Can ductile iron be welded to steel?

Yes, cast iron can be welded to steel. Gray iron and ductile iron will act differently. Regardless, you should be able to weld any of these together with steel, but you don’t want a weak weld because you thought you had cast iron when you really have something with a higher melting temperature.

Why is cast iron not weldable?

The key reason why welding cast iron can be problematic is the high carbon content. During the welding process, this carbon migrates into the weld metal and/or the heat affected zone adjacent to the weld metal, causing elevated hardness/brittleness. This is how Cast Iron gets its reputation for post weld cracking.

What types of iron Cannot be welded?

As nodular and malleable irons are less likely to form martensite, they are more readily weldable, particularly if the ferrite content is high. White cast iron which is very hard and contains iron carbides, is normally considered to be unweldable.

What happens if malleable cast iron is welded?

Malleable iron cannot be successfully fusion welded and retain its unique properties; to put it another way, you can weld malleable iron as easily as you can weld gray iron, but in the act of welding you will convert some of the malleable iron casting into a gray iron casting.

Can you weld on ductile iron pipe?

Of the different cast irons, ductile iron is one of the easiest to weld because the base metal is less susceptible to cracking in the parent metal.

Is it possible to weld ductile iron pipe?

Ductile Iron can be welded successfully to produce welds that have mechanical properties comparable to those of the base iron. As with any base material, the success of welding Ductile Iron depends on suitable equipment, correct procedures, qualified welders, and effective quality control procedures.

Can you weld ductile iron?

Ductile iron is more susceptible to welding stresses, and more likely to crack while welding or during cooling. Therefore, highly stressed ductile iron castings or portions thereof should never be welded. It is recommended not to perform welds if their section is more than 20\% of the metal thickness.

Can iron be welded?

It is possible to weld cast iron, although it can be problematic due to the high carbon content. All categories of cast iron except white iron are considered as weldable, although the welding can be significantly more difficult compared with carbon steel welding.

Is ductile cast iron weldable?

Can ductile iron be welded?