Inconel 625 vs 2205 Duplex Stainless Steel: High - Performance Contrasts

 

What differentiates their chemical makeup?​

Inconel 625 has over 58% nickel, 20 - 23% chromium, 8 - 10% molybdenum, and niobium. 2205 duplex has 22% chromium, 5 - 6% nickel, 3% molybdenum, and nitrogen, with a unique dual - phase structure.​

 

How do they perform at high temperatures?​

Inconel 625 retains strength up to 1800°F (982°C), ideal for extreme heat. 2205 can handle high temperatures but not as well as Inconel 625, with a limit around 600°F in some applications.​

 

Which offers superior corrosion resistance?​

Inconel 625 resists corrosion in harsh, acidic, and alkaline conditions. 2205 is excellent in chloride - rich and corrosive industrial settings, but Inconel 625 has a slight edge in extreme environments.​

 

What are the cost and availability factors?​

Inconel 625 is expensive due to high - value alloy elements. 2205 is more cost - effective, though still pricier than standard stainless steels, and is more widely available.​

 

Where are they typically applied?​

Inconel 625 is used in aerospace engine parts, deep - sea oil pipelines, and chemical reactors. 2205 finds use in oil and gas pipelines, offshore platforms, and chemical processing equipment.