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ASME SA335 P9 Seamless Ferritic Alloy Steel Pipes for High Temperature Service
ASME SA335 P9 Seamless Ferritic Alloy Steel Pipe for High Temperature Service
YUHONG GROUP is a specialized manufacturer of high-grade alloy steel pipes with over 30 years of experience in serving the global energy and petrochemical industries. Our ASME SA335 P9 Seamless Ferritic Alloy Steel Pipes are engineered for critical high-temperature applications, manufactured under strict quality control with full compliance to ASME and ASTM standards.
Heat Treatment Specifications
Parameter
Requirement
Notes
Grade
P9 (9Cr-1Mo)
Ferritic alloy steel
Heat Treat Type
Normalize and Temper
Mandatory process
Normalizing Temperature
1900-1975°F (1040-1080°C)
Austenitizing range
Cooling Media
Air cooling
No forced cooling required
Tempering Temperature
1100°F min (595°C)
Subcritical annealing
Microstructure
Tempered martensite
Post-treatment verification
Chemical Composition Requirements
Element
UNS K90941
Requirement (%)
Notes
Carbon (C)
0.15
Max
-
Manganese (Mn)
0.30-0.60
Range
-
Phosphorus (P)
0.025
Max
-
Sulfur (S)
0.025
Max
-
Silicon (Si)
0.25-1.00
Range
-
Chromium (Cr)
8.00-10.00
Range
Key alloy element
Molybdenum (Mo)
0.90-1.10
Range
Key alloy element
Mechanical Properties
Property
Requirement
Unit
Notes
Tensile Strength (min)
60
ksi
Equivalent to 415 MPa
Yield Strength (min)
30
ksi
Equivalent to 205 MPa
Material Grade
P9 (Other Category)
-
9Cr-1Mo Alloy Steel
Applications
High-Temperature Pressure Systems
Steam piping networks in power plants
Process piping for refineries and petrochemical facilities
General Industrial Services
Medium-temperature heat exchangers
Utility piping system
Advantages
Benefit
Technical Superiority
Standard Compliance
Meets minimum tensile and yield requirements per ASME SA335
Reliable Performance
Proven mechanical properties for non-critical elevated temperature services
Material Flexibility
Suitable for applications not requiring advanced alloy grades
Cost-Effective
Economical alternative where ultra-high strength is unnecessary
Yuhong Group is one of the large scale group company in China, more than 35 years experience in the international market, providing high-quality services to over 3000 customers, end user which like Aramco, Petrobras, Pemex, Petronas, Ecopetro, Petroecuador, …. till now Yuhong Grou...
Yuhong Group is one of the large scale group company in China, more than 35 years experience in the international market, providing high-quality services to over 3000 customers, end user which like Aramco, Petrobras, Pemex, Petronas, Ecopetro, Petroecuador, …. till now Yuhong Grou...