Stainless Steel Pipe Fittings

Duplex Stainless Steel Grades Comparison Table By

Written by
Duplex Stainless Steel Grades Comparison Table By

The Duplex Stainless Steel Grades Comparison Table is intended to relate former BS, EN, German and Swedish grade designations to the current EN duplex stainless steel numbers, AISI grades and UNS (Unified Numbering System) numbers. The table is based on the ‘wrought’ ie long products (duplex stainless steel pipes etc), pipe fitting products (duplex stainless steel eccentric reducer, etc), duplex stainless steel numbers published in EN 10088 and related standards. 
Castings products use different compositions and so have their own duplex stainless steel numbers in EN 10283. The related castings grades in both EN 10283 and BS 3100 are included in the table.

The ‘Chemical Composition’ is intended to represent the composition only. This does not show the specified or typical composition of commercially available duplex stainless steels. Specified ranges for the wrought European grades can be found in either the EN 10088-2 or EN10088-3 tables. None of the duplex stainless steels listed were included in either BS 970 or BS 1449. The castings grades specified ranges can be found in the EN 10283 or BS 3100 tables.

These are comparisons only and cannot be assumed to be direct equivalent grades. The data given is not intended to replace that shown in individual standards to which reference should always be made.

Duplex Stainless Steel Grades table

EN 10088 Common Names BS Wrought AISI UNS En German DIN SS EN 10283 BS Cast Chemical Composition
. . . . . . . . . . C Cr Ni Mo Others
1.4162 LDX 2101 S32101 0.030x 21.5 1.5 0.3 5Mn
1.4362 SAF2304/UR35N S32304 X2CrNiN23-4 2327 0.030x 22 4 0.4 0.4Cu
1.4410 SAF2507
S32750 2328 1.4468 0.030x 24 6 3
1.4460 453S 329 S32900 X4CrNiMoN27-5-2 2324 0.05x 25 5 1.5
1.4462 SAF2205/Falc223
318S13 S31803 S32205 X2CrNiMoN22-5-3 2377 1.4470 332C15 0.030x 22 5 3
1.4501 Zeron 100/F55 S32760 1.4417 0.030x 24 6 3 0.5W
1.4507 Ferralium 255
S32550 0.030x 24 6 3 1Cu

Note Chemical composition figures are intended to be representative of the grade, not typical. ‘x’ indicates a maximum

Source: Zhejiang Yaang Pipe Industry Co., Limited (

Article Categories:
Duplex Stainless Steel

Leave a Comment

Your email address will not be published. Required fields are marked *