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WELDMAT.TXT
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1991-02-05
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Coated electrodes and welding wires are available for all grades of stainless
steel. The following table lists the normal and, when there is one, a
generally acceptable alternate selection. Acceptable alternates are those
that have strength and corrosion resistance equal to or greater than the base
metal. The proper AWS designation for electrodes is the alloy designation
preceded by E, for example, E 308; for bare wires it is ER as, ER 308. The
AWS designation should be used for designating filler materials as there are
slight differences in filler metal and base metal composition. For example,
type 304L is welded with E308L or ER308L, not 304L.
FILLER METALS FOR WELDING STAINLESS STEELS
Base Metal Coated Electrode SMAW Welding Wire TIG/MIG
Normal Alternate Normal Alternate
201 E 308 ER 308
410 E 410 E 410 NI Mo ER 410
430 E 430 ER 430
301 & 302 E 308 ER 308
304 E 308 E 308H / E 347 ER 308 ER 347
304L E 308L E 347 ER 308L ER 321 / ER 347
321 E 321 E 347 / E 308L ER 347 ER 347 / ER 308L
347 E 347 ER 347
316 E 316 E 317 ER 316 ER 317
316L E 316L E 317L ER 316 ER 317L
317L E 317L E 904L ER 317L ER 904L
904L Alloy 625 E NiCrMo 3 Alloy 625 ER NiCrMo 3
329 E 312Mo ER 312Mo
309 E 309 E 310 ER 309 ER 310
310 E 310 ER 310
330 E 330 ER 330
WELD OVERLAYS
Carbon steel E 309 or E 310 to match 304 ER 309 or ER 310
Carbon steel E 309LMo to match 316L ER 309LMo
Steel Mill Rolls E 420 ER 420
There are a number of unsatisfactory combinations. Two deserve special
mention. First, the lower strength of the L grades limits their usefulness
as a filler metal for the standard grades. Second, the lower corrosion
resistance of the Mo free grades can lead to preferential corrosion of the
weld metal should they be used as filler metal for the Mo containing grades.
Additional information on welding of stainless steel is available in:
"Welding of Stainless Steels and Other Methods of Joining", available from
NiDI, Literature Item 9 002.
"Welding Handbook", American Welding Society, 550 NW Le Jeune Road, POB
351040, Miami, FL 33135.
"Metals Handbook", Ninth Edition, Volume 6, Welding, Brazing
and Soldering, Metals Park, Ohio 44073.