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Grade A335 P9 is a specification for seamless ferritic alloy-steel pipe designed for high-temperature service applications. This material offers exceptional strength along with superior resistance to oxidation and corrosion at elevated temperatures.
ASTM A335 P9 seamless boiler tubes are widely used in power generation, petrochemical processing, chemical plants, industrial boilers, oil and gas operations, and marine applications. Their robust performance in high-temperature and corrosive environments ensures long-term reliability and operational efficiency.
Chemical Composition
Grade
Cr
Mo
C
Mn
P
S
Si
Ni
Fe
A335 P9
8.0-10.0%
0.9-1.10%
0.15% max
0.30-0.60%
≤ 0.25%
≤ 0.25%
0.50% max
≤ 0.4%
Balance
Mechanical Properties
Grade
Tensile Strength
Yield Strength
Elongation
Hardness
A335 P9
Min 415 MPa (60,200 psi)
Min 220 MPa (31,900 psi)
30% min in 50 mm
≤ 85 HRB
Key Features
High-Temperature Strength: Maintains excellent mechanical properties at elevated temperatures
Oxidation Resistance: Superior performance in high-temperature oxidizing environments
Creep Resistance: Exceptional resistance to creep deformation under prolonged high-temperature exposure
Durability: High tensile strength ensures reliable performance in demanding applications
Weldability: Excellent fabrication properties for easy installation and maintenance
Applications
Industrial Boilers:
Heating systems including boilers and furnaces for high-pressure steam/hot water generation
High-temperature process piping for industrial applications
Superheater tubes exposed to extreme temperatures and pressures
Power Generation:
Power plant boiler construction for high-pressure steam generation
Superheater tubes in thermal power stations
High-temperature steam piping systems
Chemical Processing:
Reactors and pressure vessels handling aggressive chemicals at high temperatures
High-pressure piping systems for steam and hot fluids
Heat recovery systems utilizing high-temperature steam
Company Details
Bronze Gleitlager
,
Bronze Sleeve Bushings
and
Graphite Plugged Bushings
from Quality China Factory
Business Type:
Manufacturer,Distributor/Wholesaler
Year Established:
1990
Total Annual:
5000000-10000000
Employee Number:
50~100
Ecer Certification:
Verified Supplier
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 alre... 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 alre...