In case industries require toughness, endurance and high performance in challenging circumstances, ASTM A691 9Cr-1Mo EFW Alloy Steel Pipes provide a reliable option. Consisting of through the process of electric fusion welding (EFW) using chrome-moly (chromium-molybdenum) alloy steel, these pipes have been designed to work in high pressure under high temperatures, making them the best option for power plants, refineries, petrochemical plants and boilers. While chromium makes the pipes more oxidation-resistant and corrosion-resistant, molybdenum makes them stronger and creep-resistant under heat, thus Grade 9Cr-1Mo pipes make the perfect choice for challenging industrial environments. As a reputed manufacturer, Amardeep Steel Centre provides ASTM A691 9Cr-1Mo EFW Alloy Steel Pipes according to global standards, through strict quality testing and reliable performance.
Technical Data
Specification of ASTM A691 9Cr-1Mo EFW Alloy Steel Pipe
| Specification Parameter | Details |
|---|---|
| Standard | ASTM A691 / ASME SA691 |
| Pipe Types | EFW (Electric Fusion Welded Pipes) |
| Dimension Standard | Manufactured and inspected / tested to relevant standards including ASTM, ASME, API |
| Outer Diameter Size | 16" NB To 100" NB (Nominal Bore Size) |
| Wall Thickness | Schedule 20 To Schedule XXS (Heavier on request) up to 75 mm thickness |
| Length | 5 To 7 Meters, 09 To 13 Meters, Single Random Length, Double Random Length, and customized sizes |
| Pipe Ends | Plain Ends / Beveled Ends / Threaded Ends / Coupling |
| Delivery Conditions | As Rolled, Normalizing Rolled, Thermomechanical Rolled / Formed, Normalizing Formed, Normalized and Tempered / Quenched and Tempered (-BR / -N / -Q / -T) |
| ASTM A691 9CR Class | Class 10, 11, 12, 13, 20, 21, 22, 23, 30, 31, 32, 33, 40, 41, 42, 43, 50, 51, 52, 53 |
| Testing Methods | NACE TM0284, SWC, $H_2$ Service, NACE MR0175, IBR, Radiographic Examination (X-RAY), PWHT etc., Ultrasonic Examination, Liquid Penetrant, NACE TM0177, SSC Test, Magnetic Particle, HIC Test, Charpy V-Notch Test |
| Packaging | Loose / Bundle / Wooden Pallet / Wooden Box / Plastic Cloth Wraps / Plastic End Caps / Beveled Protector |
Chemical Compositions of ASTM A691 9Cr-1Mo EFW Alloy Steel Pipe
| Element | Symbol | Composition (% Max unless specified) |
|---|---|---|
| Carbon | C | 0.15 |
| Manganese | Mn | 0.30 – 0.60 |
| Phosphorus | P | 0.025 |
| Sulfur | S | 0.025 |
| Silicon | Si | 1.00 |
| Chromium | Cr | 8.00 – 10.00 |
| Molybdenum | Mo | 0.90 – 1.10 |
ASTM A691 9Cr-1Mo EFW Alloy Steel Pipe Mechanical Properties
| Property | Value |
|---|---|
| Tensile Strength | 515 – 690 MPa |
| Yield Strength | 310 MPa min |
| Elongation (50 mm) | 18% min |
| Reduction of Area* | 40% min |
Applications Uses of ASTM A691 9Cr-1Mo EFW Alloy Steel Pipe
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- Thermal Power Plants
- Oil Refineries
- Petrochemical Plants
- Chemical Processing Plants
- Fertilizer Plants
- Steel Manufacturing Plants
- Combined Cycle Power Plants
- Pulp & Paper Mills
Frequently Asked Questions
What is ASTM A691 9Cr-1Mo EFW Alloy Steel Pipe?
ASTM A691 9Cr-1Mo EFW Alloy Steel Pipe is an electric fusion welded alloy steel pipe designed for high-temperature and high-pressure applications.
What does 9Cr-1Mo mean in ASTM A691 pipe?
It refers to an alloy containing approximately 9% chromium and 1% molybdenum for improved heat resistance and strength.
What are the applications of ASTM A691 9Cr-1Mo EFW Alloy Steel Pipe?
These pipes are used in power plants, refineries, petrochemical plants, boilers, and high-temperature process piping.
Is ASTM A691 9Cr-1Mo pipe suitable for high-temperature service?
Yes. It is specifically designed to perform reliably in elevated-temperature and high-pressure environments.
What is the difference between ASTM A691 9Cr-1Mo and ASTM A335 P9 pipe?
ASTM A691 9Cr-1Mo is an electric fusion welded (EFW) pipe, while ASTM A335 P9 is a seamless alloy steel pipe.
Is ASTM A691 9Cr-1Mo pipe seamless or welded?
ASTM A691 9Cr-1Mo is manufactured as an electric fusion welded (EFW) pipe.
