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Ambient temperature mechanical properties of austenitic-ferritic (duplex) stainless steel flat products to BS EN 10088-2

Introduction

BS EN 10088-2 is the material standard for stainless steel sheet, plate and strip for general purposes. This article gives the 0.2% and 1.0% proof strength, tensile strength and elongation of the 12 austenitic-ferritic, (duplex), grades specified. The standard also specifies includes impact properties, and resistance to intergranular corrosion acceptance criteria. For reasons of space, these are omitted from the tables shown here.

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The data given is not intended to replace that shown in individual standards to which reference should always be made.

BS EN 10088-2:2014 Edition

BS EN 10088-2 was originally published in 1995. The second version, BS EN 10088-2:2005, has been superseded by BS EN 10088-2:2014.

The tables shown here only have the 2014 tensile property ranges of the austenitic-ferritic, (duplex), steels. Four new duplex grades, 1.4162, 1.4662, 1.4482, 1.4062 have been added.

BS EN 10088-2 mechanical properties – austenitic-ferritic (duplex) stainless steels

 

Designation Mechanical properties min unless stated
Steel name Steel number Product Proof strength Rp0.22),3) N/mm2 Tensile strength Rm N/mm2 Elongation4),5) %
Form1) Max thickness mm
Austenitic-ferritic stainless steels in the solution annealed condition-standard grades
X2CrNiN23-4 1.4362 C 8 450 650/850 20
H 13.5 400 650/850 20
P 75 400 630/800 25
X2CrNiMoN22-5-3 1.4462 C 8 500 700/950 20
H 13.5 460 700/950 25
P 75 460 640/840 25
Austenitic-ferritic stainless steels in the solution annealed condition-special grades
X2CrNiN22-2 1.4062 C 6.4 530 700/900 20
H 10 480 680/900 30
P 75 450 650/850 30
X2CrNiCuN23-4 1.4655 C 8 420 600/850 20
H 13.5 400 600/850 20
P 75 400 630/800 25
X2CrMnNiN21-5-1 1.4162 C 6.4 530 700/900 20
H 10 480 680/900 30
P 75 430 650/850 30
X2CrMnNiMoN21-5-3 1.4482 C 6.4 500 700/900 20
H 10 480 660/900 30
P 75 450 650/850 30
X2CrNiMnMoCuN24-4-3-2 1.4662 C 6.4 550 750/900 25
H 13 550 750/900 25
P 75 480 680/900 25
X2CrNiMoN29-7-2 1.4477 C 8 650 800/1050 20
H 13.5 550 750/1000 20
P 75 550 750/1000 20
X2CrNiMoCuN25-6-3 1.4507 C 8 550 750/1000 20
H 13.5 530 750/1000 20
P 75 530 730/930 25
X2CrNiMoN25-7-4 1.4410 C 8 550 750/1000 20
H 13.5 530 750/1000 20
P 75 530 730/930 20
X2CrNiMoCuWN25-7-4 1.4501 P 75 530 730/930 25
X2CrNiMoSi18-5-3 1.4424 C 8 450 700/900 25
H 13.5 450 700/900 25
P 75 400 680/900 25

Note

  1. C= Cold rolled strip; H= hot rolled strip; P= hot rolled plate.
  2. If, in the case of strip in rolling widths < 300mm, longitudinal test pieces are taken, the minimum proof strength values are reduced by 15N/mm2
  3. For continuously hot rolled products, 20N/mm2 higher minimum values of Rp0.2 may be agreed at the time of enquiry and order.
  4. The values apply for test pieces with a gauge length of 80mm and a width of 20mm. Test pieces with a gauge length of 50mm and a width of 12.5mm can also be used.
  5. The values apply for test pieces with a gauge length of 5.65 So0.5

 

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