Latest News

• 08-14

  2025

  Key factors affecting the life of seamless steel pipes

  The service life of seamless steel pipes does not have a fixed value—it can range from just a few years to several decades, or even over a century. This lifespan is determined by multiple interrelated factors. United Steel Industry Co., Ltd summarizes the five most critical considerations.
• 08-14

  2025

  API 5L PSL1 seamless carbon steel pipe

  API 5L PSL1 is a material standard issued by the American Petroleum Institute (API) for steel pipes primarily used in oil and natural gas transportation. The standard ensures that the pipe offers the necessary strength, toughness, and corrosion resistance to perform reliably in complex transportation environments and under demanding operating pressures. This article will briefly introduce API 5L PSL1 seamless carbon steel pipe.
• 08-06

  2025

  Details of 45Mn2 seamless steel pipe

  As a high-performance alloy structural steel, 45Mn2 seamless steel pipe holds an essential position in industrial applications. Known for its excellent mechanical properties and good processability, it is widely used across machinery manufacturing, petrochemical engineering, the automotive sector, and more. This article will briefly introduce 45Mn2 seamless steel pipe.
• 08-05

  2025

  Which seamless steel pipe is the hardest?

  When people ask about the “hardest” seamless steel pipe, it’s important to clarify what “hardness” really means. In metallurgy, hardness often refers to a material’s resistance to wear, abrasion, or deformation. While high hardness can improve durability, it often comes at the expense of toughness—so not all applications benefit from extremely hard steel. In this article, we’ll explore what makes a seamless steel pipe “hard,” what factors affect its hardness, and which types of steel pipes are typically considered the hardest.