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ASTM A335 Alloy Seamless Steel Pipe

ASTM A335 Alloy Seamless Steel Pipe Supplier

ASTM A335 alloy seamless steel pipe is made of high strength, high temperature resistant alloy steel material, widely used in oil, natural gas, chemical, electric power, boiler and other high temperature and high pressure environment. Excellent corrosion resistance, high temperature resistance and mechanical properties, suitable for use in extreme conditions.

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High Temperature Resistant Alloy Steel Pipe Description

  • High temperature tolerance: can withstand high temperature environment, suitable for boilers, steam pipes and other high temperature equipment.
  • High strength and oxidation resistance: It can work stably under high pressure and oxidation environment.
  • Seamless design: The seamless steel pipe structure is stronger, reducing welding defects and increasing the service life of the pipe.
  • Various specifications: Provide different outer diameter, wall thickness, length and other specifications to meet different engineering needs.
  • Corrosion resistance: Good corrosion resistance, suitable for harsh working environment.

Specifications and dimensions:

Outer diameter (OD): 20mm to 1000mm

Wall thickness (WT): 2mm to 100mm

Length: 6m, 12m,custom length or standard length

Material options: different material models available (P5, P9, P22, P91)

High Temperature Seamless Steel Pipe Technical

Chemical Components & Mechanical Properties

Grade Chemical composition(%)
C Si Mn Cr Mo P S Al Cu V
P5 0.05-0.15 0.50-0.80 0.30-0.60 4.50-6.00 0.90-1.20 ≤ 0.025 ≤ 0.025 ≤ 0.030 ≤ 0.25 ≤ 0.10
P9 0.05-0.15 0.50-0.80 0.30-0.60 4.00-6.00 0.90-1.20 ≤ 0.025 ≤ 0.025 ≤ 0.030 ≤ 0.25 ≤ 0.10
P22 0.05-0.15 0.50-0.80 0.30-0.60 2.25-2.75 0.90-1.10 ≤ 0.025 ≤ 0.025 ≤ 0.020 ≤ 0.25
P91 0.05-0.15 0.20-0.50 0.30-0.60 8.00-9.50 0.85-1.05 ≤ 0.020 ≤ 0.010 ≤ 0.050 ≤ 0.25 0.18 – 0.25

Grade Mechanical properties
Tensile Strength Yield strength Elongation Hardness Impact toughness
P5 485 – 620 MPa ≥ 205 MPa ≥ 20% (on a 50 mm long specimen) HB : ≤ 250
HRC : ≤ 25
Meets the requirements
of the Charpy impact test, usually a minimum requirement
at -20°C.
P9 485 – 620 MPa ≥ 205 MPa
P22 415 – 585 MPa ≥ 205 MPa
P91 585 – 725 MPa ≥ 415 MPa

ASTM A335 Alloy Seamless Steel Pipe Applications

  • Oil and gas industry: Used in oil pipelines, high-temperature oil and gas transmission pipelines.
  • Chemical industry: high temperature pipeline system for chemical fertilizer and chemical plant.
  • Power industry: Used in boilers, steam pipelines, heat exchangers and other equipment.
  • Other high temperature applications: suitable for steel, ships, aviation and other fields.

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