What is modulus of elasticity for cast iron?
Cast Iron
| Material | Modulus of elasticity | |
|---|---|---|
| GPa | 106 psi | |
| Cast irons | ||
| Gray iron, grade G1800: | 66-97 | 9.6-14 |
| Gray iron, grade G4000: | 110-138 | 16-20 |
What affects the mechanical properties of graphite cast iron?
The size, distribution, and shape of the incorporated graphite particles in gray cast iron significantly affect the mechanical properties of product.
What is the form graphite structure in ductile cast iron?
In ductile irons, graphite is in the form of nodules rather than flakes as in grey iron. Whereas sharp graphite flakes create stress concentration points within the metal matrix, rounded nodules inhibit the creation of cracks, thus providing the enhanced ductility that gives the alloy its name.
What are the properties 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 factors control the structure of cast iron?
The final structure and properties of austempered ductile iron are dependent on the following metallurgical factors: – microstructure of initial nodular cast iron; – basic chemical composition; – austenitization temperature and holding time at this temperature; – cooling rate to the temperature of isothermal …
Which factors affect the properties of a gray cast iron?
Castability. Successful production of a gray iron casting depends on the fluidity of the molten metal and on the cooling rate (which is influenced by the minimum section thickness and on section thickness variations). Casting design is often described in terms of section sensitivity.
How is spheroidal graphite iron made?
Cast iron and cast steel The formation of nodules or spheroids occurs when eutectic graphite separates from the molten iron during solidification. The separation of graphite in nodular form is similar to separation of graphite in gray cast iron except that the additives facilitate the graphite to take nodular shape.
How is compacted graphite iron made?
Similar to ductile iron, compacted graphite iron is produced by adding magnesium to a desulfurized base iron. As shown in Figure 3, CGI is stable over a range of approximately 0.008% magnesium (Mg), which is approximately five times smaller than the commercially used Mg-range for ductile iron.
What is graphite in grey cast iron?
In grey cast iron, most of the carbon is present in the form of graphite flakes, which make the material softer, more machinable and less brittle than white cast iron. As the name suggests, cast iron is very fluid when molten and is therefore suitable for the manufacture of intricate castings.
How do you calculate Young’s modulus of elasticity?
Young’s modulus equation is E = tensile stress/tensile strain = (FL) / (A * change in L), where F is the applied force, L is the initial length, A is the square area, and E is Young’s modulus in Pascals (Pa). Using a graph, you can determine whether a material shows elasticity.