Really, before comparison, we require to clarify meaning. The cast iron is suggesting a group of iron product, whose carbon content is more than 2.1%. For that reason, it consists of many different kinds according to different graphite forms and also microstructures, such as grey iron, ductile iron, white iron, flexible iron, vermicular iron, austenitic iron, and so on.
As a result, strictly speaking, you can not compare cast iron with ductile iron, since ductile iron is simply a sort of cast iron. However, you might find the material demands simply written as “Cast Iron”, and no other requirements. Under these scenarios, according to our experience, the developer’s meaning was “grey iron”.
Why do we say so? Because grey iron is one of the most common cast iron products, and also its manufacturing cost is the most affordable one compared with all other cast iron materials. So, if the consumers just needed to utilize “cast iron”, after that the grey iron will be the very best choice.
Ok, so let us compare ductile iron with all other cast iron.
Benefits:
Ductile iron is likewise extremely usual and good material worldwide. It has the following advantages:
1. Fully grown manufacturing innovation.
Many iron factories might create ductile iron effectively, their physical residential properties could be managed purely. Grey iron additionally has these benefits, a lot of iron shops could generate grey iron extremely well too, but when it comes to other cast iron products, not many factories might create them.
2. Low cost.
Costs are always a crucial concern for customers. Ductile iron just needs some additional nodular representative products than grey iron, so its manufacturing costs are just some higher than most inexpensive grey iron, yet much lower than flexible iron as well as austenitic iron. This is likewise the major reason that pliable iron is replacing flexible iron.
3. Excellent mechanical residential properties.
Ductile iron has some good mechanical properties than other cast irons. For example, its highest tensile stamina can get to 900 Mpa, the largest prolongation can reach 18%, moreover, its has good influence residential property, even great impact building in reduced temperature level condition. In addition, after ideal heat treatment, its physical residential properties could be improved substantially.
Negative aspects:
No any type of product is excellent, pliable iron also has some disadvantages.
1. Somewhat high manufacturing prices.
Although we claimed ductile iron is not pricey, its rates are not the most affordable. It is still more expensive compared to grey iron, as a result of additional spheroidizing agent alloys, and also pig iron of high quality. So, if grey iron can meet your needs and application, then you must not choose ductile iron.
2. Relatively high needs for quality control.
When it comes to grey actors iron, the primary assessment of material quality is just tensile toughness, only if you have special demands to the hardness. So, also the traditional cupola heating system could produce this product very well.
Nevertheless, ductile iron needs to inspect tensile strength, return strength, elongation, solidity, nodular rate (spheroidization rate. For that reason, it needs the ductile spreading manufacturers to have enough experience and also equipment to create the spreadings, as well as evaluate their quality in-house.
3. Can not satisfy some unique physical needs.
Although ductile iron has superb mechanical residential properties, yet it can not cover all facets. For example, compared to ductile iron, grey actors iron has far better resistance to deformation throughout home heating, so most range, as well as central heating boiler parts, were made of grey iron. Additionally, as for some alloy irons, they will certainly have better homes, such as anti-heating, wear-resisting, corrosion-resisting. Flexible iron has better ductility, and austenitic iron has higher tensile strength.
Here, allow us briefly introduce the primary distinctions between ductile iron as well as grey iron.
Ductile iron has greater tensile toughness, yield stamina, and also elongation.
Grey iron has reduced prices, as well as less complicated to be created.
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