CoreMetal Technical Team

Understanding Aluminum Temper Designations Aluminum alloys derive their mechanical properties not just from their chemical composition, but critically from their temper — the thermal and mechanical treatment applied to achieve specific strength, hardness, and formability characteristics. The Aluminum Association (AA) temper designation system uses a letter suffix appended to the alloy number (e.g., 6061-T6, 5052-H32) […]

Why Pipeline Coating Selection Matters in 2026 Steel pipeline corrosion remains one of the most costly challenges in oil, gas, and water transportation infrastructure. With global corrosion costs exceeding $2.5 trillion annually, selecting the right pipeline coating system is critical for asset integrity, operational safety, and long-term cost reduction. The three dominant external coating systems

What Is HSLA Steel High-Strength Low-Alloy (HSLA) steel provides improved mechanical properties and greater atmospheric corrosion resistance than carbon steels, with total alloy content typically below 2-3%. Unlike Q&T steels, HSLA derives strength from controlled chemistry and thermomechanical processing. HSLA Steel Grades and Specifications Standard Grade Yield (MPa) Tensile (MPa) Typical Use ASTM A572 42

What Is Pipeline Pigging and Why It Matters Pipeline pigging uses devices called pigs to perform maintenance operations inside pipelines without stopping flow. Pigs clean deposits, separate products in batch transfer, inspect pipe wall integrity, apply coatings, and dewater pipelines. Pig Launcher and Receiver Design Launcher components: Main barrel (1.25-1.5x pipeline ID), quick-opening closure, kick-off

Why Manufacturing Method Matters for Duplex Stainless Steel Duplex stainless steels possess a mixed microstructure of ~50% austenite and ~50% ferrite, providing high strength and excellent corrosion resistance. However, this dual-phase microstructure is sensitive to thermal history, making the manufacturing method critically important. Seamless Duplex SS Pipe Manufacturing Process: Billet heating (1150-1250C) -> Mannesmann piercing

Why Titanium Demands Exceptional Shielding Above 400C, titanium begins absorbing oxygen and nitrogen. Above 700C, it reacts violently with nitrogen. Even small amounts of gas absorption (0.1%) can reduce weld ductility by 50% or more. The entire weld zone must be protected until temperature drops below 260C. Shielding Gas Selection Primary: 100% Argon (Grade A

Why Branch Connections Need Reinforcement Branch connections create an opening in the main pipe, reducing the pressure-containing cross-section and creating stress concentration. Without proper reinforcement, the branch becomes the weakest point – prone to burst, fatigue failure, or corrosion-related thinning. Types of Branch Reinforcement Fittings Weldolet (Welding Outlet): Butt-weld branch connection with contoured body. Strongest

Why Nickel Alloys for Heat Exchangers Heat exchangers in aggressive environments demand materials that resist corrosion while maintaining thermal efficiency. Nickel alloys offer exceptional corrosion resistance, high-temperature strength, thermal stability, and resistance to stress corrosion cracking. Nickel Alloy Grades for Heat Exchanger Tubes Alloy UNS Key Properties Max Temp PREN Alloy 625 N06625 Excellent pitting