Can anyone please tell me what is the DUCTILE TO BRITTLE TRANSITION TEMPERATURE IN STEEL LOW CARBON?Thanks.
Transition Temperature Of Steel
The temperature varies with the type of low carbon steel and how it is heat treated. Common structural steel actually have a transition temperature as defined by Charpy impact tests to be in the 50 degree range. Most low carbon steel pipe such as ASTM A53, A106 and pressure vessel plate such as A212, a515 also have 50 degree range Charpy test results. If you look at materials with fine grain such A516 plate, A300 pipe and similar materials then the transition temperature drops to around -50 degrees. The thing to remember is in addition to the transition temperature you also have to have the material at a high stress level, a stress riser such as a notch and then the sudden application of additional stress to get an actual brittle fracture failure. That is why bridges make from common structural steel don't fail at temperatures as low as -40 degrees.
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