The ASTM A213 specification covers seamless ferritic and austenitic alloy-steel boiler tubes designed for high-temperature applications. These tubes are widely used in boilers, superheaters, and heat exchangers in various industries such as power, petrochemical, and refineries.
| Element | Composition (%) |
|---|---|
| Carbon | 0.05 - 0.15 |
| Manganese | 0.30 - 0.60 |
| Phosphorus | 0.025 max |
| Sulfur | 0.025 max |
| Silicon | 0.50 - 1.00 |
| Chromium | 4.00 - 6.00 |
| Nickel | 0.15 - 0.60 |
| Property | Value |
|---|---|
| Tensile Strength | 415 MPa min |
| Yield Strength | 205 MPa min |
| Elongation | 30% min |
| Hardness | 179 HRB max |
The ASTM A213 specification includes various steel grades depending on the specific application requirements. Common grades include T11, T22, T91, and T9, among others.
These seamless alloy-steel boiler tubes find applications in:
While ASTM A213 offers a range of alloy steel grades suitable for specific applications, alternative grades that can be considered include:
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