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Home > Industry Information > What are the differences between carbon steel and stainless steel?

What are the differences between carbon steel and stainless steel?

2021-04-25

Carbon steel is the earliest and most used basic material in modern industry. In various industrial countries around the world, while trying to increase the output of low-alloy high-strength and alloy steels, they are also paying great attention to improving the quality of carbon steels and expanding the variety and scope of use. At present, the proportion of carbon steel production in the total steel output of countries is about 80%. It is not only widely used in construction, bridges, railways, vehicles, ships and various machinery manufacturing industries, but also in the modern petrochemical industry. The marine development and other aspects have also been used extensively. What is carbon steel? What are the classifications of carbon steel ? In fact, the use of carbon steel is in many places, but you do not know it. I will classify carbon steel according to different conditions. I hope to help you understand carbon steel.

Carbon Steel Introduction

Containing less than 1.35% of carbon, except iron, carbon and silicon, manganese, phosphorus, sulfur and other impurities within the limit, the steel does not contain other alloying elements. Carbon steel performance depends mainly on carbon content. As the carbon content increases, the strength and hardness of the steel increase, and the plasticity, toughness, and weldability decrease. Compared with other steels, carbon steel was used earliest, with low cost, wide performance range and maximum usage.

Carbon Steel Classification

If it is to be divided according to purpose, carbon steel can be divided into three categories: carbon structural steel, carbon tool steel, and free-cutting structural steel. In these three categories, carbon structural steels are divided into two categories. One is engineering construction steel and the other is machine construction structural steel.

Take the ordinary carbon structural steel, its price is relatively low, the process performance is relatively good, generally people will use to make some machine parts, such as bolts, rebar and the like ordinary parts.

If it is a high-quality carbon structural steel, then you can use it to make some important parts. The production of such parts is basically through heat treatment, such as the housing of automobiles and meters. This type of carbon structural steel has good plasticity and low strength.

Carbon tool steel, the biggest feature of this carbon steel is that strength, hardness and wear resistance must be higher than many, usually we are used to make some knives and the like. Because these complex shapes are generally made, the mechanical requirements are relatively high. Carbon tool steel meets these requirements.

If you want to divide according to the smelting method, you can divide it into open hearth steel and converter steel.

If divided by deoxidation method, there are boiling steel, killed steel, semi-static steel and special killed steel.

If the carbon content can be divided into low carbon steel, medium carbon steel and high carbon steel.

If the quality of steel can be divided into ordinary carbon steel, high-quality carbon steel, and high-quality steel and high-quality steel.

  

Carbon steel density

Low carbon steel (carbon 0.1%) 7.85 g/cm3

Medium carbon steel (containing 0.4% carbon) 7.82 g/cm3

High carbon steel (1% carbon) 7.81 g/cc

Carbon steel defects

Although carbon steel is widely used, it also has certain defects. In the process of smelting and forging carbon steel, due to equipment and process operations and other reasons, the defects of the steel, generally including scarring, white spots, loose, non-metallic inclusions.

Carbon steel use

1. Q195 is used to manufacture parts with small loads, iron wire, iron rings, horns, split pins, tie rods, stamping parts, and welding parts.

2. Q215 A is used to manufacture tie rods, ferrules, washers, osmotic rings, carburizing parts, and welding parts.

3, Q235 AA, B grade for the manufacture of metal structural parts, carburizing parts or carbonitriding parts, tie rods, connecting rods, hooks, couplers, bolts, nuts, sleeves, shafts Connectors; Grades C and D are used to make important welded structural parts.

4, Q255 A For the manufacture of shafts, spindles, hooks, tie rods, rocker, wedge and other parts that do not require high strength. This negative weldability is acceptable.

5, Q275 Used to make shaft, sprocket, gear, hook and other high-strength parts.

  

Carbon steel manufacturing process

The manufacturing process of carbon steel is usually carried out in converters and open furnaces. Smelting ordinary converters for carbon steel, while the open furnace can smelt a variety of high-quality carbon steel. The manufacture of carbon steel must be carried out through a number of manufacturing steps before it can be smelted.

Carbon steel prices

The price of carbon steel is generally around 300-500 tons per ton.

Note: This price is for reference only! Due to geographical differences, of course, the price will be different. For more details on the prices, please refer to the local distributors!

The difference between carbon steel and stainless steel

The difference between carbon steel and stainless steel is first of all resistance to corrosion. However, in practical applications, stainless steel, with its excellent properties, has an irreplaceable role for other steels, such as some high-temperature-resistant stainless steels, and an excellent surface such as stainless steel. Characteristics are used in a large number of decorative materials, and the excellent mechanical properties of stainless steel make it suitable for use in various manufacturing industries.

Editor's summary: The above is an introduction to the difference between carbon steel and stainless steel in carbon steel classification. I hope to help friends who have this requirement! For more information, please continue to pay attention to our website, follow-up will show more exciting content.

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