S-TEN1 inside the chimney of a power plant or incineration facility.
S-TEN1 / Japan Steel Works brand sulfuric acid dew point corrosion-resistant steel
Measures against sulfuric acid and hydrochloric acid dew point corrosion of long inner tubes cooled by outside air. Confirmation of specifications and welds.
The inner tube of the chimney is susceptible to external environmental influences, and when the exhaust gas temperature drops or falls below the acid dew point during operation stoppage, localized thinning due to condensed sulfuric and hydrochloric acid can occur. Due to its long structure, material selection must consider not only corrosion allowance but also self-weight, wind and seismic loads, joints, and inspection and renewal methods. In the case of Nippon Steel's application, S-TEN1 with a nominal plate thickness of 6 to 12 mm is indicated for the inner tube of the chimney. S-TEN1 thick plates are designed to meet the mechanical properties of SM400A, but if JIS compliance is to be noted on the mill sheet for applications related to public works or building codes, prior specification before ordering is necessary. Dedicated welding materials, vertical and circumferential joints, drains, insulation, and inspection openings will be considered as a whole.
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basic information
- I want to improve the reduction of thickness, holes, and repair cycles in the chimney inner tube. - I want to confirm the plate thickness, JIS compliance markings, and mill sheet conditions for S-TEN1. - I would like to discuss cutting, bending, beveling, and welding fabrication of long materials. Main candidate: S-TEN1. Standard plate thickness is 1.6 to 12 mm. The example plate thickness for the chimney inner tube in the catalog is 6 to 12 mm. Please confirm structural safety, corrosion allowance, service life, requirements for construction and public works, and welding construction and inspection conditions with the designer. 【Basic Information】 1. Main specifications and characteristics - Steel type classification: Acid-resistant steel plate for sulfuric acid and hydrochloric acid dew point corrosion - Representative grades: S-TEN1 / S-TEN2 - Corrosion resistance: Suitable for sulfuric acid and hydrochloric acid dew point corrosion - S-TEN2 has enhanced corrosion resistance at high temperatures compared to S-TEN1 2. Features of processing and construction - Good weldability, cutability, and bendability - Compatible with gas and laser cutting - Reduces processing costs compared to stainless steel 3. Points for material selection - Stainless steel can be substituted in dew point corrosion environments - Total cost reduction including initial costs and processing fees - Contributes to the longevity of equipment and reduction of maintenance costs
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※Kumagai Special Steel has the number one inventory of S-TEN steel and has a system for immediate delivery, including cutting and processing, so it usually takes about a week depending on the lot. Additionally, for special specifications or large lots, it may take longer. Please contact us by email or phone for inquiries!
Applications/Examples of results
S-TEN steel is a corrosion-resistant steel plate designed to withstand sulfuric acid and hydrochloric acid dew point corrosion environments, and it has a proven track record under severe corrosion conditions. It is highly regarded for maintaining workability similar to ordinary steel while achieving both extended equipment lifespan and cost reduction. 1. Main Applications and Practical Examples - Flue gas treatment equipment: ducts, pipes, dust collectors - Chemical equipment: pickling tanks, reaction vessels, piping components - Environmental equipment: incinerator auxiliary equipment, exhaust gas treatment devices - Energy-related: boiler peripheral equipment, support structures - Industrial equipment: structural components requiring corrosion resistance 2. Evaluation Points in Practical Use - High corrosion resistance against sulfuric acid and hydrochloric acid dew point corrosion - Reduction in material and processing costs by substituting stainless steel - Easy construction with welding and workability equivalent to ordinary steel 3. Expected Future Market Areas - Demand for updating aging environmental and exhaust gas equipment - Plant equipment focusing on cost optimization - Industrial infrastructure sectors seeking long lifespan and low maintenance S-TEN steel is expected to see expanded adoption in fields where both corrosion resistance and economic efficiency are required.
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S-TEN Steel Application Examples
Line up（1）
| Model number | overview |
|---|---|
| S-TEN1 (a standard grade of sulfuric acid and hydrochloric acid dew point corrosion-resistant steel sheet developed by Nippon Steel Corporation) | This is a steel material with excellent dew point corrosion resistance in normal to medium temperature environments (below approximately 300°C). It is designed to meet the mechanical properties equivalent to SM400A of JIS G3106 under JIS standards, exhibiting processing and weldability comparable to ordinary steel while demonstrating strong resistance to acid and gas dew point corrosion. |
catalog（2）
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Company information
**Expanding Our Global Steel Business!** We support both **CIF and EX Works (EXW)** terms. **Delivering Japanese Specialty Steel to the World.** Since our establishment in 1913, we have been a specialized trading company of special steel for nearly a century, listening to the needs of many customers and building an ideal relationship between customers and steel manufacturers as a conductor of steel distribution. As a trading company with various processing equipment, including cutting machines and laser cutting machines, we also contribute to reducing our customers' capital investment. Please feel free to contact us if you have any requests.
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