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Super Duplex Stainless Steel

 

We hold stock of Super Duplex stainless steel plate specifications UNS S32750 (1.4410) and UNS S32760 (1.4501). In order to get more specific information on these steel grades click the following links:

  • ● Super Duplex S32750
  • ● Super Duplex S32760

A Super Duplex stainless steel is a type of Duplex stainless steel with enhanced corrosion resistance which is categorised by its PREN being greater than 40. A standard Duplex like the S31803 grade stocked by us has a PREN of around 35. The Pitting Resistance Equivalent Number (PREN) is widely used as a means of comparing the relative corrosion resistance of different steel grades. The PREN is obtained by applying a mathematical formula to the chemical composition of a steel so that PREN = %Cr (3.3 x %Mo) (16 x %N).

As a part of the Duplex family of stainless steels Super Duplex stainless has a microstructure which is split roughly 50:50 between austenite and ferrite. It differs from Duplex in its chemical composition (with increased amounts of Molybdenum, Nickel, and Chromium) and its mechanical properties (higher proof stress and tensile strength). This highly alloyed product is especially designed for marine, chemical, and oil engineering applications requiring both high mechanical strength and resistance to corrosion in extremely aggressive environments (chloride-containing acids etc.).

Super Duplex stainless steel, relative to other stainless steel products, gives

  • High corrosion resistance
  • High resistance to stress corrosion cracking
  • High yield strength and tensile strength

It is used extensively for offshore oil and gas applications and can be found in flow lines, risers, process vessels, separators, coolers, manifolds, and process piping. Onshore it can be found in heat exchangers, boilers, and pressure vessels in petrochemical and chemical processing plant.

S32760 (1.4501) Super Duplex Steel Sheet

Super Duplex UNS S32760 1.4501

We stocks super duplex stainless steel plates which are certified to material grades UNS S32760 and 1.4501. The steels are also compatible with the branded Zeron 100 designation. E562 microstructure analysis, and corrosion testing to G48 or A293 Method C. In order to further ensure good corrosion resistance. All material is produced and certified in accordance with NORSOK MDS D55 with plates up to and including 35 mm thick certified to Revision 4. Mill test certificates are produced with third party inspection to EN 10204 UNS S32760 Properties Chemical Analysis (% max or range)

C Mn P Si Cr Ni Mo N
0.03 1.00 0.03 0.01 1.00 24.0-26.0 6.0-8.0 3.0-4.0 0.20-0.30

 

S32760 Super Duplex steel

Thickness (mm)
Plate Sizes (mm)
5
12000 x 2000
6
12000 x 2000
12000 x 2500
8
12000 x 2000
12000 x 2500
12000 x 3000
10
12000 x 2000
12000 x 2500
12000 x 3000
12
12000 x 2000
12000 x 2500
12000 x 3000
15
12000 x 2000
12000 x 2500
12000 x 3000
20
12000 x 2000
12000 x 3000
25
8000 x 2000
6000 x 3000
30
6000 x 2000
6000 x 3000
35
4000 x 2000
6000 x 3000
40
4000 x 2000
6000 x 3000
45
4000 x 2000
6000 x 3000
50
4000 x 2000
6000 x 3000

 

 

Super Duplex UNS S3275

We stocks super duplex stainless steel plates which are certified to material grades UNS S32750 and 1.4410. The steels are also compatible with the branded 2507 designation.All us stock is manufactured by Indian steel makers and fully certified in accordance with the relevant material specification. In addition the material is enhanced with further tests such as E562 micro structure analysis, and corrosion testing to G48 or A293 Method C.

UNS S32750 Properties Chemical Analysis (% max or range)

C Mn P Si Cr Ni Mo N
0.03 1.20 0.035 0.02 0.80 24.0-26.0 6.0-8.0 3.0-5.0 0.24-0.32

 

S32750 Super Duplex steel plate

Thickness (mm)
Plate Sizes (mm)
5
12000 x 2000
6
12000 x 2000
12000 x 2500
8
12000 x 2000
12000 x 2500
12000 x 3000
10
12000 x 2000
12000 x 2500
12000 x 3000
12
12000 x 2000
12000 x 2500
12000 x 3000
15
12000 x 2000
12000 x 2500
12000 x 3000
20
12000 x 2000
12000 x 3000
25
8000 x 2000
6000 x 3000
30
6000 x 2000
6000 x 3000
35
4000 x 2000
6000 x 3000
40
4000 x 2000
6000 x 3000
45
4000 x 2000
6000 x 3000
50
4000 x 2000
6000 x 3000