Duplex 2507 SS Pipe Schedule

Corrosion Resistance

Duplex 2507 SS Pipe Schedule is highly resistant to uniform corrosion by organic acids such as formic and acetic acid. It is alsohighly resistant to inorganic acids, especially if they contain chlorides.  Alloy 2507 is highly resistant to carbide-related intergranular corrosion.  Due to the ferritic portion of the duplex structure of the alloy it is very resistant to stress corrosion cracking in warm chloride containing environments. Through additions of chromium, molybdenum and nitrogen localized corrosion such as pitting and crevice attack are improved.  Alloy 2507 has excellent localized pitting resistance.

What are the characteristics of Duplex 2507?

· High resistance to chloride stress corrosion cracking

· High Strength

· Superior resistance to chloride pitting and crevice corrosion

· Good general corrosion resistance

· Suggested for applications up to 600° F

· Low rate of thermal expansion

· Combination of properties given by austenitic and ferritic structure

· Good weldability and workability

Chemical Composition, %

What are the Characteristics of Duplex Stainless Steels®?

• Very good resistance to uniform corrosion

• Very good resistance to pitting and crevice corrosion

• High resistance to stress corrosion cracking and corrosion fatigue

• High mechanical strength

• Good sulfide stress corrosion resistance

• Good abrasion and erosion resistance

• Good fatigue resistance high energy absorption

• Low thermal expansion

• Good weldability




In what Applications are Duplex Stainless Steels® used?

• Oil and gas equipment

• Offshore technology

• Seawater desalination plants

• Chemical industry, especially when handling chlorides

• Flue-gas cleaning

• Desalination plants and seawater systems

• Pulp and paper industry

• Cargo tanks and pipe systems in chemical tankers

• Firewalls and blast walls on offshore platforms

• Bridges

• Storage tanks

• Pressure vessels, reactor tanks, and heat exchangers

• Rotors, impellers and shafts