Steel profiles/shapes for low temperature service

[muratkandaz]

Hello everyone;

I have found tonnes of references regarding low-temperature materials for pressure vessels, pipes, fittings and so on, but couldn't find out a standard/code for steel shapes. I have got a structure mainly composed of L-beams and I-beams that is to be built under -30 degrees Celcius. I'd be grateful if someone at least give an idea about material selection.

 

[metengr]

The steel shapes you refer to can be purchased for various grades of steel suitable for low temperature service - as you stated in your post. Once you decide on a specific material, put a specification together and check various sources for availability of steel shapes.

 

[muratkandaz]

Could you have any idea regarding toughness specifications (in Joules) of carbon steels for low-temperature service?

 

[metengr]

Yes, for structural applications, the typical values I have seen are 20 J @ 4 deg C for A 36, for A 572 material - 20 J at 4 deg C, and for A 514 plate steels (up to 2.5") - 34 J at -18 deg C. The notch toughness values are for service temperatures at or above -34 deg C.

Source; US Army Corp of Engineers

 

[CoryPad]

metengr,

Negative energy?

Regards,

Cory

Please see FAQ731-376 for tips on how to make the best use of Eng-Tips Fora.

 

[metengr]

Corypad;

Nope.

34J @ -18 deg C
20J @ 4 deg C

I was attempting to use hyphens (spaced away from the number) versus the negative sign. Sorry about the confusion.

 

[muratkandaz]

Thanks a lot. T StE's or E StE's in DIN norm seem to be OK i suppose.

 

[arto]

see if you can get "14004 - NICKEL STEELS IN ARCTIC SERVICE"
from NiDI:

http://www.nickelinstitute.org/index.cfm/ci_id/13112/la_id/1.htm