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cast iron Welding rod for sale


cast iron Welding rod ENI-CI(Shijiazhuang Shiqiao electric welding material Co.,Ltd.)

  A cast iron is an alloy of iron, carbon, and silicon, in which the amount of carbon is usually more than 1.7 percent and less than 4.5 percent. The overall weldability of cast iron is low and depends on the material type, complexity, thickness, casting complexity and need for machinability. Ductile and malleable irons have good weldability while grey cast iron and white cast iron are only weldable for small attachments.

The most widely used type of cast iron is known as gray iron. Gray iron has a variety of compositions but is usually such that it is primarily perlite with many graphite flakes dispersed throughout.

There are also alloy cast irons which contain small amounts of chromium, nickel, molybdenum, copper, or other elements added to provide specific properties.

Notes:

1. The electrodes must be baked under about 150℃ for an hour before welding.

2. For some key casting structures receiving stress, impact, etc., this kind of electrodes are not suitable.

3. The flaws on the low rigidity surfaces of little thin section castings can be given repair welding without preheating. However, general weldments need to be preheated to 400℃ and given insulation work and slow cooling after welding so that the repaired places may be able to be given machine work.

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