347L vs 316Ti Stainless Steel: Stabilized for Extreme Conditions

 

What sets their compositions apart?​

347L contains 17-19% chromium, 9-13% nickel, 0.75-1.5% niobium, and carbon ≤0.03%. 316Ti has 16-18% chromium, 10-14% nickel, 2-3% molybdenum, 0.10-0.20% titanium, and low carbon.​

 

Which offers better corrosion resistance?​

316Ti outperforms 347L in chloride-rich environments like seawater, thanks to molybdenum. 347L resists high-temperature oxidation better, making it suitable for furnace parts and high-heat chemical processing.​

 

How do their mechanical properties compare?​

Both have tensile strength around 515-550 MPa, with 347L offering slightly better high-temperature strength. 316Ti has better creep resistance in moderate heat, while 347L handles higher temps more stably.​

 

What are the key application differences?​

347L is used in welded high-temperature equipment like nuclear reactor piping and furnace parts. 316Ti suits marine environments, desalination plants, and chemical tanks with chlorides.​

 

Where are they commonly used?​

347L finds applications in power plant boilers and high-temperature fasteners. 316Ti is in offshore oil rigs, seawater cooling systems, and pharmaceutical processing equipment.​