Structural steel in cold climates 1

[qu4a]

What grade of steel should be used in climates with sub-zero temperatures? There is a European grade of steel, 355NL, that is certified to meet an average charpy impact test requirement of 27 Joules at -50°C in the longitudinal orientation. Does this imply that it is suitable to be used in situations where the temperature drops to -50°C (I know this an extreme temperature but it's the concept I'm checking and not this particular temperature). I generally work in Africa but have recently had an enquiry about a steel structure in a cold climate and need advice on how to proceed.

 

[WillisV]

There have been several threads on this topic - try searching for them.

For instance see my response in thread507-168729

 

[JoeTank]

My expertise is mostly in the tank and vessel world where material toughness at lower temperatures is critical. You might want to look at API Standard 620, Appendix R for the rules for low temperature storage tanks down to -60F. There are specific requirements for the structural members used for roof supports that may be usedful to you.

Joe Tank