Alloy28 Stainless steel with 28% Cr and 3% Mo

🔧 UNS N08028 Stainless Steel – Overview and Applications

UNS N08028, also known as Alloy 28, is a highly corrosion-resistant austenitic stainless steel designed for demanding environments. With a unique combination of high chromium, nickel, and molybdenum content, Alloy 28 offers excellent resistance to acidic media, chloride-induced pitting, and stress corrosion cracking.

This alloy is widely used in the chemical processing, oil and gas, desalination, and pollution control industries where aggressive corrosive conditions are present.

🧪 Chemical Composition (%):

• Nickel (Ni): 30–34

• Chromium (Cr): 26–28

• Iron (Fe): Balance

• Molybdenum (Mo): 3.0–4.0

• Copper (Cu): 0.6–1.4

• Manganese (Mn): ≤2.0

• Silicon (Si): ≤0.7

⚙️ Key Features:

• Excellent resistance to sulfuric, phosphoric, and nitric acids

• High resistance to chloride pitting and crevice corrosion

• Good mechanical strength and fabricability

• Suitable for welded pressure vessels, tubing, and chemical equipment

🛠️ Typical Applications:

• Heat exchangers and condensers

• Chemical storage tanks and piping

• Seawater applications

• Oilfield tubing and downhole equipment

• Flue gas scrubbers

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