ASTM A213 Cold Drawn Alloy Seamless Steel Tube For Boiler Superheater Heat Exchanger
Product Details
Cold Drawn Alloy Seamless Steel Tube
,Superheater Alloy Steel Tube
,0.4mm Seamless Steel Tube
ASTM A213 Cold Drawn Seamless Alloy Steel Boiler Superheater and Heat Exchanger Tubes
ASTM A213 is a specification for seamless alloy steel tubes, intended for use in boilers, superheaters, and heat exchangers. These tubes are cold drawn and manufactured using high-quality alloy steel, making them suitable for high-temperature applications where strength and corrosion resistance are important factors.
Material
The material used in ASTM A213 tubes is a type of alloy steel that is specifically designed for high-temperature use. The composition of the material includes elements such as chromium, molybdenum, and nickel, which provide excellent corrosion resistance and high-temperature strength.
Specification
The specification for ASTM A213 tubes includes the following requirements:
- Size range: 1/8" - 3" (3.2mm - 76.2mm)
- Wall thickness: 0.015" - 0.500" (0.4mm - 12.7mm)
- Length: 6m - 12m (custom lengths available upon request)
- Heat treatment: annealing, normalizing, or quenching and tempering
- End finish: plain end, beveled end, or threaded end
Chemical Composition
The chemical composition of ASTM A213 tubes varies depending on the grade of steel used. Below is a table of the chemical composition of some of the common grades:
| Grade | Carbon, % | Manganese, % | Phosphorus, % | Sulfur, % | Silicon, % | Chromium, % | Molybdenum, % | Nickel, % |
|---|---|---|---|---|---|---|---|---|
| T2 | 0.10-0.20 | 0.30-0.61 | 0.025 | 0.025 | 0.10-0.30 | 0.50-0.81 | 0.44-0.65 | |
| T5 | 0.15 | 0.30-0.60 | 0.025 | 0.025 | 0.50 max | 4.00-6.00 | 0.45-0.65 | |
| T9 | 0.15 | 0.30-0.60 | 0.025 | 0.025 | 0.25-1.00 | 8.00-10.00 | 0.90-1.10 | |
| T11 | 0.05-0.15 | 0.30-0.60 | 0.025 | 0.025 | 0.50-1.00 | 1.00-1.50 | 0.44-0.65 | |
| T22 | 0.05-0.15 | 0.30-0.60 | 0.025 | 0.025 | 0.50 max | 1.90-2.60 | 0.87-1.13 | |
| T91 | 0.07-0.14 | 0.30-0.60 | 0.020 | 0.010 | 0.20-0.50 | 8.00-9.50 | 0.85-1.05 | 8.00 max |
Mechanical Properties
The mechanical properties of ASTM A213
tubes are also dependent on the steel grade used. The following table provides a summary of the typical mechanical properties of some of the common grades:
| Grade | Tensile strength, MPa | Yield strength, MPa | Elongation, % | Hardness, HB |
|---|---|---|---|---|
| T2 | 415 | 205 | 30 | 163 max |
| T5 | 415 | 205 | 30 | 163 max |
| T9 | 585 | 415 | 20 | 179 max |
| T11 | 415 | 205 | 30 | 163 max |
| T22 | 415 | 205 | 30 | 163 max |
| T91 | 585 | 415 | 20 | 250 max |
Steel Grade
There are several steel grades available in ASTM A213, each with its own unique combination of properties. The most commonly used grades include T2, T5, T9, T11, T22, and T91.
Application
ASTM A213 tubes are widely used in various high-temperature applications, such as boilers, superheaters, and heat exchangers. These tubes are also commonly used in power generation, petrochemical, and oil and gas industries. The combination of high-temperature strength and corrosion resistance makes these tubes suitable for use in harsh environments.
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