ASTM A213 T5 Alloy Steel Tubes for Boiler Heat Exchanger Application
The manufacturing process of ASTM A213 T5 alloy steel heat exchanger tube mainly includes steps such as raw material preparation, hot rolling (or cold drawing), heat treatment, inspection, and surface treatment. The standard for its manufacturing execution is ASTM A213/A213M "Specification for Seamless Iron and Austenitic Alloy Steel Tubes for Boilers, Superheaters, and Heat Exchangers", and the product also needs to comply with the requirements of TSG D7002 Pressure Pipeline Component Type Test Rules.
ASTM A213 T5 Alloy Steel Tube Chemical Composition
| UNS NO. | ASTM A213/ASME SA213 T5 CHEMICAL COMPOSITION % |
| C | MN | P | S | SI | CR | MO |
| K41545 | 0.15 | 0.3-0.6 | 0.025 | 0.025 | 0.50 | 4.00-6.00 | 0.45-0.65 |
In the chemical composition, Chromium is the core alloying element of T5 alloy steel tube, which increases the ability of T5 alloy tube to resist oxidizing environment such as flue gas and steam, maintains excellent high-temperature oxidation resistance, and in sulfur-containing environment, the corrosion resistance of T5 alloy steel tube is better than that of carbon steel tube; Carbon element can reduce the tendency of carbide precipitation and better balance the strength and weldability of T5 alloy steel tube; Molybdenum element can significantly improve the resistance of T5 alloy steel tube to slow deformation under high temperature constant stress, and improve the high temperature strength and hydrogen corrosion resistance of the tube; Silicon element and manganese element are both deoxidizers, which can increase the high temperature strength and toughness of T5 alloy tube.
ASTM A213 T5 Alloy Steel Key Performance Advantages
ASTM A213 T5 is a ferritic alloy steel, and the matrix microstructure is mainly ferrite. Compared with other austenitic stainless steels such as 304H, 316H, 347H, it has a lower thermal expansion coefficient, can reduce thermal stress, has a higher thermal conductivity, is conducive to heat transfer, and has better resistance to stress corrosion in certain chlorine-containing environments.
- High temperature strength: ASTM A213 T5 alloy steel has stable creep resistance below 540 ° C and can maintain stability in high temperature environments.
- Oxidation resistance: The chromium element contained in ASTM A213 T5 alloy steel forms a dense oxide film, which resists high-temperature oxidation and corrosion.
- Weldability: ASTM A213 T5 alloy steel should be preheated to 150 ° C~200 ° C during welding, and stress relief heat treatment is recommended after welding.
- Economy: Compared to high alloy steels such as T91/T92, ASTM A213 T5 alloy steel has a lower cost and is suitable for medium high temperature environments.
Comparison of ASTM A213 T5 Alloy Steel Tube with Similar Materials
- VS ASTM A213 T2: ASTM A213 T2 alloy offers excellent high-temperature strength and is widely used, with an applicable temperature range of approximately 600°C or less.
- VS ASTM A213 T5: ASTM A213 T5 alloy offers superior oxidation resistance to T2, but its high-temperature strength is comparable to or slightly lower than that of T2. Its applicable temperature range is approximately 650°C or less.
- VS ASTM A213 T9: ASTM A213 T9 offers both higher strength and oxidation resistance than T5, with an applicable temperature range of approximately 650°C or less.
- VS ASTM A213 T91: ASTM A213 T91 is commonly used in modern supercritical power plants. Its high-temperature strength far exceeds that of T5/T9, with an applicable temperature range of approximately 625°C or less.
ASTM A213 T5 Alloy Steel Heat Exchanger Tube Application
- Petrochemical industry: ASTM A213 T5 alloy steel heat exchanger tubes are widely used in the petrochemical industry to transport high-temperature, high-pressure, corrosive media such as oil and gas, steam, chemicals, etc. Its excellent corrosion resistance and high temperature performance enable it to maintain stable performance in harsh working environments.
- Electricity: In the power industry, ASTM A213 T5 alloy steel heat exchanger tubes can be used for high-temperature and high-pressure steam and flue gas pipelines in thermal power plants, nuclear power plants, and other facilities. These pipelines need to withstand extremely high temperatures and pressures, and ASTM A213 T5 alloy pipes, with their excellent high-temperature and high-pressure resistance, can meet these stringent requirements.
- Shipbuilding: In the field of shipbuilding, ASTM A213 T5 alloy steel heat exchanger tubes are also widely used. Ships need to face various complex environmental conditions during navigation, including seawater corrosion, high temperature and pressure, etc. The corrosion resistance and high temperature performance of ASTM A213 T5 alloy steel heat exchanger tubes make them an ideal choice for shipbuilding.
- Metallurgical Machinery: In the fields of metallurgy and machinery, ASTM A213 T5 alloy steel heat exchanger tubes also play an important role. The working environment in these fields often requires extremely high performance of steel pipes, and ASTM A213 T5 alloy steel heat exchanger tubes, with their excellent mechanical properties and corrosion resistance, can meet these requirements and ensure the safe and stable operation of the project.
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