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9
LEARNING TO STICK WELD
9
After welding Cast Iron, protect the casting against
fast cooling. Put it in a sand (or lime) box.
If sand or lime is not available, cover it with sheet
metal or any other non-flammable material that will
exclude drafts and retain heat.
Cast Iron Plate Preparation
Wherever practical, the joint to be welded should be
“veed” out by grinding or filing to give complete pene-
tration. This is especially important on thick castings
where maximum strength is required. In some
instances a back-up strip may be used and plates
may be gapped 1/8" (3.2mm) or more.
On sections where only a sealed joint is required and
strength is not important, the joint may be welded after
slightly veeing out the seam as shown.