What are the properties and applications of grey cast iron?
Gray cast iron characterized by flake graphite has certain strength, hardness, modulus of elasticity, shock absorption, wear resistance and thermal conductivity, especially with excellent casting performance, good cutting performance and low casting cost. So far, it is still the most widely used cast iron in the world.
What are the mechanical properties of grey cast iron?
| Physical Properties | Metric | English |
|---|---|---|
| Tensile Strength, Ultimate | 115 – 700 MPa | 16700 – 102000 psi |
| Tensile Strength, Yield | 65.5 – 420 MPa | 9500 – 60900 psi |
| Elongation at Break | 1.00 – 15.0 % | 1.00 – 15.0 % |
| Modulus of Elasticity | 62.1 – 162 GPa | 9000 – 23500 ksi |
Why is cast iron used for many applications?
With its relatively low melting point, good fluidity, castability, excellent machinability, resistance to deformation and wear resistance, cast irons have become an engineering material with a wide range of applications and are used in pipes, machines and automotive industry parts, such as cylinder heads, cylinder …
What is gray iron used for?
It is used for housings where the stiffness of the component is more important than its tensile strength, such as internal combustion engine cylinder blocks, pump housings, valve bodies, electrical boxes, and decorative castings.
What is a gray iron casting?
Grey iron castings, also known as gray iron castings, are iron-carbon alloyed parts produced in foundries, not to be confused with forges. Inside foundries, gray iron material is cast and formed via closed mold operations for applications in a wide range of industries.
Why is cast iron used in machinery?
High-carbon content and silicon in cast irons give them excellent castability. Their melting temperatures are appreciably lower than those of steel. Molten iron is more fluid than molten steel and less reactive with molding materials.
Why is GREY cast iron widely used for machines?
Gray Cast Iron has extremely high damping capacity, and is therefore the preferred material for machine tool beds, tables, columns, etc. (as also engine cylinder blocks, for the same reason). You can see its damping capacity compared to other materials in the graph below.
Why is GREY cast iron widely used for machine tools?
Gray cast irons are frequently used in machine tool beds due to low cost, high vibration damping capacity, and easiness of manufacturing. The guiding standards for production of these alloys determine their classes based on the range of tensile strength and shape of graphites.
What is the advantage and disadvantage of cast iron?
Cast iron cookware is long-lasting, stays hot, is naturally non-stick, affordable, and retains heat longer than any other cookware. However, not all foods can be cooked with cast iron, it’s heavy, and the cookware does require maintenance, known as seasoning. Failure to properly care for cast iron leads to rust.
Why is cast iron used for machine tools?
Machine tools are built based on cast-iron bodies. Cast iron well dumps down vibrations and is dimensionally stable. Therefore, many conventional machine tools are modernized and modified into CNC machine tools based on the seasoned old bodies of those machine tools.
What are the different types of cast irons What are their applications?
The 4 Types of Cast Iron
- #1) Gray Cast Iron. The most common type, gray cast iron features a graphite microstructure consisting of many small fractures.
- #2) White Cast Iron. While not as common as gray cast iron, white cast iron is another type worth mentioning.
- #3) Ductile Cast Iron.
- #4) Malleable Cast Iron.
Why is grey cast iron widely used for machines?
What is grey cast iron made of?
Gray cast iron Gray cast iron is a broad term used for a number of cast irons whose microstructure is characterized by the presence of flake graphite in the ferrous matrix. Such castings often contain 2.5%–4% carbon, 1%–3% silicon, and some additions of manganese ranging from 0.1% to 1.2%. This is one of the most widely used alloys of iron.
What is the tensile strength of grey cast iron?
Under this system, grey cast irons are graded according to their tensile strength, with class 20 grey cast iron, for example, having a minimum tensile strength of 20,000 psi (140 MPa). White cast iron has a white fracture colour due to the presence of iron carbide, or cementite Fe3C.
What are the characteristics of gray iron?
Gray cast iron characterized by flake graphite has certain strength, hardness, modulus of elasticity, shock absorption, wear resistance and thermal conductivity, especially with excellent casting performance, good cutting performance and low casting cost. So far, it is still the most widely used cast iron in the world.
What are the types of cast iron and their applications?
Types of cast iron and their applications 1 Grey cast iron. Grey cast iron, or gray iron, has a dark grey fracture colour due to a graphitic microstructure. 2 White cast iron. White cast iron has a white fracture colour due to the presence of iron carbide, or cementite Fe3C. 3 Malleable cast iron. 4 Ductile cast iron.