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quality Corrosion Resistant Super Austenitic Stainless Steel EN 10028-7 Compliant Slip on Plate Flange factory
quality Corrosion Resistant Super Austenitic Stainless Steel EN 10028-7 Compliant Slip on Plate Flange factory
quality Corrosion Resistant Super Austenitic Stainless Steel EN 10028-7 Compliant Slip on Plate Flange factory

Corrosion Resistant Super Austenitic Stainless Steel EN 10028-7 Compliant Slip on Plate Flange

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erw carbon steel pipe

precision steel pipe

spiral steel pipe
Product Summary
1.4529 super austenitic stainless steel offers exceptional corrosion resistance in aggressive environments like seawater, chlorides, and acids. With high nickel (24-26%), chromium (19-21%), and molybdenum (6-7%), it provides superior pitting resistance and strength, ideal for offshore, chemical processing, and oil & gas applications.

Product Details

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Corrosion Resistant Slip on Plate Flange

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Super Austenitic Stainless Steel EN Flange

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EN 10028-7 Compliant 1.4529 Flange
Product Description
X1NiCrMoCuN25-20-7 EN 10028-7 1.4529 EN Flange Manufacturer

1.4529 steel is a highly alloyed austenitic stainless steel, also known as a super austenitic stainless steel. It is designed for excellent corrosion resistance, especially in very aggressive environments such as seawater, chlorides, and acidic media.

Chemical Composition
Element Content (Weight %)
Carbon (C) ≤ 0.02 %
Silicon (Si) ≤ 0.7 %
Manganese (Mn) ≤ 2.0 %
Phosphorus (P) ≤ 0.03 %
Sulfur (S) ≤ 0.01 %
Chromium (Cr) 19 – 21 %
Nickel (Ni) 24 – 26 %
Molybdenum (Mo) 6 – 7 %
Copper (Cu) 0.5 – 1.5 %
Nitrogen (N) 0.15 – 0.25 %
Key Composition Features
  • High Nickel (24–26%): Ensures a fully austenitic structure, good toughness, and strong resistance to stress corrosion cracking in chloride environments.
  • High Chromium (19–21%): Provides a strong passive layer on the surface, essential for general corrosion and pitting resistance.
  • Very High Molybdenum (6–7%): Greatly improves resistance to pitting and crevice corrosion, especially in chloride-containing environments.
  • Nitrogen Addition (0.15–0.25%): Increases strength and further improves pitting resistance; helps stabilize the austenitic structure.
  • Copper (0.5–1.5%): Enhances resistance to certain acids, particularly reducing acids like sulfuric acid.
  • Very Low Carbon, Sulfur, Phosphorus: Minimizes risk of sensitization (intergranular corrosion) and improves weldability and overall corrosion performance.
Typical Applications

Because of this alloy balance, 1.4529 is used where conventional stainless steels like 304, 316L, or even 904L are not sufficient—such as:

  • Offshore and marine applications
  • Chemical processing (especially with chlorides and acids)
  • Flue gas desulfurization (FGD) systems
  • Components in the oil & gas industry exposed to sour or chloride-rich conditions

If you need exact values for design or certification, you should always confirm with the relevant standard (e.g., EN 10088) or the specific mill certificate for the batch you are using, as different manufacturers can have small variations within these ranges.

Mrs. amy

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