Products Description
P22 is the steel grade in ASTM A335 alloy seamless steel pipe standard. P22 is 2.25cr-mo high temperature ferritic steel for boiler and superheater.
The thermal strength of ASTM A335 P22 steel is relatively high, and its creep rupture strength and allowable stress at the same temperature (temperature ≤ 580 ℃) are even higher than that of 9Cr Mo steel, and it has good processability and weldability, and good durable plasticity.
Therefore, it has been widely used in the harsh working environment, such as in thermal power, nuclear power and some hydrogen equipment, such as various heating pipe belts and high-pressure vessels.
ASTM A335 P22 steel has been widely used in the United States, Japan and Europe. ASTM A335 P22 steel is a mature steel with stable performance and good process performance.
Products Specification
Manufacture:Seamless process ,Hot-finished or Cold-finished
Wall thickness(WT): 2.1mm--20 mm.
Outer diameter (OD): 21 mm--509mm
Length: 6M or specified length as required.
Ends: Plain End, Beveled End, Treaded
Chemical Composition of ASTM A335 P22
| Grade | Chemical Composition(%) | ||||||
| C | Mn | P | S | Si | Cr | Mo | |
| P22 | ≤0.015 | 0.30-0.60 | ≤0.025 | ≤0.025 | ≤0.50 | 1.90-2.60 | 0.87-1.13 |
Mechanical Properties of ASTM A335 P22
| Grade | Mechanical property | ||
| Tensile Strength(MPa) | Yield Strength(MPa) | Elongation(%) | |
| P22 | ≥415 | ≥205 | |
Chemical Composition
| Compositions | Data |
| UNS Designa-tion | K21590 |
| Carbon | 0.05-0.15 |
| Manganese | 0.30-0.60 |
| Phosphorus(max.) | 0.025 |
| Sulfur(max.) | 0.025 |
| Silicon | 0.50-1.00 |
| Nickel | … |
| Chromium | 1.90-2.60 |
| Molybdenum | 0.87-1.13 |
| Other Elements | … |
