AISI 321 / 1.4541 Stainless Steel

✅ General Technical Characteristics

Stainless steel AISI 321 (EN 1.4541, 08X18H10T) is a titanium-stabilized austenitic stainless steel that offers high corrosion resistance, particularly against intergranular corrosion. The addition of titanium enhances the alloy’s thermal stability and durability when used in high-temperature environments.

Main Characteristics:

• High resistance to intergranular corrosion.
• Improved thermal resistance compared to AISI 304.
• Good weldability without the risk of carbide precipitation.
• High mechanical strength and oxidation resistance.
• Suitable for prolonged use in temperatures ranging from 600-800°C.

🔬 Chemical Composition AISI 321 / EN 1.4541 (%):

• Carbon (C): ≤ 0.08
• Silicon (Si): ≤ 1.0
• Manganese (Mn): ≤ 2.0
• Phosphorus (P): ≤ 0.045
• Sulfur (S): ≤ 0.015
• Chromium (Cr): 17.0 – 19.0
• Nickel (Ni): 9.0 – 12.0
• Titanium (Ti): ≥ 5 x C

💡 The addition of titanium prevents chromium carbide formation, making the steel more resistant to corrosion after welding.

🏭 Applications

Steel AISI 321 (EN 1.4541, 08X18H10T) is widely used in industries requiring high thermal stability and oxidation resistance.

Main Application Areas:

• Aerospace and aviation industry.
• Production of exhaust systems and heat exchangers.
• Chemical and petrochemical industry (storage tanks, pipelines, reactors).
• Energy sector (boiler equipment, steam pipes, heat exchangers).
• Mechanical engineering and metal structures.

📊 Mechanical Properties

• Tensile Strength (Rm): 500 – 750 MPa
• Yield Strength (Rp0.2): ≥ 200 MPa
• Hardness (HB): ≤ 220 HB
• Elongation (A5): ≥ 40 %

⭐ Features

• High oxidation resistance – performs exceptionally well in high-temperature environments.
• Heat resistance – maintains mechanical properties at temperatures up to 800°C.
• Excellent weldability – titanium stabilization prevents carbide precipitation.
• Strength and durability – withstands intense mechanical loads.
• Wide range of applications – suitable for industrial equipment, transportation, and construction structures.

AISI 321 / EN 1.4541 steel delivery forms