What is the chemical composition of GREY cast iron?
Grey Cast Iron (Gray iron) is so called because of the colour of the fracture face. It contains 1.5-4.3% carbon and 0.3-5% silicon plus manganese, sulphur and phosphorus. It is brittle with low tensile strength, but is easy to cast.
What causes GREY cast iron?
Grey cast iron (a.k.a. gray iron castings) is a type of iron found in castings known for its grey color and appearance caused by graphite fractures in the material. These flakes cause fractures and cause the material to have a grey appearance.
What is meant by GREY cast iron?
Gray cast iron is a type of iron with carbon content greater than 2% and a graphitic microstructure. It is one of the most common types of cast iron used in applications. it is relatively inexpensive, malleable and durable.
Is GREY cast iron conductive?
The thermal conductivity of gray cast iron – ASTM A48 is 53 W/(m.K). Melting point is around 1260°C.
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.
What is the thermal conductivity of stainless steel?
Stainless steel exhibits a low thermal conductivity of 15 W/(mK), which allows it to retain more energy that stabilizes the surrounding temperature better than other types of steel.
What is the strongest cast iron?
Gray iron is also easier to machine than other cast irons, and its wear resistance properties make it one of the highest volume cast iron products.
What is the chemical composition of grey cast iron?
Grey Cast Iron Property and Chemical Composition. Grey Cast Iron (Gray iron castings) is so called because of the color of the fracture face. It contains 1.5-4.3% carbon and 0.3-5% silicon plus manganese, sulfur and phosphorus. It is brittle with low tensile strength, but is easy to cast.
What is the chemistry range for gray iron?
Gray iron class 30 is one grade in a family of many. Chemistry ranges are not specified in the ASTM A48 standard. Instead, chemistry and hardness values listed in this data sheet would be typical for a class 30. Read: If you’re interested in comparing gray iron and ductile iron read “ Ductile Iron Versus Gray Iron Castings.
What kind of material is gray iron used for?
Gray iron. It is the most common cast iron and the most widely used cast material based on weight. 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 are the properties of Class 40 gray iron?
Class 40 Gray Iron Chemical Composition. V-2 (Class 40) gray iron features a tensile strength of 40,000 psi with a compression strength of 150,000 psi. Class 40 gray iron’s hardness ranges from 187 to 269 bhn. The microstructure is essentially pearlitic.