An assessment of creep strength reduction factors for 316L(N) SS welds

Mathew, M. D. ; Latha, S. ; Bhanu Sankara Rao, K. (2007) An assessment of creep strength reduction factors for 316L(N) SS welds Materials Science and Engineering: A, 456 (1-2). pp. 28-34. ISSN 0921-5093

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Official URL: http://linkinghub.elsevier.com/retrieve/pii/S09215...

Related URL: http://dx.doi.org/10.1016/j.msea.2006.11.087

Abstract

Nitrogen-alloyed type 316L stainless steel is the major structural material for the high temperature structural components of prototype fast breeder reactor. For the welding electrode, carbon in the normal range of 0.045-0.055 wt% and nitrogen in the range of 0.06-0.1 wt% are used to provide weld joints with adequate long term creep strength. Characterization of the creep properties of the base metal, weld metal and weld joint has been carried out at 873 and 923 K at stress levels of 100-325 MPa with rupture lives in the range of 100-33,000 h. Weld strength reduction factors (WSRFs) based on the weld metal, and weld joint have been evaluated, and compared with the codes. WSRFs for the weld joint were higher than the RCC-MR values. Base metal showed the highest rupture life at all the test conditions whereas the weld metal generally showed the lowest rupture life. All the weld joint specimens failed in the weld metal.

Item Type:Article
Source:Copyright of this article belongs to Elsevier Science.
Keywords:Creep; ASME; RCC-MR; Design; 316L(N) SS; Weld Strength Reduction
ID Code:18370
Deposited On:17 Nov 2010 09:22
Last Modified:18 May 2011 05:43

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