![]() While seamless tubing was a common mark of quality cycle tubing of yesteryear, fewer brands have chosen to explicitly state that their tubes are seamless (Columbus Zona only, Tange Prestige/Ultimate only, etc.) with the assumption that others are seam welded DOM. ![]() It is typically supplied normalized and stress-relieved state (Reynolds 520/525, Columbus Cromor/Zona, Tange Champion, Dedacciai BKS, Variwall Chromoly CMH, NOVA CRMO, Kaisei CR-MO black label, etc.) but also available in “heat-treated” (quenched and tempered) form (Reynolds 725, Tange Prestige/Ultimate, Dedacciai HTS, Variwall Chromoly CMD, Kaisei Ultima blue label, etc.). If you choose to be offended by the information provided here because it may contradict what you think you know, stop reading immediately, or at the very least take a few minutes to think about it in good faith and try to form a well reasoned counterargument rather than throw a incoherent tantrum.Ĥ130 (25crmo4) is a type of chromium-molybdenum steel (crmo, cromo, chromoly, etc.) which is the most commonly used alloy steel used in steel bicycle frame manufacture. You are free to judge the quality of information yourself. It is not marketing spiel and I claim no particular authority or expertise on the matter. These are more or less my personal notes and research, shared here and adapted in article form for the benefit of anyone interested in the subject, and not for my benefit. ![]() All further notes on the matter are private for the time being and will not be published. #Welding 4130 standard notes updateDISCLAIMER: Due to not-so-recent events and harassment, I have no plans to update or finish this page at this time. ![]()
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