Britannica
Sources used in this answer
Why is the titanium alloy Ti-3Al-8V-6Cr-4Mo-4Zr used in sour-gas equipment?
Created from Britannica articles
using AI.
AI can make mistakes, so verify using Britannica articles.
titanium processing
High-purity (99.999 percent) titanium metal.
The titanium alloy Ti-3Al-8V-6Cr-4Mo-4Zr is utilized in sour-gas equipment primarily due to its exceptional resistance to high-temperature sour gas, which is natural gas containing hydrogen sulfide.1
Beyond its chemical durability, this alloy is characterized by its high strength, making it particularly suitable for demanding energy extraction applications, including downhole tubing, casings, and instrumentation. While commercially pure titanium is often selected for its corrosion resistance when strength is not a primary concern, this specific alloy is part of a group of materials designed to extend the utility of titanium into environments involving stronger concentrations of reducing acids and acidic salts.1