creep range creep range mech212 (Mechanical) (OP) 25 Oct 17 13:26 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 ? RE: creep range EdStainless (Materials) 25 Oct 17 13:30 Look in the allowed stress tables, below the dark line is creep limited. = = = = = = = = = = = = = = = = = = = = P.E. Metallurgy, Plymouth Tube RE: creep range metengr (Materials) 25 Oct 17 13:41 The time dependent (creep) allowable stress values are in ASME Section II, part D in italicized font. RE: creep range mech212 (Mechanical) (OP) 25 Oct 17 13:52 Merengr , I have ASME Section 2 part D ,, but can't find th exact page , I found wording about time dependant only but I can't find the table RE: creep range metengr (Materials) 25 Oct 17 14:29 Ok, the table in the 2015 Edition of ASME B&PV Code is 1A. Page 20, the time dependent values start at 750 deg F for SA 516 Gr 70. RE: creep range TGS4 (Mechanical) 26 Oct 17 15:35 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). RE: creep range metengr (Materials) 26 Oct 17 16:01 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. RE: creep range DSB123 (Mechanical) 5 Dec 17 07:30 TGS4, Metengr, Agree with you on the lower temperature at which creep starts but it is hard to convince people of this. RE: creep range ironic metallurgist (Materials) 12 Dec 17 21:09 DSB123, If it can happen it will happen, somewhere, sometime. Materials are perverse that way. "Everyone is entitled to their own opinions, but they are not entitled to their own facts." RE: creep range pradipgoswami (Materials) 12 Dec 17 23:16 Hi Mech212, In addition to the guidance provided by metengr, you may find additional resources at this link http://www.ommi.co.uk/etd/eccc/advancedcreep/DShee.... 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. Pradip Goswami,P.Eng.IWE Welding & Metallurgical Specialist Ontario,Canada. ca.linkedin.com/pub/pradip-goswami/5/985/299 RE: creep range DSB123 (Mechanical) 20 Dec 17 12:48 ironic metallurgist, Eh????