Selection of steel materials for industrial machinery and plant components operating at 300 to 450℃.
JIS G 3103 SB410 SB450 SB480, etc.
You can't choose based solely on room temperature strength. Consider the material taking into account high-temperature softening, structural changes, and usage time.
In heating equipment and heat treatment facilities, as well as in industrial machinery that handles hot materials, the temperature of steel can reach around 300 to 450°C. In this temperature range, the strength of ordinary steel significantly decreases, and material changes due to prolonged exposure cannot be ignored. We will compare carbon steel, alloy steel, and high-strength steel based on the actual steel temperature and load conditions. At around 300 to 450°C, materials containing Cr and Mo may be advantageous in suppressing high-temperature softening. Candidates include SB450M, SB480M, SCM series steels, and specially designed high-strength steels, but even within the same strength class, high-temperature performance can vary. It is essential to check the atmosphere, oxidation, stress, operating time, and number of heating and cooling cycles, and to select materials based on manufacturer data and applicable standards.
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basic information
If you are experiencing the following issues with the use of steel materials at high temperatures, please contact Kumagai Special Steel! - I want to review the causes of softening and deformation of components during operation from a material perspective. - I would like to consult on which material to choose among ordinary steel, SB materials, SCM materials, and high-tensile steel. - I want to procure cut plates, machined products, and welded components for high-temperature applications all at once. Consideration of steel materials: SB410 to SB480M, SCM series steel, high-tensile steel for specific applications, and other Cr and Mo alloyed steels. The temperature range is a guideline; please check the guaranteed values, allowable stress, and heat treatment history for each steel type. We will propose the above-mentioned steel materials and support subsequent processing (cutting, drilling, surface machining, bending, welding, etc.).
Price range
Delivery Time
P3
※Kumagai Special Steel has an immediate delivery system centered around SB410, including cutting and processing, so it takes about a week depending on the lot. However, for more specialized specifications or large lots, it may take longer. Please contact us by email or phone for inquiries!!
Applications/Examples of results
The following is an explanation of the applications and practical examples of SB materials (SB410, SB450, SB480). Boiler and pressure vessel steel plates are designed for equipment that requires safety and reliability under high temperature and high pressure conditions. They are manufactured under strict standard management and are adopted as core materials supporting various plants and energy-related equipment. 4. Main Applications and Practical Examples - Power generation equipment: Boiler bodies, drums, piping components - Chemical plants: Pressure vessels, reaction tanks, storage tanks - Thermal-related equipment: Heat exchangers, heating furnace components - Energy sector: Oil and gas-related equipment - Industrial equipment: Structures for high temperature and high pressure applications 5. Evaluation Points in Practical Use - Stable mechanical performance under high temperature and high pressure - High safety based on strict standards - Suitable for welded structures, compatible with equipment fabrication 6. Expected Future Market Areas - Renewal and enhancement of energy infrastructure - Hydrogen and ammonia-related equipment - Longevity and safety improvements for plants - Industrial equipment sector aiming for high efficiency Boiler and pressure vessel steel plates are expected to maintain stable demand as important materials, primarily in the energy and plant sectors, based on safety and durability.
Detailed information
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This is a graph showing the differences in allowable tensile stress for SB materials of types SB410, SB480, and SB480M.
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This is a graph showing the differences in allowable tensile stress of steel materials at higher temperatures, beyond the scope of SB materials. - JIS G4109 SCMV material - JIS G4312 SUS310S-HR - JIS G4902 NCF800HP
Line up（4）
| Model number | overview |
|---|---|
| SB480 (carbon steel plate with high strength (480-620 MPa grade)) | Selected for conditions with high design loads and pressures. As strength increases, attention to welding conditions and processing management becomes important. |
| JIS G4109 SCMV material | It is a low-alloy heat-resistant steel used in high-temperature and high-pressure environments, such as boilers in thermal power plants and desulfurization reaction towers in oil refining plants. It exhibits excellent high-temperature strength and environmental resistance in the temperature range of approximately 350°C to 600°C, exceeding the usage limit of carbon steel (about 350°C to 400°C). |
| JIS G4312 SUS310S-HR | It is a fully austenitic heat-resistant stainless steel of the 25Cr-20Ni system. It boasts significantly higher oxidation resistance and high-temperature creep strength compared to general-purpose austenitic steels (such as SUS304), and can be used in atmospheric (oxidizing) environments without structural stresses other than its own weight to prevent oxidative wear, with a maximum usage temperature of 1,100°C to 1,150°C (although measures against deflection due to its own weight are necessary). |
| JIS G4902 NCF800HP | This is a Fe-Ni-Cr based austenitic heat-resistant superalloy equivalent to Alloy 800H (UNS N08810) according to U.S. standards. It exhibits excellent high-temperature strength, carburization resistance, and oxidation resistance in the high-temperature creep range (approximately 600°C to over 900°C), surpassing the service limits of stainless steels (such as SUS310S), and is applied in critical components of petrochemical plant cracking furnaces, reforming furnaces, power plants, and nuclear-related equipment. |
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Company information
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.
