347H Stainless Steel Pipes UNS S34709
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S34709 steel pipe is a chromium-nickel-titanium stabilized stainless steel containing 17% to 19% chromium and 9% to 13% nickel. In addition, it has added titanium to improve its corrosion resistance. This kind of steel has good high temperature resistance and can maintain a stable structure in high temperature environments of 800°C to 900°C.
In these fields, 347H stainless steel pipes are often used to manufacture corrosion-resistant, high-temperature-resistant equipment and pipes.
S34709 stainless steel cold drawn pipe has good processability and can be processed through cold working, hot working and heat treatment. Cold working mainly includes forging, machining, cold drawing and cold rolling, etc.; hot working mainly includes forging, hot rolling and hot extrusion. In addition, heat treatment can be used to process S34709 seamless pipes through annealing, normalizing and quenching to adjust its structure and properties.
Stainless Steel UNS S34709 Pipes Equivalent Grades
| Grade | 347H | |
| UNS No | S34709 | |
| Old British | BS | – |
| En | – | |
| Euronorm | No | 1.4961 |
| Name | – | |
| Swedish SS | – | |
| Japanese JIS | SUS 347H | |
S34709 UNS Pipes Chemical Composition
| Grade | UNS S34709 | |
|---|---|---|
| min | max | |
| C | 0.04 | 0.10 |
| Mn | – | 2.0 |
| Si | – | 1.00 |
| P | – | 0.045 |
| S | – | 0.030 |
| Cr | 17.0 | 19.0 |
| Mo | 3.00 | 4.00 |
| Ni | 9.0 | 13.0 |
| N | – | – |
Stainless Steel 347H Hollow Pipe
1. What is the corrosion resistance of S34709?
UNS S34709 Seamless Pipes have good corrosion resistance and can resist erosion by a variety of acid, alkali and salt media. Especially in high temperature environments, its corrosion resistance is more outstanding.
2. What is the high temperature stability of S34709?
UNS S34709 Fabricated Pipes have good high temperature stability and can maintain good structural stability and mechanical properties in high temperature environments from 800°C to 900°C.
3. What is the welding performance of S34709?
Stainless Steel UNS S34709 Pipes have good welding properties and can be welded using conventional welding methods. However, attention needs to be paid to controlling the welding temperature and atmosphere during the welding process to prevent welding defects and structural changes.
4. How to solve the bainite transformation problem of S34709?
S34709 is prone to bainite transformation at high temperatures, thereby reducing its performance and corrosion resistance. To solve this problem, it can be done by adding stabilizing elements or controlling the heating and cooling rates to reduce the bainitic transformation.
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