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Model No: 253 MA
UNS S30815 / 1.4835 / 253 MA Stainless Steel
Stainless 253 MA is a lean austenitic heat resistant alloy with high strength and outstanding oxidation resistance. 253 MA maintains its heat resistant properties by advanced control of micro alloy additions.
Delivery :
FOB
minimum order :
100 kilograms
Supply Ability :
5000Tonkilograms / Month
Stock Time :
7-10Day
Country of Origin :
CHINA
Quantity :
Stainless 253 MA is a lean austenitic heat resistant alloy with high strength and outstanding oxidation resistance. 253 MA maintains its heat resistant properties by advanced control of micro alloy additions. The use of rare earth metals in combination with silicon gives superior oxidation resistance up to 2000°F. Nitrogen, carbon and a dispersion of rare earth and alkali metal oxides combine to provide creep rupture strength comparable to the nickel base alloys.
Despite its lean nickel content, 253 MA stainless steel offers an outstanding combination of creep strength and high resistance to oxidation, sulphidation and erosion/abrasion at extremely high temperatures. This makes the alloy more economical than most heat resistant alloys.
Chemical Composition, %
| Cr | Ni | C | Si | Mn | P | S | N | Ce | Fe |
|---|---|---|---|---|---|---|---|---|---|
20.0-22.0 | 10.0-12.0 | 0.05-0.10 | 1.40-2.00 | 0.80 Max | 0.040 Max | 0.030 Max | 0.14-0.20 | 0.03-0.08 | Balance |
The high heat resistant properties of 253 MA are obtained by the tight control of micro alloy additions. Whilst the benefit of creep rupture strength is down to the combination of nitrogen, carbon and cerium, its superior oxidation resistance is a result of the combination of cerium and silicon.
Features
- Oxidation resistance to 2000°F (1093°C)
- Good resistance to sulfidation
- Superior strength at elevated temperatures
- Good resistance to high temperature abrasion
Mechanical Properties
| Mechanical Properties | 50⁰C | 100⁰C | 200⁰C | 300⁰C | 400⁰C | 500⁰C | 600⁰C | 700⁰C | 800⁰C | 850⁰C | 900⁰C |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Ultimate Tensile Strength/ MPa | 663.3 | 621.9 | 577.8 | 568.1 | 549.5 | 522 | 475.7 | 386.1 | 388.9 | 254.4 | 171 |
| 0.2% Yield Strength / MPa | 304.8 | 271 | 222 | 202 | 200.6 | 173.1 | 166.9 | 158.6 | 148.2 | 100.7 | 80 |
| Reduction of area / % | 51 | 48 | 46 | 46 | 46 | 44 | 43 | 44 | - | - | - |
| Elongation / % | 68 | 65 | 65 | 64 | 60 | 62 | 63 | 58 | 76 | 88 | 92 |
Applications
- Burners, Boiler Nozzles
- Petrochemical and refinery tube hangers
- Heat exchangers
- Expansion bellow
- Stack dampers
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