ASTM A335 P5 Alloy Steel Pipes Manufacturer in India

ASTM A335 P5 Alloy Steel Pipes Specifications

ASTM A335 P5 Alloy Steel Pipes Standards

Each lot goes through chemical analysis, tensile and flattening tests, then a hydrostatic test or non-destructive examination as the standard requires. We also run positive material identification so the chromium and molybdenum are checked on the finished pipe. Third-party inspection can be arranged before dispatch.

ASTM A335 P5 Alloy Steel Pipes Material and Grades

P5 is one grade in a family of chromium-molybdenum pipes. The number tells you roughly how much chromium it carries, and more chromium means more heat and sulfur resistance.

In ASTM A335, P5 has 4–6% chromium and 0.45–0.65% molybdenum. Related grades include P5b, which carries higher silicon (1.00–2.00%), and P5c. P5 sits above P11 and P22 in heat resistance and below P9 and P91, so it covers the middle ground where P22 starts to scale but P9 is more than the job needs.

If your drawing names P5 together with a Charpy or hardness requirement, tell us when you enquire so the heat can be chosen and tested for it.

ASTM A335 P5 vs P9 Alloy Steel Pipes

These two come up together more than any other pair. P9 is the step up, with nearly double the chromium and double the molybdenum, and that buys more oxidation and creep resistance at higher temperature.

Pick P5 when your design temperature sits comfortably within its range and the process does not call for more. Pick P9 where temperatures push higher or the sulfidation risk is severe.

Elevated Temperature and Corrosion Performance of ASTM A335 P5 Alloy Steel Pipes

P5 is a creep-resistant steel. Under long heat and pressure, it keeps its shape better than plain carbon steel, and its chromium builds a protective scale that stands up to oxidation up to about 600 °C.

It also resists sulfidation, which is the attack by sulfur compounds in crude and refinery streams. For hot hydrogen service, 5Cr-½Mo is a recognised choice and sits higher on the Nelson curves than carbon steel.

Treat welding with care. P5 is air-hardening, so a weld that cools too fast can turn hard and crack. Preheat of roughly 200–300 °C and post-weld heat treatment of roughly 700–760 °C are normal, but follow your own welding procedure specification.

It is not stainless steel. In wet, salty or acidic conditions it will rust, so keep it painted or varnished in storage, and use stainless or duplex where corrosion, not heat, is the problem.

ASTM A335 P5 Alloy Steel Pipes Chemical Composition

Limits per ASTM A335 for grade P5.

ASTM A335 P5 Alloy Steel Pipes Mechanical Properties

These are room-temperature minimums. At working temperature, allowable stress falls, so design to the code tables for the temperature, not to these figures.

ASTM A335 P5 Alloy Steel Pipes Size and Weight Chart

Weight in kg per metre = (OD − wall) × wall × 0.02466, with both in mm. Treat it as an estimate, since the actual weight shifts with the wall tolerance.

We can send a full weight chart for any other size and schedule.

ASTM A335 P5 Alloy Steel Pipes Sizes, Dimensions and Schedules

Sizes run from ½" to 24" NB, with walls from light Sch 20 up to XXS. Heavy walls suit high-pressure headers, and thinner walls suit lower-pressure heater piping. Non-standard sizes and walls can be made to your drawing. Lengths come as single random, double random or cut to size. Ends can be plain, beveled for welding or threaded. For surface, pipes are supplied black, varnished or painted, so they arrive protected from rust.

Common Materials for ASTM A335 P5 Alloy Steel Pipes

High-temperature piping projects may require different alloy steel grades and matching components, depending on operating pressure, temperature, and the type of equipment involved. Along with ASTM A335 P5 pipes, the following materials are commonly specified for boiler, refinery, and power plant applications.

ASTM A335 P11 Pipes: Chromium-molybdenum alloy steel pipes used in high-temperature service where moderate alloy content is suitable.

ASTM A335 P9 Pipes: Higher-chromium alloy steel pipes designed for demanding heat and oxidation conditions.

ASTM A335 P22 Pipes: Commonly used in power generation, boilers, and refinery systems that require high-temperature strength.

ASTM A335 P91 Pipes: High-strength alloy steel pipes used in advanced power plant and high-pressure steam applications.

ASTM A335 P5 Fittings and Matching Components: Compatible fittings, elbows, tees, reducers, and flanges help complete piping assemblies when selected to meet the required specifications.

Experienced ASTM A335 P5 Alloy Steel Pipes Suppliers can help identify suitable grades and components based on design conditions, applicable standards, and material compatibility. The final selection should always follow the project's engineering specifications.

ASTM A335 P5 Alloy Steel Pipes We Manufacture and Supply

We make seamless P5 pipe in hot finished and cold drawn forms, from small-bore lines to large headers. P5 tubes, fittings and flanges can ride on the same order, so one set of heat numbers and certificates covers the whole package. As an ASTM A335 P5 Alloy Steel Pipes Manufacturer, we carry out heat treatment, straightening, cutting, beveling and inspection ourselves. This lets us respond to cut-length and end-prep requests, and it keeps every length traceable to its heat.

ASTM A335 P5 Alloy Steel Pipes Applications

• Refinery Heaters and Furnaces: Tubes and piping in fired heaters where heat and sulfur attack together.
• Crude and Vacuum Units: Hot transfer lines and overhead systems in distillation.
• Hydroprocessing: Lines in hydrotreating and hydrocracking units that carry hot hydrogen.
• Petrochemical Plants: Cracking and reforming piping at elevated temperature.
• Power Generation: Steam lines and headers where P22 is too light and P91 is more than needed.
• Boilers and Heat Exchangers: Pressure parts working in sustained heat.
• Oil and Gas Processing: High-temperature process lines at gas plants and terminals.
• Chemical and Fertilizer Plants: Hot-gas and process piping in sulfur-bearing streams.

Why Choose Us as Your ASTM A335 P5 Alloy Steel Pipes Manufacturer in India?

You should choose us because we have been working in the industrial pipes and tubes industry since 2005. Over the years, we have developed experience in supplying materials for refineries, power plants, boilers, and petrochemical projects. Our ISO 9001:2015 and applicable TÜV certifications support our focus on product quality and reliable supply. With a monthly capacity of up to 100 tons, we can handle bulk orders and project requirements.

You should also choose us because we understand the importance of meeting the correct material specifications. We supply ASTM A335 P5 Alloy Steel Pipes in different sizes, schedules, and wall thicknesses to suit high-temperature applications. Material testing, inspection, and mill test certificates can be arranged according to the requirements of each order.

Another reason to work with us is our ability to support different project needs. We supply a wide range of industrial pipes and tubes in stainless steel, duplex, carbon steel, alloy steel, and nickel alloys. This helps simplify sourcing when a project requires multiple material grades.

Finally, our export experience covers 85+ countries. As an ASTM A335 P5 Alloy Steel Pipes Supplier in India, we coordinate packing, shipping documents, and third-party inspections when required, helping keep domestic and international orders organised from enquiry to dispatch.

Countries We Export ASTM A335 P5 Alloy Steel Pipes To

We are an ASTM A335 P5 Alloy Steel Pipes Manufacturer and Supplier in India, serving refineries, power plants, petrochemical units and EPC contractors in 85+ countries. Main markets include:

North America: USA, Canada, Mexico

Europe: Germany, United Kingdom, France, Italy, Netherlands, Spain, Belgium

Middle East: UAE, Saudi Arabia, Qatar, Oman, Kuwait, Bahrain

Asia-Pacific: Singapore, Malaysia, Indonesia, Australia, Japan, South Korea, Thailand

Africa: South Africa, Nigeria, Egypt, Kenya, Algeria

South America: Brazil, Argentina, Chile, Colombia

Each shipment carries EN 10204 3.1 certificates, with 3.2 and third-party inspection on request. Pipes are varnished or painted, capped at both ends and bundled or crated for sea freight, and we prepare the invoice, packing list and test certificates to match your port and customs requirements.