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Nickel is used mainly because cast iron is brittle and very suseptable to rapid heat change. The nickel rods allow the weld to heat and contract without causing cracks. you can also help this process be heating the cast iron to cherry red and when welded allow it to cool wrapped in rock wool. this allows for a slow cooling helping to prevent cracking.
What else can I help you with?
Can you weld a cracked cast iron pot belly stove?
yes, with a cast iron rod and an oxy-fuel set up or with a nickel rod and an arc machine
One should never cut or weld directly against?
You should not weld on concrete, as it can explode if heated
What is easier to weld carbon steel or cast iron?
any steel or alloy of iron and carbon having a carbon percentage of above 0.3% is difficult to weld. carbon steel can have maximum carbon percentage of about 2% and cast iron with carbon percentage between 2% to 4%. the welding of any iron alloy with carbon percentage above 0.3% becomes difficult because of the formation of the martensite in the welding areas, heat affected zone etc., the fusion welding process which is usually employed to weld carbon steel and cast iron takes the metal or alloy to their respective melting point (in this case about 1650 C) which is above the austenizing temperature of most steel and cast iron. when the weld is finished it undergoes a process similar to hardening. the nearby non heated parts of the welded material acts as the cold bath resulting in the hardening process which involves sudden cooling for the formation of martensite which is very brittle, any pressure applied will crack the weld immediately. hence before welding the nearby parts of the material to be welded is preheated so that they wont act as any cold bath. but any way cast irons are very difficult to weld than the steels. this is because of the fact that the martensite formed is as a result of trapped carbon atoms in the iron crystal making a distorted body centered tetragonal crystal structure(martensite). higher the percentage of carbon the martensite formation is even better. hence cast irons are especially difficult to weld. design engineers never suggest a welding process for cast iron. cast irons are welded only when there is no other choice but to weld it.
How do use braze cast iron?
yes it can although it is not reccomended, if this is your only option preheat the cast iron to almost cherry red and weld with a low hydrogen rod such as 7018
When and why you use oxy acetylene instead of arc welding?
Primarily when brazing cast iron. Nickel rods are available to arc weld cast iron but in most cases it has to be preheated and it takes experience to prevent cracking. Using oxy-acet provides a means to preheat, maintain the temperature, and braze. Welding, brazing, and silver soldering with oxy-acet have become lost arts. Most common metals can be welded with this process including steel and aluminum.
What type of electrode can you weld cast iron with?
nickel
Can you weld a cracked cast iron pot belly stove?
yes, with a cast iron rod and an oxy-fuel set up or with a nickel rod and an arc machine
How can you weld the pump case which is made with cast iron?
== ==
One should never cut or weld directly against?
You should not weld on concrete, as it can explode if heated
What is easier to weld carbon steel or cast iron?
any steel or alloy of iron and carbon having a carbon percentage of above 0.3% is difficult to weld. carbon steel can have maximum carbon percentage of about 2% and cast iron with carbon percentage between 2% to 4%. the welding of any iron alloy with carbon percentage above 0.3% becomes difficult because of the formation of the martensite in the welding areas, heat affected zone etc., the fusion welding process which is usually employed to weld carbon steel and cast iron takes the metal or alloy to their respective melting point (in this case about 1650 C) which is above the austenizing temperature of most steel and cast iron. when the weld is finished it undergoes a process similar to hardening. the nearby non heated parts of the welded material acts as the cold bath resulting in the hardening process which involves sudden cooling for the formation of martensite which is very brittle, any pressure applied will crack the weld immediately. hence before welding the nearby parts of the material to be welded is preheated so that they wont act as any cold bath. but any way cast irons are very difficult to weld than the steels. this is because of the fact that the martensite formed is as a result of trapped carbon atoms in the iron crystal making a distorted body centered tetragonal crystal structure(martensite). higher the percentage of carbon the martensite formation is even better. hence cast irons are especially difficult to weld. design engineers never suggest a welding process for cast iron. cast irons are welded only when there is no other choice but to weld it.
What is peening in welding?
It is one way to "Stress Relieve" the weld joint. As the weld metal metal cools it contracts and hammering on the weld expands it. On thick sections it is done after every layer of weld. Often used when welding cast iron or other metals with a low COE (Coefficient of Expansion).
Which is the iron that cannot be welded?
Cast iron is a type of iron that cannot be easily welded due to its high carbon content, which can lead to cracking during the welding process. Additionally, cast iron has a high melting point and poor ductility, making it challenging to weld compared to other types of iron.
How do use braze cast iron?
yes it can although it is not reccomended, if this is your only option preheat the cast iron to almost cherry red and weld with a low hydrogen rod such as 7018
What type of cement do you need to repair a cast iron bucket?
Depends on what you are using it for. If you aren't using it for preparing food products, JB Weld works wonders.
When and why you use oxy acetylene instead of arc welding?
Primarily when brazing cast iron. Nickel rods are available to arc weld cast iron but in most cases it has to be preheated and it takes experience to prevent cracking. Using oxy-acet provides a means to preheat, maintain the temperature, and braze. Welding, brazing, and silver soldering with oxy-acet have become lost arts. Most common metals can be welded with this process including steel and aluminum.
What welding process is used to weld cast iron?
arc welding such as SMAW (stick), GMAW (mig). Some cast metals may be brazed for certain applications. The actual properties of the Cast metal will be needed for the type of electrode and/or process.
Why is it important to strike the arc only on the weld joint?
why is it important only to strike the arc in the weld joint
