Titanium Grade 1 (CP Grade 1) – Properties, Applications and Technical Data
Titanium Grade 1 is a commercially pure titanium alloy (≥99.5% Ti) with very high corrosion resistance, low weight and excellent formability. It is the softest and most ductile of the commercially pure titanium alloys and is often used in the chemical industry, medical technology, marine environments and heat exchangers.
Properties of Titanium Grade 1
The high purity and HCP (hexagonal close-packed) structure give the material very good weldability and biocompatibility, making it well suited for implants, medical components and components in corrosive environments.
- Type: Unalloyed, commercially pure titanium
- Purity: ≥99.5% Ti
- Structure: HCP (hexagonal close-packed)
- Designations: Titanium Grade 1, CP Grade 1, UNS R50250, Werkstoffnr 3.7025, ASTM B265, ASTM F67, AMS 4900, ISO 5832-2
Advantages
- Very high corrosion resistance in chloride and seawater environments
- Very low weight – approximately 45% lighter than steel
- Excellent formability and weldability
- Biocompatible – approved for medical technology and implants
- Maintains toughness even at very low temperatures
Limitations
- Lower strength compared to alloyed titanium materials (e.g. Titanium Grade 5 / Ti-6Al-4V)
- Not hardenable by heat treatment
- Not optimal for heavy mechanical loads or temperatures above ~300°C
Typical applications
Chemical industry
Pipes, tanks and components in corrosive chloride environments.
Medical technology & Biotechnology
Implants, orthopedic fasteners and equipment thanks to biocompatibility.
Marine & Offshore
Components in seawater-exposed systems, heat exchangers and boat equipment.
Paper & Pulp
Bleaching and acid treatment systems where high corrosion resistance is required.
Energy & Heat exchangers
Tubes and plates where low weight and long service life in aggressive chemical environments are required.
Corrosion resistance
Titanium Grade 1 develops a passive oxide film that provides long-term protection against corrosion in most oxidizing and chloride-based environments.
Environments where Titan Grade 1 works well:
- Seawater, cold and hot
- Chloride solutions (e.g. NaCl, CaCl₂)
- Oxidizing acids (e.g. nitric acid)
- Organic acids, alkaline solutions, hydrogen peroxide
Environments to avoid:
- Hydrofluoric acid (HF)
- High temperatures in reducing acids (e.g. hot sulfuric acid or hydrochloric acid)
- Highly concentrated metal chlorides at elevated temperatures
Technical data (annealed condition)
| Yield strength (0.2%): |
~170–240 MPa |
| Tensile strength: |
~240–350 MPa |
| Elongation at fracture: |
~24–30% |
| Density: |
~4.51 g/cm³ |
| Modulus of elasticity: |
~105 GPa |
| Thermal conductivity: |
~17 W/m·K |
| Recommended maximum temperature: |
≤300°C (shortly up to 425°C) |
| Weldability: |
Excellent – recommended filler material: AWS A5.16-90 ERTi-1 |
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