Description
ASTM A335 P1 P2 P5 P9 P11 Ferritic Alloy-Steel Pipe
Material Specification
ASTM A335 is the standard specification for seamless Ferritic Alloy-Steel Pipe intended for high-temperature service. The specification covers various grades of pipes such as P1, P2, P5, P9, and P11. These Ferritic Alloy-Steel Pipes are predominantly used for boiler, superheater, and heat exchanger applications.
Key Features
Ferritic Alloy-Steel Pipe are known for their strong durability, excellent tensile strength, and resistance to heat and corrosion. They are also capable of withstanding high-temperature applications, making them suitable for power plants, refineries, and industrial sectors. The key characteristics include:
- High-temperature resistance: Can endure extreme heat and temperature fluctuations.
- Corrosion resistance: Excellent performance in corrosive and oxidative environments.
- Versatility: Suitable for multiple industrial applications.
- Durability: Long-lasting with minimal maintenance.
Chemical Composition
The chemical composition of Ferritic Alloy-Steel Pipe under ASTM A335 differs slightly among the different grades. Below is a general representation of the chemical makeup:
| Element | P1 (%) | P2 (%) | P5 (%) | P9 (%) | P11 (%) |
|---|---|---|---|---|---|
| Carbon | 0.10-0.20 | 0.05-0.15 | 0.15 max | 0.15 max | 0.15 max |
| Manganese | 0.30-0.80 | 0.30-0.60 | 0.30-0.60 | 0.30-0.60 | 0.30-0.60 |
| Silicon | 0.10-0.50 | 0.10-0.50 | 0.50 max | 0.50 max | 0.50 max |
| Chromium | – | – | 4.00-6.00 | 8.00-10.00 | 1.00-1.50 |
| Molybdenum | – | – | 0.45-0.65 | 0.90-1.10 | 0.44-0.65 |
Mechanical Properties
The mechanical properties of Ferritic Alloy-Steel Pipes vary across grades but meet the requirements for high strength and durability:
| Property | P1 | P2 | P5 | P9 | P11 |
|---|---|---|---|---|---|
| Tensile Strength (MPa) | 275 min | 415 min | 415 min | 415 min | 415 min |
| Yield Strength (MPa) | 205 min | 205 min | 240 min | 240 min | 205 min |
| Elongation (%) | 30 min | 30 min | 30 min | 30 min | 30 min |
Similar Standards and Steel Grades
- ASTM: A335
- EN: 10216-2
- GOST: 550-75
- JIS: G3458
- GB: 5310
These standards reflect similar qualities and specifications of Ferritic Alloy-Steel Pipe across different global frameworks.
Application
Ferritic Alloy-Steel Pipe are essential in construction and engineering sectors where high heat and pressure resistance are required. Applications include:
- Power Generation: Used in turbines, nuclear, and thermal power plants.
- Petrochemical Industry: Ideal for oil and gas processing and transportation.
- Industrial Boilers: Suitable for the construction of boilers that operate under high temperatures.
- Refineries: Widely used in heat exchangers and refinery piping systems.
