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ASTM A691 1 1/4CR Alloy Steel Pipe

Standard and Grades: ASTM A691 1-1/4CR

Sizes: 16” to 60”

Wall thickness: SCH 40, SCH STD, SCH 80, SCH XS, SCH 160, up to 3 inch

Length: 6 meters, 12 meters or customized.

Surface treatment: Painted, Natural, 3PE, FBE

Ends: PE (Plain End), BE (Beveled Ends)

Professional  ASTM A691 1 1/4 CR Alloy Steel Pipe Supplier

ASTM A691 2-1/4CR Pipe SpecificationASTM A691 1 1/4 CR Alloy Steel Pipe is often used in industrial applications and considered best due to features like enhanced strength, hardness, hardenability, corrosion resistance, and toughness. Manufacturers supply high-quality of alloy steel pipes and tubes to aerospace, medical high high-purity and many more. ASTM A691 1-1/4CR grade covers welded pipe, fabricated pipe, and seamless pipe.

These pipes are also available in different forms such as rectangular, square, pancake coils, and round pipes. Grade available for this pipe is ASTM A691 1-1/4CR and meets both international and national standards like ASTM A691, ASME SA691 etc. The size of these pipes ranges from ½ NB to 24 NB, and wall thickness is scheduled through SCH30, SCH40, SCH80, XXS, XS, etc. The length of these pipes is single random, cut length and double random. Pipe ends are plain, threaded, or beveled. They are manufactured using the best quality of material and other steel products so as to keep these steel pipes withstand harsh and extreme temperatures and environments.

These pipes are manufactured with several heat treatments, where steel is refined and mixed with other chemical components. To sustain the quality of ASTM A691 1-1/4CR Pipe, they are inspected and tested through hardness test, flaring test, bend test, spectral test, ultrasonic test etc. Moreover, these pipes are packed and delivered in wooden boxes or plastic bags until its last stage of production.

ASTM A691 1 1/4 CR Pipe Specification

Grade Alloy Steel A691 GR Gr.1 1/4 CR
Specification ASTM A691 / ASME SA691
Size 1/2” NB – 24” NB
Thickness SCH20, SCH30, SCH40, STD, SCH80, XS, SCH60, SCH80, SCH120, SCH140, SCH160, XXS
Type Seamless / ERW / Welded / Fabricated / LSAW Pipes
Form Round, Square, Rectangular, Hydraulic Etc
Length Single Random, Double Random & Cut Length.
End Plain End, Beveled End, Treaded

ASTM A691 1-1/4 CR Pipe Application

  • Oil and Gas equipments
  • Offshore Technology
  • Seawater Desalination Plants
  • Chemical Industry
  • Airport, Malls, Buildings
  • Storage Tanks
  • Medical Industry
  • Civil Engineering
  • Pressure vessels, Reactor tanks, and Heat exchangers
  • Rotors, impellers and shafts
  • Power Plants
  • Petrochemical
  • Shipbuilding Industry
  • Mining Industry
  • Food Equipments Industry
Specification Parameters
Basic Information

ASTM A691 1-1/4 CR Pipes chemical composition

ASTM A691 Grade 1 1/4CR
C 0.05-0.17
Mn 0.40-0.65
P 0.025
S 0.025
Si 0.50-0.80
Cr 1.00-1.50
Mo 0.45-0.65

ASTM A691 1-1/4 CR Pipes Mechanical Properties

ASTM A691 Grade 1 1/4CR
Tensile (MPa) 515 – 690
Yield (MPa) 310 min
Elong. (50 mm) 22% min
Reduc’n of Area*

ASTM A691 1-1/4 CR Alloy Steel EFW Pipes Class Designation

Class Heat Treatment on Pipe Radiography, see Section Pressure Test, see:
A691 / SA691 1-1/4CR EFW Pipe Class 10 none none none
A691 / SA691 1-1/4CR EFW Pipe Class 11 none 9 none
A691 / SA691 1-1/4CR EFW Pipe Class 12 none 9 8.3
A691 / SA691 1-1/4CR EFW Pipe Class 13 none none 8.3
A691 / SA691 1-1/4CR EFW Pipe Class 20 stress relieved, see 5.3.1 none none
A691 / SA691 1-1/4CR EFW Pipe Class 21 stress relieved, see 5.3.1 9 none
A691 / SA691 1-1/4CR EFW Pipe Class 22 stress relieved, see 5.3.1 9 8.3
A691 / SA691 1-1/4CR EFW Pipe Class 23 stress relieved, see 5.3.1 none 8.3
A691 / SA691 1-1/4CR EFW Pipe Class 30 normalized, see 5.3.2 none none
A691 / SA691 1-1/4CR EFW Pipe Class 31 normalized, see 5.3.2 9 none
A691 / SA691 1-1/4CR EFW Pipe Class 32 normalized, see 5.3.2 9 8.3
A691 / SA691 1-1/4CR EFW Pipe Class 33 normalized, see 5.3.2 none 8.3
A691 / SA691 1-1/4CR EFW Pipe Class 40 normalized and tempered, see 5.3.3 none none
A691 / SA691 1-1/4CR EFW Pipe Class 41 normalized and tempered, see 5.3.3 9 none
A691 / SA691 1-1/4CR EFW Pipe Class 42 normalized and tempered, see 5.3.3 9 8.3
A691 / SA691 1-1/4CR EFW Pipe Class 43 normalized and tempered, see 5.3.3 none 8.3
Service Support
ASTM A691 1 1/4CR Alloy Steel Pipe

Test Certificates

We ASTM A691 1-1/4CR Pipe with the following details Mill Test Certificate according to EN 10204 3.1, PMI Test, Test Report from NABL Approved Lab, 3.2 Certification by External Testing Authority third, ultrasonic test report, and X-ray report.

Quality Assurance

At ASTM A691 1-1/4CR Pipe all types of Such as 3CR, 5CR, 9CR, 91 from raw material purchase to production and product shipping. They are visually inspected for compliance with ASTM, ASME, DIN, EN and JIS codes and standards. We can also designate certified official testing agencies upon customer request so that they can witness the product’s material, size and quality compliance reports.

Marking & Packing

Our ASTM A691 1-1/4CR Pipe is packaged to ensure no damage during transit. In the case of export, the standard export packing is in a wooden box. All ASTM A691 1-1/4CR Pipe are marked with our grade, batch number, size and mark. We can also do custom branding on our products as per buyer’s unique requirements