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Related martensitic and precipitation hardening stainless steel grades

Introduction

The table is intended to relate former BS, En, German and Swedish grade designations to the current EN steel numbers, AISI grades, (‘grades’ in (brackets) are not a true AISI grades), and UNS, (Unified Numbering System), numbers. The table is based on the ‘wrought’, i.e. long products, (bars etc.), flat products, (plates etc.), steel numbers published in EN 10088 and related standards. Castings products use different compositions and so have their own steel numbers in EN 10283. The related castings grades in both EN 10283 and BS 3100 are included in the table.

The ‘Composition Guide’ is intended to represent the composition only. This does not show the specified or typical compositions of commercially available steels. Specified ranges for the wrought European grades can be found in either the BS EN 10088-2 or BS EN 10088-3 tables. Most of the specified ranges for the ‘BS’ grades can be found in the BS 1449 or BS 970 tables. The castings grades specified ranges can be found in the BS EN 10283 or BS 3100 tables. Direct links to tables giving the specified range is available for the grades with underlines in the table. Just click on the number.

As an alternative to scanning down the list try the ‘find’ facility on your keyboard, using the ‘Ctrl’ and ‘F’ keys together. Type in the term you are looking for in the dialog box that then appears.

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.

Grades table

EN (10088) Common Names BS (Wrought) AISI UNS En German SS EN (10283) BS (Cast) Composition Guide
. . . .. . . . . . . C Cr Ni Mo Others
1.4006 F6a 410S21 410 S41000 56A X10Cr13 2302 1.4011 410C21 .08-.15 12 – – –
1.4005 – 416S21 416 S41600 56AM X12CrS13 2380 – – .08-.15 12 – – .35xS
1.4021 – 420S29 420 S42010 56B X20Cr13 2303 – 420C28 .16-.25 12 – – –
1.4028 – 420S45 420 S42000 56D X30Cr13 2304 – – .26-.35 12 – – –
1.4029 – 416S37 420F S42020 56CM – – – – .25-.32 12 – – .35xS
1.4031 – 420S45 420 S42000 56D X39Cr13 2304 – – .36-.42 13 – – –
1.4034 – – – – – X46Cr13 – – – .43-.50 13 – – –
1.4057 – 431S29 431 S43100 57 X20CrNi17-2 2321 – – .12-.22 15 2 – –
1.4104 – 416S29 416 – 56BM X12CrMoS 2383 – – .10-.17 16 – 0.4 .35xS
1.4112 – – 440B S44003 – X90CrMoV18 – – – .85-.95 17 – 1.0 0.1V
1.4116 – – – – – X45CrMoV15 – – – .45-.55 14 – 0.6 0.1V
1.4122 – – – – – X35CrMo17 – – – .33-.45 16 – 1.0 –
1.4125 – – 440C S44004 – X105CrMo17 – – – .95-1.2 17 – 0.6 –
1.4313 F6NM – – S41500 – X3CrNiMo13-4 2385 1.4317 – 0.05x 12 3 0.5 0.02N
1.4418 248SV – – – – X4CrNiMo16-5 2387 1.4405 – .06x 15 4 1.0 .02N
1.4532 15/7PH – 632 S15700 – X8CrNiMoAl15-7-2 – – – 0.10x 15 7 2.0 1.2Al
1.4542 17/4PH – 630 S17400 – X5CrNiCuNb17-4 – 1.4525 – .07x 17 4 – 4.0Cu
1.4568 17/7PH – 631 S17700 – – – – – .09x 17 7 – 1.0Al
1.4594 520B 460S52 – – – – – – – 0.7x 14 5 1.5 1.5Cu

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

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