BS and Equivalent EN Grades
abc® Aalco is a registered trademark of Aalco Metals Ltd
© Copyright: Aalco Metals Ltd, The Hersham Centre, Hersham Green, Hersham, Surrey KT12 4HP
All Data is indicative only and must not be seen as a substitute for the full specification from which it is drawn. In particular, the
mechanical property requirements vary widely with product form and product dimensions. For more complete details please refer to
the relevant specification – Specifications for Stainless Steel are listed on a separate Datasheet.
1
The Specifications
Listed below are the EN Specifications
relating to Chemical Composition and
Mechanical Properties that have replaced
The old BS Specifications.
BS1449 for cold rolled has been replaced by:
Standard Scope
EN10088-2 Replaces BS1449-Part 2: 1983
EN10059 Covers Heat Resisting Grades
BS1449 & BS1501 for hot rolled have been
replaced by:
Standard Scope
EN10088-2 Replaces BS1449-Part 2: 1983
EN10028-7 Replaces BS1501-Part3: 1990
EN10095 Covers Heat Resisting Grades
BS970 for bar has been replaced by:
Standard Scope
EN10088-3 Replaces BS970 Part 1: 1991 &
BS970 Part 3: 1991 covering
chemical composition &
mechanical properties
Be Aware!
♦ 27 grades in BS have been replaced by 68
grades in EN and thus many EN grades do not
have an old BS equivalent
♦ Most BS Grades do not have an EXACT EN
equivalent grade
♦ In some cases one EN grade has replaced
more than one BS grade, for example:
o 304S15, 304S16 & 304S31 have all
been replaced by 1.4301
♦ In other cases more than one EN grade could
be considered in place of a BS grade, for
example:
o 304S11 could be replaced by
1.4307, 1.4306 or 1.4311
♦ Mechanical Properties have been changed
♦ Tensile strengths are now higher and a
maximum is stipulated
♦ Chemical Compositions vary slightly with Nickel
contents being slightly lower
Examples
BS EN AISI
304S11 1.4306
1.4307
1.4311
304L
304S15 1.4301 -
304S16 1.4301 -
304S31 1.4301 304
304S61 1.4311 304LN
316S11 1.4404 316L
316S31 1.4401 316
316S61 1.4406 316LN
320S31 1.4571 316Ti
- 1.4432 316 High Mo
303S31 1.4305 303
321S31 1.4541 321
309S16 1.4833 309
310S24 1.4845 310
317S12 1.4438 317L
301S21 1.4310 301
409S19 1.4512 409
430S17 1.4016 430
410S21 1.4006 410
416S21 1.4005 416
431S29 1.4057 431
904S13 1.4539 -
This information is based on our present knowledge and is given in
good faith. However, no liability will be accepted by the Company is
respect of any action taken by any third party in reliance thereon
As the products detailed may be used for a wide variety of purposes
and as the Company has no control over their use; the Company
specifically excludes all conditions or warranties expressed or
implied by statute or otherwise as to dimensions, properties and/or
fitness for any particular purpose. Any advice given by the Company
to any third party is given for that party’s assistance only and without
liability on the part of the Company.
Any contract between the Company and a customer will be subject to
the Company’s Conditions of Sale. The extent of the Company’s
liabilities to any customer is clearly set out in those Conditions; a
copy of which is available on request.
BS and Equivalent EN Grades
abc® Aalco is a registered trademark of Aalco Metals Ltd
© Copyright: Aalco Metals Ltd, The Hersham Centre, Hersham Green, Hersham, Surrey KT12 4HP
All Data is indicative only and must not be seen as a substitute for the full specification from which it is drawn. In particular, the
mechanical property requirements vary widely with product form and product dimensions. For more complete details please refer to
the relevant specification – Specifications for Stainless Steel are listed on a separate Datasheet.
2
Stainless Steel Grades, Compositions & Typical Mechanical Properties
EN BS AISI EN No. Composition Guide Typical Mechanical Properties (Rolled Products)
Obsolete C Cr Ni Mo Others Proof Strength 0.2% Nmm2 Tensile Strength Nmm2 Elongation %
1.4000 403S17 410S – 0.08x 12 . . . 220-250 400-600 19
1.4002 405S17 405 – 0.08x 12 . . 0.2 Al 210-250 400-600 17
1.4003 – – – 0.03x 11 0.5 . . 250-320 450-650 18-20
1.4016 430S17 430 60 0.08x 17 . . . 240-280 430-630 18-20
1.4113 434S17 434 – 0.08x 17 . 1 . 260-280 450-630 18
1.4509 – – – 0.015x 18 . . Nb, Ti
1.4510 – 430Ti – 0.05x 17 . . 0.6 Ti 230-240 420-600 23
1.4511 – 430Nb – 0.05x 17 . . 0.6Nb 230-240 420-600 23
1.4512 409S19 409 – 0.03x 11 . . 0.5 Ti 210-220 380-560 25
1.4521 – (444) – 0.025x 17 . 2 0.6 Ti
1.4006 410S21 410 56A .08-.15 12 . . . 400-450 550-850 12-20
1.4005 416S21 416 56AM .08-.15 12 . . .35xS 450 650-850 12
1.4021 420S29 420 56B .16-.25 12 . . . 450-550 650-950 10-15
1.4028 420S45 420 56D .26-.35 12 . . . 600 740-1000 10-15
1.4029 416S37 416 56CM .25-.32 12 . . .35xS
1.4057 431S29 431 57 .12-.22 15 2 . .
1.4104 416S29 416 56BM .10-.17 16 . 0.4 .35xS 500 650-850 10
1.4112 – 440B – .85-.95 17 . 1.0 0.1V 900 max 12
1.4125 – 440C – .95-1.2 17 . 0.6 . 900 max 12
1.4594 460S52 – – 0.7x 14 5 1.5 1.5Cu 700-1000 930-1270 10
1.4749 – 446 – .15-.20 26 . . 0.2N
1.4301 304S31 304 58E 0.07x 18 8 . . 210-260 520-750 45
1.4303 305S19 305 – 0.06x 18 11 . . 200-250 500-650 45
1.4305 303S31 303 58M 0.10x 18 8 . 0.35xS 190-230 500-700 35
1.4306 – 304L – 0.030x 18 10 . . 200-250 500-670 45
1.4307 304S11 304L – 0.030x 18 8 . . 200-250 500-670 45
1.4310 301S21 301 – 0.05/0.1 517 6 . . 250-280 600-950 40
1.4311 304S61 304LN – 0.030x 18 9 . 0.22xN 270-320 550-750 40
1.4372 – 201 – 0.15x 17 4.5 . 6.5Mn 330-380 750-950 40
1.4401 316S31 316 58J 0.07x 17 11 2 . 220-270 520-680 40
1.4404 316S11 316L – 0.030x 17 11 2 . 220-270 520-680 40
1.4406 316S61 316LN – 0.030x 17 11 2 0.22xN 280-330 580-780 40
1.4432 316S13 316L – 0.030x 17 11 2.5 . 220-270 520-700 40
1.4435 316S13 316L – 0.030x 17 13 2.5 . 220-270 520-700 40
1.4436 316S33 316 58J 0.05 17 11 2.5 . 220-270 500-730 40
1.4438 317S12 317L – 0.030x 18 13 3 . 220-270 520-720 35
1.4439 – – – 0.030x 17 13 4 0.22xN 270-320 580-780 35
1.4541 321S31 321 58B 0.08x 18 9 . 0.5Ti 200-250 500-720 40
1.4550 347S31 347 58F 0.08x 18 9 . 0.5Nb 200-250 500-720 40
1.4571 320S31 (316Ti) – 0.08x 17 11 2 0.5Ti 220-270 520-690 40
1.4539 904S13 – – 0.020x 19 24 4 2xCu 220-270 520-730 35
1.4547 – – – 0.020x 20 18 6 1xCu 300-350 650-850 35
1.4833 309S16 309 – 0.15x 22 12 . .
1.4845 310S24 310 – 0.10x 25 20 . .
1.4878 321S51 321H – 0.10x 18 9 . 0.6Ti