Alloy Steel ASTM A691 Seamless Pipe is a heat-resistant and powerful pipe that is used on a large scale in power plant and refinery operations and petrochemical industries. Produced using advanced manufacturing processes, this pipe provides outstanding performance in crucial operations. Meta Aerospace provides premium-grade P91 pipes that are produced to industrial standards.

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What are ASTM A691 Seamless Pipe?

Alloy Steel ASTM A691 Seamless Pipe is produced through a seamless manufacturing process to ensure uniformity and strength. It is capable of withstanding high pressure, temperature variation, and severe environmental conditions. ASTM A691 is a specification for electric-fusion-welded steel pipes with high tensile strength and is ideal for oil and gas industries, power plant use, and chemical processing.

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ASTM A691 Seamless Pipe, ASTM A691 Seamless Pipe Manufacturers, ASTM A691 Seamless Pipe Suppliers, ASTM A691 Seamless Pipe Stockists, ASTM A691 Seamless Pipe Exporters

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Advantages of ASTM A691 Seamless Pipe?

The alloy steel ASTM A691 seamless pipe has several advantages. P91 seamless pipes have several benefits, such as:

  • High Strength and Longevity: They offer excellent tensile strength to provide long-term performance in severe conditions.
  • Corrosion resistance: The alloy composition enhances corrosion and oxidation resistance and lengthens the time of service.
  • Heat and pressure resistance: They can resist heat and pressure and are ideally suited for stress conditions.
  • Dimensional precision: Smooth manufacturing provides consistent dimensions that improve reliability and performance.
  • Low Maintenance: They are long-lasting and reduce the need for periodic maintenance and replacement.

Uniform structure eliminates weak spots with smooth build-up for increased reliability.

Uses and Applications ASTM A691 Seamless Pipe?

High Tensile Alloy Steel ASTM A691 Seamless Pipes are used in various applications.

  • Oil and gas sector Alloy Steel ASTM A691 Seamless Pipe is used heavily in offshore and onshore oil and gas pipelines owing to having a high tensile strength and corrosion resistance.
  • Power Plants These pipes are employed in steam and gas pipelines to offer effective energy transmission in hot temperature conditions.
  • Petrochemical Industry They are used in chemical processing plants where chemical and heat resistance is necessary.
  • Aerospace Industry In aerospace uses, these pipes are used for fuel and hydraulic transmission systems, where lightness and strength are crucial.
  • Construction and infrastructure Their toughness and strength make them eligible for structural applications in heavy industries and construction.
  • Automotive sector These pipes are used in manufacturing car exhaust systems and other heat-resistant uses.
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Meta Aerospace is one of the best alloy steel ASTM A691 seamless pipe producers that deliver best quality pipes that are in accordance with industrial specifications. Our manufacturing units ensure precision and consistency in every single product.

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Trustworthy Alloy Steel ASTM A691 Seamless Pipes Suppliers As one of the trustworthy Alloy Steel ASTM A691 Seamless Pipe Suppliers, Meta Aerospace provides best-in-class products to clients worldwide with assured on-time and dependable supply. Leading Stockists for ASTM A691 Seamless Pipes Meta Aerospace is a large Stockists of Alloy Steel ASTM A691 Seamless Pipes with a large inventory to meet the immediate requirements of our clients. Worldwide Renowned ASTM A691 Seamless Pipes Exporters Meta Aerospace is one of the best alloy steel ASTM A691 seamless pipe suppliers that supplies pipes to overseas destinations with excellent quality.

What Are Specification ASTM A691 Seamless Pipe?

Grade Alloy Steel ASTM A691 Cl22, A691 GRADE 1 CR, GRADE 1/2 CR, GRADE 1 1/4 CR, GRADE 2 1/4 CR, GRADE 3 CR, GRADE 5 CR, GRADE 9 CR, GRADE 91, CM 65, CM 70, CM 75
Size 1/2” NB to 36” NB
Thickness 3-12mm
Schedules SCH5, SCH10, SCH10S, SCH20, SCH30, SCH40, SCH40S, STD, SCH80, XS, SCH60, SCH80, SCH120, SCH140, SCH160, XXS
Class Designation Class 10, 11, 12, 13, 20, 21, 22, 23, 30, 31, 32, 33, 34, 40, 41, 42, 43, 50, 51, 52, 53, 60, 61, 62, 63, 70, 71, 72, 73
ASTM A691 Grades ASTM A691 Gr 11, ASTM A691 Gr.91, ASTM A691 9cr, ASTM A691 5cr, ASTM A691 1 1/4cr Cl22, ASTM A691m, ASTM A691 Gr.5cr Cl22, ASTM A691 Cm70, ASTM A691 Class 22, ASTM A691 Class 42, ASTM A691-91, ASTM A691 Grade 2.1/4cr, ASTM A691 11/4cr Cl22
Origin European, Japanese, Korean, US, Russian, Indian (Strictly No Chinese Material)
Tolerance Cold drawn pipe: +/-0.1mm Cold rolled pipe: +/-0.05mm
Craft Cold rolled and Cold drawn
Type Seamless / ERW / Welded / Fabricated / LSAW Pipes
available in Form of Round, Square, Rectangular, Hydraulic Etc.
Length Standard Double & In Cut length also.
End Plain End, Beveled End, Treaded
Specialized in Large Diameter ASTM A691 Pipe
Additional Testing NACE MR 0175, NACE TM0177, NACE TM0284, HIC TEST, SSC TEST, H2 SERVICE, IBR, etc.
Application Seamless Ferritic Alloy-Steel Pipe for High-Temperature Service

Equivalent material Of ASTM A691 Seamless Pipe?

Pipe Grade Type of Steel ASTM Specification HB, max
Number Grade
CM-65 carbon-molybdenum steel A204/A204M A 201
CM-70 carbon-molybdenum steel A204/A204M B 201
CM-75 carbon-molybdenum steel A204/A204M C 201
CMSH-70 carbon-manganese-silicon steel, normalized A537/A537M 1
CMS-75 carbon-manganese-silicon steel A299/A299M — —
CMSH-80 carbon-manganese-silicon steel, quenched and tempered A537/A537M 2
1/2 CR 1/2 % chromium, 1/2 % molybdenum steel A387/A387M 2 201
1 CR 1 % chromium, 1/2 % molybdenum steel A387/A387M 12 201
1 1/4 CR 1 1/4 % chromium, 1/2 % molybdenum steel A387/A387M 11 201
2 1/4 CR 2 1/4 % chromium, 1 % molybdenum steel A387/A387M 22 201
3 CR 3 % chromium, 1 % molybdenum steel A387/A387M 21 201
5 CR 5 % chromium, 1/2 % molybdenum steel A387/A387M 5 225
9 CR 9 % chromium, 1 % molybdenum steel A387/A387M 9 241
91 9 % chromium, 1 % molybdenum, vanadium, columbium A387/A387M 91 241

Chemical Composition Of ASTM A691 Seamless Pipe?

1CR 1-1/4CR 2-1/4 CR 5 CR 9 CR 91
C 0.05-0.17 0.05-0.17 0.05-0.15 0.15 0.15 0.08-0.12
Mn 0.40-0.65 0.40-0.65 0.30-0.60 0.30-0.60 0.30-0.60 0.30-0.60
P 0.025 0.025 0.025 0.025 0.025 0.020
S 0.025 0.025 0.025 0.025 0.025 0.010
Si 0.15-0.40 0.50-0.80 0.50 0.50 1.00 0.20-0.50
Cr 0.80-1.15 1.00-1.50 2.00-2.50 4.00-6.00 8.00-10.00 8.00-9.50
Mo 0.45-0.60 0.45-0.65 0.90-1.10 0.45-0.65 0.90-1.10 0.85-1.05
V – – – – 0.04 0.18-0.25

Mechanical Properties Of ASTM A691 Seamless Pipe?

Class Heat Treatment on Pipe Section see: Radiography, see Section Pressure Test, see :
10 none none none
11 none 9 none
12 none 9 8.3
13 none none 8.3
21 stress relieved, see 6.3.1 none none
21 stress relieved, see 6.3.1 9 none
ASTM A691 Class 22 stress relieved, see 6.3.1 9 8.3
23 stress relieved, see 6.3.1 none 8.3
31 normalized, see 6.3.2 none none
31 normalized, see 6.3.2 9 none
32 normalized, see 6.3.2 9 8.3
33 normalized, see 6.3.2 none 8.3
40 normalized and tempered, see 6.3.3 none none
43 normalized and tempered, see 6.3.3 9 none
43 normalized and tempered, see 6.3.3 9 8.3
43 normalized and tempered, see 6.3.3 none 8.3
50 quenched and tempered, see 6.3.4 none none
51 quenched and tempered, see 6.3.4 9 none
52 quenched and tempered, see 6.3.4 9 8.3
53 quenched and tempered, see 6.3.4 none 8.3
60 normalized and precipitation heat none none treated none none
61 normalized and precipitation heat none none treated 9 none
62 normalized and precipitation heat none none treated 9 8.3
63 normalized and precipitation heat none none treated none 8.3
70 normalized and precipitation heat none none treated none none
71 normalized and precipitation heat none none treated 9 none
72 normalized and precipitation heat none none treated 9 8.3
73 normalized and precipitation heat none none treated none 8.3

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