ASTM A691 / ASME SA 691 Gr.91 Welded Pipes

Nitron Alloys Overseas is one of the most reputed suppliers, manufacturer and exporter of ASTM A691 / ASME SA691 Grade 91 Alloy Steel Welded Pipe that is being made up from Premium Quality. All the national and international standard ASTM/ASME Specifications are followed by our manufacturing team while developing these alloy steel welded pipes. These welded pipes contain a combination of Copper, silicon, phosphorus, nickel and chromium content in grade 91 alloy steel welded pipe. These welded pipes are being added tremendous features such as high corrosion resistance in it. However, the presence of calcium, zirconium and uncommon earth constituents in ASME SA691 Grade 91 Alloy Steel Welded Pipe are being added for sulfide-inclusion shape control that boosts the formability of welded pipe.

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At, Nitron Alloys Overseas our engineers have designed each and every welded pipe according to the set manufacturing norms set by the international industries. We do offer customized, and non-customized length sizes and shapes to our esteemed clients. We also provide these welded pipes at the best possible rates in the market.

We, Nitron Alloys Overseas, are supplying a wide range of ASTM A691 / ASME SA691 Grade 91 Alloy Steel Welded Pipe to the domestic as well as international clients. We are manufacturing these welded pipes in bulk amount in our high-tech manufacturing firm and warehouses. We provide urgent deliveries to our customers. Our team members are always checking the manufacturing firm strictly to avoid any kind of defects. We store a ready stock of these pipes to ensure immediate delivery. We are the most versatile and widely supplier of these welded pipes.

We, Nitron Alloys Overseas is also performing destructive and non-destructive quality tests on finished ASTM A691 / ASME SA691 Grade 91 Alloy Steel Welded Pipe before delivery to ensure no poor quality products are supplied to our esteem clients. We provide all the essential reports and documents to our clients along with the product at the time of shipments. And then we are wrapping these ASME SA691 ALLOY STEEL WELDED PIPE with suitable material to protect from damage during the delivery and providing on time damage free delivery to our clients.


ASTM A691 alloy steel grade 91 welded pipes specification typically includes the nominal pipe size, schedule, or wall thickness & length. Depending on the application requirements, the pipes can range from small diameters to larger sizes. Selecting the appropriate pipe dimensions based on the specific project needs is important.

ASTM A691 alloy steel grade 91 welded pipes have excellent high-temperature capabilities. They can withstand elevated temperatures up to approximately 600°C (1112°F) while maintaining their mechanical properties. The pressure limits depend on the pipe dimensions, wall thickness & specific design standards.

ASME SA691 Grade 91 alloy steel welded pipes have been specifically designed for welding applications. They possess good weldability & allow for easy welding using common welding techniques such as gas tungsten arc welding (GTAW) or shielded metal arc welding (SMAW).

Specification of ASTM A691 / ASME SA691 Alloy Steel Gr.91 Welded Pipes

Spec bag
Specifications : ASTM A691 / ASME SA691
Dimension Standard : ANSI B36.19M, ANSI B36.10
Welded Pipe Range : 1/2~24,24~80 inch
Wall Thickness : 2mm TO 100mm
Length : 5 To 7 Meters, 09 To 13 Meters, Single Random Length, Double Random Length And Customize Size.
End : Plain End, Beveled End, Treaded

Types of ASTM A691 / ASME SA691 Alloy Steel Gr.91 Welded Pipes

Alloy Steel Gr.91 Welded Pipes

Welded Pipes

  • - ASTM A691 Gr.91 Welded Pipes
  • - A691 Gr 91 Chromium Molybdenum Steel Welded Pipes
  • -SA691 Cr-Mo Grade 91 Welded Pipes
  • - ASME SA691 Grade 91 Alloy Steel Welded Pipe
  • - SA691 CrMo Grade 91 Welded Pipes
  • - ASTM A691 Alloy Steel Gr.91 Welded Pipes Supplier
  • - A691 Alloy Steel Grade 91 Welded Pipe Manufacturer
Alloy Steel Gr.91 ERW Pipes

ERW Pipes

  • - ASTM A691 Gr.91 ERW Pipes
  • - A691 Gr 91 Chromium Molybdenum Steel ERW Pipes
  • -SA691 Cr-Mo Grade 91 ERW Pipes
  • - ASME SA691 Grade 91 Alloy Steel ERW Pipe
  • - SA691 CrMo Grade 91 Electric Resistance Welded Pipes
  • - ASTM A691 Alloy Steel Gr.91 ERW Pipes Supplier
  • - A691 Alloy Steel Gr 91 Electric Resistance Welded Pipes Manufacturer

ASTM A691 / ASME SA691 Alloy Steel Gr.91 Welded Pipes Chemical Composition

Grade C, % Mn, % P, % S, % Si, % Cr, % Mo, % V,%
9 CR 0.08-0.12 0.30-0.60 0.020 0.010 0.20-0.50 8.00-9.50 0.85-1.05 0.18-0.25

Mechanical Properties of ASTM A691 / ASME SA691 Alloy Steel Gr.91 Welded Pipe

Grade Tensile Strength, MPa Yield Strength, MPa Elongation, %
Class 2 585 - 760 415 min 18

Application Industries

  • Refineries
  • Petrochemicals Industry
  • Oil & Gas Industry
  • Mining
  • Construction
  • Pharmaceuticals
  • Automobile