what metal is similar to a514 grade 4140

Here is an answer grade for grade. A 51465 VS. A 51400A A 51465 differs from A 51400a at dozens of points. Table B–6 summarizes the substantial ones. Unlike standards such as A 36, which have simple, nonproprietary chemistry requirements, each variant chemistry in A 514 represents a single mill's 100 ksi steel. For instance, Brockenbrough and Johnson (1968) identify A 514 Grade F as USS T1, A 514 Grade B as USS T1 Type A, and A 514 Grade H as USS T1 Type B. page 83: wtc.nist.gov/pubs/NISTNCSTAR13ADraft.pdf2The main characteristic of T1 is that it is a quench and tempered steel. It gets its properties from heat treatment rather than alloying. There are a large number of international equivalents from Europe, Scandanavia, Japan and here in Australia. The steel is readily weldable and can be post weld heat treated or stress relieved but at a lower temperature than mild steel. A suitable stress relieve temperature is 580C +/10CHi Folks Had an opportunity to talk to a fella from USS Steel a few years back, he indicated that unless required specifically by Code to avoid PWHT of these materials if possible, they are apparently very susceptible to grain boundary embrittlementespecially the older plate material. He also indicated that the effect is cumulative, that is to say that it gets worse with each PWHT cycle the material undergoesso it may not fail after the first PWHT cycle but you could have significantly decreased toughness in the HAZ. We had a situation several years ago where it was impossible to weld repair the material as it kept cracking about 24 48 hrs after PWHT. The material was preheated during welding,MPI and Radiographed after welding and before PWHT, no cracks were foundbut after PWHT we never were able to do the MPI or Radiography as it had already cracked. I believe some grades are more susceptible than others, there have been several papers published by USS Steel on the topic, unfortunately I dont know where the ones I had are now. A real eye opener to readThank you RPRad I could not open or download the link provided by unclesyd vis: wtc.nist.gov/pubs/NISTNCSTAR13ADraft.pdf But I am thinking that the spec might even include the warning about PWHT and Thermal Stress Relief for the particular culprit alloys.Sorry that link didn't work for you as it still works for me. I think here is all the information you will ever need for your project with T1 or 514 ht tp://a rcelormitt al/pla teinformat ion/docume nts/en/Inl andflats/P roductBroc hure/ARCEL ORMITTAL%2 0A514%20AN D%20T1_20 080514.pdf ww w.arcelorm ittal/ plateinfor mation/doc uments/en/ Inlandflat s/Applicat ions/ARCEL ORMITTAL%2 0HOW%20TO% 20WELD.pdfunclesyd, Thanks Good links. I tried to copy and paste but the file will not allow copying. In the first link, each and every Grade of either A514 or T1 has one or the other of two footnotes (one crusifix or two crusifix): one crusifix = PWHT may degrade strength and toughness two crusifix = may be susceptible to cracking in the heat affected zone of the welds during postweld heat treatment (stress relief). In the second link near the bottom: Rule 4: Use caution in applying PWHTseveral paragraphs delineaing the ill effects of PWHT i.e. cracking, brittleness.. In essence the steel supplier is recommending to not PWHT This is not a project of mine. Please refer to the OP and thread330263985: Welding 4140 to T1 high tensile steel : Welding 4140 to T1 high tensile steel My concern was that I saw no recommendations about PWHT on that thread but, I just reread the Origianl Posting at the above thread which included the comment: Quote (kroppkaka (Computer)): We can't reheat treat this joint after welding. so I guess I beat that dead horse well beyond its second death! I suppose overkill would be more succinct.AWS D1.1 Equivalent steels AWS (welding) Code Issues Dec 05, 20124140 Alternatives? Metal and Metallurgy engineering Jan 11, 2012See more resultsSpecifications·