What is the chemical composition of grey cast iron?
This material is a ternary Fe-C-Si alloy. Grey cast iron is characterized by its graphitic microstructure. Most cast irons have a chemical composition of 2.5 to 4.0% carbon, 1 to 3% silicon, and the remainder is iron.
What is the reason of lot of grey cast iron?
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. It is the most common cast iron and the most widely used cast material based on weight.
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.
How do you identify grey cast iron?
Gray cast iron is characterized by its flaky appearance and a gray color created by the graphite inside of its make-up. Gray cast iron’s properties will change depending on what materials are combined when they’re melted together.
What are the chemical properties of cast iron?
Most cast irons have a chemical composition of 2.5–4.0% carbon, 1–3% silicon, and the remainder iron. Grey cast iron has less tensile strength and shock resistance than steel, but its compressive strength is comparable to low- and medium-carbon steel.
What is the percentage of grey cast iron?
The presence of graphite gives a grey shade to the fractured surface of cast iron. Therefore, when all the carbon in cast irons is in the form of graphite, it is called Grey cast Iron. Grey cast iron with a carbon content of 2.4% – 3.8%.
What reduces ductility of a grey cast iron?
Gray cast iron contains graphite flakes, which are responsible for the reduced ductility and strength.
Why grey cast iron is brittle and weak in tension?
Gray cast irons are comparatively weak and brittle in tension due to its microstructure; the graphite flakes have tips which serve as points of stress concentration. Strength and ductility are much higher under compression loads.
Why gray iron is brittle and weak in tension?
How do you test cast iron?
Spark Test: One of the easier methods to check cast iron vs cast steel is by spark test. The specimen can be grinded using an abrasive wheel and looking at the spark pattern and spark color, an experienced person can inform if the material is Cast iron or cast steel.
What are the 3 types of iron?
Iron can exist in several forms according to their percentage purity, intended use or carbon content. There are basically three types of iron and they are:- Pig iron, Cast iron and wrought iron. We shall describe these types of iron and give their uses in industrial and manufacturing processes.
What is the permeability of cast iron?
|Magnetic Properties of Grey Cast Iron|
|Code of Grey Iron||Chemical Composition (%)|
|Max. Magnetic Permeability / μH•m-1||396|
|Magnetic Field Strength when Max. Magnetic Permeability / A•m-1||637|
|Resistivity / μΩ•m||0.73|