Product Specification

Duplex S31803 Elbow Pipe Fittings / Super Duplex S32205 90 degree elbow

roduct Name:   Duplex S31803 Elbow Pipe Fittings / Super Duplex S32750 

Size Range:  
DN15-DN600  (1/2"-24")       Seamless Type 
DN15 - DN1200 (1/2"- 48" )  Welded type 
Wall Thickness: SCH5 to SCH160 
Material: 
Carbon Steel: ASTM A234 WPB, WPC, ASTM A420 WPL1, WPL3, WPL6 etc
Stainless Steel: ASTM A403 WP304/304L, WP316/316/L, WP317L, WP321, WP347 & WPS31254 
Alloy Steel: ASTM A234 WP1/WP12/WP11/WP22/WP5/WP7/WP9/WP91 
Duplex and super duplex steel: ASTM A815 UNS S31803/S32205/S32750/S32760/S32550
Manufacture Standard:
ASME B16.9,ASME B16.11,ASME B16.28 ,MSS SP-43,JISB2311,JIS B2312,JIS B2313,DIN 2605,DIN 2606 ,DIN2615,DIN2616 ,BG12459-90,GB/T13401,HGJ514 ,SH3408  ,SH3409, HG/T21635, HG/T21631,
End Bevel: According to the standard or the customer's requirements 

Surface Treatment: Shot blasted, annealed & pickling,rust-proof black oil 
Non-destructive testing: penetration test, ultrasonic test, radiographic test, any third parties inspection,

Super Duplex 2507 
1. MOQ: 50KGS 
2. Type: Pipe Tube Bar Rod Sheet Plate Forging Fitting 
3. Short Delivery 
4. High Quality

SUPER DUPLEX 2507

UNS S32750

Forms of Super Duplex 2507 Available at Mega Mex

• 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, 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 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