Ceramic backing

Elga Ceramic Backing is used to provide root pass

support when welding from one side only and is

an extremely effective way to rationalise welding

procedures and reduce production costs. Welding

of root passes is normally the most critical part of

the weld and hence the most costly. By using Elga

ceramic backing, you can reduce production costs

substantially.

Benefits with Elga Ceramic Backing

Reduced production costs:

•฀ Eliminates the need for back-gouging, grinding

and rewelding operations on the reverse side.

•฀ Significant savings in costs associated with

turning large and heavy plates or structures

in order to weld the second side in the flat

position.

•฀ Increased productivity when welding root runs

in position 1G/PA, 2G/PC and 3G/PF.

•฀ Simpler joint preparation and reduced set-up

time because tolerances for the root gap are

greater.

•฀ Use of higher welding currents, which means

higher deposition rates and increased productivity.

Typical examples of ceramic backing applications.

Useful tips when using Elga Ceramic Backing

Quality improvements:

•฀ Use relatively low current/welding speed.

For Elgacore < 200A and < 200 mm/min, for

Cromacore < 160A.

•฀ Smooth, even root bead with slightly convex

profile and excellent blend-in with base

material.

•฀ Dirt, mill scale, coatings and other contamination to be removed from the joint faces before

welding.

•฀ The ceramic material does not emit fumes and

contains no moisture. Ideal for low-hydrogen

applications.

•฀ When welding in enclosed spaces the working environment is not polluted by fumes

from arc-air gouging, grinding and rewelding

operations.

•฀ End craters should be fully ground out.

•฀ Maximum 1 m root run at a time, before next

pass applied.

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