ASTM A335 GR.P9 Alloy Steel Finned Tube For Heat Exchanger

Nov 05, 2025

The ASTM A335 GR.P9 Alloy Steel Finned Tube is a high-performance heat exchanger component designed for demanding applications in industries such as power generation, petrochemical, oil & gas, and chemical processing. It combines the strength and heat resistance of ASTM A335 Grade P9 alloy steel with the enhanced surface area provided by finned tube technology, enabling efficient heat transfer and long-term durability.

Specification

Standard:	ASTM A335	Fin Material:	P9
Tube/Pipe Size:	16 - 219MM	Fin Type:	1 To 7 Fins Per Inch
FinPitch:	2.1 - 5MM
Highlight:	ASTM A335 P9 serrated fin tube, oil refining condenser fin tube, serrated fin tube for condensers

Material Composition:

Chromium (Cr): 8.0-10.0%

Molybdenum (Mo): 0.90-1.10%

Carbon (C), Manganese (Mn), Silicon (Si), Phosphorus (P), Sulfur (S), and others.

Key Features

Material Composition:

Made from ASTM A335 Grade P9 alloy steel, which contains Chromium (Cr) and Molybdenum (Mo). These elements enhance the tube's resistance to high temperatures, oxidation, and corrosion.

Heat Resistance:

Excellent high-temperature strength, making it suitable for heat exchangers, boilers, and superheater applications at elevated temperatures.

Finned Design:

The finned structure increases the surface area of the tube, enhancing thermal conductivity and optimizing heat transfer efficiency.

Corrosion and Oxidation Resistance:

Superior resistance to oxidation and scaling in aggressive environments, especially in high-temperature and high-pressure conditions.

Durability:

High mechanical strength and resistance to thermal fatigue, ensuring long service life.

Applications

The ASTM A335 GR.P9 Alloy Steel Finned Tube is widely used in applications where heat transfer efficiency and durability are critical, such as:

Heat exchangers and condensers.

Boilers and economizers in power plants.

Oil and gas processing units.

Petrochemical and chemical industries.

Process heaters and air coolers.

Advantages

High-efficiency heat exchange due to the finned surface.

Exceptional performance under extreme temperatures and pressures.

Cost-effective solution for thermal management in industrial systems.

Compliance with ASTM A335 GR.P9 standards ensures consistent quality.

Quality Standards and Testing

To ensure reliability and performance, ASTM A335 P9 serrated fin tubes are manufactured and tested according to stringent quality standards, including: