ASTM A335 P22 Alloy Steel Pipe Supplier
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ASTM A335 P22 pipes are seamless tubes made from chromium-molybdenum alloy steel. Chromium is a key element in stainless steel, with steels containing 12% or more chromium being classified as stainless. Chromium excels in resisting oxidation at high temperatures and enhances the steel’s tensile strength, performance, and toughness at room temperature. This makes A335 P22 alloy steel an excellent choice for demanding environments such as power plants, refineries, petrochemical plants, and oilfield services where fluids and gas are transported at high temperatures and pressures.
These alloy steel pipes can be finished with black paint, anti-corrosion oil, or galvanized coatings based on customer preferences. Known for its strength, corrosion resistance, and high-temperature durability, A335 P22 alloy steel is both cost-effective and reliable for use in power generation and petrochemical industries.
A335 P22 pipes are designed to withstand bending, flanging, and other forming operations, and are also suitable for fusion welding. Specifically, ASTM A335 P22 UNS K21590 is a molybdenum-chromium alloy steel that performs well in these applications, making it a versatile option for various industrial needs.
Specification of ASTM A335 P22 Alloy Steel Pipe
| Size | : | 1/8NB TO 24NB IN |
| Standards | : | ASTM A 335, ASME SA 335 |
| Type | : | Seamless |
| Specialized in | : | Large Diameter Size |
| Outer Dimensions | : | 19.05mm – 114.3mm |
| Wall Thickness | : | 2.0mm – 14 mm |
| Length | : | max 16000mm |
| Schedule | : | Schedule 20 – Schedule XXS (heavier on request) up to 250 mm thk. |
| Form | : | Round, Square, Rectangular, Hydraulic Etc. |
| Length | : | Single Random, Double Random & Cut Length. |
| Tubing End | : | Plain End, Beveled End, Treaded. |
Chemical Compositions of ASTM A335 P22 Alloy Steel Pipe
| C, % | Mn, % | P, % | S, % | Si, % | Cr, % | Mo, % |
| 0.015 max | 0.30-0.61 | 0.025 max | 0.025 max | 0.50 max | 1.90-2.60 | 0.87-1.13 |
ASTM A335 P22 Alloy Steel Seamless Pipe Mechanical Properties
| Tensile Strength, MPa | Yield Strength, MPa | Elongation, % |
| 415 min | 205 min | 30 min |
ASTM A335 P22 Alloy Steel Pipe Tensile Requirements
| Seamless | ||||||
| P-5 | P-9 | P-11 | P-22 | P-91 | ||
| Tensile Strength, min., psi | ||||||
| ksi | 60 | 60 | 60 | 60 | 85 | |
| MPa | 415 | 415 | 415 | 415 | 585 | |
| Yield Strength, min., psi | ||||||
| ksi | 30 | 30 | 30 | 30 | 60 | |
| MPa | 205 | 205 | 205 | 205 | 415 | |
Heat Treatment Requirements of P22 Alloy Steel Pipe
|
P5, P9, P11, and P22 |
|
|
Grade |
Heat Treatment Type |
Normalizing Temperature Range F [C] |
Subcritical Annealing |
P5 (b,c) |
Full or Isothermal Anneal |
|
|
|
Normalize and Temper |
***** |
1250 [675] |
|
Subcritical Anneal (P5c only) |
***** |
1325 – 1375 [715 – 745] |
P9 |
Full or Isothermal Anneal |
|
|
|
Normalize and Temper |
***** |
1250 [675] |
P11 |
Full or Isothermal Anneal |
|
|
|
Normalize and Temper |
***** |
1200 [650] |
P22 |
Full or Isothermal Anneal |
|
|
|
Normalize and Temper |
***** |
1250 [675] |
P91 |
Normalize and Temper |
1900-1975 [1040 – 1080] |
1350-1470 [730 – 800] |
|
Quench and Temper |
1900-1975 [1040 – 1080] |
1350-1470 [730 – 800] |
ASTM A335 P22 Pipe Applications industries
P22 pipes find applications in a diverse range of industries, particularly in high-temperature environments. Some notable industries where P22 pipes are commonly utilized include:
- Pharmaceutical Equipment
- Chemical Equipment
- Sea Water Equipment
- Heat Exchangers
- Condensers
- Pulp and Paper Industry
- Off-shore Oil Drilling Companies
- Power Generation
- Petrochemicals
- Gas Processing
- Specialty Chemicals
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