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Home > Products > Industrial Metal Pipe > ASTM A691 Pipes > ASTM A691 GR 9 CR
GR 9 CR, Alloy Steel Pipes, High-Temperature Applications, Corrosion-Resistant Pipes, Pressure Vessel-Grade Pipes, EFW Steel Pipes
Kwality Steelage Pvt. Ltd., a globally recognized manufacturer, supplier, and exporter based in Mumbai, India, specializes in ASTM A691 GR 9 CR Alloy Steel Pipes. These pipes are meticulously designed to meet the rigorous demands of high-pressure and high-temperature environments, making them an ideal choice for industries like petrochemicals, power generation, oil refineries, and offshore applications. Manufactured using pressure vessel-grade plates and the Electric Fusion Welding (EFW) process, these pipes offer unparalleled mechanical strength, durability, and corrosion resistance.
ASTM A691 GR 9 CR pipes are available in sizes ranging from 1/2 inch to 36 inches nominal bore (NB) with wall thicknesses reaching up to 75 mm. These pipes are offered in a variety of schedules, including SCH 40, SCH 80, SCH 120, and SCH XXS, to accommodate diverse operational requirements. With a tensile strength of 585–760 MPa and a minimum yield strength of 415 MPa, these pipes deliver exceptional performance under extreme conditions.
The chemical composition of ASTM A691 GR 9 CR pipes includes 9% chromium and 1% molybdenum, which significantly enhance their resistance to oxidation, creep, and high thermal stress. Complementary elements like carbon, manganese, silicon, and phosphorus ensure excellent weldability and toughness, making these pipes highly reliable for critical industrial applications. These properties make them indispensable for power plants, chemical processing facilities, and structural frameworks exposed to harsh conditions.
Dimensional precision is maintained with tolerances of ±1% for the outside diameter and +12.5%/-10% for wall thickness, ensuring compatibility with global standards. These pipes are available with various end options, including plain, beveled, and threaded, and come with anti-corrosion coatings, black painting, or galvanization. Custom lengths of up to 12 meters are also available to meet specific project requirements.
Kwality Steelage Pvt. Ltd. ensures stringent quality assurance through advanced testing methods like ultrasonic, hydrostatic, and radiographic inspections. Backed by global certifications, these pipes are meticulously packed in wooden crates or bundles to prevent damage during transportation. With a proven track record of delivering to markets in the Middle East, Europe, and Asia, Kwality Steelage Pvt. Ltd. guarantees reliable products and unparalleled service. Contact us today to explore our range of ASTM A691 GR 9 CR Alloy Steel Pipes and enhance the success of your industrial projects.
| Specification | Details |
| Size Range | 1/2 to 36 inch NB |
| Wall Thickness Range | SCH 20, SCH 40, SCH 80, SCH 120, SCH 160, XXS |
| Applications | Oil Refineries, Petrochemicals, Power Plants, Offshore Projects |
| Pipe Type | Electric Fusion Welded (EFW) |
| Pipe Form | Round, Square, Rectangular, Hydraulic Pipes |
| Manufacturing Process | Heat-Treated (Normalized, Quenched, Tempered), EFW with Pressure Vessel Grade Plates |
| Material Composition | Alloy Steel with 9% Chromium, 1% Molybdenum, Carbon, Manganese, Silicon, and Sulfur |
| End Type | Plain, Beveled, Threaded |
| Length Options | Single Random, Double Random, Custom Lengths (up to 12 meters) |
| Surface Coating | Anti-Corrosion Coating, Black Painting, Galvanized |
| Tolerance Type | Outside Diameter (OD) | Wall Thickness (WT) |
| Size Tolerance | ±1% of specified OD | +12.5% / -10% of specified WT |
| Grade | Yield Strength (Min) | Tensile Strength (Min) | Elongation (%) |
| 9 CR | 415 MPa | 585–760 MPa | 18% |
| Element | Maximum % Composition |
| Carbon (C) | 0.05-0.15% |
| Manganese (Mn) | 0.30-0.60% |
| Phosphorus (P) | 0.025% |
| Sulfur (S) | 0.025% |
| Silicon (Si) | 0.50% |
| Chromium (Cr) | 8.00-10.00% |
| Molybdenum (Mo) | 0.90-1.10% |
| Pipe Type | Price Range (USD) |
| ASTM A691 GR 9 CR Alloy Steel Pipes | $900 – $2,000 |
ASTM A691 GR 9 CR pipes require precise welding and heat treatment to ensure durability and optimal performance. These pipes undergo stress-relieving at 1100-1250°F (590-675°C) and can be normalized at up to 1700°F (925°C). Post-weld heat treatment (PWHT) is recommended for thicknesses exceeding 12 mm to minimize residual stresses and enhance weld strength.
| Feature | GR 9 CR | GR 91 |
| Chromium Content | 8.00-10.00% | 8.00-9.50% |
| Molybdenum Content | 0.90-1.10% | 0.85-1.05% |
| Applications | High-Temperature, High Pressure | Extreme-Temperature, Creep Resistance |
Partner with Kwality Steelage Pvt. Ltd. for high-quality ASTM A691 GR 9 CR Alloy Steel Pipes. Built for durability and efficiency, our pipes meet the toughest industrial demands. Contact us today for customized solutions and global delivery!
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We Kwality Steelage Pvt. Ltd. are professionally organized firm engaged in exporting and supplying Stainless Steel, Carbon Steel, Alloy Steel, Nickel Alloys, Duplex, Super duplex and other Ferrous & Non-Ferrous Metal products such as Pipes, tubes, Pipe, Tubes, Pipe Fittings, Piping Spools, LR Bends, Sheets, Plates, Rods, Flanges, Fasteners, Gaskets.
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