Seamiess Pipe

304 seamless steel pipe is a seamless steel pipe made of 304 stainless steel as raw material. 304 stainless steel belongs to austenitic stainless steel, and its main chemical composition is as follows:

Chromium (Cr): The content is about 18% - 20%. Chromium is the key element that makes stainless steel corrosion-resistant. It can form a dense chromium oxide protective film on the surface of stainless steel to prevent further corrosion of the steel by external media.

Nickel (Ni): The content is generally in the range of 8% - 10.5%. The addition of nickel helps to stabilize the austenite structure, giving stainless steel good toughness, plasticity and machinability, and can further enhance the corrosion resistance of stainless steel, especially in some highly corrosive environments such as chloride ions.

Carbon (C): The content is relatively low, usually not exceeding 0.08%. The lower carbon content helps to reduce the precipitation of carbides and avoid adverse effects on the corrosion resistance and toughness of stainless steel.

In addition, it also contains a small amount of impurity elements such as manganese (Mn), silicon (Si), phosphorus (P), and sulfur (S), but their contents are strictly controlled at a low level to ensure the excellent performance of stainless steel.Brands from various countries that match 10# steel: ASTM A240/A240M - 304、DIN EN 10088-2 - 1.4301、JIS G4305 - SUS304、ГОСТ 5632-72 - 08Х18Н10

45# steel seamless steel pipe is a seamless steel pipe made of 45# steel as raw material. 45# steel is a high-quality carbon structural steel with a carbon content of about 0.42% - 0.50%, which is significantly higher than 10# steel and 20# steel. In addition to carbon, it also contains appropriate amounts of manganese (generally 0.50% - 0.80%), silicon (about 0.17% - 0.37%), sulfur, phosphorus and other impurity elements. Among them, manganese helps to improve the strength and toughness of steel, and silicon can enhance the deoxidation ability of steel. These elements jointly affect the performance of 45# steel. The higher carbon content allows 45# steel to obtain higher strength and hardness after proper heat treatment.Brands from various countries that match 45# steel: AISI 1045、S45C、CK45、060A47.

20# steel seamless steel pipe is a seamless steel pipe made of 20# steel as raw material. 20# steel is a high-quality carbon structural steel with a carbon content of about 0.17% - 0.24%, which is higher than that of 10# steel. In addition to carbon, it also contains appropriate amounts of manganese (generally 0.35% - 0.65%), silicon (about 0.17% - 0.37%), sulfur, phosphorus and other impurity elements. Manganese helps to improve the strength and toughness of steel, and silicon can enhance the deoxidation ability of steel. These elements jointly affect the performance of 20# steel.Brands from various countries that match 20# steel: AISI 1020、S20C、CK20、C22.8、080A20.

10# steel seamless steel pipe is a seamless steel pipe made of 10# steel as raw material. 10# steel is a high-quality carbon structural steel with a carbon content of about 0.07% - 0.14%, which belongs to the category of low-carbon steel. It also contains a small amount of impurity elements such as manganese, silicon, sulfur, and phosphorus. The manganese content is generally around 0.35% - 0.65%, and the silicon content is about 0.17% - 0.37%. The presence of these elements has different degrees of influence on the performance of steel. For example, manganese can improve the strength and toughness of steel, and silicon helps to enhance the deoxidation ability of steel.Brands from various countries that match 10# steel: AISI 1010, SAE 1010, S10C, CK10, 040A10