Which factor controls the mechanical properties of ductile cast iron?

The mechanical properties of ferritic/pearlitic Ductile Irons are, therefore, determined by the ratio of ferrite to pearlite in the matrix. This ratio is controlled in the as-cast condition by controlling the composition of the iron, taking into account the cooling rate of the casting.

What are the mechanical 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 cast iron and ductile iron the same?

Technically, “cast iron” suggests iron alloys that are cast in a foundry. Ductile iron is one such alloy. However, ductile is a relative newcomer on the scene, with unique mechanical properties that set it apart from the other iron alloys.

Can ductile cast iron be machined?

The high amount of silicon in the ductile iron decreases the toughness of the ferrite (the metal matrix component). The graphite spheres give ductile iron its free-machining properties due to lubrication by the graphite.

What are the properties of ductile cast iron?

Ductile iron—also referred to as spheroidal or nodular iron—is actually a group of irons that exhibit high strength, flexibility, durability, and elasticity due to their unique microstructure. Cast ductile iron normally contains over 3 percent carbon; it can be bent, twisted, or deformed without fracturing.

Is ductile cast 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 disadvantages of cast iron?

Cast Iron Cons

• Prone to Rusting – Being composed primarily of iron, the material is prone to rust and eventually it will get harmed by continued rusting. Frequent contact with moisture will only speed up the process but the damage is inevitable.
• Heavy – Cast iron is heavy and it can make working with it a bit difficult.

What are the advantages of ductile cast iron?

Advantages of Ductile Iron It has an excellent strength to weight ratio. Ductile iron can be made for a much lower cost than steel. It has superior castability and machinability. Ductile iron provides a designer with an exceptional combination of toughness, low cost manufacturing, and reliability.

Do cast iron pans cause health problems?

Safety of Common Cookware Aluminum, cast iron, and stainless steel are great choices for cookware and cooking utensils. Although all metals may release into food, the amount is minimal, and these three options have little to no negative health effects associated.

Are cast iron frying pans healthy?

Cast iron isn’t all about frying True, a cast-iron skillet is an excellent vehicle for frying. But its ability to retain heat also lends itself to healthy cooking, says Kerri-Ann Jennings, a Vermont-based registered dietitian and nutrition coach.

What is the difference between ductile iron and malleable iron?

By contrast, malleable iron elongates by only 10 percent. Ductile iron has a higher “yield strength” than malleable iron, meaning it can bear greater loads and higher temperatures. However, according to the Kirkpatrick foundry, malleable iron is the best choice when you want to cast thin sections or plates.

What are the mechanical properties of iron?

Here are a few common mechanical properties of cast iron: This is the ability of a material to withstand an external pulling force. It is thus the maximum stress reached during a tension test. Tensile strength is important in the use of brittle materials (cast iron) more than ductile materials (ductile cast iron).

What does ductile iron mean?

Ductile Iron. Definition – What does Ductile Iron mean? Ductile iron refers to a type of carbon-iron alloy that is easily molten and cast into any desired shape due to its 2% carbon content. Ductile iron has a higher tendency to develop iron corrosion on its surface but has greater elongation ductility.

What is the strength of ductile iron pipe?

Ductile’s high degree of dependability is primarily due to its high strength, durability, and impact and corrosion resistance. Ductile Iron has minimum strength requirements of 60,000 psi tensile strength, 42,000 psi yield strength, and 10 percent minimum elongation.