If you are looking for ER2553 or E2553-15, try Euroweld. Their website is http://www.euroweld.com/index.html. Telephone number in USA is 704-662-3993, ask for Bill Newell.
MBSims,
ANSI/AWS 2553, Ni=4.5-6.5%, and N=0.10-0.25% is not comparable to the DP3W, where Ni=6.0-8.0%, and N=0.24-0.32%. Both Ni and N being strong austenite formers, I don't think 2553 is the best choice. Although 2553 is the only "Super Duplex" filler metal listed in ANSI/AWS, there are better propritary filler metals out there for welding DP3W. The most popular being the Avesta 2507/P-100.
CM
Either one is appropriate.
Both may be appropriate, but the Ni content should really be taken into consideration. "Over-alloying" is always considered best.
I agree that overalloying is generally better. But in duplex alloys the pitting rate is lowest when ferrite and austenite are balanced approximately equal. It is possible to overdo it with the austenite formers.
By -
Date 03-30-2005 13:35
This is true, but when a duplex is being welded, the deposited weld metal is 100% ferrite and as it cools down the austenite starts to form around the ferrite boundaries. Thus, your two phase structure. Research shows that >25FN and <75FN is acceptable for corrosion resistance to the "regular" and "super duplex" materials. When I referring to overalloying, I was referring to filler metal vs. base metal. Thank you for all your comments as they are very informative.
CM
By -
Date 03-30-2005 03:14
Giovanni,
CD3MWCuN (UNS39274) is a Duplex, but is considered a "Super Duplex" due to the 25% chromium. The only filler metals currently listed in ANSI/AWS A5.4-92, ANSI/AWS A5.9-93, and the latest revision of ANSI/AWS A5.22-95, are 2209 (used for welding the "regular" grades of Duplex containing 22% chromiun ) and 2553 (used to weld the 25% chromium). In your case, CD3MWCuN contains a nickel content of 6-8%, which is not the amount contained in ANSI/AWS for 2553. For welding this particular grade of Super Duplex, I would recommend the Avesta 2507/P-100 filler material. It is a propriatory grade used to weld Super Duplex. The filler metal nominal composition is 25%Cr-9Ni-4Mo-N, which matches your chemical composition much closer than the 2553. I am the Welding Engineer for Avesta Welding Products and am quite familiar with welding Super Duplex materials.
CM
The trade name for ASTM A351 CD3MWCuN is Zeron 100- a tungsten containing super-duplex (that is what the W in the CD3MWCuN is for), which was developed by Wier materials in the UK. The same grade of casting can also be found in ASTM A890 Grade 6A. Unlike most mateirals, this alloy was actually developed as a casting first, and then as wrought material instead of the other way around. The appropriate filler metal (typical of duplex stainless steel, has a matching chemistry with slightly overmatching nickel in order to maintain the ferrite balance) is also named Zeron 100. I have used Zeron 100XKS from Metrode . We have used it with and without solution annealing after welding. I think Wier also makes filler metal for this alloy. If for some reason you cannot obtain Zeron 100 filler metal, the next closest available would be 2507 type already mentioned. It will not have as good of corrosion resistance in some situations though.
A link to Wier's welding guide is below
http://www.weirclearliquid.com/weir/clearliquid/rwpattach.nsf/VAP/ZERON_WeldingGuide.pdf/$FILE/ZERON_WeldingGuide.pdf
Grateful to All
We go to use the EN 12072 25.9.4.LN (2507)
Thanks.
By -
Date 03-30-2005 13:38
Excellent choice!!
