where the size and location of the equipment to be welded makes preheating impossible, but the design is such that expansion and contraction caused during welding will warp or highly stress the metal, the following steps should be observed :
(1) Pause between passes to allow heat to dissipate.
(2) Lightly peen with round hammer before each deposits solidifies and while it is still hot.
(3) By making separate weld deposits and then going back over and filling in, you will avoid localized excess heat.
Do not weld on a surface that has been prepared by grinding wheel. Most grinding wheels are contaminated with foreign matter. The grinding wheel can rub this contamination into the surface of the iron. More important the grinding wheel picks up graphite with each revolution.
The incomparable electrode MAGNA 777 welds all types of cast iron and steel to cast iron, without preheating, fully machinable,non cracking,higher tensile strength than most types of cast iron.
where the size and location of the equipment to be welded makes preheating impossible, but the design is such that expansion and contraction caused during welding will warp or highly stress the metal, the following steps should be observed :
(1) Pause between passes to allow heat to dissipate.
(2) Lightly peen with round hammer before each deposits solidifies and while it is still hot.
(3) By making separate weld deposits and then going back over and filling in, you will avoid localized excess heat.
Do not weld on a surface that has been prepared by grinding wheel. Most grinding wheels are contaminated with foreign matter. The grinding wheel can rub this contamination into the surface of the iron. More important the grinding wheel picks up graphite with each revolution.
The incomparable electrode MAGNA 777 welds all types of cast iron and steel to cast iron, without preheating, fully machinable,non cracking,higher tensile strength than most types of cast iron.
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