Titanium Grade 3

Titanium Grade 3 (CP Grade 3) – Properties, Applications and Technical Data

Titanium Grade 3 is a commercially pure titanium alloy (≈99.3% Ti) that offers a balanced combination of good strength, high corrosion resistance and low weight. Compared to Grade 1 and 2, Grade 3 has higher mechanical strength, while maintaining very good weldability and formability. The material is often used in the process industry, marine environments, heat exchangers and industrial applications where increased strength is required without compromising corrosion resistance.

Properties of Titanium Grade 3

Titanium Grade 3 has a hexagonal (HCP) crystal structure and a slightly higher oxygen content than Grade 1 and 2, which provides improved strength. The material is still unalloyed and retains the natural advantages of commercially pure titanium, such as good toughness, high corrosion resistance and reliable weldability.

- Type: Unalloyed, commercially pure titanium
- Purity: ≈99.3% Ti
- Structure: HCP (hexagonal close-packed)
- Designations: Titanium Grade 3, CP Grade 3, Titanium Grade 3, UNS R50550, Werkstoffnr 3.7055, ASTM B265, ASTM B348, AMS 4943

Advantages

• Higher strength than Grade 1 and Grade 2
• Very good corrosion resistance in aggressive environments
• Low weight – approximately 45% lighter than steel
• Good weldability and formability
• Maintains toughness at low temperatures
  
  
  

Limitations

• Lower strength than alloyed titanium materials (e.g. Grade 5 and Grade 23)
• Not hardenable by heat treatment
• Slightly worse formability than Grade 1 and Grade 2
  
  
  

Typical applications

Chemical & Process industry

Pipes, tanks, heat exchangers and components in corrosive chemical environments.

Marine & Offshore

Components exposed to seawater and marine atmospheres where both strength and corrosion resistance are required.

Paper & Pulp

Bleaching and chemical handling equipment where long service life is essential.

Industrial applications

Pressure vessels, piping systems and mechanical components with moderate load requirements.

Corrosion resistance

Titanium Grade 3 forms a stable and self-healing oxide film that provides excellent protection against corrosion in most oxidizing and chloride-based environments, even with prolonged exposure.

Environments where Titan Grade 3 performs well:

• Seawater and marine environments
• Chloride solutions
• Oxidizing acids (e.g. nitric acid)
• Organic acids and alkaline solutions
  
  
  

Environments that should Avoid:

• Hydrofluoric acid (HF)
• Reducing acids at elevated temperatures
• Highly concentrated metal chlorides in hot environments
  
  
  

Technical data (annealed condition)

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