Incoloy alloy 28（UNS NO8028/W.Nr.1.4563）

Product Description:

Alloy 28 (UNS N08028, W. Nr. 1.4563) is a nickel-iron-chromium alloy with added molybdenum and copper. It has excellent resistance to reducing and oxidizing acids, stress corrosion cracking, and localized corrosion such as pitting and crevice corrosion. The alloy is particularly resistant to sulfuric acid and phosphoric acid. Used in chemical processing, pollution control equipment, oil and gas well piping, nuclear fuel reprocessing, acid production and pickling equipment.

Physical properties:

Density: 8.08g/cm³

Melting point: 1357-1430℃

Extreme chemical composition:

Nickel: 30-32

Chromium: 26-28

Iron: balance

Carbon: 0.02max

Manganese: 2max

Sulfur: 0.03max

Silicon: 0.7max

Molybdenum: 3-4

Copper: 0.6-1.4

The minimum value of the mechanical properties of the alloy at room temperature:

Tensile strength Rm N/mm㎡: 500

Yield strength RP0.2 N/m㎡:215

Elongation A5%: 40

characteristic:

It has good corrosion resistance in strong acid environment.

Good resistance to stress corrosion cracking in environments containing hydrogen sulfide (H2S) and chloride

Application areas:

•Production, concentration and use of phosphoric acid reactor tanks, impellers, piping systems, cyclone evaporators, surface coolers, circulation pumps, agitators, superphosphoric acid storage, heat ex-changer shells/tubes

•Production and use of sulfuric acid: heating equipment, reactor tanks, stirrers, reactor water inlet pipes…

•Oil and gas production: sour gas applications, tubing, separators…

•Multiple offshore platform equipment

•Chemical industry (acetic acid, vinyl chloride) 

Form:

Tubes, sheets, strips, plates, round bars, flat bars, forged billets, hexagonal and wire rods.