Duplex & Super Duplex

 


 

Super Duplex alloys are characterised by higher Chromium content than standard duplex stainless, typically around 25% and a PREN > 40 (PREN = Cr% + 3.3Mo% + 16N%) and offer improved corrosion resistance and better mechanical properties.

 

Duplex stainless steel grades:

Alloy / Common Name ASTM Type
J93372, CD4MCuN A890 1B 25Cr-5Ni-Mo-Cu-N
J93373, CD3MCuN A890 1C 25Cr-6Ni-Mo-Cu-N


Duplex & Super Duplex Forms Available:

• Fittings & Flanges
• Pipe
• Plate
• Sheet
• Tube
• Bar


Value Added Service:

• Heat treatment
• Annealed & pickling
• Rolling, cutting, bending, forging, minor fabrication, etc.



Super Duplex Steel F53 (UNS S32750)


Technical Data Sheet

Chemical Composition Limits

Weight%

C

Mn

P

S

Si

Cr

Ni

Mo

N

Cu

Super Duplex F53

0.03 max

1.2 max

0.035 max

0.015 max

0.8 max

24-26

6-8

3-5

0.3

0.5 max


F53 is a high alloy duplex stainless steel. F53 has excellent resistance to pitting and crevice corrosion resistance compared with the ordinary austenitic or duplex types. Due to this F53 stainless steel is used primarily in highly corrosive conditions.


Typical Mechanical Properties


Alloy

Tensile Strength ksi

Proof Strength 0.2% ksi (min)

Elongation (%) (min)

Hardness Rockwell C

Super Duplex F53 Annealed Condition

110-135

80

15

28 max


Availability

Super Duplex F53 is available in Bar, for sizes contact Sales.


Specifications
• ASTM A182 F53
• ASTM A276 F53
• ASTM A479 F53
• AISI F53
• WS 1.4410
• X2CrNiMoN25.7.4
• AFNOR Z3CND25.07Az
• UNS S32750
• URANUS 47N(+)

 

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