I have a heat exchanger of material SA516-70 , I need to know the creep range of this material and other material , where can I find such a data whether in a code or website ?
For the first time that I can recall, I am actually going to disagree with metengr . The italics that he refers to are when the allowable stress becomes governed by time-dependent behaviour.
However, that is NOT when creep starts. For that, you will need to refer to API 579-1/ASME FFS-1, Table 4.1, titled "Temperature Limit Used To Define The Creep Range". Here, you will find that the creep range actually starts at a lower temperature than would be inferred by the italics method in Section II, Part D. SA-516 Gr. 70, being a carbon steel with a UTS > 60 ksi would start the creep range at 700°F (371°C).
TGS4 you are technically correct, if you only accept FFS-1 versus ECCC versus NIS creep-rupture data and definitions. I could disagree on the temperature when creep-rupture begins as defined by FFS-1 versus the approach by Section II, part D. I am going on memory here but the European Creep Collaborative Committee (ECCC) publishes an even lower threshold creep temperature than what is published in FFS-1 or even the time dependent value in Part D.
The steel specifications mentioned in these data sheets conforms to European Specifications. However nearest ASME/ASTM equivalence could always be found by proper searches.
Hope this would help you.
Thanks.