Incoloy 926/UNS N08926/W.Nr.1.4529 Bar/ Strip/ Tube Sheet

Overview

Incoloy 926 is a nickel-based alloy containing titanium and aluminum with excellent corrosion resistance and high temperature properties. The nickel content in the alloy makes it have good oxidation resistance, while the addition of titanium and aluminum helps to form a stable oxide protective layer, further improving its corrosion resistance. The Incoloy 926 also has excellent processability and weldability for the manufacture of a wide range of complex shapes.

The chemical composition of Incoloy 926 includes elements such as nickel, chromium, iron, carbon, manganese, silicon, sulfur, molybdenum, copper, nitrogen, titanium and phosphorus. Among them, nickel and chromium are the main alloying elements, which can provide good corrosion resistance and oxidation resistance. The addition of molybdenum and copper can improve the resistance to spot corrosion and crevice corrosion in halide medium. The addition of nitrogen can further improve the strength and corrosion resistance of the alloy.

Incoloy 926 has a wide range of applications, including chemical, petroleum, energy, Marine engineering and other fields. In the chemical industry, Incoloy 926 is commonly used in the manufacture of reactors, heat exchangers, pipelines and other equipment, which can withstand the erosion of various corrosive media. In the oil and energy sector, Incoloy 926 is used to manufacture high-temperature and high-pressure oil and gas extraction equipment and nuclear power plant equipment. In the field of Marine engineering, Incoloy 926's corrosion resistance and high temperature strength make it an ideal material for manufacturing offshore oil RIGS, desalination equipment, and more.

Limiting Chemical Composition, %

Nickel..................................................................................................................................................................................24.00-26.00 

Chromium...........................................................................................................................................................................20.00-21.00

Molybdenum...........................................................................................................................................................................6.00-7.00

Iron............................................................................................................................................................................................Balance.

Copper.....................................................................................................................................................................................0.50-1.50 

Manganese.............................................................................................................................................................................1.00 max.

Silicon.....................................................................................................................................................................................0.50 max.

Carbon....................................................................................................................................................................................0.02 max.

Niobium...................................................................................................................................................................................0.15-0.25

Phosphorus.............................................................................................................................................................................0.03 max.

Sulfur........................................................................................................................................................................................0.01 max.

Physical Constants

Mechanical properties

Corrosion Resistance

Incoloy 926 is a highly corrosion-resistant nickel-based alloy also known as UNS N08926 alloy. Its corrosion resistance is mainly due to its chemical composition, including a high content of nickel and chromium, and a small amount of molybdenum, titanium and other elements. The combination of these elements makes Incoloy 926 resistant to various corrosive media, including acids, bases, salts, etc.

In dilute sulfuric acid, hydrochloric acid, hydrofluoric acid, phosphoric acid and other strong acid media, Incoloy 926 corrosion resistance is comparable to 316L stainless steel, much higher than 400 series stainless steel. In nitric acid, nitric acid + hydrofluoric acid and other strong oxidizing acid media, Incoloy 926 corrosion resistance is even better than 316L stainless steel. In addition, Incoloy 926 also has good resistance to pitting and crevice corrosion, especially in chlorine-containing environments, such as seawater and salt spray, its corrosion resistance is particularly outstanding.

Heat treatment

The heat treatment of Incoloy 926 is a critical process that optimizes its mechanical properties and corrosion resistance. The following is a basic overview of the Incoloy 926 heat treatment:

1. The workpiece should always be kept clean before and during heat treatment, in order to avoid the impact of impurities on material properties. At the same time, the heat treatment process should not be in contact with sulfur, phosphorus, lead and other low-melting metals, which may damage the performance of the material.

2.The sulfur content in fuels should be as low as possible, the sulfur content in natural gas should be less than 0.1%, and the sulfur content in heavy oil should be less than 0.5%. Sulfur is a harmful element that reacts with the material during heat treatment, reducing the properties of the material.

3.It is best to perform heat treatment in a vacuum furnace or gas protected furnace, and it can also be heated in a box furnace or gas furnace, but the furnace gas must be clean, suitable for neutral to micro oxidation, and avoid fluctuations between oxidation and reduction. The heating flame cannot be burned directly onto the workpiece to avoid local overheating and deformation.

4.Incoloy 926 solution treatment temperature range is 1150℃ ~ 1200℃, the most suitable temperature is 1170℃. Solution treatment can improve the internal structure, strength and toughness of the material.

5.The material with a thickness greater than 1.5mm is cooled by water quenching, and the material with a thickness less than 1.5mm can also be cooled by rapid air. The cooling speed will affect the organizational structure and performance of the material, so it is necessary to choose the appropriate cooling method according to the thickness and performance requirements of the material.

Avaliable Forms

We provide you with a variety of product forms, including but not limited to

● Bar & Rod

● Pipe &Tube

● Coil & Strip

● Plate & Sheet/Circle

● Wire & Welding

● Fitting (Flange, Elbow, Tee...)

● Customize