What is the chemical composition of K55 material

What is the chemical composition of K55 material

K55 seamless steel pipe is primarily made of carbon structural steel, containing appropriate amounts of elements such as carbon, silicon, and manganese. These elements interact to give K55 seamless steel pipe its high strength, excellent toughness, and good wear resistance. In terms of chemical composition, the phosphorus (P) and sulfur (S) content are strictly controlled to ≤0.030%. While other chemical components have no special requirements, it is precisely this precise composition that contributes to the outstanding performance of K55 seamless steel pipe in the oil drilling field. It is manufactured strictly according to the API (American Petroleum Institute) 5CT standard, a high standard that ensures stable product quality and performance, making it a reliable choice for the oil drilling industry.

What are the mechanical properties of K55 material?

Yield Strength: The yield strength of K55 seamless steel pipe ranges from 379 to 552 MPa. This allows it to maintain a stable structure under formation pressure and the weight of downhole equipment, effectively resisting deformation and providing a solid guarantee for casing installation in oil and gas wells.

Tensile Strength: With a tensile strength ≥655 MPa, K55 seamless steel pipe is not easily broken under large tensile forces during complex downhole operations, effectively ensuring the smooth progress of drilling operations.

Toughness and Crushing Resistance: K55 seamless steel pipe possesses good toughness and crushing resistance, enabling it to adapt well to complex and changing geological conditions downhole and various impacts generated during construction. Even when encountering rock compression or formation movement, it can maintain the integrity of the casing, providing a reliable channel for oil and gas extraction.

What are the applications of K55 steel pipes?

Oil and Gas Well Casing Installation: K55 seamless steel pipes are primarily used for casing installation in oil and gas wells, performing particularly well in shallow and medium-depth oil and gas wells. In relatively low temperature and pressure environments, it fully utilizes its excellent performance, providing stable casing support for oil and gas extraction.

Downhole Piping: It can also be used for downhole operations such as water injection and gas injection, meeting the needs of different extraction processes. Whether transporting high-pressure water for formation fracturing or injecting natural gas for gas lift oil production, K55 seamless steel pipes ensure smooth operations thanks to their superior performance.