ASME SB338 GR.7 Titanium Alloy Seamless Tube Cold Drawn For Heat Exchanger
We are one of the largest stainless steel, duplex and alloy steel pipe manufacturers in China. After more than 20 years of development, we have accumulated many customers all over the world, and Yuhong products have also won unanimous praise from customers.
ASME SB338 is a Standard Specification for Seamless and Welded Titanium and Titanium Alloy Tube or Tubing for Surface Condensers, Evaporators, and Heat Exchangers. It is the same as ASTM B338 with some minor differences in product marking. There are 28 grades of titanium and titanium alloys used for pipe, with titanium grades 2, 7 and 12 being the most common in pipe applications.
Grade 7 titanium tubing is mechanically and physically identical to CP 2 grade titanium, but due to the addition of palladium to grade 7 titanium, it is the most corrosion resistant of all titanium alloys. Grade 7 titanium tubes are widely used in heat exchange equipment such as tubular heat exchangers, coil heat exchangers, serpentine heat exchangers, condensing evaporators and conveying pipes. Many nuclear power industries use grade 7 titanium tubing as the standard tube for their equipment.
Titanium seamless tubes shall be made from hollow billets by any cold drawing or cold rolling process, with a continuous perimeter at all stages of the manufacturing operation. Titanium welded pipes shall be made from annealed flat rolled sheets by automatic arc welding or other welding processes.
ASME SB338 GR.7 CHEMICAL COMPOSITION
| Element | Ti Alloy Gr.7 |
| C | 0.08 max |
| Fe | 0.30 max |
| Ti | Bal |
| H | 0.015 max |
| Pd | 0.12 - 0.25 |
| O | 0.25 max |
| Al | - |
| N | 0.03 max |
ASME SB338 GR.7 MECHANICAL PROPERTIES
| Element | Titanium Alloy Gr7 |
| Density | 0.163 lb/in3 |
| Tensile Strength | 50 |
| Yield Strength (0.2%Offset) | 40/65 |
| Elongation | 20% |
ASME SB338 GR.7 PHYSICAL PROPERTIES
| Beta Transus (F ± 25) | 1675 |
| Coefficient of Thermal Expansion (10-6in./in./F) | 32-212 | 4.8 |
| 32-600 | 5.1 |
| 32-1000 | 5.4 |
| 32-1200 | 5.6 |
| 32-1500 | 5.6 |
| Density (lbs./cu. in.) | 0.163 |
| Melting Point, Approx (F) | 3020 |
| Electrical Resistivity at Room Temp. (Microhms cm) | 56 |
| Modulus Elasticity – Tension (106 psi) | 14.9 |
| Modulus Elasticity – Torsion (106 psi) | 6.5 |
| Thermal Conductivity | 9.5 at Room Temperature |
| (Btu/hr/sq. ft./F/ft.) |
| Specific Heat (Btu/lb./F) at Room Temp. | 0.124 |
| Weldability | Good |
| Annealing Temp. (F) | Full | 1300°/30 Min. – 2 Hrs,; Air Cool |
| Stress Relief | 1000-1100°/30 Min.; Air Cool |
| Forging* Temp. (F) | Blocking | 1600-1700° |
| Finishing | 1500-1600° |
| Available Mill Products | Tube, Tubing |
| Typical Application | For corrosion resistance in the chemical industry where media is mildly reducing |
| or varies between oxidizing and reducing. |
| Industry Specifications | ASTM |
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| F338 Grade 7 |
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Complete titanium tube production system, from smelting to finished tube production. YUHONG GRUOP has modern production equipment, 20 various rolling mills, 3 vacuum annealing furnaces (effective length up to 18.5 meters), 2 2 ton vacuum consumables melting furnaces and 3 ton vacuum consumables melting furnaces, 1 extruder 2000 tons, 1 hydraulic press 3000 tons. The company has complete quality inspection equipment, equipped with metallographic chemical analyzer, hydrogen, oxygen, nitrogen analyzer and ordinary wire drawing machine, testing machine, hydraulic pneumatic testing machine, hardness tester, eddy current, ultrasonic flaw detection equipment.
Application
- Food Processing Industry
- Fabrication Industry
- Oil and Gas Industry
- Chemical Industry
- Plumbing
- General Purpose Applications
- Heating
- Water Supply Systems
- Power Plant
- Paper and Pulp Industry
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ASME SB338 GR.7 Titanium Alloy Seamless Tube Cold Drawn For Heat Exchanger Images
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