Is it better to have a high or less carbon equivalent in cast iron

This can't be said to be good or bad, it depends on demand.

If the carbon content is higher than that, it is called cast iron, and if it is lower than it, it is called steel. Generally, the steel with a higher carbon content is called high-carbon steel, the steel with a carbon content between is called medium-carbon steel, the steel with a carbon content of less than is called low-carbon steel, and the steel with a carbon content of less than is called industrial pure iron. Carbon plays an important role in the properties of steel.

With the increase of carbon content, the hardness and strength of steel are improved, and its toughness and plasticity decrease; Conversely, if the carbon content decreases, the hardness and strength decrease, while the toughness and plasticity increase.

Due to the different casting structures or casting processes, the carbon equivalent is uncertain, and the specific problems need to be analyzed on a case-by-case basis. If the fluidity of the casting is considered, the high carbon equivalent is taken for anti-shrinkage porosity, and the low carbon equivalent is taken for anti-graphite floating of ductile iron.

1. Differences:

Mild steel. The toughness is stronger than that of travertine cast iron, and cast iron is more brittle than mild steel. Yield strength of mild steel.

Higher than cast iron. (Cast iron is brittle, yield strength is almost non-existent), but the tensile strength of cast iron.

Greater than mild steel because cast iron has a higher carbon content than mild steel. Impact strength mild steel is significantly better than cast iron.

2. Similarities:

It is still an elastic deformation, but the stress is not proportional to the deformation of the specimen.

Relationship. When the stress reaches the yield limit, the displacement of the specimen increases, but the stress hardly changes. The specimen undergoes obvious and uniform plastic deformation, and if the deformation of the specimen increases, the stress value must be increased.

The fundamental difference between cast iron and carbon steel is the carbon content. The carbon content is above the boundary of some to iron, and the following is steel. However, in practical application, generally the carbon content is less than that is called wrought iron or pure iron, and the content is called steel. Cast iron and carbon steel are both iron-carbon alloys.

Cast iron has a high carbon content, with a carbon content of more than 2%, and the carbon content of industrial cast iron is generally . Carbon steel has a low carbon content. Carbon steel has low strength, hardness, good plasticity and toughness.

Cast iron has great properties depending on the category, some are brittle and have little use value (e.g., white cast iron), and some have good properties similar to quenched and tempered steel (e.g., ductile iron).

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The pro-cast iron is good, the cast iron has high carbon content, poor plasticity, uneven structure, and poor weldability; Cast iron is the raw material for steelmaking, and the steel system is re-smelted from pig iron, which has high mechanical strength and toughness, and also has special properties such as heat resistance, corrosion resistance, and wear resistance; Cast iron has lower tensile strength, plasticity, and toughness than carbon steel. Although the mechanical properties of cast iron are not as good as steel, due to the presence of graphite, it gives cast iron many properties that steel cannot match. Such as good wear resistance, high vibration reduction, low notch sensitivity and excellent machining properties.

The melting point of cast iron is low, about 1200, the molten iron has good fluidity, due to the volume expansion of graphite crystallization, so the transmission shrinkage rate is small, and its casting performance is better than that of steel, so it is known that the casting method is often used to make castings; To add the scope of use of common steels: tungsten steel, manganese steel is very hard, can be made into metal processing tools, tractor tracks and axles, etc.; Manganese-silicon steel has particularly strong toughness and can be used to manufacture spring sheets and coils; Molybdenum steel can resist high temperatures, and can be used to make crankshafts of aircraft, particularly hard tools, etc.; Tungsten chromium steel has high hardness and toughness, and can be used as machine tool tools and molds; Nickel-chromium steel has strong corrosion resistance and is not easy to oxidize, also known as stainless steel, which can be used to manufacture acid-resistant towers for chemical production, medical equipment, daily utensils, etc. Hope mine can help you <>

Do you have any other questions?

Iron and carbon steel are both iron-carbon alloys. The fundamental difference between cast iron and carbon steel is the carbon content. The carbon content is in the match 2

More than 08% (some are demarcated) is iron, and the following is steel. However, in the practical application of Peitanchang, the carbon content is generally less than 003% is called wrought iron or pure iron, and the content is 0

It's called steel. Steel is divided into low carbon steel according to carbon content (C; Medium carbon steel (c; High carbon steel (c>0 60%)。

Generally, medium and low carbon steel is structural steel, while high carbon steel is mostly tool steel. The composition of commonly used cast iron is different from steel, and the carbon content of cast iron is greater than 2% (commonly used 2.).5 4% c), its impurities are much greater than steel.

There is graphite in the structure of cast iron, and the strength of graphite is close to zero, so the existence of graphite is equivalent to the existence of cracks or cavities on the matrix of steel, so that the performance of cast iron is lower than that of steel, especially the tensile strength and plasticity are low, and can not be forged, but its hardness and compressive strength are better, so cast iron is mainly used for parts that bear pressure.

First, the nature is different.

1. Mild steel is carbon steel with lower carbon content, which is also known as mild steel because of its low strength, low hardness and softness.

2. A general term for cast iron alloys mainly composed of iron, carbon and silicon.

Second, the application is different.

1. Low carbon steel generally refers to steel with a carbon content in between. This type of steel has low hardness and good plasticity, which is convenient for cold plastic deformation molding process, welding and cutting, and is often used in the manufacture of chains, rivets, bolts, shafts, etc.

2. Cast iron: due to the long annealing cycle, complex process and high cost, it is only suitable for mass production of thin-walled parts.

The difference in composition: the carbon content of mild steel is less than or equal to; Cast iron has a greater carbon content than that.

The difference in performance: low carbon steel has low strength and hardness, good plasticity and toughness; Cast iron has great properties depending on the category, some are brittle and have little use value (e.g., white cast iron), and some have good properties similar to quenched and tempered steel (e.g., ductile iron).

, compare the difference between the tensile fractures of the two specimens of low carbon steel and cast iron, and roughly judge their plasticity. Answer: The low carbon steel fracture has a bright inclined surface produced by obvious plastic failure, and the inclination angle of the inclined surface is approximately the axis of the sample (called a cup-shaped fracture).

Summary. Cast iron has a carbon content of 2% to 4%. Carbon is mostly found in graphite form in cast iron, and sometimes in cementite form.

In addition to carbon, cast iron also contains 1% 3% silicon, as well as elements such as manganese, phosphorus, and sulfur. Corrosion-resistant cast iron also contains elements such as nickel, chromium, molybdenum, aluminum, copper, boron, vanadium, etc. Carbon and silicon are the main elements that affect the microstructure and properties of cast iron.

Cast iron is classified according to the form of carbon existence, which can be divided into gray cast iron, white cast iron, and hemp cast iron.

Cast iron has a carbon content of 2% and a width of 4%. Carbon is mostly found in graphite form in cast iron, and sometimes in cementite form. In addition to carbon, wild cast iron also contains 1% 3% silicon, as well as elements such as manganese, phosphorus, and sulfur.

Corrosion-resistant cast iron also contains nickel, chromium, molybdenum, aluminum, copper, boron, vanadium and other elements. Carbon and silicon are the main elements that affect the microstructure and properties of cast iron. Cast iron is classified according to the form of carbon existence, which can be divided into gray cast iron, white cast iron, and hemp cast iron.

Can you elaborate on that a little bit more?

Cast iron has a carbon content of 2% and a width of 4%. Carbon is mostly found in graphite form in cast iron, and sometimes in cementite form. In addition to carbon, wild cast iron also contains 1% 3% silicon, as well as elements such as manganese, phosphorus, and sulfur.

Corrosion-resistant cast iron also contains nickel, chromium, molybdenum, aluminum, copper, boron, vanadium and other elements. Carbon and silicon are the main elements that affect the microstructure and properties of cast iron. Cast iron is classified according to the form of carbon existence, which can be divided into gray cast iron, white cast iron, and hemp cast iron.