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Discussion Forums - The Hendrix Group
HomeHomeDiscussionsDiscussionsOil Refinery Co...Oil Refinery Co...Welding of Dissimilar MaterialWelding of Dissimilar Material
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2/9/2008 9:00 AM
 
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Hi, I am working for one job which need to make welding joint of SS304 to Monel 400. I have no experience on this practice, could anybody give me some information or precaution regarding the job. Besides, is this kind of joint may create galvanic corrosion ? I would appreciate if anybody can give me welding procedure for this kind of job. The welding joint will be for pure oxygen gas pipe line at maximum 50 degree C fluid service temperature and 30 barG pressure. Asep Karmana E.Alfi
 
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2/13/2008 9:00 AM
 
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It will be very difficult to find a proper filler metal for your Job. SS304 and Monel are very distant on galvanic table; for sure in such welding you will get galvanic corrosion. Why don%E2%80™t you make your joint through flanges with a proper gasket system to avoid metallic bolting contact between flanges? Regards Luis Marques
 
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2/18/2008 9:00 AM
 
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I agree with the wise statements above. Development of proceedure for this particular welded joint will be difficult to make and the welded joint will always be a source of doubt. For an oxygen pipeline, why cannot a mechanical joint (pipe flanges of different materials) be made at the change in material ? -MJC
 
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