ASTM A335 P5 Alloy Steel Studded Fin Tube For Heat Exchanger

ASTM A335 P5 Studded Fin Tube

ASTM A335 P5 is a chromium-molybdenum alloy steel known for its good creep strength and oxidation resistance at elevated temperatures. Its key characteristic is the nominal 5% Chromium content, which provides improved resistance to sulfur-bearing atmospheres and higher temperature strength compared to lower alloy steels.

The ASTM A335 P5 Studded Fin Tube is a high-performance thermal component where studs (pins) are welded onto the base tube to create an extended heat transfer surface. This design is particularly effective in high-temperature and abrasive environments where conventional finned tubes might be unsuitable.

P5 Chemical Composition (%)

P5 Mechanical Properties

Comparison with Related Grades

P5 vs. P11/P22:
P5, with ~5% Cr, offers superior oxidation resistance and high-temperature strength compared to P11 (1.25% Cr) and P22 (2.25% Cr), making it suitable for more severe service conditions.

P5 vs. P9/P91:
P9 (9% Cr) offers better oxidation resistance, while P91 (9% Cr with V, Nb) provides significantly higher creep strength. P5 serves as a cost-effective option for intermediate temperature ranges.

Key Features & Advantages

High-Temperature Strength: Maintains good mechanical strength and resistance to creep at temperatures up to approximately 600°C (1100°F).

Oxidation & Sulfidation Resistance: The 5% Cr content provides a stable protective scale, offering better resistance than carbon steel to oxidizing and sulfur-bearing environments.

Enhanced Heat Transfer: The studded design drastically increases the surface area, significantly improving heat transfer efficiency in gas-to-liquid applications.

Mechanical Durability: The welded studs create a robust structure capable of withstanding abrasive and high-gas-velocity conditions.

Proven Performance: A well-established material for high-temperature pressure service in accordance with ASME Boiler and Pressure Vessel Code.

Applications of the ASTM A335 P5 Studded Tube

1.Petrochemical Heaters: Used in furnace convection and radiant sections for cracking and reforming processes.

2.Chemical Process Heaters: As heat transfer tubes in direct-fired heaters handling corrosive process streams.

3.Waste Heat Boilers: In high-temperature sections for recovering energy from process flue gases.

4.Power Generation: For specific high-temperature heat recovery systems and boiler elements.

5.Syngas Coolers: In environments where temperature and corrosion resistance are critical.

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Our factories main products as below : 
Factory 1th: Stainless steel seamless tube, Duplex steel seamless tube, Super duplex steel seamless tube, Nickel alloy steel seamless tube;

Factory 2th: Carbon steel seamless tube, Alloy steel seamless tube; Enhanced Heat Tranfer Tube, low fin tube ,U bending workshop;
Factory 3th: High frequency welding fin tube(HFW fin tube, Solid Fin tube, Studded Tube, Serrated Fin tube, Longitudinal welding fin tube), Wound fin tube(L type fin tube, LL type fin tube,  KL type fin tube), Embedded G type fin tube , Extruded fin tube,  low fin tube, U bend & 180deg. Return;

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