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ASTM A335 P9 11CR Fin Serrated For Power Plants

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ASTM A335 P9 11CR Fin Serrated For Power Plants

Brand Name : Yuhong

Certification : ABS, BV, DNV, CCS, LR

Place of Origin : China

MOQ : 200-500KGS

Price : Negotiable

Payment Terms : TT,LC

Supply Ability : According to Clients' requirements

Delivery Time : 45-75 Days (Depend on Customer's Requirement

Packaging Details : Ply-wooden Cases with Steel Frames(both ends of pipes have plastic caps)

Base Tube Material : ASTM A335 P9 11CR

Product Name : Serrated Finned Tube / Serrated Spiral High Frequency Welding Finned Tube

Application : heat exchangers, air preheaters

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1.What is ASTM A335 P9 11CR Fin Serrated?
ASTM A335 P9 11CR Fin Serrated Tubes are high-performance chromium-molybdenum alloy steel tubes with serrated (L-foot) fins, designed for extreme heat transfer efficiency in high-temperature/pressure environments. The P9 base material (9% Cr, 1% Mo) combined with mechanically bonded serrated fins creates a 20-30% larger heat exchange surface than smooth tubes, significantly boosting thermal performance while resisting oxidation up to 650°C.

2. Chemical & Mechanical Properties

Chemical Composition (ASTM A335 P9)

Element

Min (%)

Max (%)

Key Benefit

Chromium

8.00

10.00

Oxidation/Sulfidation Resistance

Molybdenum

0.90

1.10

High-Temperature Strength

Carbon

0.15

0.25

Stability at Elevated Temp

Manganese

0.30

0.60

Hot Workability

Silicon

0.50

1.00

Deoxidation Agent

Mechanical Properties

Property

Value

Advantage

Tensile Strength

≥ 415 MPa (60,200 psi)

Withstands high-pressure systems

Yield Strength

≥ 205 MPa (30,000 psi)

Resists deformation under thermal stress

Hardness (Brinell)

≤ 179 HBW

Optimal balance: Toughness & Wear Resistance

Operating Temp

-29°C to 650°C

Ideal for boilers, reformers, heaters

3. Key Applications
These tubes excel in critical heat transfer systems demanding corrosion resistance and thermal efficiency:
· Petrochemical: Hydrocracker furnaces, catalytic reformers (resists H₂S corrosion)
· Power Generation: Boiler superheaters, waste heat recovery units (25% longer service life vs. P11)
· Industrial Heating: Direct-fired heaters, thermal fluid systems (reduces fouling by 40%)
· Renewable Energy: Biomass boilers, geothermal heat exchangers

4. Why Choose Our Product?
· L-foot serration design prevents fin loosening under thermal cycling
· Laser-welded fins ensure 100% metallurgical bonding
· Customizable: OD 15-120mm, fin density 5-19 FPI

ASTM A335 P9 11CR Fin Serrated For Power Plants


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