weld 1100 - shielded metal arc welding - College of Eastern Utah
weld 1100 - shielded metal arc welding - College of Eastern Utah
weld 1100 - shielded metal arc welding - College of Eastern Utah
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Weld Backing - Supports Weld Pool and<br />
Provides Root Contour.<br />
4 Types <strong>of</strong> Backing:<br />
– Backing Strip - Usually made from the same material as the<br />
<strong>weld</strong> joint. The root pass <strong>weld</strong>s the backing strip to the back <strong>of</strong><br />
the joint. Can be left in place or removed later.<br />
– Copper Backing Bar - Does not fuse (<strong>weld</strong>) to the joint.<br />
Supports the molten <strong>weld</strong> puddle. Used for its high thermal<br />
conductivity. (Aluminum is also sometimes used.)<br />
– Non<strong>metal</strong>lic Backing - Usually consists <strong>of</strong> ceramic segments<br />
or a granular flux.<br />
– Backing Weld - A <strong>weld</strong> made from the back-side <strong>of</strong> the joint<br />
before the groove is filled from the face side.
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