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Alloy UNS S30815 / 253MA Stainless Steel Plate: Heat Resistant Solution for Boilers
Alloy UNS S30815, commonly known as 253MA, is a premium heat-resistant austenitic stainless steel plate engineered for high-temperature applications, particularly in boiler systems. Available in thicknesses of 4.0mm and 5.0mm, this stainless steel combines excellent oxidation resistance, high-temperature strength, and formability, making it a reliable choice for demanding thermal environments.
Chemical Composition
The chemical composition of UNS S30815 (253MA) is carefully balanced to enhance its heat resistance and mechanical properties. Key elements include:
Element
Content (wt%)
Carbon (C)
0.05 - 0.10
Chromium (Cr)
20.0 - 22.0
Nickel (Ni)
10.0 - 12.0
Manganese (Mn)
1.4 - 2.0
Silicon (Si)
0.8 - 1.2
Nitrogen (N)
0.14 - 0.20
Cerium (Ce)
0.03 - 0.08
Phosphorus (P)
≤ 0.030
Sulfur (S)
≤ 0.015
The addition of cerium (a rare earth element) improves oxidation resistance by forming a stable, adherent oxide layer on the surface, while nitrogen enhances high-temperature strength and corrosion resistance.
Mechanical Properties of S30815 Stainless Steel
UNS S30815 (253MA) exhibits impressive mechanical properties, especially at elevated temperatures, which are critical for boiler applications:
These properties remain stable even at temperatures up to 1000°C, ensuring the material can withstand thermal cycling, pressure, and stress in boiler operations.
Product Standards of UNS S30815 Stainless Steel Plate
UNS S30815 (253MA) stainless steel plates are manufactured in compliance with international standards to ensure consistency and quality:
UNS: UNS S30815
EN/DIN: 1.4835
ASTM: Often referenced under ASTM A240/A240M (for chromium-nickel stainless steel plates, sheets, and strips)
Other Specifications: May also conform to customer-specific standards for boiler and pressure vessel applications.
Similar Grades
While UNS S30815 (253MA) is unique in its composition, it is often compared to other heat-resistant stainless steels, including:
310S (UNS S31008): A high-chromium, high-nickel austenitic stainless steel with good oxidation resistance, but lower nitrogen content than 253MA, resulting in slightly lower high-temperature strength.
309S (UNS S30908): Suitable for high-temperature applications but with lower creep strength than 253MA.
1.4828 (316Ti): Offers good corrosion resistance but is less optimized for extreme heat compared to 253MA.
Product Features
UNS S30815 (253MA) stainless steel plates stand out due to the following key features:
Exceptional Oxidation Resistance: The cerium and chromium content forms a protective oxide layer, resisting scaling and corrosion at temperatures up to 1100°C.
High-Temperature Strength: Nitrogen and solid-solution strengthening elements maintain strength and creep resistance under prolonged heat exposure.
Good Formability and Weldability: Can be easily cut, bent, and welded using standard techniques, with minimal post-weld heat treatment required.
Thermal Fatigue Resistance: Handles repeated heating and cooling cycles without cracking, critical for boiler systems.
Applications
Due to its heat resistance and mechanical stability, UNS S30815 (253MA) stainless steel plates are widely used in:
Boiler Systems: Fire tubes, water walls, superheaters, and reheaters, where high temperatures and pressure are present.
Industrial Furnaces: Components such as radiant tubes, furnace liners, and heat exchangers.
Power Generation: Parts in gas turbines, incinerators, and waste-to-energy plants.
Chemical Processing: Equipment exposed to high-temperature corrosive environments.
Company Details
Bronze Gleitlager
,
Bronze Sleeve Bushings
and
Graphite Plugged Bushings
from Quality China Factory
Business Type:
Manufacturer,Distributor/Wholesaler,Exporter
Total Annual:
>1000000
Employee Number:
>100
Ecer Certification：
Verified Supplier
Our company is located in Wuxi City, China, we are a stainless steel plate, seamless steel pipe, round steel, steel belt, decorative pipe and other products distribution wholesale private enterprise. Our company operates stainless steel plate, seamless steel pipe, round steel, steel belt, decorative... Our company is located in Wuxi City, China, we are a stainless steel plate, seamless steel pipe, round steel, steel belt, decorative pipe and other products distribution wholesale private enterprise. Our company operates stainless steel plate, seamless steel pipe, round steel, steel belt, decorative...
