Gray cast iron composition pdf
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The properties of grey cast iron gray iron Iron foundry

gray cast iron composition pdf

Structure and Property Studies on Austempered and As-Cast. Investigation of Cast Iron Processing to Produce Controlled Dual Graphite Structure in Castings S.N. Lekakh, J. Qing, V.L. Richards Missouri University of Science and Technology, Rolla, MO, The composition of gray iron must be selected in such a way to satisfy three basic structural requirements: graphite shape and distribution, carbide-free (chill-free) structure,.

Effect of carbon content on friction and wear of cast irons

Effect of carbon content on friction and wear of cast irons. equivalent grey cast iron was investigated. The experimental results indicated that an increase in the niobium The experimental results indicated that an increase in the niobium content is favorable to refining the graphite and eutectic cell; and the pearlite lamellar spacing is reduced., Composition and Properties of some stainless steels are given in the next slide . Applications of Stainless steels Carbon 2.1- 4.5 wt% and Si (normally 1-3 wt%). Lower melting point (about 300 В°C lower than pure iron) due to presence of eutectic point at 1153 В°C and 4.2 wt% C. Low shrinkage and good fluidity and casting ability. Types of cast iron: grey, white, nodular, malleable and.

Gray iron is one of the oldest cast ferrous materials. In spite of competition from newer materials and their energetic promotion, gray iron is still used for those applications where its properties have proved it to be the most suitable material available. grey cast iron composition.pdf. 260. Single Casting Specimen Tensile Strength Property Gray Iron Casting, no any standard mentioned the chemistry composition, so we only suggest the following

Gray cast iron, compacted graphite iron and ductile iron are differentiated by the shape of the graphite particles. As shown in Figure 1, gray iron is characterized by randomly oriented graphite flakes while the graphite particles in ductile iron are present as individual spheres. In contrast, the graphite particles in CGI appear as individual ‘worm-shaped’ or vermicular particles. The Damping Properties of Selected Steels and Cast Irons By A. Visnapuu, R. W. Nash, and P ever, its composition, Co-22.5 Ni-l.8 Ti, is high in the critical metals cobalt and nickel, which must be imported, meaning that its use must be restricted to spe­ cial applications. Alternate approaches for damping com­ monly use shock absorbers, shock mounts, constrained-layer damping, and bonded-on

A high-strength and wear-resistant alloyed gray iron with ausferritic microstructure on solidification directly from molten condition could be made in a Ni and Mo alloyed gray cast iron. The as-cast ausferritic cast iron was compared with two conventionally austempered gray iron with and without Ni Silicon contents of less than 3.5% increase the rate of growth of gray cast iron by promoting graphitisation. However, silicon contents of 4% to 8% greatly reduce both oxidation (scaling) and growth.

A gray cast iron alloy is disclosed. The gray cast iron alloy includes carbon from about 3.05 to about 3.40 weight percent, niobium from about 0.05 to about 0.3 weight percent, and silicon from about 1.75 to about 2.3 weight percent. The gray cast iron alloy also includes nickel less than or … ASTM A48 Class 20 is a gray cast iron material grade of USA. This grade is equivalent with grey iron HT150, FC150, GG15, FGL150, T150, O150 in China and other countries. This grade is equivalent with grey iron HT150, FC150, GG15, FGL150, T150, O150 in China and other countries.

Gray iron, or grey cast iron, is a type of cast iron that has a graphitic microstructure. It is named after the gray color of the fracture it forms, which is due to the presence of graphite. [1] It is the most common cast iron and the most widely used cast material based on weight. CAST IRON TYPES The basic four types of cast iron are: gray CI. but were exposed to certain additions of alloying elements. excellent vibration damping capacity and good machineability. Gray Cast Iron (graphite flake cast iron): This type has the highest carbon content among the cast iron classes. there are other types that stem from the basic four types. . . The high silicon content increases

base chemistry was otherwise typical of Class 35 gray iron at a carbon equivalent (CE) value of 3.9 to 4.0 and sufficient alloying with Cu and Sn to assure a fully pearlitic structure. We've compared the qualities of the most basic forms of cast iron (gray iron) and cast steel (mild or carbon steel), but the specific composition and phase structure of iron and steel can greatly affect mechanical properties. For example, the carbon in a standard gray iron takes the form of sharp graphite flakes, while ductile iron features more spheroidal graphite structures. Flaked graphite

base chemistry was otherwise typical of Class 35 gray iron at a carbon equivalent (CE) value of 3.9 to 4.0 and sufficient alloying with Cu and Sn to assure a fully pearlitic structure. equivalent grey cast iron was investigated. The experimental results indicated that an increase in the niobium The experimental results indicated that an increase in the niobium content is favorable to refining the graphite and eutectic cell; and the pearlite lamellar spacing is reduced.

Qingdao Casting Quality Industrial Co., Ltd. Casting Material Grey Cast Iron Composition and Property Grey Cast Iron (Gray iron) is so called because of the colour of the fracture face. J. O. OLAWALE . ET AL. 45. water, cast iron and low alloyed steel. The chemical composition of cocoa liquor was evaluated by chemical analysis and the result is as presented in

The effect of inoculants on hardness and machinability of

gray cast iron composition pdf

Cast Iron Composition Lendi Agiawan Academia.edu. Transient thermomechanical analysis of automotive disc brake with gray cast iron composition - Volume 109 Issue 6 - A. Belhocine, M. Bouchetara Skip to main content We use cookies to distinguish you from other users and to provide you with a better experience on our websites., A high-strength and wear-resistant alloyed gray iron with ausferritic microstructure on solidification directly from molten condition could be made in a Ni and Mo alloyed gray cast iron. The as-cast ausferritic cast iron was compared with two conventionally austempered gray iron with and without Ni.

ASTM A48 CLASS 20 Gray Cast Iron

gray cast iron composition pdf

Investigation of Cast Iron Processing to Produce. We've compared the qualities of the most basic forms of cast iron (gray iron) and cast steel (mild or carbon steel), but the specific composition and phase structure of iron and steel can greatly affect mechanical properties. For example, the carbon in a standard gray iron takes the form of sharp graphite flakes, while ductile iron features more spheroidal graphite structures. Flaked graphite base chemistry was otherwise typical of Class 35 gray iron at a carbon equivalent (CE) value of 3.9 to 4.0 and sufficient alloying with Cu and Sn to assure a fully pearlitic structure..

gray cast iron composition pdf


The ductile iron treatment consists of composition control, melt pre-treatment, magnesium treatment and inoculation processing. Even small change in processing can be monitored by thermal analysis and its effects on final microstructure and mechanical properties were studied. Along with test cups, the tensile test bars were also poured and analyzed for correlating the mechanical properties Cast iron composition When carbon is added to iron, the result is a chemical compound called iron carbide (Fe 3C). Iron without carbon forms a body-centered crystal struc- ture called ferrite. Alternating plates of iron carbide and ferrite make up pearlite; as more carbon is added, a higher percentage of pearlite is formed in the matrix (Fig. 1). Pearlite forms in both steel and cast irons. As

chemical composition before the casting process, inoculants and cooling conditions [3]. Upon small degrees of super cooling, graphite is formed when the cast iron solidifies from its liquid state. Slow cooling promotes graphite formation whereas rapid cooling partly or completely suppresses graphitization and leads to the formation of cementite or carbides [4]. The effect of high cooling rates GREY IRON 4E Colour Code Yellow Typical Mechanical Properties Tensile Strength 220-260 MPa Hardness 170-220 BHN Stocked Sizes Available in continuous cast bar in sizes:

chemical composition before the casting process, inoculants and cooling conditions [3]. Upon small degrees of super cooling, graphite is formed when the cast iron solidifies from its liquid state. Slow cooling promotes graphite formation whereas rapid cooling partly or completely suppresses graphitization and leads to the formation of cementite or carbides [4]. The effect of high cooling rates CAST IRON TYPES The basic four types of cast iron are: gray CI. but were exposed to certain additions of alloying elements. excellent vibration damping capacity and good machineability. Gray Cast Iron (graphite flake cast iron): This type has the highest carbon content among the cast iron classes. there are other types that stem from the basic four types. . . The high silicon content increases

cast iron • The cast irons are the ferrous alloys with greater that 2.14 wt. % carbon, but typically contain 3-4.5 wt. % of C as well as other alloying elements, such as Investigation of Cast Iron Processing to Produce Controlled Dual Graphite Structure in Castings S.N. Lekakh, J. Qing, V.L. Richards Missouri University of Science and Technology, Rolla, MO

The general composition of gray cast iron is 95% iron by weight with an additional 2.1 to 4% being carbon and 1 to 3% silicon. Manganese and other impurities are also commonly found in or added to molten iron as needed for the diminishing or enhancement of specific properties. Sulfur, for example, is commonly introduced to the molten metal in order to increase hardness, which is otherwise low Transient thermomechanical analysis of automotive disc brake with gray cast iron composition - Volume 109 Issue 6 - A. Belhocine, M. Bouchetara Skip to main content We use cookies to distinguish you from other users and to provide you with a better experience on our websites.

Gray cast iron, compacted graphite iron and ductile iron are differentiated by the shape of the graphite particles. As shown in Figure 1, gray iron is characterized by randomly oriented graphite flakes while the graphite particles in ductile iron are present as individual spheres. In contrast, the graphite particles in CGI appear as individual ‘worm-shaped’ or vermicular particles. The machinability improvement in gray cast iron corresponds to the strength increase. This phase of the project included a preliminary study to ductile iron grades, some of which indicated a significant increase in strength.

A high-strength and wear-resistant alloyed gray iron with ausferritic microstructure on solidification directly from molten condition could be made in a Ni and Mo alloyed gray cast iron. The as-cast ausferritic cast iron was compared with two conventionally austempered gray iron with and without Ni J. O. OLAWALE . ET AL. 45. water, cast iron and low alloyed steel. The chemical composition of cocoa liquor was evaluated by chemical analysis and the result is as presented in

general term cast iron includes pig iron, gray iron, malleable iron, chilled iron, white iron, and nodular or ductile iron. If an iron alloy exceeds about 2% car-bon, the carbon does not have to nucleate from decomposition of austenite, but instead, it can form directly from the melt by a eutectic reaction. Note that cementite (Fe 3C) can still nucleate at the eutectic more readily than Selecting the proper grade of cast iron depends on the application. Important factors to consider include: machinability, wear and strength. Use the chart below or click on a particular grade of cast iron to learn whether it is a good fit for your application.

Structure and Property Studies on Austempered and As-Cast

gray cast iron composition pdf

ASTM A48 CLASS 20 Gray Cast Iron. A high-strength and wear-resistant alloyed gray iron with ausferritic microstructure on solidification directly from molten condition could be made in a Ni and Mo alloyed gray cast iron. The as-cast ausferritic cast iron was compared with two conventionally austempered gray iron with and without Ni, Gray cast iron is an alloy of iron, carbon, silicon, manganese, phosphorous and sulphur. In addition to these elements there are a number of trace elements present in the gray cast iron. The elements present in traces in gray cast iron have a significant effect on properties and graphitic structure. Hence it is important to understand its effects by the users and producers of such castings.

Effect of Trace Elements (Boron and Lead) on the

Standard Specification for Automotive Gray Iron Castings. machinability improvement in gray cast iron corresponds to the strength increase. This phase of the project included a preliminary study to ductile iron grades, some of which indicated a significant increase in strength., Offsetting Shrinkage in Ductile Iron What Thermal Analysis Shows By David Sparkman May 30, 2001 Last Revision February 11 th 2006 Abstract The natural shrinkage that occurs during the solidification of Ductile Iron can be.

and gray cast iron at the interior) 4. Grey Cast Iron (Flake Graphite) 5. Spheroidal Graphite (SG) / Ductile Cast Iron / Nodular Cast Iron (free carbon as spheroids) 6. Alloy Cast Iron Classification of Cast Irons is based on metallographic structure. (900-950oC for many days/cooling slowly) A high cooling rate and a low carbon equivalent favours the formation of white cast iron A low cooling We've compared the qualities of the most basic forms of cast iron (gray iron) and cast steel (mild or carbon steel), but the specific composition and phase structure of iron and steel can greatly affect mechanical properties. For example, the carbon in a standard gray iron takes the form of sharp graphite flakes, while ductile iron features more spheroidal graphite structures. Flaked graphite

cast iron • The cast irons are the ferrous alloys with greater that 2.14 wt. % carbon, but typically contain 3-4.5 wt. % of C as well as other alloying elements, such as A gray cast iron alloy is disclosed. The gray cast iron alloy includes carbon from about 3.05 to about 3.40 weight percent, niobium from about 0.05 to about 0.3 weight percent, and silicon from about 1.75 to about 2.3 weight percent. The gray cast iron alloy also includes nickel less than or …

1/09/2012 · The Composition Of Grey Cast Iron in terms of all its constituent elements can be explained as follows: Carbon (up to 4%): The carbon content of the grey cast iron later on gets converted to graphite after going through a series of chemical reactions. Table 1 Classification of cast iron by commercial designation, microstructure, and fracture Commercial designation Carbon-rich phase Matrix(a) Fracture Final structure after Gray iron …

The material under examination is a lamellar gray cast iron with fully pearlitic matrix of GJL 300 grade (i.e. minimum tensile ultimate strength 300 MPa) according to Ref. . Pearlite, characterized by high strength and hardness, is a product of eutectoid transformation and it is made up of alternate lamellar planes of ferrite and cementite. Table 1 Classification of cast iron by commercial designation, microstructure, and fracture Commercial designation Carbon-rich phase Matrix(a) Fracture Final structure after Gray iron …

A high-strength and wear-resistant alloyed gray iron with ausferritic microstructure on solidification directly from molten condition could be made in a Ni and Mo alloyed gray cast iron. The as-cast ausferritic cast iron was compared with two conventionally austempered gray iron with and without Ni The white cast iron, gray cast iron, and the reference steels used in this investiga- tion were prepared by a metallurgical services laboratory primarily as teaching …

machinability improvement in gray cast iron corresponds to the strength increase. This phase of the project included a preliminary study to ductile iron grades, some of which indicated a significant increase in strength. cast iron • The cast irons are the ferrous alloys with greater that 2.14 wt. % carbon, but typically contain 3-4.5 wt. % of C as well as other alloying elements, such as

Read "Influence of chemical composition and microstructure of gray cast iron on wear of heavy duty diesel engines cylinder liners, Wear" on DeepDyve, the largest online rental service for scholarly research with thousands of academic publications available at your fingertips. GREY IRON 4E Colour Code Yellow Typical Mechanical Properties Tensile Strength 220-260 MPa Hardness 170-220 BHN Stocked Sizes Available in continuous cast bar in sizes:

X1.1.1 gray iron—a cast iron in which the graphite is present as flakes instead of temper carbon nodules as in malleable iron or small spherulites as in ductile iron. 1.1 These test methods cover the chemical analysis of pig iron, gray cast iron (including alloy and austenitic), white cast iron, malleable cast iron, and ductile (nodular) iron having chemical compositions within the following limits:

cause the carbon to form as graphite flakes – Gray Cast Iron. •If we put in more Silicon and cool slowly we can get virtually all the carbon out of the austenite Mechanical properties of gray cast iron as specifi ed in the appropriate standard as data for the designengineer. Tensile strength of gray cast iron (according to DIN EN 1561 Aug. 1997) previous grade of material according to DIN 1691 grade of material according to EN 1561 defi ning wall thickness tensile strength Rm required values tensile strength Rm expected values in the casting material

Investigation of Cast Iron Processing to Produce Controlled Dual Graphite Structure in Castings S.N. Lekakh, J. Qing, V.L. Richards Missouri University of Science and Technology, Rolla, MO Iron foundries cast 3 major types of iron: gray iron, ductile iron, and malleable iron. Cast iron Cast iron is an iron-carbon-silicon alloy, containing from 2 to …

GREY IRON 4E Colour Code Yellow Typical Mechanical Properties Tensile Strength 220-260 MPa Hardness 170-220 BHN Stocked Sizes Available in continuous cast bar in sizes: base chemistry was otherwise typical of Class 35 gray iron at a carbon equivalent (CE) value of 3.9 to 4.0 and sufficient alloying with Cu and Sn to assure a fully pearlitic structure.

Furthermore, the addition of niobium transforms the microstructure of gray cast iron from cellular structure into totally dendritic structure. As a consequence, the niobium addition affected the Offsetting Shrinkage in Ductile Iron What Thermal Analysis Shows By David Sparkman May 30, 2001 Last Revision February 11 th 2006 Abstract The natural shrinkage that occurs during the solidification of Ductile Iron can be

1.1 These test methods cover the chemical analysis of pig iron, gray cast iron (including alloy and austenitic), white cast iron, malleable cast iron, and ductile (nodular) iron having chemical compositions within the following limits: grey cast iron composition.pdf. 260. Single Casting Specimen Tensile Strength Property Gray Iron Casting, no any standard mentioned the chemistry composition, so we only suggest the following

Tensile Strength The tensile strength of ductile iron begins where gray iron stops. The as-cast tensile strength of ductile iron ranges from 60,000 to 100,000 psi. A395 material, which has the greatest ductility, has a minimum tensile strength of 60,000 psi. Yield Strength The yield strength of A395 ductile iron is a minimum of 40,000 psi. This is higher than grades 70-36 and 60-30 cast steel A high-strength and wear-resistant alloyed gray iron with ausferritic microstructure on solidification directly from molten condition could be made in a Ni and Mo alloyed gray cast iron. The as-cast ausferritic cast iron was compared with two conventionally austempered gray iron with and without Ni

and gray cast iron at the interior) 4. Grey Cast Iron (Flake Graphite) 5. Spheroidal Graphite (SG) / Ductile Cast Iron / Nodular Cast Iron (free carbon as spheroids) 6. Alloy Cast Iron Classification of Cast Irons is based on metallographic structure. (900-950oC for many days/cooling slowly) A high cooling rate and a low carbon equivalent favours the formation of white cast iron A low cooling Selecting the proper grade of cast iron depends on the application. Important factors to consider include: machinability, wear and strength. Use the chart below or click on a particular grade of cast iron to learn whether it is a good fit for your application.

Thermal Conductivity – Ductile iron has a lower thermal conductivity than gray iron. Vibration Dampening - Gray iron dampens vibrations more effectively than ductile iron. Gray iron can be cast very easily and has good machineability. X1.1.1 gray iron—a cast iron in which the graphite is present as flakes instead of temper carbon nodules as in malleable iron or small spherulites as in ductile iron.

Effect of Trace Elements (Boron and Lead) on the. equivalent grey cast iron was investigated. The experimental results indicated that an increase in the niobium The experimental results indicated that an increase in the niobium content is favorable to refining the graphite and eutectic cell; and the pearlite lamellar spacing is reduced., The general composition of gray cast iron is 95% iron by weight with an additional 2.1 to 4% being carbon and 1 to 3% silicon. Manganese and other impurities are also commonly found in or added to molten iron as needed for the diminishing or enhancement of specific properties. Sulfur, for example, is commonly introduced to the molten metal in order to increase hardness, which is otherwise low.

Standard Test Methods for Chemical Analysis of Cast Iron

gray cast iron composition pdf

Grade Listing Continuous Cast Dura-Bar Iron & Bronze. Damping Properties of Selected Steels and Cast Irons By A. Visnapuu, R. W. Nash, and P ever, its composition, Co-22.5 Ni-l.8 Ti, is high in the critical metals cobalt and nickel, which must be imported, meaning that its use must be restricted to spe­ cial applications. Alternate approaches for damping com­ monly use shock absorbers, shock mounts, constrained-layer damping, and bonded-on, Mechanical properties of gray cast iron as specifi ed in the appropriate standard as data for the designengineer. Tensile strength of gray cast iron (according to DIN EN 1561 Aug. 1997) previous grade of material according to DIN 1691 grade of material according to EN 1561 defi ning wall thickness tensile strength Rm required values tensile strength Rm expected values in the casting material.

Effect of Trace Elements (Boron and Lead) on the

gray cast iron composition pdf

12.10 Gray Iron Foundries US EPA. Iron foundries cast 3 major types of iron: gray iron, ductile iron, and malleable iron. Cast iron Cast iron is an iron-carbon-silicon alloy, containing from 2 to … equivalent grey cast iron was investigated. The experimental results indicated that an increase in the niobium The experimental results indicated that an increase in the niobium content is favorable to refining the graphite and eutectic cell; and the pearlite lamellar spacing is reduced..

gray cast iron composition pdf


The white cast iron, gray cast iron, and the reference steels used in this investiga- tion were prepared by a metallurgical services laboratory primarily as teaching … The general composition of gray cast iron is 95% iron by weight with an additional 2.1 to 4% being carbon and 1 to 3% silicon. Manganese and other impurities are also commonly found in or added to molten iron as needed for the diminishing or enhancement of specific properties. Sulfur, for example, is commonly introduced to the molten metal in order to increase hardness, which is otherwise low

cause the carbon to form as graphite flakes – Gray Cast Iron. •If we put in more Silicon and cool slowly we can get virtually all the carbon out of the austenite 1 shows the chemical composition of non inoculated cast iron. Table 2 shows the number of produced specimens and type as well as quantity of added inoculants. Table 3 shows chemical composition of the inoculant used. We made four different specimens for the test. Table 1 shows the chemical composition of the base cast iron. The temperature of casting the base cast iron was 1421 °C. We …

Iron foundries cast 3 major types of iron: gray iron, ductile iron, and malleable iron. Cast iron Cast iron is an iron-carbon-silicon alloy, containing from 2 to … Selecting the proper grade of cast iron depends on the application. Important factors to consider include: machinability, wear and strength. Use the chart below or click on a particular grade of cast iron to learn whether it is a good fit for your application.

A gray cast iron alloy is disclosed. The gray cast iron alloy includes carbon from about 3.05 to about 3.40 weight percent, niobium from about 0.05 to about 0.3 weight percent, and silicon from about 1.75 to about 2.3 weight percent. The gray cast iron alloy also includes nickel less than or … Thermal Conductivity – Ductile iron has a lower thermal conductivity than gray iron. Vibration Dampening - Gray iron dampens vibrations more effectively than ductile iron. Gray iron can be cast very easily and has good machineability.

Read "Influence of chemical composition and microstructure of gray cast iron on wear of heavy duty diesel engines cylinder liners, Wear" on DeepDyve, the largest online rental service for scholarly research with thousands of academic publications available at your fingertips. Grey Cast Iron (Gray iron castings) is so called because of the colour of the fracture face. It contains 1.5-4.3% carbon and 0.3-5% silicon plus manganese, sulfur and phosphorus. It is brittle with low tensile strength, but is easy to cast.

Read "Influence of chemical composition and microstructure of gray cast iron on wear of heavy duty diesel engines cylinder liners, Wear" on DeepDyve, the largest online rental service for scholarly research with thousands of academic publications available at your fingertips. The composition of gray iron must be selected in such a way to satisfy three basic structural requirements: graphite shape and distribution, carbide-free (chill-free) structure,

The material under examination is a lamellar gray cast iron with fully pearlitic matrix of GJL 300 grade (i.e. minimum tensile ultimate strength 300 MPa) according to Ref. . Pearlite, characterized by high strength and hardness, is a product of eutectoid transformation and it is made up of alternate lamellar planes of ferrite and cementite. chemical composition before the casting process, inoculants and cooling conditions [3]. Upon small degrees of super cooling, graphite is formed when the cast iron solidifies from its liquid state. Slow cooling promotes graphite formation whereas rapid cooling partly or completely suppresses graphitization and leads to the formation of cementite or carbides [4]. The effect of high cooling rates

Grey Cast Iron (Gray iron castings) is so called because of the colour of the fracture face. It contains 1.5-4.3% carbon and 0.3-5% silicon plus manganese, sulfur and phosphorus. It is brittle with low tensile strength, but is easy to cast. Furthermore, the addition of niobium transforms the microstructure of gray cast iron from cellular structure into totally dendritic structure. As a consequence, the niobium addition affected the

machinability improvement in gray cast iron corresponds to the strength increase. This phase of the project included a preliminary study to ductile iron grades, some of which indicated a significant increase in strength. Transient thermomechanical analysis of automotive disc brake with gray cast iron composition - Volume 109 Issue 6 - A. Belhocine, M. Bouchetara Skip to main content We use cookies to distinguish you from other users and to provide you with a better experience on our websites.

The white cast iron, gray cast iron, and the reference steels used in this investiga- tion were prepared by a metallurgical services laboratory primarily as teaching … Transient thermomechanical analysis of automotive disc brake with gray cast iron composition - Volume 109 Issue 6 - A. Belhocine, M. Bouchetara Skip to main content We use cookies to distinguish you from other users and to provide you with a better experience on our websites.

Furthermore, the addition of niobium transforms the microstructure of gray cast iron from cellular structure into totally dendritic structure. As a consequence, the niobium addition affected the and gray cast iron at the interior) 4. Grey Cast Iron (Flake Graphite) 5. Spheroidal Graphite (SG) / Ductile Cast Iron / Nodular Cast Iron (free carbon as spheroids) 6. Alloy Cast Iron Classification of Cast Irons is based on metallographic structure. (900-950oC for many days/cooling slowly) A high cooling rate and a low carbon equivalent favours the formation of white cast iron A low cooling

GREY IRON 4E Colour Code Yellow Typical Mechanical Properties Tensile Strength 220-260 MPa Hardness 170-220 BHN Stocked Sizes Available in continuous cast bar in sizes: Iron foundries cast 3 major types of iron: gray iron, ductile iron, and malleable iron. Cast iron Cast iron is an iron-carbon-silicon alloy, containing from 2 to …

X1.1.1 gray iron—a cast iron in which the graphite is present as flakes instead of temper carbon nodules as in malleable iron or small spherulites as in ductile iron. machinability improvement in gray cast iron corresponds to the strength increase. This phase of the project included a preliminary study to ductile iron grades, some of which indicated a significant increase in strength.

Cast iron composition When carbon is added to iron, the result is a chemical compound called iron carbide (Fe 3C). Iron without carbon forms a body-centered crystal struc- ture called ferrite. Alternating plates of iron carbide and ferrite make up pearlite; as more carbon is added, a higher percentage of pearlite is formed in the matrix (Fig. 1). Pearlite forms in both steel and cast irons. As Silicon contents of less than 3.5% increase the rate of growth of gray cast iron by promoting graphitisation. However, silicon contents of 4% to 8% greatly reduce both oxidation (scaling) and growth.

Tensile Strength The tensile strength of ductile iron begins where gray iron stops. The as-cast tensile strength of ductile iron ranges from 60,000 to 100,000 psi. A395 material, which has the greatest ductility, has a minimum tensile strength of 60,000 psi. Yield Strength The yield strength of A395 ductile iron is a minimum of 40,000 psi. This is higher than grades 70-36 and 60-30 cast steel Mechanical properties of gray cast iron as specifi ed in the appropriate standard as data for the designengineer. Tensile strength of gray cast iron (according to DIN EN 1561 Aug. 1997) previous grade of material according to DIN 1691 grade of material according to EN 1561 defi ning wall thickness tensile strength Rm required values tensile strength Rm expected values in the casting material

grey cast iron composition.pdf. 260. Single Casting Specimen Tensile Strength Property Gray Iron Casting, no any standard mentioned the chemistry composition, so we only suggest the following Hypoeutectic gray cast iron of composition Fe–2.6 wt%C–1.5 wt%Si, specifically developed as a thixoformable raw material, was prepared via conventional casting in sand molds.

J. O. OLAWALE . ET AL. 45. water, cast iron and low alloyed steel. The chemical composition of cocoa liquor was evaluated by chemical analysis and the result is as presented in cause the carbon to form as graphite flakes – Gray Cast Iron. •If we put in more Silicon and cool slowly we can get virtually all the carbon out of the austenite

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