RA 353 MA
RA 353 MA
RA 353 MA® is a strong, highly oxidation resistant alloy regarded as the upgrade from RA33O0~ for service above 1800 °F. In the steel heat treat industry RA 353 MA is particularly suited for applications involving very high temperatures, with either oxidizing or carburizing atmospheres. Specific examples include copper brazing and P/M sintering muffles, radiant tubes for carburizing furnaces and forge furnace components.
Because of its high chromium content, RA 353 MA has excellent hot corrosion resistance under oxidizing conditions, being advantageous for recuperators and tube shields at temperatures as low as 1400 °F. The erosion-corrosion resistance of RA 353 MA is important for applications such as cyclones in fluidized bed combustors.
To maximize the performance of RA 353 MA fabrications it is important to weld with matching RA 353 MA weld filler. RA 353 MA DC basic electrodes and bare wire are a close match for both the oxidation resistance and the high melting point of the base metal.
Applications
- Heat treating muffles, retorts
- Waste fired boiler tube shields
- Furnace radiant heating tubes
- Cyclones in PFBC
- Burners
- Kilns
- Dampers, gate valves
Specifications
- ASTM A 240, A480, A312
- UNS S35315
| Nominal Chemical Composition (%) | ||||||||
|---|---|---|---|---|---|---|---|---|
| Cr | Ni | Mo | Co | W | Si | Mn | C | Fe |
| 28.00 | 34.00 | – | – | – | 0.7 | 1.7 | 0.03 | 35.00 |
| Typical Mechanical Properties | |||
|---|---|---|---|
| Tensile Strength | Yield Strength 0.2% | Elongation | Hardness |
| 98,000 psi | 43,000 psi | 50% | 82 Rb |