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What is the the advantage of gray and white cast iron over malleable and ductile cast iron?
Wiki User
∙ 11y ago
Gray iron with small amounts of magnesium and cesium which nodulates the graphite, resulting
- high strength
- high ductility
White cast iron heat-treated to improve
- higher ductility
Wiki User
∙ 11y ago
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Is malleable iron a cast iron or wrought iron?
Malleable means can be hammered. Cast iron will crack or break into pieces; it's not malleable. The word wrought means hammered. You could have used a dictionary for definitions; this isn't really an engineering question. The cast iron with carbon content of less than 0.2% is called wrought iron or pure iron. Wrought iron is very soft, plastic and easily deformed, but its strength and hardness are lower, so not widely used. Malleable cast iron is produced from white cast iron, which is made from hot liquid iron with certain chemical components. The white cast iron needs to be treated by malleablizing, such as graphitizing or oxidation and decarbonization, then its metallographic structures or chemical components will be changed, so can become into malleable cast iron. +++ So yes, Malleable Iron is a Cast Iron, but a much less brittle species enabling it to be used almost as a grade of steel. It is an important mechanical-engineering material. ' Wrought Iron was the ancestor of Mild Steel but became obsolete and no longer made, by the early 20C. It was very uneconomical, as well as very labour-intensive in very unpleasant conditions to make; and its internal structure and inconsistent quality rendered it totally unsuitable for the new engineering demands developing rapidly from the 1850s onwards.
What is a cast iron?
This is an interesting question, and I have made a research for it. However, it is difficult to answer it by short words. Cast iron is made from remelting pig iron, usually with some quantities of scrap iron, scrap steel and some alloys, such as Cr, Ni, Mo and Cu according to the different requirements. Depending on the specific application, iron foundries reduce the carbon and silicon content to the desired levels from 2 to 3.5% and 1 to 3% respectively. Other alloys and elements are also added during melting process according to the different requirements. With the different melting and inoculation processes, the different cast irons will be produced. There are several main types of cast iron, such as white cast iron, grey cast iron, ductile cast iron, malleable cast iron. For the detail information about them, you can refer to the related links below. I wrote this article, so I bet it will be helpful for you to comprehensively learn about cast iron.
What is the yield strength of cast iron?
For the usual run of cast iron, The yield stength almost coincides with its fracture strength - cast iron is very brittle and fractures at usually more than 20000 pounds per square inch. DUCTILE cast iron is one of the several irons that DO yield before cracking.
Is cast iron different from iron?
cast iron consists of 2% - 4% of carbon in it. cast iron is pig iron remelted and thereby refined together with definite amount of limestone,steel scrap, and spoiled castings. it consists of small % of sulphur, silicon,phosphorus and manganese wrought iron is highly refined iron with a small amount of slag forged out into fibres. it consists of 99% iron. it is almost the purest form of iron. it is highly ductile,rusts extremely quickly, it cannot be heat treated
How do brittle and ductile materials differ in their behaviour in a compression test?
(a) Ductile materials: For ductile material such as mild steel, the load Vs compression diagram would be as follows(1) The ductile materials such as steel, Aluminum, and copper have stress - strain diagrams similar to ones which we have for tensile test, there would be an elastic range which is then followed by a plastic region.(2) The ductile materials (steel, Aluminum, copper) proportional limits in compression test are very much close to those in tension.(3) In tension test, a specimen is being stretched, necking may occur, and ultimately fracture fakes place. On the other hand when a small specimen of the ductile material is compressed, it begins to bulge on sides and becomes barrel shaped as shown in the figure above. With increasing load, the specimen is flattened out, thus offering increased resistance to further shortening ( which means that the stress - strains curve goes upward ) this effect is indicated in the diagram.Brittle materials ( in compression test )Brittle materials in compression typically have an initial linear region followed by a region in which the shortening increases at a higher rate than does the load. Thus, the compression stress - strain diagram has a shape that is similar to the shape of the tensile diagram.However, brittle materials usually reach much higher ultimate stresses in compression than in tension.For cast iron, the shape may be like thisBrittle materials in compression behave elastically up to certain load, and then fail suddenly by splitting or by craking in the way as shown in figure. The brittle fracture is performed by separation and is not accompanied by noticeable plastic deformation.
What are the uses of cast iron?
Cast iron mainly includes grey cast iron, ductile cast iron and malleable cast iron. As for ductile iron, it has very wide application, such as Pressure pipes and fittings, Automotive applications, Agriculture, road and construction applications, General engineering applications. As for the specific application of ductile iron, grey iron and malleable cast iron, please refer to the links below.
What is the difference between ductile iron and malleable iron?
Malleable cannot be broken like a cast fitting can be and normally malleable fittings / pipe do not have a seam +++ Its full name is Malleable CAST Iron - it is cast as "ordinary" cast-iron but is a lot less brittle. It is an important material combining some of the properties of cast-iron with those of mild-steel.
What iron is made by annealing white cast iron?
malleable cast iron has temper graphite
What are the differences between the black heart and white heart malleable cast iron?
see black tempering and white tempering of white cast iron.
Why is iron malleable and ductile?
Malleabilty and ductility are properties stemming from how metals bond on a molecular level. Covalent and metallic bonds allow molecules to flex, before breaking. As opposed to ionic bonding, which is sensitive to being bent; ionic bonds are brittle
What is the colour of iron after rusting?
As for the most of rough surfaces of cast iron, the color is grey. Such as normal grey cast iron and ductile iron. The ductile iron will be more white than grey cast iron. There are few types of vermicular cast iron, which are black. The white cast iron will show white color. So, cast iron has different color, such as grey, black, white according to different types. However, most of cast iron castings need surface coating, such as painting or electroplate, so they will show different colors than their own.
Who is the Non ductile metals?
Cast iron, is one example of a non-ductile metal. Unlike ductile metals, copper, steel, aluminium - cast iron is too brittle to be reworked.
What are three physical properties of aluminum?
There are three physical properties of aluminum foil. The three properties are solid, ductile, and malleable.
Is cast iron a real iron?
Yes it is ferrous metal try using a magnet if you don't believe meThe main raw material for producing cast iron is pig iron, so yes, the chemical components of cast iron is almost as same as the irons you can see in daily life.Actually, most of iron parts and articles in industrial and civil uses should be made by casting process, so actually, they are cast iron articles.There are many different types of cast irons, such as white cast iron, grey cast iron, ductile iron, malleable cast iron. If you are interested to them, you can refer to the related links below.
What ductile cast iron used for?
Water mains. Sewer line.
How can you tell if a pipe fitting is cast or ductile iron?
Hit it with a sledge hammer.
Is malleable iron a cast iron or wrought iron?
Malleable means can be hammered. Cast iron will crack or break into pieces; it's not malleable. The word wrought means hammered. You could have used a dictionary for definitions; this isn't really an engineering question. The cast iron with carbon content of less than 0.2% is called wrought iron or pure iron. Wrought iron is very soft, plastic and easily deformed, but its strength and hardness are lower, so not widely used. Malleable cast iron is produced from white cast iron, which is made from hot liquid iron with certain chemical components. The white cast iron needs to be treated by malleablizing, such as graphitizing or oxidation and decarbonization, then its metallographic structures or chemical components will be changed, so can become into malleable cast iron. +++ So yes, Malleable Iron is a Cast Iron, but a much less brittle species enabling it to be used almost as a grade of steel. It is an important mechanical-engineering material. ' Wrought Iron was the ancestor of Mild Steel but became obsolete and no longer made, by the early 20C. It was very uneconomical, as well as very labour-intensive in very unpleasant conditions to make; and its internal structure and inconsistent quality rendered it totally unsuitable for the new engineering demands developing rapidly from the 1850s onwards.
