ASTM A335 Grade P23 Alloy Steel Seamless Pipes Manufacturer, Exporter & Suppliers
We are one of the leading Manufacturers, Supplier and Exporters of ASTM A335 P23 Alloy Steel Seamless Pipes that is using high quality raw materials . All products are industry-standard conforming to or exceeding API, ASTM, ASME, ANSI and other national and international standards. These pipes are available in different size, specification, grades & thikness as per the clients requirements. These pipes are widely used in different various application such as oil & gas, power plants, ship building, heavy engineering industries etc. We offer these Pipe at best effortable rates to our clients in the market.
What Are ASTM A335 P23 Alloy Steel Seamless Pipes?
ASTM A335 P23 Pipes, designated by UNS K40712 Pipe, represent an advanced generation of Chrome moly P23 pipe. This grade is a modified 2.25% Chromium steel, significantly enhanced with precise additions of Tungsten (approx. 1.6%), Molybdenum, Vanadium, Niobium, and Boron. This sophisticated P23 Material Composition and controlled heat treatment result in a fine-grained bainitic or martensitic/bainitic microstructure, providing substantially improved creep strength and higher allowable operating temperatures compared to traditional P22 grade.
The seamless manufacturing process ensures that these ASTM S335 Grade P23 pipes possess maximum structural integrity, essential for P23 high-temperature pipe applications involving severe thermal and mechanical stresses. The ASME SA335 P23 Pipe is the equivalent standard often specified for boiler and pressure vessel code applications. P23 was developed to bridge the performance gap between conventional Cr-Mo steels and the more highly alloyed P91/P92 grades, offering an optimized balance of properties for specific high-temperature applications like waterwalls in supercritical boilers.
ASTM A335 P23 Alloy Steel Seamless Pipe Specifications
| 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. |
| UNS Designation | K40712 |
| Trade Names | Chrome Moly P23 Pipe, 2.25Cr-1.6W-V-Nb Pipe, P23 Ferritic Alloy Steel Pipe, Alloy Steel P23 Pipes |
Chemical Composition of ASTM A335 P23 Alloy Steel Seamless Pipes
| C, % | Mn, % | P, % | S, % | Si, % | Cr, % | Mo, % | V, % | Nb, % | B,% | N, % | Al, % | W, % |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 0.04-0.10 | 0.1-0.6 | 0.03 max | 0.01 max | 0.5 max | 1.9-2.6 | 0.05-0.30 | 0.20-0.30 | 0.02-0.08 | 0.0005-0.006 | 0.03 max | 0.03 max | 1.45-1.75 |
Mechanical Properties of ASTM A335 P23 Alloy Steel Seamless Pipes
| Tensile Strength, MPa | Yield Strength, MPa | Elongation, % |
|---|---|---|
| 510 min | 400 min | 20 min |
ASTM A335 P23 Pipes Outside Diameter & Tolerance
Here's a breakdown of the typical outside diameter (OD) and its corresponding tolerances for Alloy Steel P23 Pipes, categorized by manufacturing process (Hot Rolled or Cold Drawn) and Nominal Pipe Size (NPS):
| ASTM A450 | Hot rolled | Outside Diameter, mm | Tolerance, mm |
| OD≤101.6 | +0.4/-0.8 | ||
| 101.6＜OD≤190.5 | +0.4/-1.2 | ||
| 190.5＜OD≤228.6 | +0.4/-1.6 | ||
| Cold Drawn | Outside Diameter, mm | Tolerance, mm | |
| OD＜25.4 | ±0.10 | ||
| 25.4≤OD≤38.1 | ±0.15 | ||
| 38.1＜OD＜50.8 | ±0.20 | ||
| 50.8≤OD＜63.5 | ±0.25 | ||
| 63.5≤OD＜76.2 | ±0.30 | ||
| 76.2≤OD≤101.6 | ±0.38 | ||
| 101.6＜OD≤190.5 | +0.38/-0.64 | ||
| 190.5＜OD≤228.6 | +0.38/-1.14 | ||
| ASTM A530 & ASTM A335 | NPS | Outside Diameter, inch | Tolerance, mm |
| 1/8≤OD≤1-1/2 | ±0.40 | ||
| 1-1/2＜OD≤4 | ±0.79 | ||
| 4＜OD≤8 | +1.59/-0.79 | ||
| 8＜OD≤12 | +2.38/-0.79 | ||
| OD>12 | ±1% |
Wall Thickness & Tolerance of ASTM A335 P23 Alloy Steel Seamless Pipes
| ASTM A450 | Hot rolled | Outside Diameter, mm | Tolerance, % |
| OD≤101.6, WT≤2.4 | +40/-0 | ||
| OD≤101.6, 2.4＜WT≤3.8 | +35/-0 | ||
| OD≤101.6, 3.8＜WT≤4.6 | +33/-0 | ||
| OD≤101.6, WT>4.6 | +28/-0 | ||
| OD>101.6, 2.4＜WT≤3.8 | +35/-0 | ||
| OD>101.6, 3.8＜WT≤4.6 | +33/-0 | ||
| OD>101.6, WT>4.6 | +28/-0 | ||
| Cold Drawn | Outside Diameter, mm | Tolerance, % | |
| OD≤38.1 | +20/-0 | ||
| OD>38.1 | +22/-0 | ||
| ASTM A530 | NPS | Outside Diameter, inch | Tolerance, % |
| 1/8≤OD≤2-1/2 | +20.0/-12.5 | ||
| 3≤OD≤18, WT/OD≤5% | +22.5/-12.5 | ||
| 3≤OD≤18, WT/OD>5% | +15.0/-12.5 | ||
| OD≥20, WT/OD≤5% | +22.5/-12.5 | ||
| OD≥20, WT/OD>5% | +15.0/-12.5 |
Heat Treatment for ASTM A335 P23 Pipes:
Achieving the superior properties of ASTM A335 P23 Pipes is critically dependent on precise heat treatment:
- Normalizing (or Austenitizing): Pipes are uniformly heated to a temperature range of approximately 1040°C to 1080°C (1900°F to 1975°F). This step is crucial for dissolving carbides and achieving a homogenous austenitic structure. Cooling can be in air or by accelerated means (e.g., liquid quenching).
- Tempering: Following normalizing and cooling, the pipes are tempered at a temperature typically between 730°C to 800°C (1350°F to 1470°F). This tempering process develops the fine-grained bainitic or martensitic/bainitic microstructure that provides the enhanced creep strength and toughness.
Applications & Industries Served by ASTM A335 P23 Pipes
The advanced properties of ASTM A335 P23 Pipes, particularly its enhanced creep strength, make it suitable for demanding high-temperature applications:
- Power Generation (Primary Application):
- Boiler Tube P23: Extensively used for waterwall panels in supercritical (SC) and ultra-supercritical (USC) power boilers, where it offers advantages over P22.
- Superheater and reheater tubing in certain advanced boiler designs.
- Economizer tubing.
- Petrochemical & Refining:
- Piping and tubing in specific high-temperature, high-stress applications where improved creep resistance over conventional Cr-Mo grades is beneficial.
- Heat Recovery Steam Generators (HRSGs):
- In high-efficiency combined cycle power plants for tubing exposed to high temperatures and pressures
- Expertise in CSEF Steels: In-depth understanding of advanced alloys like P23, including its specific P23 Material Composition and critical heat treatment requirements.
- Precision Manufacturing:Advanced facilities to produce ASTM A335 P23 Alloy Steel Seamless Pipes with consistent quality and dimensional accuracy.
- Stringent Quality Assurance:Our ISO 9001 certified processes and rigorous testing ensure every ASTM S335 Grade P23 pipe meets international standards, supplied with a full MTC detailing the P23 chemical composition.
- Competitive Pricing:We offer an optimal Price for high-quality Chrome moly P23 pipe, reflecting its advanced nature and performance benefits.
- Global Export Capabilities:Efficient logistics and experience in exporting P23 seamless pipe worldwide.
- Customization & Technical Support:We provide cut-to-length services, custom orders, and expert technical assistance for your requirements.
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The use of A335 P23 Alloy Steel Pipe allows for more efficient power plant designs by enabling operation at higher temperatures or with reduced component thicknesses compared to traditional P22.
Why Choose Amardeep Steel for Your ASTM A335 P23 Pipes?
Amardeep Steel is your trusted Manufacturer, Supplier, and Exporter of ASTM A335 P23 Pipes in India and globally:
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Get Your ASTM A335 P23 Pipes Price & Consultation
For the latest Price, detailed technical specifications, or to discuss your project requirements for ASTM A335 P23 Pipes, contact the alloy steel experts at Amardeep Steel Centre today. We are committed to providing high-quality ASTM A335 P23 Alloy Steel Seamless Pipes and tailored solutions for your demanding high-temperature applications, backed by a thorough understanding of P23 material and its critical P23 chemical composition.