LOW TEMPERATURE CARBON STEEL

LOW TEMPERATURE CARBON STEEL

LOW TEMPERATURE CARBON STEEL –

Before explaining the LTCS we must know about the term DBTT.

What is called DBTT?

In case of any metal as the temperature increase the strength decreases. Reverse also should be true. As temperature decreases the strength should increases. As the temperature of material decreases, the ductile natures of material change to brittle.

For example if you take a rubber tube, dip it in liquid nitrogen and then hammer the same, the rubber tube breaks like glass. Thus each material has temperature at which properties of material changes from ductile to brittle. This temperature is called ductile to brittle transition temperature.

What is low temperature carbon steel?

Carbon steel can be converted from ductile to become brittle around zero degree C. The properties of material can be modified during the manufacturing stage so that DBTT can be further lowered. Such steel are called low temperature carbon steel (LTCS).

These steel are subjected to impact test loading at the low temperature to satisfy the low temperature design requirement. Killed carbon steel can be used up to -29 degree C. Below this temperature usually austenitic stainless steel can be used.

LTCS is normally used in cryogenic service or fluids that can cause a reduction in temperature in case of a leak. For example in case of LPG is a gas at ambient condition. 

But it is transported or stored as liquid under pressurize condition. In case of minor leaks, the escaping liquid gets converted into gas very rapidly   by collecting the heat from surrounding. This can result in a low temperature zone and if DBTT is reached, then pipe or equipment material can fail in a catastrophic manner.

To avoid this LTCS is used. These steel undergo special manufacturing process and the steel should have minimum impact load test value.

 

 

 

 

 

2 thoughts on “LOW TEMPERATURE CARBON STEEL”

  1. My husband and i have been fulfilled that Emmanuel managed to round up his homework from your ideas he got from your site. It is now and again perplexing just to be giving freely instructions which often people today could have been selling. So we understand we need the writer to thank for this. The entire illustrations you made, the straightforward blog menu, the friendships you will aid to instill – it is many wonderful, and it’s leading our son in addition to our family do think that subject matter is satisfying, which is certainly extremely serious. Thank you for the whole lot!

  2. I simply wanted to type a simple comment in order to thank you for all the superb suggestions you are showing on this site. My time-consuming internet search has at the end been honored with high-quality tips to share with my two friends. I would declare that we website visitors actually are unequivocally fortunate to dwell in a fantastic community with so many brilliant people with very helpful advice. I feel extremely blessed to have seen your weblog and look forward to some more excellent moments reading here. Thank you once more for everything.

Leave a Reply

Your email address will not be published. Required fields are marked *