EN 10088-2 Mechanical Properties of Duplex Stainless Steel
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 8 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.
EN 10088-2 was originally published in 1995. The second, current version, EN 10088-2:2005, has superseded EN 10088-2:1995, which was withdrawn by BSi on 20th June 2005.
The tables shown here only have the 2005 tensile strength property ranges of the austenitic-ferritic duplex steel. Three new 'special' duplex grades, 1.4655, 1.4477 and 1.4424 have been added.
The maximum thickness ranges for the specification of mechanical properties have been extended for strip products.
Cold rolled strip, C has been increased from 6 to 8mm max. Hot rolled strip, H has been increased from 12 to 13.5mm max
Changes, usually involving increases, have been made to some of the specified proof, tensile strength and elongation properties for grades S32304 1.4362, S31803 1.4462, 1.4507 and S32750 1.4410.
EN 10088-2 mechanical properties - austenitic-ferritic (duplex) stainless steel
| Designation |
Mechanical properties min unless stated |
| Steel name |
Steel number |
Product |
Proof
strength Rp0.22),
N/mm2 |
Tensile strength Rm N/mm2 |
Elongation
% |
| Form1) |
Max thickness mm |
| Austenitic-ferritic stainless steels in the solution annealed condition-standard grades |
| X2CrNiN23-4 |
1.4362/S32304 |
C |
8 |
450 |
650/850 |
20 |
| H |
13.5 |
400 |
650/850 |
20 |
| P |
75 |
400 |
630/800 |
25 |
| X2CrNiMoN22-5-3 |
1.4462/S31803 |
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 |
| X2CrNiCuN23-4 |
1.4655 |
C |
8 |
420 |
600/850 |
20 |
| H |
13.5 |
400 |
600/850 |
20 |
| P |
75 |
400 |
630/800 |
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/S32550 |
C |
8 |
550 |
750/1000 |
20 |
| H |
13.5 |
530 |
750/1000 |
20 |
| P |
75 |
530 |
730/930 |
25 |
| X2CrNiMoN25-7-4 |
1.4410/S32750 |
C |
8 |
550 |
750/1000 |
20 |
| H |
13.5 |
530 |
750/1000 |
20 |
| P |
75 |
530 |
730/930 |
20 |
| X2CrNiMoCuWN25-7-4 |
1.4501/S32760 |
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
- C= Cold rolled strip; H= hot rolled strip; P= hot rolled plate.
- 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
- For continuously hot rolled products, 20N/mm2 higher minimum values of Rp0.2 may be agreed at the time of enquiry and order.
- 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.
- The values apply for test pieces with a gauge length of 5.65 So0.5
 EN 10088-2 Stainless steels - Part 2: Technical delivery conditions for sheet/plate and strip of corrosion resisting steels for general purposes
Related References:
1. EN 10088-2 Mechanical Properties of Precipitation Hardening Stainless Steel Flat
2. Availability of Stainless Steel Flat Grades EN 10088-2
3. EN 10088-2 Mechanical Properties of Austenitic Stainless Steel
4. EN 10088-2 Mechanical Properties of Martensitic Stainless Steel
5. EN 10088-2 Mechanical Properties of Duplex Stainless Steel
6. EN 10088-2 Mechanical Properties of Ferritic Stainless Steel
7. EN 10088-2 Chemical Composition Stainless Steel
8. Permissible Analysis Tolerances on Cast Ranges in EN 10088-2
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