Gr2 Titanium Plate - A New Interpretation in the Construction
The exterior facade of the building is a new application scenario for Gr2 titanium plates in the construction industry. Due to the unique silver-gray metallic luster of the acid-washed surface of titanium materials, as well as the possible changes from cool silver to warm gold under different angles of light, the dynamic visual characteristics presented, combined with the series of advantages of titanium itself.
1.Application forms and process details:
| Application Form | Typical Thickness | Surface Treatment | Technical Points |
| Flat curtain wall | 0.4-0.8mm | Annealing/ Pickling | Control the flatness of the plate shape. According to ASTM B265, the unevenness in the length direction should be ≤ 1.5mm/m |
| Hole-punched curtain wall | 0.6-1.0mm | Anodic oxidation | The hole diameter and spacing need to be calculated based on structural requirements. The opening rate is usually controlled within 15-40% |
|
Special-shaped pl ate |
0.5-0.8mm | Polishing/Rubbing | Require stamping or sheet metal forming. The elongation of Gr2 should be ≥ 20%, and its formability is better than Gr4 |
Key technical parameters of Gr2 titanium plate (ASTM B265)
For applications in the construction industry, the following parameters are the most crucial:
| Parameters | Typical value of Gr2 Titanium Plate | The engineering significance for architectural applications |
| Tensile strength | 345-550 MPa | Meet the requirements of conventional building loads and have sufficient safety factors |
| Yield strength(0.2% offset) |
≥275 MPa | Used to determine the design value of the load-bearing capacity of the sheet material |
| Elongation | ≥20% | Ensure that the sheet material can be cold-formed and profiled, meeting the requirements for complex surface shaping |
| Elastic modulus | 105 GPa | It is approximately half the weight of steel. When designing the stiffness, special attention must be paid to controlling the deflection |
| Density | 4.51 g/cm³ | Approximately 57% of the steel, reducing the structural weight |
| Hardness (HRB) | 80-85 | Suitable for conventional sheet metal processing equipment, but requires the use of titanium-specific cutting tools |
| Coefficient of Thermal Expansion(CTE) | 8.5×10⁻⁶/℃ | Between aluminum and steel, the joint design needs to account for the deformation allowance |
| Thermal Conductivity | 16-18 W/(m·K) | It is approximately one-third the thickness of steel, and its heat insulation performance in summer is superior to that of conventional materials for metal roofs |
2.Key technical details - Anodic oxidation coloring
Gr2 titanium plate can form a transparent titanium oxide film on the surface through anodic oxidation. The interference effect of light can present different colors without using any pigments or coatings. The key parameters for this process are as follows:
Voltage 10V: Golden
Voltage 20V: Purple
Voltage 30V: Blue
Voltage 40V: Blue-green
Voltage 50V: Green
Voltage 60-80V: Gradual change from yellow to pink
The thickness of the anodic oxidation film is usually between 50 and 200 nanometers, and it has an extremely strong bonding force with the base metal, without any coating peeling problems. This makes Gr2 titanium plates an ideal choice for designers who pursue unique architectural expressions.
3.Benchmark case
In recent years, the application of titanium in the construction industry in China has accelerated. Besides the titanium materials used in the dome of the National Grand Theatre, titanium decorations have also appeared in residences in Guangzhou and Shenzhen. The colorful titanium ice flower style house decorations have also emerged, enriching the application scenarios of titanium in the construction field. In 1973, the golden-roofed Asahi-no-Mikoto Shrine in Sakura Town, Oita Prefecture, Japan, as well as buildings in the United Kingdom, France, the United States, and other countries, all have examples of using titanium alloy as the roof. Besides the roof, the exterior walls, curtain walls, cornices, ceilings, harbor facilities, bridges, underwater tunnels, decorations, pipes, etc. of the buildings also use titanium alloy.
At present, there are over 600 titanium landmark buildings around the world. The environmental-friendly and excellent properties of titanium alloys make them an ideal material for green buildings and sustainable development projects. This helps to drive the construction industry towards a more environmentally friendly and sustainable direction. The future application prospects are extremely broad.
Conclusion
Gr2 titanium plates (produced in accordance with ASTM B265 standards) are being increasingly utilized in the construction industry, particularly in applications such as building exterior curtain walls, roof systems, coastal bridge guardrails, and splash guards. With their exceptionally long service life (over 100 years), maintenance-free properties, and unique metallic aesthetics, they are gradually moving away from being exclusive materials for high-end landmark buildings and expanding into a wider range of engineering applications.
Its core value proposition can be summarized as: "High initial cost, but the lowest total life-cycle cost." For construction projects that aim for long-term value, reduced maintenance burden, and adaptation to extreme environments, Gr2 titanium plates offer an irreplaceable solution.
