The difference between carbon steel and stainless steel pipe

Stainless steel tubing and carbon steel tubing are both good choices for different uses, so it can be hard to know which is right.
Carbon steel and stainless steel pipes both belong to metallic steel pipes, but the content of metal elements in them is different, which also leads to the characteristics of stainless steel pipes that are more resistant to corrosion than steel. They are carbon, but they have a higher purchase cost. . Typically, both have similar basic elements of iron and carbon. The difference is that the carbon steel pipe has an alloy content of 10.5, while the stainless steel pipe has a chromium content of 10.5 and more. Also, the main difference is its distinct physical characteristics.

What are carbon steel pipes used for?

Carbon steel pipes are made from steel ingots or solid round steel through holes into capillary tubes, and then they are made by hot rolling, cold rolling or cold drawing. Carbon steel pipe has an important position in the steel pipe industry of my country. Carbon steel pipe is used for liquid, gas and steam services in above and underground services. It is not recommended for use in corrosive services, but it may be used in caustic services.

The difference between carbon steel and stainless steel pipes. Carbon steel pipes are divided into two types of hot-rolled and cold-rolled steel pipes.

Hot-rolled carbon steel pipes: Pipe Hot carbon steels are divided into general steel pipes, low and medium pressure boiler steel pipes, high pressure boiler steel pipes, alloy steel pipes, steel pipes, oil cracking pipes, geological steel pipes. . and other steel pipes
cold rolled carbon steel pipes: in addition to general steel pipes, steel pipes for low and medium pressure boilers, steel pipes for high pressure boilers, alloy steel pipes, stainless steel pipes, Oil crack pipes and other steel pipes, cold-rolled carbon steel pipes also include thin-walled carbon steel pipes, thin-walled alloy steel pipes, thin-walled steel pipes and special-shaped steel pipes.

Stainless steel pipes are made from acid-resistant and heat-resistant steel ingots that are heated, drilled, measured, hot-rolled and cut.
Stainless steel pipe Steel is a hollow round steel and is mainly used in piping systems to transport fluids or gases, and is also widely used in petroleum, chemical, medical, food, light industries, machinery and precision tools, and other pipelines. Industrial transport is used. In addition, when the bending and twisting resistance is the same, the weight is lighter, so it is widely used in the construction of mechanical parts and engineering structures. It is also often used as furniture and kitchen utensils.

The difference between carbon steel and stainless steel pipes are common carbon steel pipes Q195 and Q235. Carbon steel can also be called magnetic alloy steel, except for carbon and iron, it generally contains a small amount of silicon, manganese, sulfur and phosphorus. Stainless steel is chromium-nickel steel, in addition to carbon and iron, there are other metal elements such as chromium, nickel and copper. Chromium content in steel pipe more than 12.5 forms a protective film (passive film) on the surface of steel pipe to achieve anti-corrosion effect. Therefore, the main difference between these two is corrosion resistance. Carbon steel pipes rust easily, while stainless steel pipes are corrosion-resistant steel.
Stainless steel pipes are shiny and come in various grades that can increase the chromium content of the alloy. Until the steel coating becomes reflective like a mirror. For the casual observer, carbon steel pipe and stainless steel pipe can be easily distinguished. Carbon steel pipe is dull, with a matte finish comparable to cast iron pots or wrought iron railings.

Stainless steel pipe is a unique type of steel that does not corrode. It obtains this property by using chrome as a special hardening agent. By using chromium, stainless steel has the basic properties of steel with a significant increase in corrosion resistance. Like carbon steel, stainless steel needs oxygen to react in air to form an oxide layer. However, instead of forming an iron oxide layer, it forms a chromium oxide layer. Iron oxide is a volatile molecule that helps oxidation and this is the problem we create in carbon steel. However, chromium oxide is inert - it forms a protective layer that prevents further oxidation. For this reason, stainless steel pipes can be used in open systems as well as applications that require a high level of hygiene, such as food and brewing industries.