How to distinguish mild steel pipe and carbon steel pipe?

Posted by zora li on March 15th, 2023

How to distinguish mild steel pipe and carbon steel pipe?

Mild steel is a type of carbon steel in which the carbon content is very low. Approximately 0.16–0.29% by weight. This steel is cheap and the most commonly used. It is malleable and malleable, but has low tensile strength. Low carbon cannot be hardened by heat treatment.

Mild steel is the mildest form of seamless carbon steel pipe, with a relatively low carbon content. Mild steels may also contain other elements such as manganese, silicon and traces of phosphorus. These additional elements protect the integrity of the metallic iron structure by preventing dislocations within the iron crystals. Carbon acts as a hardening agent and the percentage of carbon added is directly proportional to the strength of the steel; the strength of steel generally increases with the percentage of carbon added.

Mild steel has a very low carbon content compared to other carbon steels. Mild steel has high ductility and ductility, while other carbon steel types have low ductility. Mild steel cannot be hardened by heat treatment, but other types of carbon steel can be hardened by heat treatment. Mild steel has lower strength and hardness than other carbon steel types. It is usually expressed by the surface roughness Ra of steel.

The surface roughness of the pipeline is mainly manifested in the following aspects: The surface roughness of the wearing parts. The rougher the surface, the smaller the effective contact area with the bearing, the greater the pressure, and the faster the wear.

MS seamless pipe has some features:

1. Seamless steel pipe is a carbon steel with a carbon content of less than 0.25%. Because of its low strength, low hardness and softness, it is also called low carbon steel.

2. The annealed structure of seamless steel pipe is ferrite and a small amount of pearlite, with low strength and hardness, but good plasticity and toughness.

3. Seamless steel pipe has good cold forming performance, and can be cold formed by crimping, bending, stamping and other methods.

4. Low carbon steel pipe and seamless steel pipe have good weldability. It is easy to accept various processing such as forging, welding and cutting.

Carbon steel contains approximately 0.05-1.70% carbon by weight. Increasing the percentage of carbon in steel gives it extra strength and is also considered to be the most economical way to increase the strength of steel. However, steel also tends to become brittle and less ductile due to the addition of more carbon. Therefore, a proper balance of carbon must be added to obtain the extra properties of the steel. The carbon content of high carbon steel is between 0.3-1.70%, and the carbon content of low carbon steel is between 0.05-0.15%. Mild steel is the most commonly used grade of steel today due to its relatively low manufacturing price.

Seamless carbon tube is the most commonly used material for process piping. It offers the advantages of wide availability, high strength and various connection possibilities, such as screw connections, socket welds and butt welds. Steel pipe should be selected based on the strength and durability required for the application and the ductility and workability required to join the steel pipes and form them into pipe spools. Piping must withstand the pressure, temperature and corrosive conditions of the application. It is used for liquid, gas and steam services in above-ground and underground services. Not recommended for corrosive service, but available for corrosive service.

Mild steel has a very low carbon content compared to other carbon steels. Mild steel has high ductility and ductility, while other carbon steel types have low ductility. Mild steel cannot be hardened by heat treatment, but other types of carbon steel can be hardened by heat treatment. Mild steel has lower strength and hardness than other carbon steel types. High carbon steels can be heat treated better than mild steels and are therefore useful in many applications. Other elemental impurities can also give steel very interesting properties; namely sulfur. Some common applications of high carbon steel include: rails, prestressed concrete, wire rope, tire reinforcement, knives, saw blades, gears, chains, and more.