Please see the following from Praxair, Gas Metal Arc Welding of Stainless Steel:
Silicon – Silicon acts to deoxidize the weld
puddle. Silicon reacts with oxygen in the
weld puddle before metallic elements such
as iron and chromium. This deoxidation
cleans the puddle, and silicon dioxide impurities
float to the surface of the puddle.
They then freeze (along with manganese
dioxide) to form slag islands. Silicon is also
added in higher concentrations to some
filler materials to improve the fluidity of
the puddle. When silicon reacts with oxygen,
heat is released (exothermic reaction)
which makes the puddle more fluid. High
silicon wires can create more slag islands
that may cause more grinding in multipass
weldments. High silicon wires are not
recommended for joints under extreme
restraint as the crack resistance of the
standard filler metals is superior.
My opinion is that it would be suitable for your purpose with the knowledge that your weldors may have to pay more attention to removing any silicon islands that form between passes.
John A. Henning
Welding & Materials
From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] On Behalf Of mohamed elsayyid
Sent: Sunday, June 30, 2013 10:24 PM
To: materials-welding@googlegroups.com
Subject: [MW:18059] ER316LSi
Dear Experts,
the subject filler ER316Lsi was rejected by the client at Kazakhstan can you explain the silicon factor and can i use it on 316L stainless steel lines that we use for sewage water treatment ? please advise.
Best Regards,
Eng. / Mohamed El Sayed
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