ASTM A691 / ASME SA 691 Gr.1 1/4CR Welded Pipes

Welded pipes are important in various industries, including energy, construction, and manufacturing. Selecting the right type and quality of welded pipes is crucial for demanding applications. ASME SA 691 GR.1 1 Welded Pipes are classified according to their properties and composition. One of the types available is the low-alloy steel welded pipe. They have a carbon content of less than 5%. Their alloying elements include nickel, chromium, molybdenum, and vanadium.

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The low-alloy steel pipes have excellent corrosion resistance, strength and toughness, and weldability. Another type of 4CR Alloy Steel Welded Pipe is the high-strength low-alloy steel welded pipe. They contain more alloying elements like manganese, silicon, copper, and phosphorus. The high-strength low-alloy steel welded pipes are characterized by high tensile strength, corrosion resistance, wear resistance, and impact resistance.
ASME SA 691 GR.1 1 welded pipes have different applications, depending on their type. The low-alloy steel welded pipes are useful in constructing pipelines, pressure vessels, and equipment used in oil and gas, petrochemical, and chemical plants. They can also be used in mining and offshore applications where corrosion and erosion resistance are essential. The high-strength low-alloy steel welded pipes are widely used in the aerospace, automotive, and shipbuilding industries. They are also applied in construction, agriculture, and material handling.

Aside from their specific applications, ASME SA 691 GR.1 1 welded pipes offer several benefits. These benefits differ depending on the type of welded pipe and its application. The low-alloy steel welded pipes are generally cost-effective, durable, and easy to fabricate. They are also easier to weld and less prone to cracking. On the other hand, high-strength low-alloy steel welded pipes have superior strength, wear resistance, and toughness. They also have excellent machinability and weldability. Both types of welded pipes have low carbon content, making them suitable for applications that require low emissions.


ASTM A691 Grade 1 Welded Pipe is available in various sizes ranging from 2 inches to 48 inches in diameter and in wall thicknesses from 3.91 mm to 31.75 mm.

The maximum temperature for ASME SA691 Grade 1/4CR Welded Pipe is 593°C (1100°F).

The standard length of ASME SA691 Grade 1/4CR Welded Pipe is 6 meters (20 feet). However, it can be cut to any desired length upon request.

ASTM A691 / ASME SA691 Alloy Steel Gr.1 1/4 CR Welded Pipes Chemical Composition

Grade C, % Mn, % P, % S, % Si, % Cr, % Mo, %
1 1/4 CR 0.05-0.17 0.40-0.65 0.025 max 0.025 max 0.50-0.80 1.00-1.50 0.45-0.65

Mechanical Properties of ASTM A691 / ASME SA691 Alloy Steel Gr.1 1/4CR Welded Pipe

Grade Tensile Strength, MPa Yield Strength, MPa Elongation, %
1-1/4 CR 415-585 ≥240 ≥22

Specification of ASTM A691 / ASME SA691 Alloy Steel Gr.1 1/4 CR 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.1 1/4CR Welded Pipes

Alloy Steel Gr.1 1/4CR Welded Pipes

ASTM A691 / ASME SA691 Grade 1 1/4CR Welded Pipes

  • - ASTM A691 Gr.1 1/4CR Welded Pipes
  • - A691 Gr 1 1/4CR Chromium Molybdenum Steel Welded Pipes
  • -SA691 Cr-Mo Grade 1 1/4CR Welded Pipes
  • - ASME SA691 Grade 1 1/4CR Alloy Steel Welded Pipe
  • - SA691 CrMo Grade 1 1/4CR Welded Pipes
  • - ASTM A691 Alloy Steel Gr.1-1/4CR Welded Pipes Supplier
  • - A691 Alloy Steel Grade 1 1/4CR Welded Pipe Manufacturer
Alloy Steel Gr.1 1/4CR ERW Pipes

ASTM A691 / ASME SA691 Grade-1 1/4 CR ERW Pipes

  • - ASTM A691 Gr.1 1/4CR ERW Pipes
  • - A691 Gr 1 1/4CR Chromium Molybdenum Steel ERW Pipes
  • -SA691 Cr-Mo Grade 1 1/4CR ERW Pipes
  • - ASME SA691 Grade 1 1/4CR Alloy Steel ERW Pipe
  • - SA691 CrMo Grade 1 1/4CR Electric Resistance Welded Pipes
  • - ASTM A691 Alloy Steel Gr.1-1/4CR ERW Pipes Supplier
  • - A691 Alloy Steel Gr 1 1/4CR Electric Resistance Welded Pipes

Application Industries

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