ESW Instead of SAW
ESW Instead of SAW
(OP)
dear freinds,
when we can use ESW instead of SAW? what are their main differences? is it a factor of material?
regards,
when we can use ESW instead of SAW? what are their main differences? is it a factor of material?
regards,





RE: ESW Instead of SAW
Quick Comparisons;
Electroslag welding is a very high deposition rate process that is commonly used to join plates that are 5" and over in thickness. ESW does not really use an arc for melting, instead, the arc is used to being the process and molten slag that remains on top is what carries electric current while feeding filler wire. Only one single pass is required resulting in less angular distortion.
Submerged arc welding can be used on heavy plate, but it is a lower deposition process in comparison to ESW.
RE: ESW Instead of SAW
The main consideration is that ESW deposition rates are about twice that of SAW.
Steve Jones
Materials & Corrosion Engineer
http://www.pdo.co.om/pdo/
RE: ESW Instead of SAW
RE: ESW Instead of SAW
Low temperature, as defined by your construction code, is going to limit the application of ESW when notch toughness is a consideration. Make sure you review the impact testing requirements of your fabrication/construction code to make sure you qualify the welding procedure correctly, i.e., include notch toughness testing.
As the material thickness increases, and the temperature decreases, notch testing comes into play and increases the difficulty in obtaining acceptable results.
Best regards - Al
RE: ESW Instead of SAW
Report no. FHWA-SA-96-053
Technical Information Guide for Narrow-Gap Improved Electroslag Welding
Report No. FHWA-SA-96-052
Process Operational Guide for Narrow-Gap Improved Electroslag Welding
Report No. FHWA-SA-96-051
Training Manual for Narrow-Gap Improved Electroslag Welding for Bridges
These publications are more than 10 years old, so you might want to contact the researchers (who are now at Portland State) for updates.
Hg
Eng-Tips policies: FAQ731-376
RE: ESW Instead of SAW