ASTM A335 P9 11CR Fin Serrated For Power Plants

Price Negotiable

Price: Negotiable

MOQ: 200-500KGS

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

Brand: Yuhong

Product Description

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