Titanium Grade 2 (UNS R50400) is one of the most widely used commercially pure titanium alloys. Known for its excellent corrosion resistance, lightweight properties, and strong ductility, Titanium Grade 2 has become a staple in applications demanding resilience in harsh environments. This alloy offers a compelling balance of strength, corrosion resistance, and versatility, making it ideal for applications across diverse industries.
Properties of Titanium Grade 2
As a commercially pure titanium alloy, Grade 2 contains a minimum of 99% titanium with slight variations in oxygen and iron content. These small differences in chemical composition allow Grade 2 to achieve optimal strength and ductility for industrial use, surpassing stainless steel in corrosion resistance in many environments.
Titanium Grade 2’s corrosion resistance is due to its stable, protective oxide film, which forms in the presence of oxygen. This natural barrier makes Grade 2 highly resistant to oxidizing, neutral, and mildly reducing environments, as well as seawater, chlorides, and a range of industrial acids. Its durability against chlorides and industrial gases makes it ideal for challenging environments, from marine atmospheres to exposure to nitric and chromic acids in chemical processes.
Fabrication and Heat Treatment
Titanium Grade 2 can be easily cold-formed, machined, welded, and effectively hot-worked. For hot work, Grade 2 performs best between 400°F and 600°F.
Stress-relieving processes involve heating the alloy to temperatures between 900°F and 1100°F, followed by slow or forced air cooling. Annealing, an essential step for achieving ductility, requires heating between 1200°F and 1400°F.
When it comes to welding, inert gas shielding is necessary to avoid embrittlement due to oxygen absorption. MIG and TIG welding are preferred methods, often utilizing an argon-helium gas mixture for optimum results. Preheat or post-heat treatments are normally not needed, which simplifies the welding process.
KEY INDUSTRIES & APPLICATIONS
Due to its low density and high strength-to-weight ratio, Titanium Grade 2 is valued in industries where lightweight, durable materials are essential:
- Chemical Processing: Resistant to a wide range of corrosive chemicals, making it ideal for reactors, heat exchangers, and piping systems.
- Oil & Gas: Used in extreme conditions requiring high resistance to aggressive chemicals and saline environments.
- Marine: Reliably withstands seawater exposure and is ideal for desalination processes.
- Space Exploration: Ideal for airframe and engine components requiring durability without added weight.
- Medical: Biocompatible and corrosion-resistant, perfect for surgical implants and instruments.
Additionally, Grade 2’s maintains good impact properties at low temperatures. The ASME BPVC allows it to be used down to -75°F. It can be used in continuous service at temperatures up 800°F and in intermittent service up to 1000°F.
Offering an ideal mix of corrosion resistance, strength to weight ratio, and durability, with straightforward fabrication and heat treatment options, Titanium Grade 2 provides reliability and performance in harsh environments.
Corrosion Materials has been a worldwide leader in supplying corrosion-resistant alloys, including Titanium Grade 2 in various forms. We are proud to support diverse industry needs with high-quality products ready for immediate application or processing. Please reach out to us today to learn how we can help meet your requirements.