SUPER DUPLEX 2507

UNS S32750

Forms of Super Duplex 2507 Available at Haohua Industry

Sheet 
Plate 
Bar 
Pipe & Tube (welded & seamless) 
Fittings (i.e. flanges, slip-ons, blinds, weld-necks, lapjoints, long welding necks, socket welds, elbows, tees, stub-ends, returns, caps, crosses, reducers, and pipe nipples) 
 

Duplex 2507 Overview

Duplex 2507 is a super duplex stainless steel designed for applications which demand exceptional strength and corrosion resistance. Alloy 2507 has 25% chromium,4% molybdenum, 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 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 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 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, %

In what applications is Duplex 2507 used?

Desalination Equipment 
Chemical process pressure vessels, piping and heat exchangers 
Marine Applications 
Flue Gas Scrubbing Equipment 
Pulp & Paper Mill Equipment 
Offshore Oil production/technology 
Oil and gas industry equipment 

ASTM Specifications

Mechanical Properties

Specified Tensile Properties, Plate ASTM A240

• Preview：Super Duplex Zeron 100
• Next：Super Duplex 2205