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Duplex Steel 2507 Sheet

The steel has excellent resistance to chloride stress corrosion cracking, high thermal conductivity, and a low coefficient of thermal expansion.

Duplex 2507 sheet is a super duplex stainless steel designed for applications which demand exceptional strength and corrosion resistance. Alloy 2507 sheet has 25% chromium, 4% molybdenum, and 7% nickel. This high molybdenum, chromium and nitrogen content results in excellent resistance to chloride pitting and crevice corrosion attack and the duplex structure provides 2507 with exceptional resistance to chloride stress corrosion cracking.

Usage of Duplex 2507 sheet should be limited to applications below 600° F (316° C). Extended elevated temperature exposure can reduce both the toughness and corrosion resistance of alloy 2507. Duplex 2507 sheet possesses excellent mechanical properties. Often a light gauge of 2507 material can be used to achieve the same design strength of a thicker nickel alloy. The resulting savings in weight can dramatically reduce the overall cost of fabrication.

Corrosion Resistance

2507 Duplex sheet is highly resistant to uniform corrosion by organic acSuper Duplex 2507 Plateids such as formic and acetic acid. It is alsohighly resistant to inorganic acids, especially if they contain chlorides. Alloy 2507 sheet 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.


  • High resistance to chloride stress corrosion cracking
  • Superior resistance to chloride pitting and crevice corrosion
  • Suggested for applications up to 600° F
  • Combination of properties given by austenitic and ferritic structure
  • Good weldability and workability
  • Good general corrosion resistance


  • Desalination Equipment
  • Chemical process pressure vessels, piping and heat exchangers
  • Marine Applications
  • Flue Gas Scrubbing Equipment
  • Offshore Oil production/technology

Chemical Composition

Element Content (%)
Chromium, Cr 24 – 26
Nickel, Ni 6 – 8
Molybdenum, Mo 3 – 5
Manganese, Mn 1.20 max
Silicon, Si 0.80 max
Copper, Cu 0.50 max
Nitrogen, N 0.24 – 0.32
Phosphorous, P 0.035 max
Carbon, C 0.030 max
Sulfur, S 0.020 max
Iron, Fe Balance

Physical Properties

Properties Metric Imperial
Density 7.8 g/cm3 0.281 lb/in3
Melting point 1350°C 2460°F

Calico Metal Ind Pvt Ltd exports their products to countries like UAE, Bahrain, Italy, Indonesia, Malaysia, United States, Mexico, Chine, Brazil, Peru, Nigeria, Kuwait, Jordan, Dubai, Thailand (Bangkok), Venezuela, Iran, Germany, UK, Canada, Russia, Turkey, Australia, New Zealand, Sri Lanka, Vietnam, South Africa, Kazakhstan & Saudi Arabia.