ASME SB861 Titanium Alloy Seamless Pipes
The ASME SB861 standard applies to a wide range of grades of seamless titanium and titanium alloy tubing, which are primarily intended for general corrosion resistance and high-temperature service. The standard lists various grades of titanium alloys such as Grade 1 (unalloyed low-oxygen titanium), Grade 2 (unalloyed standard-oxygen titanium), Grade 3 (unalloyed medium-oxygen titanium), and Grade 5 (titanium alloy with 6% aluminium and 4% vanadium), as well as grades for more specific alloy compositions.
High level ASME SB861 titanium tube production technology
Titanium Tube Properties (Theoretical)
| Molecular Weight | 47.86 (Note: all properties listed are for bulk titanium metal) |
|---|---|
| Appearance | Silvery |
| Melting Point | 1668 °C |
| Boiling Point | 3560 °C |
| Density | 4.54 g/cm3 |
| Solubility in H2O | N/A |
| Crystal Phase / Structure | Hexagonal |
| Electrical Resistivity | 42.0 microhm-cm @ 20 °C |
| Electronegativity | 1.45 Paulings |
| Heat of Fusion | 14.15 kJ/mol |
| Heat of Vaporization | 425 kJ/mol |
| Poisson's Ratio | 0.32 |
| Specific Heat | 0.125 Cal/g/K @ 25 °C |
| Tensile Strength | 140 MPa |
| Thermal Conductivity | 21.9 W/(m·K) @ 298.2 K |
| Thermal Expansion | 8.6 µm·m-1·K-1 (25 °C) |
| Vickers Hardness | 830–3420 MPa |
| Young's Modulus | 116 GPa |
Application Areas
ASME SB861 Titanium Seamless Tubes are used in a wide range of applications due to their excellent corrosion resistance and high temperature properties. Initially, these seamless tubes were used primarily for aircraft engine compressor components and structural parts for rockets, missiles and high-speed aircraft. Over time, their applications have expanded to include electrodes for the electrolysis industry, condensers for power stations, heaters for petroleum refining and seawater desalination, and general industrial manufacturing such as environmental pollution control devices.
ASME SB861 titanium seamless pipe testing before shipment
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