The materials you mention are probably according to European standards
EN10025 / EN10028 when it's material for pressure vessels. I checked
both specificaions but they don't mention S355 Gr. 12 or Gr.15. In my
opinion material with this code doesn't exist. I looked for you in the
Key for Steel (Stahlschlüssel), but there are all different kind of
S355 materials but no Gr.12 and/or Gr.15. Codes used for this kind of
material are for example S355J2G3, S355M or S355NL.
If you are looking for a similar material for S355 you can use ASTM
A516 Gr.70 material. Ask for a copy of material certificate in front
of purchasing the material and please look carefully to yield strength
and impact values specified on the material certificate before
acceptation of the material, this because the requirements for S355
are a little bit higher as for A516 Gr.70 but most Gr.70 material does
met the requirements of S355. For S275 you may use A516 Gr.60 or 65
with the same precaution as for Gr. 70.
Hope this will help you out.
Best regards,
Herman Pieper
On 20 jun, 07:41, Muhammed Ibrahim <ibrat...@gmail.com> wrote:
> Hi Gents,
> Good morning,
>
> Any body can advice equalent API matrial for
>
> S355 Gr.12 --
>
> S355 Gr.15 --
>
> S275 --
>
> Thanks & Regards
> Muhammed Ibrahim PK
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