概述
Titanium Grade 2 (Commercially Pure Titanium, CP Ti Gr.2) is the most widely used unalloyed titanium product for pipe and tube applications. It offers an excellent balance of moderate strength, exceptional corrosion resistance, excellent formability, and outstanding biocompatibility. With a minimum purity of 99.0% titanium, it is immune to corrosion in virtually all chloride-bearing aqueous environments, including seawater at all temperatures and velocities, and is the go-to choice for heat exchangers, desalination plants, chemical processing, and marine piping.
描述（英文）
Titanium Grade 2 (Commercially Pure Titanium, CP Ti Gr.2) is the most widely used unalloyed titanium product for pipe and tube applications. It offers an excellent balance of moderate strength, exceptional corrosion resistance, excellent formability, and outstanding biocompatibility. With a minimum purity of 99.0% titanium, it is immune to corrosion in virtually all chloride-bearing aqueous environments, including seawater at all temperatures and velocities, and is the go-to choice for heat exchangers, desalination plants, chemical processing, and marine piping.
尺寸范围
- OD: 6.35 mm (1/4") – 325 mm (12.8")
- WT:0.5 mm (0.020") – 12.7 mm (0.500")
- ID:5.35 mm – 300 mm (from OD & WT)
- L:Up to 18 m (60 ft); U-bend tubes available
牌号标准
| 标准体系 | 数值 |
|---|---|
| 🇺🇸 UNS | R50400 |
| 🇺🇸 ASTM | Grade 2 (ASTM B338, B861, F67, AMS 4902) |
| 🇺🇸 AMS | AMS 4942 / 4943 (tubing) |
| MIL-T-9046 | Type II Comp B |
| 🇪🇺 EN | Grade 2 (EN ISO 5832-2 for implant) / EN 3.7035 |
| 🇩🇪 DIN | 3.7035 |
| 🇯🇵 JIS | TP340H (JIS H4631) / Class 2 |
| 🇨🇳 GB | TA2 (GB/T 3625, titanium seamless tube) |
| 🇬🇧 BS | TA2 / IMI 125 |
| 🇷🇺 GOST | BT1-0 |
| AFNOR | T40 |
化学成分
| 元素 | 数值 |
|---|---|
| Ti | ≥ 99.0 (balance) |
| N | ≤ 0.03 |
| C | ≤ 0.10 |
| H | ≤ 0.015 |
| Fe | ≤ 0.30 |
| O | ≤ 0.25 |
| Y | ≤ 0.005 |
| Residuals (each) | ≤ 0.10 |
| Residuals (total) | ≤ 0.40 |
机械性能
| productCenter.property | 数值 |
|---|---|
| Tensile Strength Rm | ≥ 345 MPa (50 ksi) |
| 0.2% Yield Strength Rp0.2 | ≥ 275 MPa (40 ksi) |
| Elongation A (50 mm) | ≥ 20% |
物理性能
| 性能 | 单位 | 数值 |
|---|---|---|
| Density | g/cm³ | 4.51 g/cm³ (0.163 lb/in³) — ~56% the weight of steel, ~60% heavier than aluminum |
| Melting Point | °C | 1,660 ± 10 °C (3,020 °F) |
| Modulus of Elasticity E | GPa | 105 GPa (15.2 × 10⁶ psi) |
| Shear Modulus G | - | 42 – 45 GPa |
| Poisson's Ratio | - | 0.34 – 0.37 |
| Thermal Conductivity (20°C) | W/m·K | 17 – 21.9 W/(m·K) |
| Thermal Expansion (20–100°C) | ×10⁻⁶/K | 8.6 ppm/°C (4.8 ppm/°F) — ~½ of stainless steel; close to carbon steel |
| Specific Heat Capacity | J/kg·K | 0.523 J/(g·K) at 20°C |
| Electrical Resistivity | μΩ·cm | 0.55 – 0.58 μΩ·m |
| Electrical Conductivity | - | ~3% IACS |
| Magnetism | - | Non-magnetic (paramagnetic) |
| Flammability | - | Burns in pure oxygen at elevated temperatures → avoid O₂ service without inert shielding |
应用场景
- Power Generation
- Chemical Processing
- Desalination (MSF / MED / RO)
- Offshore / Subsea
- HVAC & Refrigeration
- Marine
- Oil & Gas
- Pulp & Paper
- Food & Beverage
- Pharmaceutical / Biotech
- Aerospace
- Medical
- Cryogenic Storage