ASME SA335 P9 Chromium-Molybdenum Alloy Studded Finned Tubes for High-Temperature Furnace Applications

High-Frequency Welded ASME SA335 P9 Studded Finned Tubes | Durable Chromium-Molybdenum Alloy for Extreme Heat Furnace Systems

Product Overview

Yuhong Holding Group Co., Ltd. introduces ​ASME SA335 P9 Studded Finned Tubes, engineered for high-temperature industrial applications. Utilizing high-frequency welding (HFW) technology, these tubes combine chromium-molybdenum alloy durability with optimized heat transfer efficiency.

Key Features

​1. Material & Chemical Composition

• ​Base Material: ASME SA335 P9 Chromium-Molybdenum Alloy Steel.
• ​Fin Material: High-grade stainless steel (AISI 304/316L) for corrosion resistance.
• ​Chemical Composition:

Compliant with ASME and ASTM standards.

2. Mechanical Properties

​3. Manufacturing Process

• ​High-Frequency Welding (HFW): Ensures 95% weld integrity between studs and base tube.
• ​Studded Fin Design: Spiral studs (diameter: 8-12mm) increase surface area by 3-5x.
• ​Post-Weld Treatment: Shot blasting and anti-corrosion coating (zinc or epoxy).

​4. Applications

• ​High-Temperature Furnaces: Cement kilns, steel reheating furnaces.
• ​Heat Recovery Systems: Boilers, economizers.
• ​Oil & Gas: Crackers, reformers.

​Advantages

1. ​Enhanced Heat Transfer: 30-50% higher efficiency compared to smooth tubes.
2. ​Corrosion Resistance: Suitable for acidic or sulfur-rich environments.
3. ​Customization: Available in lengths up to 18m and stud configurations (helical/axial).

​FAQ

Q1: What is the lead time for bulk orders?
A: Standard lead time is 4-6 weeks for 20-ft container loads.

Q2: Can these tubes withstand thermal cycling?
A: Yes, the ASME SA335 P9 alloy ensures stability under repeated heating/cooling.

Q3: Are certifications available?
A: We provide ASME, ISO 9001, and EN 10204-3.1 certifications.

​About Yuhong Holding Group Co., Ltd.

With ​20 years of expertise, Yuhong is a top-5 exporter of finned tubes in China, serving 80+ countries. Our facilities include:

• ​55 production lines and ​20,000㎡ factory area.
• ​110+ skilled technicians dedicated to quality control.

• ​Advanced Equipment: CNC high-frequency welders, 3D laser cutting machines.

Contact "jimmy@steelseamlesspipe.com" to explore our full product range.

Yuhong Holding Group has more than 35 years experience for pipeline products, till now we have 3 big joint venture factories,  the total production area more than 130000 square meters, and more than 600 workers with 106 production lines give our clients excellent supporting always.   The factories already got certificates like : ABS, LR, DNV-GL, BV, KR, CCS, ASME, ISO 9001, ISO14001, ISO18001, ect.

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;

Yuhong Holding Group also has gained rich experience for project package( products contain:Pipes, Fittings, Flanges, heat exchanger, furnace, fired heater, air cooler, boiler) , YUHONG brand has marked its global presence in more than 85 countries, like, Korea, USA, Canada, Mexico, Colombia, Bolivia, Chile, Argentina, Brazil, Ecuador, Austria, New Zealand, Singapore, Malasyia, Indonesia, Thailand, Vietnam, Ukraine, Turkey,Sauid Arabia, Qatar, U.A.E,Israel,India, UK, France, Italy, Gernmany, Poland, Spain,... We have successfully implemented the orders of Cross Country Pipelines for our valuable customers. In addition, we have also developed a huge network of contacts and strategic alliances with most important manufacturers as stockists around the world.