What is grade 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 is the chemical composition of cast iron?
cast iron, an alloy of iron that contains 2 to 4 percent carbon, along with varying amounts of silicon and manganese and traces of impurities such as sulfur and phosphorus. It is made by reducing iron ore in a blast furnace.
What is the difference between gray and ductile iron?
Gray irons are generally considered lower to moderate strength, with tensile ranges from 20,000 psi to 60,000 psi. Gray irons have better damping capacity and machinability. Ductile irons have moderate machinability and higher strength with tensile ranges from 60,000 psi to over 150,000 psi.
How is gray iron made?
A high cooling rate and a low carbon equivalent favours the formation of white cast iron whereas a low cooling rate or a high carbon equivalent promotes grey cast iron. During solidification, the major proportion of the carbon precipitates in the form of graphite or cementite.
What is the difference between cast iron and grey iron?
The difference is that white cast iron features cementite below its surface, whereas gray cast iron features graphite below its surface. The graphite creates the appearance of a gray color, while the cementite creates the appearance of a white color.
What is the composition of cast?
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.
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 is difference between cast iron and grey cast iron?
Does grey cast iron rust?
Gray cast iron and malleable iron are resistant to atmospheric corrosion. They show a higher resistance than low alloy high strength steels.
What is the carbon percentage in cast iron?
Cast iron is an alloy with a high carbon content (at least 1.7% and usually 3.0–3.7%), making it relatively resistant to corrosion.
What is the difference between cast iron and grey cast iron?
Which is harder grey cast iron or white cast iron?
Hardness and Strength White cast iron is harder than grey, to the point that it is quite brittle. Grey iron, by contrast, is softer but stronger. The two types are sometimes combined, allowing a piece to be made with a hard outer coating of white iron and a strong core of grey.