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Alloy Steel Pipes & Tubes

Sachin Steel Centre stands as a trusted name in the manufacturing and supply of high-quality Alloy Steel Pipes & Tubes. We offer a comprehensive range of products including seamless, welded, and fabricated alloy steel pipes in various sizes, grades, and specifications. Our alloy steel pipes are crafted using advanced manufacturing techniques and undergo rigorous quality checks to meet the highest standards. We adhere to international norms, including ASTM A335, A213, and A691, ensuring superior performance, durability, and resistance in high-temperature and high-pressure applications. Our alloy steel pipes are widely used in industries such as petrochemical, power generation, nuclear power, and gas.

We pride ourselves on our robust testing protocols, which include hydrostatic testing, ultrasonic testing, PMI testing, and more, to guarantee the quality and reliability of every product. With a state-of-the-art manufacturing process, we ensure precision in dimensions, superior strength, and corrosion resistance. Our ready stock of alloy steel pipes & tubes ensures timely delivery, while our experienced customer support team offers expert guidance to help you choose the right product for your needs.

Whether you are looking for customized orders or bulk supplies, we offer flexible solutions at competitive prices. Contact Sachin Steel Centre today for a seamless and efficient supply of Alloy Steel Pipes & Tubes. Let us help you meet your project requirements with the best-in-class alloy steel products and exceptional service.

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Manufacturer of Alloy Steel Seamless Pipe in India, Comply to ASTM A335/ SA 335 and EN 10216-2

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Know More About Alloy Steel Pipes & Tubes

Alloy steel pipes and tubes are made by combining steel with a variety of alloying elements, such as molybdenum, chromium, nickel, and manganese, to enhance their mechanical properties. These pipes are designed to provide superior strength, durability, and resistance to wear and corrosion, making them ideal for demanding industrial applications where standard carbon steel pipes fall short.

Alloy steel pipes offer exceptional performance in high-pressure and high-temperature environments. Seamless alloy steel pipes, produced from a single billet without welds, are particularly favored for critical applications, as they can withstand higher pressures and are more resistant to corrosion. On the other hand, welded alloy steel pipes, which are made by welding steel sheets together, are often used in less demanding environments and are more cost-effective.

Alloy steel pipes are available in a wide range of sizes, from ½ to 26mm in diameter, and are used across industries such as petrochemical, oil & gas, nuclear power, chemical processing, power generation, and more. They are known for their high tensile strength, with a minimum of 415MPa, and yield strength of at least 205MPa. Furthermore, they can withstand temperatures of up to 375°C, making them ideal for high-temperature applications like boiler systems and power plants.

Types of Alloy Steel Tubes

seamless-pipes

Alloy Steel Seamless Pipe

Welded Tube

Chromoly Round Pipe

Welded Pipe

AS Chrome Pipe

Carbon Steel

Low Alloy Steel Boiler Pipe

Square Pipe

Alloy Steel Square Pipe

Rectangular Pipe

Chrome Moly Rectangular Pipe

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Alloy Steel Products in India, Alloy Steel Manufacturer, Alloy Steel Supplier, Alloy Steel Exporter

Alloy Steel Pipe Specification

Specifications ASTM A 335 ASME SA 335
Dimensions ASTM, ASME and API
Size 1/8″NB TO 30″NB IN
Tubing Size 1 / 2” OD up to 5” OD, customs diameters also available
Outer Diameter 6-2500mm; WT:1-200mm
Schedule SCH20, SCH30, SCH40, STD, SCH80, XS, SCH60, SCH80, SCH120, SCH140, SCH160, XXS
Grade STM A335 Gr. P5, P9, P11, P12, P21, P22 & P91, ASTM A213 – T5, T9, T11, T12, T22, T91, ASTM A691
Length Within 13500mm
Type Seamless / Fabricated
Form Round, Hydraulic Etc
Length Single Random, Double Random & Cut Length.
End Plain End, Beveled End, Treaded

Chemical Composition of Alloy Steel Tubes

Grade UNS C= Mn P= S= Si= Cr Mo
P1 K11522 0.10~ 0.20 0.30~ 0.80 0.025 0.025 0.10~ 0.50 – 0.44~ 0.65
P2 K11547 0.10~ 0.20 0.30~ 0.61 0.025 0.025 0.10~ 0.30 0.50~ 0.81 0.44~ 0.65
P5 K41545 0.15 0.30~ 0.60 0.025 0.025 0.50 4.00~ 6.00 0.44~ 0.65
P5b K51545 0.15 0.30~ 0.60 0.025 0.025 1.00~ 2.00 4.00~ 6.00 0.44~ 0.65
P5c K41245 0.12 0.30~ 0.60 0.025 0.025 0.50 4.00~ 6.00 0.44~ 0.65
P9 S50400 0.15 0.30~ 0.60 0.025 0.025 0.50~ 1.00 8.00~ 10.00 0.44~ 0.65
P11 K11597 0.05~ 0.15 0.30~ 0.61 0.025 0.025 0.50~ 1.00 1.00~ 1.50 0.44~ 0.65
P12 K11562 0.05~ 0.15 0.30~ 0.60 0.025 0.025 0.50 0.80~ 1.25 0.44~ 0.65
P15 K11578 0.05~ 0.15 0.30~ 0.60 0.025 0.025 1.15~ 1.65 – 0.44~ 0.65
P21 K31545 0.05~ 0.15 0.30~ 0.60 0.025 0.025 0.50 2.65~ 3.35 0.80~ 1.60
P22 K21590 0.05~ 0.15 0.30~ 0.60 0.025 0.025 0.50 1.90~ 2.60 0.87~ 1.13
P91 K91560 0.08~ 0.12 0.30~ 0.60 0.020 0.010 0.20~ 0.50 8.00~ 9.50 0.85~ 1.05
P92 K92460 0.07~ 0.13 0.30~ 0.60 0.020 0.010 0.50 8.50~ 9.50 0.30~ 0.60

Alloy Steel Pipe Grades

Mechanical Properties of Alloy Steel Pipe

Tensile Strength, MPa Yield Strength, MPa Elongation, %
415 min 205 min 30 min

Equivalent Material Grades of Alloy Steel Pipe

ASTM Werkstoff /DIN EN
A335 Grade P1 1.5415 16Mo3
A335 Grade P5 1.7362 X11CrMo5
A335 Grade P9 – –
A335 Grade P11, P12 1.7335 13CrMo4-5
A335 Grade P22 1.738 10CrMo9-10
A335 Grade P91 1.4903 X10CrMoVNb9-1

ASME SA335 Alloy Steel Pipes Wall Thickness

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%

Alloy Steel Pipe Weight

Maximum Allowable Pressure (psi)
NPSOutside DiameterSchedule
(in)(in)102030STD4060XS80100120140160XXS
1/40.54   79857985 1079810798     
3/80.675   66066606 91479147     
1/20.84   63586358 85758575   1090817150
3/41.05   52735273 71877187   1022014373
11.315   49564956 66706670   931613340
1 1/41.66   41334133 56385638   738011276
1 1/21.9   37393739 51585158   724710316
22.375   31773177 44984498   70978995
2 1/22.875   34603460 47044704   63919408
33.5   30243024 42004200   61328400
3 1/24   27692769 38963896     
44.5   25812581 36703670 4769 57827339
55.563   22732273 33033303 4404 55056606
66.625   20712071 31953195 4157 53186390
88.625 142015741829182923072841284133754085461351474971
1010.75 114013991664166422792279270832773847455851284558
1212.75 96112681441156021601922264432443843432450423843
141487510921313131315332079175026253283382943754921 
16167669561148114815312009153125853157373344044882 
18186818491192102115302042136125533147374342524848 
2020613919122591914551989122525263138367542884824 
22225578351114835 1949111425063063361941764733 
2424510766114776614051978102124893126370042104786 
30305108171021613  817      
32324787669575741054        
3434450721901540992        
36364256818515101021        
4242 583729438875        
               

Alloy Steel Pipe Temperature

MaterialTemperature Range
Alloy steel850°F (454°C)
Chrome Moly Alloyupto 530°C
Low alloy steel (LTCS)-29°C – 593°C

Heat Treatment of Alloy Steel Pipes and Tubes:

Heat treatment enhances the mechanical properties of alloy steel pipes and tubes, improving strength, hardness, toughness, and corrosion resistance. This process involves controlled heating and cooling to alter the steel’s microstructure without changing its shape.

Key heat treatments include:

  • Annealing – Softens steel, improves ductility, and enhances machinability.
  • Normalizing – Strengthens steel, making it suitable for high-pressure applications.
  • Quenching and Tempering – Increases hardness and reduces brittleness for tough, durable steel.
  • Stress Relieving – Reduces internal stresses, enhancing stability and reducing deformation risk.

Heat Treatment of Chrome Moly Rectangular Pipe

Grades Heat Treatment Type P5, P9, P11, and P22 Subcritical Annealing or Tempering Temperature Range F [C] Normalizing Temperature Range F [C]
A335 P91 Normalize and Temper 1350-1470 [730 – 800] 1900-1975 [1040 – 1080]
Quench and Temper 1350-1470 [730 – 800] 1900-1975 [1040 – 1080]
A335 P22 Full or Isothermal Anneal – –
Normalize and Temper 1250 [675] *****
A335 P11 Full or Isothermal Anneal – –
Normalize and Temper 1200 [650] *****
A335 P9 Full or Isothermal Anneal – –
Normalize and Temper 1250 [675] *****
A335 P5 (b,c) Full or Isothermal Anneal – –
Normalize and Temper 1250 [675] *****
Subcritical Anneal (P5c only) 1325 – 1375 [715 – 745] *****
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Alloy Pipe Price

Alloy steel pipes offer excellent strength, corrosion resistance, and high-temperature performance. Prices vary based on material grade, size, wall thickness, and manufacturing process (seamless or welded). Seamless pipes are generally more expensive than welded due to additional processing. For the best rates and accurate pricing based on your needs, contact us for a competitive quote on ASTM A335 alloy pipes.

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Industries that Benefit from Alloy Steel Pipe

ASTM A335 Alloy Steel Pipes are renowned for their exceptional performance and reliability, designed to meet the demands of high-performance applications. These alloy steel pipes and tubes are widely used across industries such as:

  • Oil and Gas Pipeline
  • Chemical Industry
  • Plumbing
  • Heating
  • Power Plant
  • Paper & Pulp Industry
  • Fabrication Industry
  • Food Processing Industry
Application Industries

Frequently Asked Questions About Alloy Steel Pipes & Tubes

Alloy steel pipes are used in high-temperature and high-pressure applications such as in petrochemical industries, power plants, boilers, heat exchangers, and gas & oil pipelines due to their superior strength, durability, and resistance to corrosion.

 The main types of alloy steel pipes are:

  • Seamless Alloy Steel Pipes: Manufactured without welding, offering higher strength and pressure tolerance.
  • Welded Alloy Steel Pipes: Made by welding steel strips or coils, suitable for lower-pressure applications.
  • ERW (Electric Resistance Welded) Pipes: Produced by passing current through steel sheets, commonly used for structural applications.
  • Chrome-Moly Pipes: Special alloy pipes containing chromium and molybdenum for high-temperature applications.

Alloy steel pipes typically range in thickness from 0.3 mm to 50 mm, depending on the application, pipe grade, and pressure requirements. Custom thicknesses are also available.

 Common grades of alloy steel pipes include:

  • P1, P5, P9, P11, P22 (for high-temperature applications)
  • P91, P92 (for superior strength and creep resistance)
  • T1, T2, T5, T9 (used in power plants and boilers)

“Chrome-Moly” pipes are alloy pipes made from a mixture of chromium (Cr) and molybdenum (Mo), which significantly improve their high-temperature strength and resistance to corrosion and oxidation. Commonly used in the oil & gas industry and power plants.

  • High Strength: Can withstand high-pressure environments.
  • Corrosion Resistance: Resistant to corrosion, especially in harsh environments.
  • Temperature Resistance: Performs well under high-temperature conditions.
  • Durability: Provides long-lasting performance with minimal maintenance.
  • Toughness: Able to absorb energy without breaking or cracking.
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