309S Stainless Steel Welded Pipe
309S stainless steel welded pipe has a high chromium and nickel content, excellent high-temperature resistance, and can withstand temperatures up to 1000℃ for extended periods. It also exhibits strong resistance to high-temperature oxidation and thermal fatigue. Combining good corrosion resistance and weldability, it is not prone to deformation and cracking in high-temperature environments. Leading Chinese stainless steel welded pipe manufacturers recommend 309S as a suitable choice for medium- and high-temperature industrial pipelines such as high-temperature flues, industrial kilns, and heat treatment equipment.
309S stainless steel welded pipe has a high chromium and nickel content, excellent high-temperature resistance, and can withstand temperatures up to 1000℃ for extended periods. It also exhibits strong resistance to high-temperature oxidation and thermal fatigue. Combining good corrosion resistance and weldability, it is not prone to deformation and cracking in high-temperature environments, making it suitable for medium- and high-temperature industrial pipelines such as high-temperature flues, industrial kilns, and heat treatment equipment.
Comparison Table of 309S and 310S Stainless Steel Welded Pipes
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Comparison Items |
309S |
310S |
|
National Standard Grade |
06Cr23Ni13 |
06Cr25Ni20 |
|
Main Components |
Chromium 23%, Nickel 13% |
Chromium 25%, Nickel 20% |
|
Long-term Operating Temperature |
Maximum 1000℃ |
Maximum 1150℃ |
|
Short-term Limiting Temperature |
1080℃ |
1200℃ |
|
High-Temperature Oxidation Resistance |
Good |
Excellent, far superior to 309S |
|
Thermal Shock Resistance |
Fairly Good |
Stronger, less prone to hot cracking |
|
Corrosion Resistance |
Average |
Stronger, more resistant to acid and alkali corrosion |
|
Processing and Welding Performance |
Easy to weld and process |
Slightly more difficult to weld |
|
Product Price |
Moderately affordable |
Higher price |
|
Applicable Scenarios |
Suitable for high-temperature flues, boiler parts, and hot air ducts |
Industrial furnace tubes, incinerators, high-temperature heat treatment equipment |
|
Service Life |
Durable for medium and high temperature applications |
Longer service life under ultra-high temperature conditions |
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