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Chemical composition of stainless steels to BS 3605

Introduction

BS 3605 was published in two parts. Part 1 covered seamless pipes and tubes and part 2 covered welded pipes and tubes. All of these products were intended for pressure purpose applications.
The steel compositions were common to both parts of the standard, so are only shown once in the table in this article.
Both parts of BS 3605 are now withdrawn, (as at March 2005). Part 1 has been replaced by BS EN 10216-5 and part 2 by BS EN 10217-7. The BS 3605 grade designations have not been used in the new European Standards, but are shown in this article for historical interest.

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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 3605 chemical composition table

Grade
Chemical composition (% by mass – max unless stated)
C Si Mn S P Cr Ni Mo Others
215S15 0.06/0.15 0.20/1.00 5.50/7.00 0.030 0.040 14.0/16.0 9.00/11.00 0.08/1.20 V 0.15/0.40:Nb 0.75/1.25:B 0.003/0.009
304S11 0.030 1.00 2.00 0.030 0.040 17.0/19.0 9.0/12.0
304S31 0.070 1.00 2.00 0.030 0.040 17.0/19.0 8.0/11.0
304S51 0.04/0.10 1.00 2.00 0.030 0.040 17.0/19.0 8.0/11.0
316S11 0.030 1.00 2.00 0.030 0.040 16.5/18.5 11.0/14.0 2.00/2.50
316S13 0.030 1.00 2.00 0.030 0.040 16.5/18.5 11.5/14.5 2.50/3.00
316S31 0.070 1.00 2.00 0.030 0.040 16.5/18.5 10.5/13.5 2.00/2.50
316S33 0.070 1.00 2.00 0.030 0.040 16.5/18.5 11.0/14.0 2.50/3.00
316S51 0.04/0.10 1.00 2.00 0.030 0.040 16.5/18.5 10.5/13.5 2.00/2.50
316S52 0.04/0.10 1.00 2.00 0.030 0.040 16.5/18.5 10.5/13.5 2.00/2.50 B 0.0015/0.006
321S31 0.080 1.00 2.00 0.030 0.040 17.0/19.0 9.0/12.0 Ti 5C/0.80
321S51 0.04/0.10 1.00 2.00 0.030 0.040 17.0/19.0 9.0/12.0 Ti 5C/0.80
347S31 0.080 1.00 2.00 0.030 0.040 17.0/19.0 9.0/13.0 Nb 10C/1.00
347S51 0.04/0.10 1.00 2.00 0.030 0.040 17.0/19.0 9.0/13.0 Nb 10C/1.00

 

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