Steel for cold application

Steel for Cold Application
Dear All,
We are discussing a project inRussia to build a portal reclaimer to install at Minus (-) 25 degree Celsius.
Can anyone please recommend the appropriate structural steel suitable for this application especially in IS or ASTM Standards??
Also what are the other areasto take care??
Best Regards,
S.T RAJESH
-------------------------
TAKRAF India Pvt. Ltd.,
94/3, TTK Road, Alwarpet,
Chennai - 600 018. INDIA.
Email: s.rajesh@takraf.com
Refer to waiwhite 11th February 2011, 1:41
#2
Originally Posted by strajesh
Dear All,
We are discussing a project in Russia to build a portal reclaimer to install at Minus (-) 25 degree Celsius.
Can anyone please recommend the appropriate structural steel suitable for this application especially in IS or ASTM Standards??
Also what are the other areas to take care??
Your first point of contact should be you steel producers.They are the best source of such information.
Low temperatures can do strange things to mechanical properties. Not only will steel become more brittle, but you can see odd things happeningto UTS and yield points.
In many cases, the steel producers will not give you a yield point, but a 0.2% proof stress (sometimes just called proof stress). This is because there is no significant yield point at these low temperatures. The 0.2% proofstress is the stress at which you will see a permanent 0.2% strain in the test samplewhen the load is removed. What this means is that you need to be careful when selecting the design limit state as there is no effective yield in the material. With such materials, the 0.2% proof stress is substituted for the yield stress, however you cannot use the limit state that you would normally use for material that had a yield point and so a point of plasticity.
Many years ago, I was ProductDevelopment Engineer with Dexion Australia. Our pallet racking was used in freezers, and in the main, we did not have to do anything as far as load capacity was concerned. One thing we did have to do was to halve the allowable beam deflection as with the standard deflection limit, the two part interlocking C section beams would open upand then when the load was removed, the beam sections would not return to their normal positions. Even when removed from the freezers and allowed to get to room temperature, they would not return to their normal positions.