Operation and maintenance manual

General Information - Welding Procedure
Section 000-0010
SM 2172 10-02
2
3. Pre-heat area to 100° C (212° F), measured 3 - 4"
either side of repair. Avoid local overheating.
4. Weld completely using E-7016 electrodes. Care
must be taken to ensure electrodes are protected from
moisture pick-ups at all times.
5. Allow repair weld to cool slowly.
6. Grind and blend repair to original contour. Paint
heat damaged areas.
The following general procedure should be used for
the repair of defects in alloy steel castings and in the
welds joining steel castings.
1. Completely ARC-AIR gouge or grind out the crack
until sound metal is reached. If ARC-AIR method is
employed, pre-heat area to 200° C (392° F), measure
3 - 4" either side of repair prior to gouging. On
completion of gouging grind to remove thin carbon
layer.
2. Apply dye-penetrant check to ensure crack has
been completely removed.
3. Pre-heat area to 200° C (392° F), measured 3 - 4"
either side of repair. Avoid local overheating.
4. Weld completely using E-7016 electrodes. Care
must be taken to ensure electrodes are protected from
moisture pick-ups at all times.
5. On completion of welding, post-heat repair area to
400° C (752° F), measure 3 - 4" either side of repair.
6. If welding has to be interrupted for any reason, e.g.
overnight, post-heat immediately as in Step 5.
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