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, %
Cr | Ni | Mo | C | N | Mn |
24.0-26.0 | 6.0-8.0 | 3.0-5.0 | 0.030 Max | .24-.32 | 1.20 Max |
Si | Cu | P | S | Fe | |
0.80 Max | 0.50 Max | 0.035 Max | 0.020 Max | Balance |
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
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
In what Applications are Duplex Stainless Steels® used?
