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ASTM A249 is a standard specification that covers welded austenitic steel boiler tubes. These tubes are primarily used in the construction of heat exchangers, condensers, and similar applications where high-temperature and high-pressure conditions are prevalent. The specification ensures that the materials used can withstand the demanding environments typically found in power generation and chemical processing industries.
The material used in ASTM A249 welded austenitic steel boiler tubes is primarily stainless steel. The austenitic structure provides excellent corrosion resistance and high-temperature strength, making it suitable for various applications.
The ASTM A249 specification outlines the requirements for the manufacturing process, dimensions, and tolerances of the welded tubes. It also includes guidelines for testing and inspection to ensure the quality and performance of the tubes.
The chemical composition of ASTM A249 welded austenitic steel boiler tubes is critical for their performance. Below is a table summarizing the typical chemical composition of these tubes.
| Element | Composition (%) |
|---|---|
| Carbon (C) | ≤ 0.08 |
| Manganese (Mn) | 2.00 max |
| Phosphorus (P) | 0.045 max |
| Sulfur (S) | 0.030 max |
| Silicon (Si) | 0.75 max |
| Chromium (Cr) | 16.00 - 26.00 |
| Nickel (Ni) | 8.00 - 22.00 |
| Molybdenum (Mo) | 0.00 - 7.00 |
The mechanical properties of ASTM A249 welded austenitic steel boiler tubes are essential for their performance under stress and temperature. The following table presents the typical mechanical properties of these tubes.
| Property | Value |
|---|---|
| Yield Strength (MPa) | 205 min |
| Tensile Strength (MPa) | 515 min |
| Elongation (%) | 40 min |
| Hardness (Rockwell) | B70 max |
ASTM A249 welded austenitic steel boiler tubes are widely used in various applications, including:
These applications benefit from the high strength, durability, and resistance to oxidation and corrosion provided by the austenitic steel composition.
A: manufacturer,also can do trading.
A: Generally speaking,it is 10-15 days if the goods are in stock,or it is 30-40 days if the goods are not in stock, it is according to quantity.
A: Yes, we could offer the sample for free charge but need pay the cost of freight.
A: Payment<=2000USD, 100% in advance. Payment>=2000USD, 30% T/T in advance ,balance before shippment.
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