ASTM A335 P11 Pipe

ASTM A335 P11 Pipe Manufacturer & Supplier in India

Katariya Steel supplies ASTM A335 P11 Pipes in India for high-temperature piping systems, boiler lines, steam services, refineries, petrochemical plants and power generation applications. These seamless ferritic alloy-steel pipes are manufactured to ASTM A335 / ASME SA335 P11 requirements and are available in different sizes, wall thicknesses and schedules.

Our ASTM A335 P11 Pipes are supplied with material identification and inspection documentation as required for the order. We serve manufacturers, EPC contractors, process plants and procurement teams requiring P11 chrome moly pipe with traceable technical documentation.

ASTM A335 P11 Alloy Steel Pipe Specifications

Specifications ASTM A335 / ASME SA335
Grade P11
UNS Designation K11597
Material 1¼Cr-½Mo Alloy Steel
Pipe Type Seamless
Size NPS 1/8" and above, as required
Schedule SCH 5 to SCH 160 and other schedules as required
Dimension Standard ASME B36.10M
Length Single Random, Double Random & Cut Length
Ends Plain End, Beveled End
Manufacturing Hot Finished / Cold Drawn, as applicable
Heat Treatment Full or Isothermal Anneal, or Normalize & Temper
Inspection Visual, Dimensional, Chemical & Mechanical Testing
Testing Hydrostatic / NDT as applicable to specification and order
Documentation MTC, Inspection Reports and other documents as required
Packing Bundles, Wooden Cases, Plastic Protection or Customer Requirement

ASTM A335 covers seamless ferritic alloy-steel pipe intended for high-temperature service and specifies requirements relating to chemistry, tensile properties, hardness, hydrostatic testing and examination.

ASTM A335 P11 Pipe Chemical Composition

ASTM A335 P11 contains chromium and molybdenum as the principal alloying elements. The combination is commonly identified as 1¼Cr-½Mo alloy steel, with the chemistry controlled according to the applicable ASTM specification.

Element Composition (%)
Carbon (C) 0.05 – 0.15
Manganese (Mn) 0.30 – 0.60
Silicon (Si) 0.50 – 1.00
Chromium (Cr) 1.00 – 1.50
Molybdenum (Mo) 0.44 – 0.65
Phosphorus (P) 0.025 max
Sulfur (S) 0.025 max

ASTM A335 P11 Pipe Mechanical Properties

P11 pipes are supplied to minimum mechanical property requirements specified for the grade.

Mechanical Property Minimum Requirement
Tensile Strength 415 MPa
Yield Strength 205 MPa
Elongation 30%

The actual test values are recorded in the material test documentation supplied with the relevant order.

ASTM A335 P11 Pipe Equivalent Grades

ASTM A335 P11 is also identified by several material designations used across different specifications and industries.

Standard / Designation Equivalent / Reference
ASTM A335 P11
ASME SA335 P11
UNS K11597
JIS STPA23
ASTM Boiler Tube Reference A213 T11
Material Description 1¼Cr-½Mo
Chrome-Moly Description Chromium-Molybdenum Alloy Steel

Equivalent grades should not be substituted automatically. The applicable standard, chemistry, dimensions, mechanical properties, design conditions and project specifications should be checked before accepting an alternative material.

ASTM A335 P11 Pipe Heat Treatment

ASTM A335 P11 pipe is heat treated according to the applicable ASTM requirements. P11 permits full or isothermal annealing, or normalizing and tempering, with the applicable tempering/subcritical annealing temperature specified at 1200°F [650°C] minimum in the referenced ASTM heat-treatment table.

Heat Treatment P11 Requirement
Full Annealing Applicable
Isothermal Annealing Applicable
Normalizing & Tempering Applicable
Minimum Tempering / Subcritical Annealing Temperature 1200°F [650°C]

The final heat-treatment condition should be confirmed against the applicable edition of ASTM A335/A335M and the purchase specification.

ASTM A335 P11 Pipe Sizes & Dimensions

Katariya Steel can supply P11 pipes in different NPS sizes, schedules and wall thicknesses according to project requirements. ASTM A335 uses NPS designations, while dimensional requirements for ordered pipe are commonly referenced to ASME B36.10M.

Common ASTM A335 P11 Pipe Dimensions

NPS Outside Diameter (mm) SCH 40 Wall Thickness (mm) SCH 80 Wall Thickness (mm)
1/2" 21.3 2.77 3.73
3/4" 26.7 2.87 3.91
1" 33.4 3.38 4.55
1¼" 42.2 3.56 4.85
1½" 48.3 3.68 5.08
2" 60.3 3.91 5.54
2½" 73.0 5.16 7.01
3" 88.9 5.49 7.62
4" 114.3 6.02 8.56
5" 141.3 6.55 9.53
6" 168.3 7.11 10.97
8" 219.1 8.18 12.70
10" 273.1 9.27 15.09
12" 323.9 9.53 17.48

Additional schedules, wall thicknesses, lengths and non-standard dimensions can be supplied according to the project specification. Reference dimensional data for P11 pipe is published against standard NPS and schedule designations.

Alloy Steel P11 IBR Pipes

Alloy Steel P11 IBR Pipes are used where P11 alloy steel material is required for boiler, steam or related piping systems subject to applicable Indian Boiler Regulations requirements.

For IBR-related orders, material documentation, inspection and certification requirements depend on the component, application and applicable IBR provisions. Pipe certificates and material test documentation are important for establishing material identity, test results and traceability.

Alloy Steel P11 IBR Pipe Manufacturer & Supplier in India

Katariya Steel supplies Alloy Steel P11 IBR Pipes in India for projects requiring P11 chrome moly pipe along with the applicable material and inspection documentation.

For IBR requirements, buyers can specify the required grade, size, schedule, quantity and certification requirements at the enquiry stage so the supply can be matched with the applicable project documentation.

Alloy Steel P11 IBR Pipe Stockist & Exporter in India

Katariya Steel supplies and stocks Alloy Steel P11 IBR Pipes in different sizes and specifications for Indian and export requirements. Material can be supplied with the applicable MTC, inspection reports and other documentation specified in the purchase order.

For export orders, packing, marking, documentation and inspection can be arranged according to the destination and project requirements.

ASTM A335 P11 Pipe Features & Advantages

ASTM A335 P11 combines a chromium-molybdenum alloy composition with seamless pipe construction. Its controlled chemistry and mechanical properties make it suitable for piping systems designed for elevated-temperature service.

Key Features

  • Chromium-Molybdenum Alloy – P11 contains chromium and molybdenum for alloy-steel performance in elevated-temperature service.
  • Heat Treatment Control – Supplied in the heat-treated condition required by the applicable specification.
  • Seamless Construction – Provides a continuous pipe structure without a longitudinal welded seam.
  • High-Temperature Service – ASTM A335 specifically covers seamless alloy-steel pipe for high-temperature applications.
  • Multiple Schedules – Available in different wall thicknesses to suit piping design requirements.
  • Traceable Material – Heat number, grade and test information can be documented through the applicable material certificates.
  • Fabrication Suitability – ASTM A335 covers pipe suitable for bending, flanging and fusion welding, subject to applicable procedures and design requirements.

Applications of ASTM A335 P11 Pipes

  • Power Generation Plants
  • Boiler Systems
  • Steam Piping
  • Superheater Systems
  • Heat Exchangers
  • Refineries
  • Petrochemical Plants
  • Process Piping Systems
  • Oil & Gas Facilities
  • Thermal Power Projects
  • Industrial Heating Systems

Quality Inspection & Testing

Katariya Steel can provide inspection and testing documentation according to the applicable specification and purchase order.

  • Chemical Composition Testing
  • Tensile Strength Testing
  • Yield Strength Testing
  • Elongation Testing
  • Hardness Testing
  • Hydrostatic Testing
  • Flattening or Bend Testing where applicable
  • Visual Inspection
  • Dimensional Inspection
  • Positive Material Identification (PMI), where specified
  • Non-Destructive Testing as required
  • Third-Party Inspection, where specified
  • Mill Test Certificate
  • EN 10204 documentation where required

ASTM A335 includes requirements for hydrostatic testing and non-destructive examination, along with mechanical tests such as tension, flattening and hardness or bend testing.

For IBR orders, the required certificates and inspection documentation should be confirmed according to the applicable IBR requirements and project specification. Indian boiler procedures also require relevant material test certificates for applicable steam-pipeline work.

Why Choose Katariya Steel for ASTM A335 P11 Pipes?

Katariya Steel supplies ASTM A335 P11 alloy steel pipes for domestic and export requirements, with product specifications matched to the required grade, size, schedule and documentation.

Supply Advantages

  • ASTM A335 / ASME SA335 P11 material
  • Seamless alloy steel pipe
  • Multiple NPS sizes and schedules
  • MTC and inspection documentation
  • IBR-related documentation as applicable to the order
  • Domestic and export supply
  • Custom sizes and lengths on request
  • Project-based inspection coordination
  • Secure packing for domestic and international dispatch

ASTM A335 P11 Pipe Manufacturer, Supplier & Stockist in India

Katariya Steel supplies ASTM A335 P11 Pipes in India to industrial buyers, EPC contractors, engineering companies and project procurement teams. Orders can be arranged according to required grade, dimensions, schedule, quantity and documentation.


Domestic Supply of ASTM A335 P11 Pipes

  • Mumbai
  • Pune
  • Ahmedabad
  • Vadodara
  • Surat
  • Chennai
  • Bengaluru
  • Hyderabad
  • Delhi
  • Kolkata
  • Visakhapatnam
  • Coimbatore
  • Nashik
  • Rajkot
  • Jamnagar

ASTM A335 P11 Pipe Exporter from India

Katariya Steel exports ASTM A335 P11 alloy steel pipes from India for overseas industrial and engineering requirements. Export orders can be supplied with the required inspection documentation, marking, packing and shipping documents according to the purchase order.


International Supply of ASTM A335 P11 Pipes

Supply can be arranged for customers and projects in:

  • UAE UAE
  • Saudi Arabia Saudi Arabia
  • Qatar Qatar
  • Oman Oman
  • Kuwait Kuwait
  • Bahrain Bahrain
  • United States United States
  • United Kingdom United Kingdom
  • Germany Germany
  • Netherlands Netherlands
  • Singapore Singapore
  • Malaysia Malaysia

Request a Quote for ASTM A335 P11 Pipes

Share your ASTM A335 P11 pipe size, schedule, wall thickness, quantity, length and delivery location with Katariya Steel. If the order requires IBR documentation, third-party inspection or specific test certificates, mention those requirements with your enquiry.

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