ASTM A691 Grade 91 Alloy Steel EFW Pipes
ASTM A691 Grade 91 ASTM A691 Grade 91 Alloy Steel EFW Pipes are specially designed for use in high-pressure and high-temperature environments. These pipes are widely used in industries like oil and gas, power generation, and chemical processing due to their strength and durability. The manufacturing process starts with high-quality pressure vessel plates that offer excellent mechanical properties and resistance to extreme conditions. These plates are selected carefully to ensure the final product meets strict industry standards. The pipes are made using the Electric Fusion Welding (EFW) process, which creates strong, seamless joints by melting and fusing the edges of the plates using electric current. This method ensures high structural integrity and allows the pipes to handle intense pressure and stress. To guarantee performance, the pipes go through strict testing like hydrostatic testing for pressure resistance and non-destructive methods such as ultrasonic and radiographic inspection to check weld quality. These tests ensure the pipes are safe and reliable for demanding applications. Thanks to their alloy composition, these pipes also offer excellent resistance to heat, oxidation, and corrosion. This makes ASTM A691 Grade 91 EFW Pipes a dependable choice for long-term use in tough industrial environments. Table of Contents ASTM A691 Pipe Price in India ASTM A691 Pipe Equivalent ASTM A691 Pipe Specifications ASTM A691 Chemical Composition ASTM A691 Mechanical Properties Heat Treatment Tensile Requirements ASTM A691 Pipe Price in India (USD $/Ton) Size MSL Make ISMT Make JSL Make 1.5″ 3,750.00 3,742.65 3,757.35 1″ 3,897.06 3,889.71 3,904.41 1/2″ 4,264.71 4,257.35 4,272.06 1.25″ 3,852.94 3,845.59 3,860.29 3/4″ 4,044.12 4,036.76 4,051.47 Note: Prices applicable for SCH 40, SCH 60, SCH 80 & SCH XS. ASTM A691 Pipe Equivalent Grades Pipe Grade Type of Steel ASTM Specification Grade HB max 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 1 CR 1% Chromium, 0.5% Molybdenum Steel A387/A387M 12 201 2-1/4 CR 2.25% Chromium, 1% Molybdenum Steel A387/A387M 22 201 5 CR 5% Chromium, 0.5% Molybdenum Steel A387/A387M 5 225 9 CR 9% Chromium, 1% Molybdenum Steel A387/A387M 9 241 91 Chromium-Molybdenum-Vanadium Alloy A387/A387M 91 241 ASTM A691 Pipe Specifications Grades: 1CR, 1-1/4CR, 2-1/4CR, 3CR, 5CR, 9CR, 91, CM65, CM70, CM75 Sizes: 1/2” NB to 36” NB Wall Thickness: 3mm to 12mm Type: Seamless / ERW / Welded / Fabricated / LSAW End Type: Plain, Beveled, Threaded Form: Round, Square, Rectangular, Hydraulic Length: Standard, Double Random, Cut Length Manufacturing Origin: Indian, European, US, Korean, Japanese (No Chinese origin) Special Testing: NACE MR0175, HIC Test, SSC Test, IBR, H2 Service ASTM A691 Chemical Composition Element 1CR 1-1/4CR 2-1/4CR 5CR 9CR 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 Grade 91 also includes: Ni ≤ 0.40%, Nb 0.06–0.10%, N 0.030–0.070%, Al ≤ 0.02%, Ti ≤ 0.01%, Zr ≤ 0.01% ASTM A691 Mechanical Properties Grade Tensile Strength (MPa) Yield Strength (MPa) Elongation (50mm) Reduction of Area* 1CR 380 – 550 230 min 22% min – 1-1/4CR 415 – 585 240 min 22% min – 2-1/4CR 415 – 585 205 min 18% min 40% min 5CR 415 – 585 205 min 18% min 40% min 9CR 415 – 585 205 min 18% min 40% min 91 415 – 585 205 min 18% min 40% min Heat Treatment Summary CM Grades (65–75): Stress relieved at 1100–1200°F, Normalized at 1700°F 1/2CR – 3CR: Normalizing temp: 1850°F, Quenching: 1700°F, Tempering: up to 1375°F 5CR – 9CR: Normalizing at 1850°F, Tempering at 1300–1375°F 91: Complex heat treatment with Tempering at 1350–1440°F and minimum quenching at 1900°F Applications Industry Use: Oil & Gas, Power Plants, Refineries Common Usage: Steam pipelines, heat exchangers, boiler tubes, pressure vessels Strengths: Excellent creep strength, oxidation resistance, and ability to handle high pressure and temperature These pipes are highly valued for their reliable performance and compliance with global standards. Their manufacturing process involves stringent quality control, and they are available in a wide variety of grades and specifications to suit different industrial needs. For more information or specific grade inquiries, feel free to reach out to your ASTM A691 pipe supplier or stockist. Ready to Ship, Wherever You Are Need reliable supplies for your next big project? Whether you’re based in the india or shipping internationally, we’re here to make sourcing simple. We supply across the USA, Canada, Australia, Germany, Brazil , and United Kingdom.Fast quotes, custom sizes, and bulk orders available. Let us know what you need—we’ll take care of the rest. 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