Where Does Cast Iron Malleable Come from?

Posted on May 13, 2021

Cast Iron Malleable

To make malleable cast iron, workers in the foundry added hematite during the annealing process. According to the ductility requirement, they can also be mixed with sodium, cerium, or magnesium. Cast iron is usually smelted in a large pot. Usually, for other types of ironmaking, the furnace becomes too hot, this is when the iron absorbs the most carbon. Then pour it into a mold to cool.

Although both contain iron, there is a big difference between malleable cast iron and cast iron. The main difference is that malleable cast iron is not malleable iron. Still, there are some other differences in the iron casting process and more. We will discuss what these metals are and how they are made.
 

What Is Cast Iron?

Cast iron is the result of smelting ore in a furnace and produces high carbon content. The alloy is then added to the iron, then the iron is poured into the mold and cooled.
 

What Is Malleable Iron?

Malleable cast iron was originally cast iron, but cast iron was annealed and heat-treated to make it easier to work and increase ductility. Therefore, the carbon content of malleable cast iron is much lower than that of cast iron. There are three different types of malleable cast iron:
 

  • Black Heart
  • White Heart
  • Pearlite


:: Read More: Have You Heard of White Cast Iron?
 

Production of Cast Iron Malleable

To make malleable cast iron, workers in the foundry added hematite during the annealing process. According to the ductility requirement, they can also be mixed with sodium, cerium, or magnesium. Cast iron is usually smelted in a large pot. Usually, for other types of ironmaking, the furnace becomes too hot, this is when the iron absorbs the most carbon. Then pour it into a mold to cool.
 

Attributes

Malleable cast iron is easier to machine for more complex designs, such as luxury cast iron doors. On the other hand, cast iron is known for its castability, which means that cast iron has a low melting point and can be easily poured into molds without premature cooling.
 

Composition of Cast Iron Malleable

The annealing process of malleable iron causes it to form small carbon particles with irregular shapes. This allows the iron to have greater strength while maintaining ductility. Malleable cast iron is easy to machine and impact resistant. Cast iron contains about 2% carbon, which makes it stronger and more resistant to rust. But it also makes the process more difficult, because it is difficult to get smooth surface material. This will also make the processing cost of cast iron higher because it will shorten tool life.
 

Cost

The prices of cast iron and malleable cast iron are similar. However, cast iron tends to be cheaper because it has a low melting point and requires less energy for heating.
 

Features of Cast Iron Malleable

Cast iron is used to make castings, such as barbell counterweights in gyms or engine blocks. Malleable cast iron is more suitable for decorative elements such as iron doors.

Like cast iron, malleable cast iron is produced by casting methods, but they are actually quite different from each other. Although the malleable cast iron fittings were originally cast iron fittings, they are transformed into more durable malleable cast iron through a heating process.

In the following section, we will introduce the various materials under the cast iron umbrella and will explain what makes malleable cast iron different and which application is best for each material.
 

Cast Iron

Due to its extremely high brittleness, do not use cast iron fittings in plumbing applications. Understanding the difference is the key to ensuring that you choose the right material for your application. Below, we have materials belonging to cast iron, gray, white, plasticity, and toughness.
 

Grey Cast Iron

Gray cast iron is not a material used to make cast iron or malleable parts. Gray cast iron is named WS40 (top)-1 due to the gray appearance of the material's fracture. Gray cast iron is the most commonly used cast iron, and due to its weight, it is also the most widely used WTCC-6-CI material. The strength of gray cast iron is comparable to low-carbon or medium-carbon steel, but its tensile strength and impact resistance is lower than steel. Common items made of gray cast iron are manhole covers and seals.
 

White Cast Iron

White cast iron is used for cast iron and malleable cast iron fittings. The cement present in white cast iron gives off a white surface, hence the name. White cast iron is too brittle for many structural applications, but due to its good hardness and wear resistance, it can be used in many applications, including the teeth of backhoe excavating buckets and the lifting rods of ball mills. The cost of this material is also relatively low.
 

Cast Iron Malleable Properties

The fragile iron of 2-BLB-1512 started out as cast white iron but was subsequently processed at 900°C about 1,650°F. Malleable cast iron contains a more blunt boundary as opposed to the flakes, which eliminates the stress concentration problems that may be caused by gray cast iron. The properties of malleable iron are very similar to those of mild steel.
 

Nodular Cast Iron DI Spool-1

Ductile iron is a recent development. A small amount of magnesium is in the content. Nodular cast iron is very similar to malleable cast iron, There are certain restrictions on how large parts can be cast. Blue electrostatic epoxy paint is added to bottomless valve cores, hole seals, and hole covers to improve corrosion resistance.
 

Class vs Pound

In 1973, the friction word was changed from pound to class. We no longer refer to malleable parts as 150 pounds, and the appropriate term is called class 150. It is important to remember that the pressure rating of the accessory depends on the temperature of the material. Generally, the category of the accessory is the maximum pressure at the highest temperature.

Each material has its most effective application and knowing all the information ensures that the correct material is used. Malleable cast iron has become a popular material in the plumbing industry, and knowing the source of this material can ensure that it is used correctly in the intended use.
 

IMTS Exhibition

IMTS gathered worldwide Iron Casting manufacturers into this online platform. Browse and search for your next supplier with us.

Should you run into any difficulties, please do not hesitate to contact us.

Quick Link to Suppliers

0Inquiry Item Contact IMTS