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Hi Sudhakar,
The rationale provided in your clients’ specification on SMAW welding consumable for -1960 C impact is not correct. SMAW and GTAW consumables conforming to 308L grades will happily meet the Charpy impact requirements @ -1960 C.
308L SMAW welding electrodes are well formulated and manufactured to meet -1960 C impact. You may take look at the products of Kobelco, NC 38LT(308L) & NC 36LT(316L).
In fact, 308L welding consumables always exhibits superior impact than SS 316L at -1960 C.
Sec VIII, DIV-1, UHA -51, illustrates the various technical requirements for cryogenic -1960 C design services , including “Ferrite Requirements”.
Thanks.
Pradip Goswami.P.Eng, IWE.
Independent & Consulting Welding & Metallurgical Specialist
Linkedin: https://www.linkedin.com/in/pradip-goswami-2999855/
Email:pgos...@rogers.com,pradip....@gmail.com
Cell/Whasapp:1-905-9793232
Welding Handbook Quick View || Products || KOBELCO - KOBE STEEL, LTD. - (kobelco-welding.jp)
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