ASME SA213 T9 High Frequency Welded Finned Tubes are specially designed for boiler heat transfer systems where high-temperature strength, oxidation resistance, and efficient heat recovery are required. Manufactured with ASTM/ASME SA213 T9 alloy steel base tubes and high-frequency welded fins, these tubes provide excellent thermal performance and long-term operating reliability under demanding boiler conditions.

SA213 T9 is a chromium-molybdenum alloy steel grade containing approximately 9% chromium and 1% molybdenum, offering superior resistance to high-temperature oxidation and creep compared with conventional carbon steel boiler tubes. The material is widely selected for high-temperature heat recovery equipment, including boiler economizers, waste heat boilers, and other thermal energy recovery systems.

Through advanced high-frequency resistance welding technology, the fins are firmly bonded to the tube surface, ensuring efficient heat transfer, strong mechanical integrity, and reliable performance during continuous operation with high-temperature flue gas.

Product Features

1. Excellent High-Temperature Performance

ASME SA213 T9 alloy steel provides improved thermal stability and oxidation resistance compared with carbon steel tubes. It is suitable for applications involving elevated temperature flue gas and continuous heat exchange.

2. Strong Fin-to-Tube Bonding

The high-frequency welded fin structure creates a durable metallurgical bond between fins and tubes, reducing thermal resistance and maintaining heat transfer efficiency throughout the service life.

3. Enhanced Heat Transfer Efficiency

Compared with plain tubes, finned tubes significantly increase external heat transfer area, allowing boiler systems to achieve higher thermal efficiency while reducing equipment size.

4. Suitable for Severe Operating Conditions

SA213 T9 finned tubes are commonly used in systems requiring:

High-temperature operation
Long service life
Resistance to oxidation
Stable heat recovery performance

Common Applications

ASME SA213 T9 High Frequency Welded Finned Tubes are commonly used in:

Boiler Economizers
Waste Heat Boilers
HRSG (Heat Recovery Steam Generator)
Power Generation Boilers
Petrochemical Heat Recovery Systems
Industrial Heat Recovery Equipment
High-Temperature Heat Exchangers

Chemical Composition (ASME SA213 T9)

Element	Composition (%)
Carbon (C)	0.15 max
Manganese (Mn)	0.30 – 0.60
Phosphorus (P)	0.025 max
Sulfur (S)	0.025 max
Silicon (Si)	0.25 – 1.00
Chromium (Cr)	8.00 – 10.00
Molybdenum (Mo)	0.90 – 1.10

Mechanical Properties

Property	Requirement
Tensile Strength	≥ 415 MPa
Yield Strength	≥ 205 MPa
Elongation	≥ 30%

Tags:

Studded Tube

Solid Fin Tube

Serrated Finned tube

Embedded G Fin Tube

Extruded Fin Tube

Wound Fin Tube

Low Fin Tube

Square Fin Tube

Longitudinal Finned Tube

Enhanced Heat Transfer Tube

Fin Tube Support

Return Bend

Heat Exchanger Tube

Stainless Steel Heat Exchanger Tube

Duplex Stainless Steel Heat Exchanger Tube

Super Duplex Stainless Steel Heat Exchanger Tube

Nickel Alloy Steel Heat Exchanger Tube

Copper Alloy Steel Heat Exchanger Tube

Titanium Alloy Steel Heat Exchanger Tube

Alloy Steel Heat Exchanger Tube

U Bend Heat Exchanger Tube

Carbon Steel Heat Exchanger Tubes

Boiler Tube

Nickel Alloy Steel Boiler Tube

Stainless Steel Boiler Tube

Duplex Stainless Steel Boiler Tube

Alloy Steel Boiler Tube

Carbon Steel Boiler Tube

Fired Heater Parts

Baffle Plate

Tubesheet

Studded Tube

Solid Fin Tube

Serrated Finned tube

Embedded G Fin Tube

Extruded Fin Tube

Wound Fin Tube

Low Fin Tube

Square Fin Tube

Longitudinal Finned Tube

Enhanced Heat Transfer Tube

Fin Tube Support

Return Bend

Heat Exchanger Tube

Stainless Steel Heat Exchanger Tube

Duplex Stainless Steel Heat Exchanger Tube

Super Duplex Stainless Steel Heat Exchanger Tube

Nickel Alloy Steel Heat Exchanger Tube

Copper Alloy Steel Heat Exchanger Tube

Titanium Alloy Steel Heat Exchanger Tube

Alloy Steel Heat Exchanger Tube

U Bend Heat Exchanger Tube

Carbon Steel Heat Exchanger Tubes

Boiler Tube

Nickel Alloy Steel Boiler Tube

Stainless Steel Boiler Tube

Duplex Stainless Steel Boiler Tube

Alloy Steel Boiler Tube

Carbon Steel Boiler Tube

Fired Heater Parts

Baffle Plate

Tubesheet

products details

Studded Tube

Solid Fin Tube

Serrated Finned tube

Embedded G Fin Tube

Extruded Fin Tube

Wound Fin Tube

Low Fin Tube

Square Fin Tube

Longitudinal Finned Tube

Enhanced Heat Transfer Tube

Fin Tube Support

Return Bend

Heat Exchanger Tube

Stainless Steel Heat Exchanger Tube

Duplex Stainless Steel Heat Exchanger Tube

Super Duplex Stainless Steel Heat Exchanger Tube

Nickel Alloy Steel Heat Exchanger Tube