What are the material properties of cast iron?
A few common mechanical properties for cast iron include:
- Hardness – material’s resistance to abrasion and indentation.
- Toughness – material’s ability to absorb energy.
- Ductility – material’s ability to deform without fracture.
- Elasticity – material’s ability to return to its original dimensions after it has been deformed.
Is SG iron magnetic?
Austenitic ductile iron – Alloyed to produce an austenitic matrix, this ductile iron offers good corrosion and oxidation resistance, good magnetic properties, and good strength and dimensional stability at elevated temperatures.
What are the properties of ductile cast iron?
Ductile iron is distinguished from ordinary grey iron by its remarkable mechanical properties (elasticity, impact strength, elongation…). These are due to the spheroidal nature of the graphite particles….Ductile iron properties
- tensile strength,
- impact resistance,
- high elastic limit,
- good elongation.
Which factor controls the mechanical properties of ductile cast iron?
The main factors that influence the structure of ductile iron are chemical composition, cooling rate, liquid treatment, and heat treatment (Ref 1-4). The cooling rate of a casting is primarily a function of its section size, pouring temperature, and the material mold ability to absorb the heat.
What are the advantages and disadvantages of cast iron?
Disadvantages of cast iron
- It is Prone to rusting.
- It has poor tensile strength.
- Its parts are section sensitive, this is due to slow cooling of thick sections.
- failure of Its parts is sudden and total, it does not exhibit yield point.
- It has poor impact resistance.
- Compared to steel it has poor machinability.
What is cast iron and its classification?
Cast iron is an iron alloy containing 2 wt. % – 4 wt. Depending on the silicon content of the cast iron, it is classified as either white cast iron or grey cast iron and may be treated further under particular temperatures to produce malleable or ductile cast iron.
Why is SG Iron used?
SG Iron has long been used to transport water and other liquids. Its remarkable strength to weight ratio, alongside its toughness makes SG Iron a suitable material to withstand the high operating pressures faced by pressure pipes and fittings.
What are the factors affecting microstructure 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 …
Why is ductile iron better than cast iron?
Ductile iron has excellent corrosion resistance, tensile strength, and yield strength. Unlike cast iron, ductile iron does not break when it is bent, so it is more suited for high demand applications. Ductile iron is typically more expensive than cast iron due to its more complicated chemical makeup.
What is a disadvantage of cast iron?
Disadvantages of cast iron cookware Cast iron is heavier than other cookware. Bare cast iron is not the best for boiling water and cooking acidic foods. Cast iron cookware will need re-seasoning. Cast iron pans take longer to heat up.
What is the structure of SG cast iron?
The main characteristic of this material is the structure of the graphite. In SG Cast Iron the graphite is in the form of spherical nodules (hence the name Spheroidal Graphite) rather than flakes as in Grey Iron.
What kind of plasticity does cast iron have?
The cast iron plasticity material model is intended for modeling cast iron and other materials like cast iron for which the behavior in uniaxial tension and uniaxial compression matches the behavior shown in Figure 1 .
How is ductility achieved in SG cast iron?
The considerable amount of ductility achieved in SG cast iron is due to the spherical form of graphite rather than flakes as present in grey cast iron which eliminates the stress concentration effect when subjected to different loading conditions and for which it is preferred in automotive parts manufacturing.
What do you need to know about SG iron?
SG Iron is a type of cast iron that has been treated while molten with an element such as magnesium or cerium to induce the formation of free graphite as nodules or spherulites. The followings are the grade requirement to the chemical components and physical properties, and also grade comparison chart.