ASTM A691 2-1/4Cr-1Mo EFW Alloy Steel Pipes are manufactured according to the international standards of quality and are designed for use at high pressures and temperatures in power plants, refineries and petrochemical units. 2-1/4Cr-1Mo Chrome-Moly steel grade is characterized by high strength to weight ratio and is resistant to the development of cracks under continuous tensile loading, thus being perfect for pressure retaining and structural purposes. Our range of ASTMA691 pipes is offered in different lengths, sizes and wall thicknesses to meet your project demands. All of our products pass through tests for size and mechanical properties to guarantee consistent quality. The pipes have strong and uniform joints due to their EFW structure. At Amardeep Steel Centre we offer ASTM A691 2-1/4Cr-1Mo EFW Alloy Steel Pipes of highest quality along with competitive prices and timely delivery all over India and worldwide.
Technical Data
Specifications of ASTM A691 2 1 4Cr 1Mo EFW Alloy Steel Pipe
| Parameter | Details |
|---|---|
| Standard | ASTM A691 |
| Grade | 2-1/4Cr-1Mo |
| Product Type | Electric Fusion Welded (EFW) Pipe |
| Material | Alloy Steel (Chrome Moly) |
| Size Range | ½” NB to 48” NB |
| Wall Thickness | Sch 10, Sch 20, Sch 40, Sch 80, Sch 160, XXS |
| Length | Single Random, Double Random, Custom Length |
| End Type | Plain End (PE), Beveled End (BE) |
| Surface Finish | Pickled, Polished, Shot Blasted |
| Heat Treatment | Normalized, Quenched & Tempered |
| Testing Methods | Hydrostatic Test, Radiography, Ultrasonic Testing |
| Applications | Power Plants, Refineries, Boilers, Heat Exchangers |
| Origin | India |
| Supply Condition | Ready Stock / Custom Production |
Chemical Composition of ASTM A691 2 1 4Cr 1Mo EFW Alloy Steel Pipe
| Element | Composition (%) |
|---|---|
| Carbon (C) | 0.05 – 0.15 |
| Chromium (Cr) | 2.00 – 2.50 |
| Molybdenum (Mo) | 0.90 – 1.10 |
| Manganese (Mn) | 0.30 – 0.60 |
| Silicon (Si) | 0.50 max |
ASTM A691 2 1 4Cr 1Mo EFW Alloy Steel Pipe Mechanical Properties
| Property | Value |
|---|---|
| Tensile Strength | 415 – 585 MPa |
| Yield Strength | ≥ 205 MPa |
| Elongation | ≥ 20% |
Applications Uses of ASTM A691 2 1 4Cr 1Mo EFW Alloy Steel Pipe
- Thermal Power Plants
- Oil Refineries
- Petrochemical Plants
- Chemical Processing Plants
- Fertilizer Plants
- Steel Manufacturing Plants
- Combined Cycle Power Plants
- Hydrogen Processing Units
Frequently Asked Questions
What is ASTM A691 2¼Cr-1Mo EFW Alloy Steel Pipe?
ASTM A691 2¼Cr-1Mo EFW Alloy Steel Pipe is an electric fusion welded alloy steel pipe designed for high-temperature and high-pressure applications.
What does 2¼Cr-1Mo mean in ASTM A691 pipe?
It refers to an alloy containing approximately 2.25% chromium and 1% molybdenum, providing excellent heat resistance and strength.
What are the applications of ASTM A691 2¼Cr-1Mo EFW Alloy Steel Pipe?
These pipes are widely used in power plants, oil refineries, petrochemical plants, boilers, and high-temperature process piping.
Is ASTM A691 2¼Cr-1Mo pipe suitable for high-temperature and high-pressure service?
Yes. It is specifically designed to perform reliably in demanding high-temperature and high-pressure environments.
What is the difference between ASTM A691 2¼Cr-1Mo and ASTM A335 P22 pipe?
ASTM A691 2¼Cr-1Mo is an electric fusion welded (EFW) pipe, while ASTM A335 P22 is a seamless alloy steel pipe with a similar chemical composition.
Is ASTM A691 2¼Cr-1Mo pipe seamless or welded?
ASTM A691 2¼Cr-1Mo is manufactured as an electric fusion welded (EFW) pipe.
