253 MA stainless steel excels in both performance at elevated temperatures and ease of fabrication, making it a versatile grade.
Low austenitic stainless steel 253 MA has exceptional oxidation resistance and excellent strength. 253 MA stainless steel keeps its heat-resistant capabilities.
Up to 2000°F, rare earth metals combined with silicon provide outstanding oxidation resistance.
This grade of stainless steel is also known as UNS S30815.
Because its relatively low nickel content, 253 MA offers an advantage in mitigating sulfide atmospheres, distinguishing it from high nickel alloys and grade 310.
With its high silicon, nitrogen, and cerium content, this steel exhibits remarkable oxide stability, elevated temperature strength, and exceptional resistance to sigma phase precipitation.
253 MA® is the registered trademark of Outokumpu Stainless AB.
History of 253 MA Stainless Steel
In the 1970s, the Avesta Stainless research center in Sweden, which is now known as Outokumpu Stainless AB, initiated the development of 253 MA alloy.
The primary objective back then was to create a heat-resistant stainless steel that matched or exceeded the characteristics of 310 stainless steel (UNS S31008) while using fewer alloy components.
What Grade is 253 MA Equivalent to?
| GRADE | UNS NO | ASTM/AISI | DIN | JIS |
| 253 MA | S30815 | 253 MA | 1.4835 | SUS253MA |
Products Types of 253 MA Stainless Steels
- 253 MA Stainless Steel Pipe
- 253 MA Stainless Steel Strip & Foil
- 253 MA Stainless Steel Sheet & Plate
- 253 MA Stainless Steel Bar
- 253 MA Stainless Steel Custom Part
Chemical Compositions of 253 MA Stainless Steels
The chemical components of grade 253 MA stainless steel is summarized in the following table:
| Grade | Standard | C | Si | Mn | P | S | Cr | Ni | Ce |
| 253 MA (UNS S30815) | ASTM | ≤0.10 | ≤2.00 | ≤0.80 | ≤0.040 | ≤0.030 | 20.00-22.00 | 10.00-12.00 | 0.03-0.08 |
Mechanical Properties of 253 MA Stainless Steels
| Grade | Tensile Strength (MPa) min. | Yield Strength 0.2% Proof (MPa) min. | Elongation | Hardness (HR B) max. |
| 253 MA (UNS S30815) | 600 | 310 | 40% | 95 |
253 MA Stainless Steel Applications
Due to high creep strength, heat resistance and good corrosion resistance, quality grade 253 MA stainless steels are widely used for below applications.
- Sintering equipment
- Blast furnace equipment
- Steel melting
- Furnace and continuous casting equipment
- Rolling mill (heating furnace)
- Heat treatment furnace and accessories
- Mineral equipment and cement production equipment
- Non-pressure high temperature parts
Which one between Grade 254SMO Stainless Steel and Grade 253MA Stainless Steel is better?
The grade 254 SMO stainless steel has excellent resistance to crevice and pitting corrosion, cracking corrosion and stress chloride corrosion.
All these properties are shown by grade 254 SMO due to adding more nickel and molybdenum contents in its composition.
Therefore grade 254 SMO maintains its quality under such conditions better than grade 253 MA stainless steel.
Conclusion
In Conclusion, 253MA is a grade combining excellent service properties at high temperatures with ease of fabrication.
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