
ASTM A335 P11 Seamless Pipe
A335 P11 steel pipe is a kind of low alloy heat-resistant steel, which is mainly used in the manufacture of superheater, reheater, water-cooled wall, coal economizer and other key components of supercritical or ultra-supercritical boilers.
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A335 P11 Seamless Pipe Description
A335/ SA335-P11 seamless tubes are seamless alloy steel tubes for high temperature applications, which can be hot worked or cold drawn, and are normally supplied fully annealed, isothermally annealed, or normalized and tempered (with a minimum tempering temperature of 650C). The parent material is grouped as P-No.4, Gr.No.1, and the total mass fraction of its alloy composition is less than 5% for low alloy heat-resistant steel.A335 P11 steel pipe is widely used in engineering, coal mining, chemical industry, thermoelectricity, boilers, bridges, net frame structure and machinery and equipment processing and other fields.
A335 P11 Steel Pipe Specification
|
Thickness |
0.25 mm - 10 mm |
|
OD(outer diameter) |
1mm - 100mm |
|
Section Shape |
round or square or rectangular |
|
Place of Origin |
Henan, China |
|
Technique |
Seamless |
|
Certification |
SGS,CE,JIS,GB,EN,ISO |
|
Length |
3-12M according to client requirement |
|
Steel Grade |
|
|
MOQ |
10 Tons |
|
Delivery Time |
5-15 Days |
|
Payment method |
TT/LC |
ASTM A335 P11 Alloy Steel Pipe Chemical Composition
| Alloy Steel P11 | C | Cr | Mn | Mo | P | S | Si |
| 0.05 – 0.15 | 1.00 – 1.50 | 0.30 – 0.60 | 0.44 – 0.65 | 0.025 max | 0.025 max | 0.50 – 1.00 |
ASTM A335 P11 Chrome Moly Pipe Mechanical Properties
| Tensile Strength, MPa | Yield Strength, MPa | Elongation |
| 415 min | 205 min | 30 min |
A335 P11 Chrome Moly Alloy Pipe advantages
- Excellent high temperature resistance
The synergistic effect of chromium (Cr) and molybdenum (Mo) elements (Cr content 1.0-1.5%, Mo content 0.44-0.62%) significantly improves high temperature stability, can operate for a long time at 550℃, and has strong resistance to high temperature oxidation and creep deformation.
- High mechanical strength and toughness
Tensile strength ≥415MPa, yield strength ≥205MPa, elongation after fracture ≥30%, with high strength and good plasticity, can withstand high pressure impact and cyclic load.
- Good machinability
Supports cold drawing, hot rolling, bending and other forming processes, and can also be installed by welding (need to match nickel-based welding materials) and flange connection to meet the needs of complex engineering structures.
- Wide application fields
Mainly used for high-pressure resistant equipment in the fields of petrochemical (high temperature pipelines, reactors), power (boiler superheaters, main steam pipelines), nuclear power, etc..
A335 P11 alloy tubing Inspection
- Hydrostatic Test
The test pressure is calculated according to the standard formula (usually 1.5 times the design pressure), and the pressure holding time is ≥10 seconds to verify the pressure bearing capacity and sealing of the steel pipe. No leakage or permanent deformation is qualified.
- Non-destructive Testing (NDT)
Ultrasonic testing (UT): Detect internal cracks, slag inclusions and other defects, and the sensitivity must comply with ASTM E213 standards. Radiographic testing (RT): For welds or suspicious areas, the defect level is assessed according to ASTM E94/E1032.
A335 P11 Chrome Moly Seamless Steel Pipe for sale



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