Incoloy 28

 

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Details

 

Lork Group high-quality Incoloy 28 (UNS N08028, W. Nr. 1.4563) is a nickel-iron-chromium alloy with additions of molybdenum and copper. It has excellent resistance to both reducing and oxidizing acids, to stress-corrosion cracking, and to localised attack such as pitting and crevice corrosion.

 

Products Description

 

Lork Group high-quality Incoloy 28 (UNS N08028, W. Nr. 1.4563) is a nickel-iron-chromium alloy with additions of molybdenum and copper. It has excellent resistance to both reducing and oxidizing acids, to stress-corrosion cracking, and to localised attack such as pitting and crevice corrosion.

 

The alloy is especially resistant to sulphuric and phosphoric acid. Used for chemical processing, pollution control equipment, oil and gas well piping, nuclear fuel reprocessing, acid production, and pickling equipment.

 

Product Form

 

Seamless Pipe: ASTM B668, ASTM B829

Plate/Strip/Sheet: ASTM B709

Round Bar/Forgings: --

 

Chemical Composition

 

Element

Content (%)

Iron, Fe

29-40.4

Nickel, Ni

30-34

Chromium, Cr

26-28

Molybdenum, Mo

3-4

Manganese, Mn

≤2.5

Others

Remainder

 

Physical Properties

 

Properties

Metric

Imperial

Density

8 gm/cm3

0.289 lb/in3

 

Mechanical Properties

 

Properties

Metric

Imperial

Tensile strength(annealed)

500 MPa

72.5 ksi

Yield strength(annealed)

214 MPa

31 ksi

Elongation at Break(Cold worked)

15%

50%

Modulus of Elasticity

200 GPa

29000 ksi

Hardness, Rockwell B

80-90

80-90

Hardness, Rockwell C

33

33

 

Applications

 

Chemical Processing Equipment: Widely used in the manufacturing of chemical processing equipment, including tanks, reactors, heat exchangers, and piping systems. Its resistance to a wide range of corrosive chemicals, such as sulfuric acid, phosphoric acid, and organic acids, makes it an ideal choice for handling corrosive substances.

 

Flue Gas Desulfurization (FGD) Systems: Commonly employed in FGD systems, which are designed to remove sulfur dioxide (SO2) emissions from flue gases produced by power plants and industrial processes. Its resistance to corrosive environments containing sulfur compounds, including sulfuric acid, makes it suitable for components such as absorber towers and scrubbers.

 

Offshore Oil and Gas Platforms: In the oil and gas industry, Alloy 28 finds applications in offshore platforms and facilities. It is used for various components exposed to aggressive seawater environments, such as piping systems, heat exchangers, and valves. Its resistance to chloride-induced stress corrosion cracking (SCC) makes it particularly valuable in marine environments.

 

Pulp and Paper Industry: Alloy 28 is employed in the pulp and paper industry, where it is used in corrosive processes such as pulp bleaching and chemical recovery. It is suitable for equipment such as digesters, bleach towers, and evaporators, where corrosion resistance and reliability are crucial.

 

Pharmaceutical and Biotechnology Equipment: Due to its excellent corrosion resistance and hygienic properties, Alloy 28 is utilized in pharmaceutical and biotechnology equipment. It is commonly used in the manufacturing of vessels, tanks, and process piping for the production of pharmaceuticals, vaccines, and other biotechnological products.

 

Heat Exchangers and Condensers: Alloy 28 is utilized in heat exchangers and condensers in various industries, including chemical processing, power generation, and desalination. Its resistance to corrosive environments and high-temperature stability make it suitable for efficient heat transfer in demanding applications.

 

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