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ASTM A691 Grade 91 Alloy Steel Pipes

ASTM A691 GRADE 91 Alloy Steel Pipes, ASME SA 691 Gr.91 Pipes, ASTM A691 Gr.91 Alloy Steel Welded Pipes Manufacturers and Suppliers

KOBSINDIA is one of the leading Manufacturer, Stockers, Dealers, Distributors, Traders, Supplier and Exporter of ASTM A691 GRADE 91 Alloy Steel Pipes that is being made up from High Quality of Standard Raw Materials.ASTM A691 GRADE 91 Alloy Steel Pipe has some common alloying elements such as manganese, silicon, molybdenum, vanadium, chromium and nickel. These elements in ASTM A691 Alloy Steel Pipe GRADE 91 are being added to enhance the toughness and strength, for to increase or decrease the response to heat treatment, and also to hold back corrosion and rusting. Meanwhile, some examples of the uses of our these ASTM A691 Alloy Steel Pipe include chassis members, door-intrusion beams, mounting and reinforcing brackets, suspension and steering components, wheels and bumpers.

Designed as per international and national standards, these Alloy Steel ASTM A691 GRADE 91 Seamless Pipes are offered in customized length sizes and shapes to our esteemed clients. We also offer the same at best possible rates in the market.

ASTM A691 Gr.91 Alloy Steel High Pressure Pipes, A691 Gr.91 Alloy Steel Fabricated Pipes, Alloy Steel ASTM A691 GRADE 91 EFW Electric Fusion Welded Pipes traders in Qatar, Alloy Steel A691 GRADE 91 Seamless Pipes Suppliers in India.

KOBSINDIA is World Renowned Supplier of ASTM A691 91 Alloy Steel EFW Pipes. Among the Largest Stockist & Stockholder of Alloy Steel EFW Pipes in India. Leading Exporter of A691 91 Alloy Steel EFW Pipes in Integrated Partnership with Top A691 91 Alloy Steel EFW Pipes Manufacturers. Genuine Dealer of ASTM A691 91 Alloy Steel EFW Pipes in USA, European and Japanese Origins. We are the Prominent Trusted Source for ASTM A691 91 Alloy Steel EFW Pipes to be used in World Class Projects. We are the Top EPC Contractor's First Choice for A691 91 Alloy Steel EFW Pipeswith Large Ready Stock Inventory above 25000 Metric Tons.

Alloy steel is steel that is alloyed with a variety of elements in total amounts between 1.0% and 50% by weight to improve its mechanical properties. Alloy steels are broken down into two groups: low-alloy steels and high-alloy steels. The difference between the two is somewhat arbitrary: Smith and Hashemi define the difference at 4.0%, while Degarmo, et al., define it at 8.0%.[1][2] Most commonly, the phrase "alloy steel" refers to low-alloy steels.

Strictly speaking, every steel is an alloy, but not all steels are called "alloy steels". The simplest steels are iron (Fe) alloyed with carbon (C) (about 0.1% to 1%, depending on type). However, the term "alloy steel" is the standard term referring to steels with other alloying elements added deliberately in addition to the carbon. Common alloyants include manganese (the most common one), nickel, chromium, molybdenum, vanadium, silicon, and boron. Less common alloyants include aluminum, cobalt, copper, cerium, niobium, titanium, tungsten, tin, zinc, lead and zirconium.

This specification covers steel pipe, electric-fusion-welded with filler metal added, fabricated from pressure-vessel quality plate of any of service analyses and strength levels and suitable for high-pressure service at moderate temperatures. Heat treatment may or may not be required to attain the desired properties or to comply with applicable code requirements. Supplementary requirements are provided for use when additional testing or examination is desired.

KOBSINDIA is a leading brand in the market of Steel products and exports and one of our known products include ASTM A691 GRADE 91 Alloy Steel Pipe. The most useful properties of ASTM A691 GRADE 91 Alloy Steel Pipe, which make them efficient include features like enhanced strength, toughness, hardness, hardenability, wear resistance, corrosion resistance and hot hardness and our product has been manufactured to provide them all.

ASTM A691 91 ALLOY steel EFW PIPEs Range

ASTM A691 91 Alloy Steel EFW Pipes Specification
ASTM A691 / ASME SA691
ASTM A691 91 Alloy Steel EFW Pipes Grades
ASTM A691 1-1/4CR, ASTM A691 2-1/4CR, ASTM A691 3CR, ASTM A691 5CR, ASTM A691 9CR, ASTM A691 91, ASME SA691 1-1/4CR, ASME SA691 2-1/4CR, ASME SA691 3CR, ASME SA691 5CR, ASME SA691 9CR, ASME SA691 91
ASTM A691 91 Alloy Steel EFW Pipes Type
EFW (ELECTRIC FUSION WELDED PIPES)
ASTM A691 91 Alloy Steel EFW Pipes Class Designation
CLASS 10, ,11, 12, 13, 20, 21, 22, 23, 30, 31, 32, 33, 40, 41, 42, 43
ASTM A691 91 Alloy Steel EFW Pipes Outer Diameter Size
16" NB To 100" NB (Nominal Bore Size)
ASTM A691 91 Alloy Steel EFW Pipes Wall Thickness
Schedule 20 To Schedule XXS (Heavier On Request) Up to 75 mm Thickness
ASTM A691 91 Alloy Steel EFW Pipes Length
5 To 7 Meters, 09 To 13 Meters, Single Random Length, Double Random Length And Customize Size.
ASTM A691 91 Alloy Steel EFW Pipes Ends
Plain Ends / Beveled Ends / Coupling
ASTM A691 91 Alloy Steel EFW Pipes Delivery Conditions
As Rolled, Normalizing Rolled, Thermomechanical Rolled / Formed, Normalizing Formed, Normalized and Tempered / Quenched and Tempered - BR / N / Q /T
ASTM A691 91 Alloy Steel EFW Pipes Coating
Epoxy Coating / Colour Paint Coating / 3LPE Coating.
ASTM A691 91 Alloy Steel EFW Pipes Other Testing
NACE MR0175, NACE TM0177, NACE TM0284, Charpy V-Notch Test, Radiographic Examination, XRAY, Ultrasonic EXAMINATION, Liquid Penetrant, Magnetic Particle, HIC Test, SSC Test, SWC, H2 Service, IBR, PWHT Etc.
ASTM A691 91 Alloy Steel EFW Pipes Dimension
All Pipes Is Manufactured and Inspected / Tested to the Relevant standards including ASTM, ASME, API.
ASTM A691 91 Alloy Steel EFW Pipes Value Added Services
Draw / Expansion / Machining / Sand Blasting / Shot Blasting / Galavanizing / Heat Treatment
ASTM A691 91 Alloy Steel EFW Pipess Packaging
Loose / Bundle / Wooden Pallet / Wooden Box / Plastic Cloth Wraps / Plastic End Caps / Beveled Protector
ASTM A691 91 Alloy Steel EFW Pipes Shipment & Transportation
By Road - Truck / Train, By Sea - Break-bulk Conventional Vessel / FCL (Full Container Load) / LCL (Less Container Load) / 20 Feet Container / 40 Feet Container / 45 Feet Container / High Cube Container / Open Top Container, By Air - Freighter Civil Passenger and Cargo Planes
ASTM A691 91 Alloy Steel EFW Pipes Material Test Certificate
Manufacturer Test Certificate As Per EN10204 3.1, 3.2 / Laboratory Test Certificate From NABL Approved Lab. / Under Third Party Inspection Agency Like SGS, TUV, DNV, LLOYDS, ABS ETC

ASTM A691 91 Alloy Steel Efw Pipes Class Designation

Class Heat Treatment on Pipe Radiography, see Section Pressure Test, see:
A691 / SA691 EFW Pipe Class 10 none none none
A691 / SA691 EFW Pipe Class 11 none 9 none
A691 / SA691 EFW Pipe Class 12 none 9 8.3
A691 / SA691 EFW Pipe Class 13 none none 8.3
A691 / SA691 EFW Pipe Class 20 stress relieved, see 5.3.1 none none
A691 / SA691 EFW Pipe Class 21 stress relieved, see 5.3.1 9 none
A691 / SA691 EFW Pipe Class 22 stress relieved, see 5.3.1 9 8.3
A691 / SA691 EFW Pipe Class 23 stress relieved, see 5.3.1 none 8.3
A691 / SA691 EFW Pipe Class 30 normalized, see 5.3.2 none none
A691 / SA691 EFW Pipe Class 31 normalized, see 5.3.2 9 none
A691 / SA691 EFW Pipe Class 32 normalized, see 5.3.2 9 8.3
A691 / SA691 EFW Pipe Class 33 normalized, see 5.3.2 none 8.3
A691 / SA691 EFW Pipe Class 40 normalized and tempered, see 5.3.3 none none
A691 / SA691 EFW Pipe Class 41 normalized and tempered, see 5.3.3 9 none
A691 / SA691 EFW Pipe Class 42 normalized and tempered, see 5.3.3 9 8.3
A691 / SA691 EFW Pipe Class 43 normalized and tempered, see 5.3.3 none 8.3

ASTM A691 91 Plate Material

Pipe Grade Type of Steel ASTM Specification HB, max A
      Number Grade   
CM-65 carbon-molybdenum steel A 204/ A204M A 201
CM-70 carbon-molybdenum steel A 204/ A204M B 201
CM-75 carbon-molybdenum steel A 204/ A204M C 201
CMSH-70 carbon-manganese-silicon steel, normalized A 537/A 537M 1   
CMS-75 carbon-manganese-silicon steel A 299/A 299M  …  …
CMSH-80 carbon-manganese-silicon steel, quenched and tempered A 537/A 537M 2   
1/2 CR 1/2 % chromium, 1/2 % molybdenum steel A 387/ A 387M 2 201
1CR 1 % chromium, 1/2 % molybdenum steel A 387/ A 387M 12 201
1-1/4 CR 1-1/4 % chromium, 1/2 % molybdenum steel A 387/ A 387M 11 201
2-1/4 CR 2-1/2 % chromium, 1 % molybdenum steel A 387/ A 387M 22 201
3CR 3 % chromium, 1 % molybdenum steel A 387/ A 387M 21 201
5CR 5 % chromium, 1/2 % molybdenum steel A 387/ A 387M 5 225
9CR 9 % chromium, 1  % molybdenum steel A 387/ A 387M 9 241
91 91 % chromium, 1 % molybdenum steel A 387/ A 387M 91 241

ASTM A691 91 Alloy steel EFW pipe heat treatment parameters

Pipe Grade ASTM Specification Post-Weld Heat-Treat Temperature Range (Strees Relieving), F ( C ) Normalizing Temperature, max unless otherwise noted, F ( C ) Quenching Temperature, max unless otherwise noted, F ( C ) Tempering Temperature, min, F ( C )
CM-65 A204/ A204M 1100 to 1200 (590 to 650) 1700 (925)  …  …
CM-70 A204/ A204M 1100 to 1200 (590 to 650) 1701 (925)  …  …
CM-75 A204/ A204M 1100 to 1200 (590 to 650) 1702 (925)  …  …
CMSH-70 A537/A 537M 1100 to 1200 (590 to 650) 1703 (925)  …  …
CMS-75 A 299/A 299M 1100 to 1200 (590 to 650) 1704 (925)  …  …
CMSH-80 A537/A 537M 1100 to 1200 (590 to 650) A 1700 (925) 1100 to 1250 (590 to 675)
1/2 CR A387 / A387M 1100 to 1300 (590 to 705) 180 (1010) 1700 (925) 1150 to 1375 (620 to 745)
1CR A387 / A387M 1100 to 1350 (590 to 730) 181 (1010) 1700 (925) 1150 to 1375 (620 to 745)
1-1/4 CR A387 / A387M 1100 to 1375 (590 to 745) 182 (1010) 1700 (925) 1150 to 1375 (620 to 745)
2-1/4 CR A387 / A387M 1200 to 1400 (650 to 760) 183 (1010) 1700 (925) 1250 to1400 (675 to 760)
3CR A387 / A387M 1200 to 1400 (650 to 760) 184 (1010) 1700 (925) 1250 to1400 (675 to 760)
5CR A387 / A387M 1200 to 1400 (650 to 760) 185 (1010) 1700 (925) 1300 to 1400 (705 to 760)
9CR A387 / A387M 1325 to 1375 (715 to 745) B  … 1325 to 1375 (715 to 745)
91 A387 / A387M 1350 to 1420 (730 to 770) 1350 to 1420 (730 to 770) 1900 min (1040 min) 1350 to 1440 (730 to 780)

Wall Thickness & Tolerance

ASTM A450 Hot rolled Outside Diameter, mm Tolerance, %
OD≤101.6, WT≤2.4 +40/-0
OD≤101.6, 2.4<WT≤3.8 +35/-0
OD≤101.6, 3.8<WT≤4.6 +33/-0
OD≤101.6, WT>4.6 +28/-0
OD>101.6, 2.4<WT≤3.8 +35/-0
OD>101.6, 3.8<WT≤4.6 +33/-0
OD>101.6, WT>4.6 +28/-0
Cold Drawn Outside Diameter, mm Tolerance, %
OD≤38.1 +20/-0
OD>38.1 +22/-0
ASTM A530 NPS Outside Diameter, inch Tolerance, %
1/8≤OD≤2-1/2 +20.0/-12.5
3≤OD≤18, WT/OD≤5% +22.5/-12.5
3≤OD≤18, WT/OD>5% +15.0/-12.5
OD≥20, WT/OD≤5% +22.5/-12.5
OD≥20, WT/OD>5% +15.0/-12.5

ASTM A691 GRADE 91 Alloy Steel Pipes

A691 Gr.91 Alloy Steel EFW Pipes for High-Pressure Service at High Temperatures

ASME SA 691 Gr.91 Pipes

ASTM A691 Gr.91 Alloy Steel Seamless Pipes

ASTM A691 Gr.91 Pipes

ASTM A691 Gr.91 Alloy Steel EFW Pipes

Gr.91 A691 Alloy Steel Piping

ASTM A691 Gr.91 Alloy Steel Welded Pipes

A691 Gr.91 Alloy Steel Fabricated Pipes

ASTM A691 Gr.91 Ferritic Alloy Steel Pipes

A691 Gr.91 High Temperature Alloy Steel Pipes

Alloy Steel A691 Gr.91 High Pressure Pipes

ASTM A691 Gr.91 Alloy Steel SAW Pipes

ASTM A691 Gr.91 Chrome Moly Alloy Pipes

ASTM A691 Gr.91 Alloy Steel LSAW Pipes

ASTM A691 Gr.91 Alloy Steel Round Pipes

ASTM A691 Gr.91 Alloy Steel Square Pipes

ASTM A691 Gr.91 Alloy Steel Rectangular Pipes

ASTM A691 Gr.91 Chrome Moly Pipes

Gr.91 A691 Alloy Steel Pipes

ASTM A691 Gr.91 AS Pipes

KOBSINDIA exports Alloy Steel Seamless Pipes to countries like UAE, Bahrain, Italy, Indonesia, Malaysia, United States, Mexico, Chine, Brazil, Peru, Nigeria, Kuwait, Jordan, Dubai, Thailand (Bangkok), Venezuela, Iran, Germany, UK, Canada, Russia, Turkey, Australia, New Zealand, Sri Lanka, Vietnam, South Africa, Kazakhstan & Saudi Arabia.

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