m) | 35 / 4.85 | 35 / 4.85 | 35 / 4.85 | 35 / 4.85 | — | — | — |
| Hardness (Rockwell) | 26–38 | 26–38 | 26–38 | 26–38 | B | C | C |
Products in Incoloy 925
INCOLOY 925 , is designated as UNS N09925. Designations and specifications for the product include NACE MR-01-75, ASME Boiler and Pressure Vessel Code Case 2218 Section VIII Division 1, and Special Metals Corporation internal specification HA 46. Alloy 925 is available as tube, round bar, flat bar and forging stock.
This alloy meets several recognized industry standards, including:
Uses and Advantages
Superior resistance to chloride-induced stress corrosion cracking
Excellent pitting and crevice corrosion resistance in sour environments
High strength and durability under extreme pressure and temperature
Good weldability and formability for complex fabrications
Long service life with reduced maintenance in aggressive service conditions
Applications of INCOLOY 925
INCOLOY 925 is widely utilized in severe service environments where corrosion, pressure, and temperature are constant challenges. Key applications include:
Chemical Processing Industry
Used in heat exchangers, evaporators, tanks, and piping systems handling acidic and chloride-rich fluids.
Oil & Gas Industry
Downhole tubing, wellhead components, hangers, valves, and other sour gas service equipment
Marine Engineering
Seawater handling, pump shafts, fasteners, and heat exchanger tubing
Chemical Processing
Components exposed to strong acids and chloride-rich environments
Power Generation
Turbine components and piping exposed to aggressive cooling water and condensate
Aerospace & Defense
Applications requiring high strength, corrosion resistance, and dimensional stability
Desalination Plants
Tubes and components in saltwater processing and filtration systems
INCOLOY 925’s versatility, strength, and exceptional corrosion resistance make it an ideal choice for mission-critical operations.
WHY CHOOSE US?
FAQ's
What is Incoloy 925 and why is it used in critical industries?
Incoloy 925 (UNS N09925) is a precipitation-hardenable nickel iron chromium alloy enhanced with molybdenum, copper, titanium, and aluminum. It is designed to deliver exceptional resistance to stress corrosion cracking, pitting, and crevice corrosion, particularly in sour gas (H2S) environments. With a balance of high strength and corrosion resistance, Incoloy 925 is a preferred material for demanding industries such as oil and gas, chemical processing, power generation, and marine engineering.
What are the main properties of Incoloy 925?
Incoloy 925 offers a unique combination of mechanical strength and corrosion resistance, performing reliably under extreme pressures and high temperatures. It provides outstanding resistance to chloride-induced stress corrosion cracking and maintains durability in aggressive sour gas and seawater environments. Along with its superior toughness, the alloy offers good weldability, formability, and long service life, making it ideal for harsh industrial applications.
What are the common applications of Incoloy 925?
Incoloy 925 is widely used in industries that demand both strength and corrosion resistance. In the oil and gas sector, it is utilized for downhole tubing, hangers, valves, and other sour service equipment. In chemical processing, it is found in heat exchangers, tanks, and piping systems exposed to acidic and chloride rich fluids. It is also deployed in marine engineering for seawater handling equipment, in desalination plants for saltwater filtration systems, and in power generation for turbine and piping components.
What product forms are available in Incoloy 925?
MOKSH TUBES & FITTINGS LLP manufactures and supplies Incoloy 925 in a comprehensive range of forms, including seamless and welded pipes, tubes, sheets, plates, coils, bars, welding rods, wire mesh, flanges, fasteners, pipe fittings, and custom-fabricated components. All products are crafted to meet international standards such as NACE MR-01-75 and ASME specifications, ensuring quality and reliability in mission critical operations.
Why choose MOKSH TUBES & FITTINGS LLP for Incoloy 925 products?
MOKSH TUBES & FITTINGS LLP is a trusted global supplier of Incoloy 925 materials, with expertise in manufacturing precision engineered products for industries such as oil and gas, chemical processing, and marine applications. By sourcing premium grade raw materials, offering fast turnaround times, and providing custom fabrication support, the company ensures superior product performance and customer satisfaction. Their strong quality assurance and global track record make them a reliable partner for Incoloy 925 solutions.
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