Flame cut surfaces

This is common of flame cut surfaces that are over 12mm thick. The smooth surface is the side the cutting torch was on and is where most of the heat was absorbed causing the silicon in the steel to oxidise. Lower down had less heat and so more silicon will be available which will cause a thicker coating than the top surface. This can be avoided by grinding back the heat affected surface to remove this heat afected zone. it is not detrimental and is acceptable.

rough, inconsistent, build-up, edge

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