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Industrial Articles

Technical articles on OCTG, alloy and stainless steel: grades, heat treatment, corrosion limits and field practice, written by the ShunFu Metal team.

How Quenching Temperature Affects Cr-Mo Steel Properties

The pipe body material of oil drill pipe is generally low-carbon chromium-molybdenum alloy steel. During drilling operations, the drill pipe is often subjected to complex loads such as tension, bending, torsion, impact, and collision. The service environment is very harsh, which requires the drill pipe to have high strength and high impact toughness. If the

2026-01-28T06:02:08+00:00August 8th, 2025|Industrial Articles|
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How to use a double centralizer

The primary benefit of a double centralizer is stabilizing the azimuth. In practice, we've found that in most cases, dual centralizers stabilize and slightly increase azimuth. Some drill string configurations often exhibit a strong azimuth increase, but proper use prevents azimuth loss. Therefore, dual centralizers should always be used when the azimuth is just right

2026-01-28T06:02:08+00:00August 8th, 2025|Industrial Articles|
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Study on Heat Treatment Technology of X80 Seamless Steel Pipe

Pipelines are essential for transporting oil, natural gas, and even solid materials like coal over long distances. As global energy demands grow, high-pressure, long-distance transmission pipelines have become vital for large-scale natural gas delivery. This has driven the rapid development of high-grade pipeline steels. In harsh environments, traditional welded pipes often fall short, making

2026-01-28T06:02:08+00:00August 8th, 2025|Industrial Articles|
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How to determine the post-weld heat treatment temperature of T/P91 alloy steel?

T/P91 alloy steel is widely used in high-temperature and high-pressure piping systems, especially in power and petrochemical industries. While its welding and heat treatment processes are well-documented, there remains some confusion and inconsistency in practical applications, particularly regarding the selection of post-weld heat treatment (PWHT) temperatures and durations. This article offers a practical perspective

2026-01-28T06:02:08+00:00August 8th, 2025|Industrial Articles|
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How Composition, Structure, and Processing Shape 125ksi Super Martensitic Pipes

Oil and natural gas are vital national strategic resources. As exploration and production shift toward deepwater offshore fields, deep terrestrial formations, and unconventional resources, the demand for high-performance materials, particularly high-end specialty steels, has increased significantly. These demanding environments require steel materials with exceptional strength, corrosion resistance, and reliability. To address this rising demand,

2026-01-28T06:02:08+00:00August 8th, 2025|Industrial Articles|
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Ultra Alloy 825: The Optimal Choice for Oil and Gas Industry – Superior Performance in Sour Gas Environments

 Ultra Alloy 825: The Optimal Choice for Oil and Gas IndustryOur customers in the oil and gas industry are increasingly turning to Ultra Alloy 825 according to our Ultra Alloy 825 product manual, as it demonstrates exceptional performance in demanding operating environments, particularly in "sour" sulfur-containing environments.Ultra Alloy 825 is a titanium-stabilized nickel-based alloy with

2026-01-28T06:02:08+00:00June 17th, 2025|Industrial Articles|
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China’s Pressure Vessel Materials Reach World-Class Standards: Comprehensive Development from 2000-2020

China's Pressure Vessel Materials Reach World-Class Standards: Comprehensive Development from 2000-2020The rapid development of petrochemical and coal chemical industries from 2000 to 2020 has driven pressure vessel products toward larger scale and higher parameter specifications. This period has witnessed remarkable achievements in the research, development, and application of high-temperature, high-pressure, and corrosion-resistant materials. Key domestic

2026-01-28T06:02:08+00:00June 17th, 2025|Industrial Articles|
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Control Method for Double-sided Formation with Single-pass Single-side Submerged Arc Welding in Steel Strip Butt Joints for Spiral Welded Pipes

Keywords: SAWH pipe, steel strip, single pass, single-side submerged arc welding double-side formation In spiral welded pipe production, steel strip butt joints typically require front-side submerged arc welding at the butt joint position, followed by root cleaning and back-side submerged arc welding after pipe formation. To eliminate the back-side welding process and improve efficiency,

2026-01-28T06:02:34+00:00January 20th, 2025|Industrial Articles|
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Analysis and Application of TIG Repair Welding Technology for Small-sized Spiral Welded Pipe

Abstract The repair welding process for small-diameter spiral welded steel pipes has long been constrained by spatial limitations. Due to the small diameter, workers cannot use electrode arc welding to repair inner weld defects, making welding quality a bottleneck restricting enterprise development. To ensure product quality, the company employs TIG welding repair technology for

2026-01-28T06:02:34+00:00January 17th, 2025|Industrial Articles|
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AISI 4147 Steel Quenching Guide: Water-Based vs. Oil-Based Performance Analysis

Introduction With the rapid development of hydrogen energy infrastructure, the demand for large-diameter high-pressure storage cylinders continues to grow. AISI 4147 steel has emerged as an ideal material for manufacturing these critical components. This comprehensive analysis explores the impact of different quenching media on AISI 4147 steel properties. Industry Background and Significance Market Trends

2026-01-28T06:02:34+00:00January 16th, 2025|Industrial Articles|
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