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Home > Products > Industrial Metal Pipe > ASTM A691 Pipes > ASTM A691 GR 3 CR
ASTM A691 GR 3 CR, Alloy Steel Pipes, High-Temperature Steel Pipes, Corrosion-Resistant Alloy Pipes, Pressure Vessel Grade Pipes, EFW Steel Pipes, ASTM A691 Pipes Manufacturer, Industrial Alloy Pipes, Kwality Steelage Pipes
ASTM A691 GR 3 CR is a premium-grade alloy steel pipe engineered for high-pressure and high-temperature applications. Manufactured by Kwality Steelage Pvt. Ltd., a renowned supplier and exporter based in Mumbai, India, these pipes are fabricated using pressure vessel-grade plates and undergo electric fusion welding (EFW) for superior durability and mechanical performance. Designed to cater to the stringent demands of industries such as petrochemical plants, power generation, and offshore oil drilling, ASTM A691 GR 3 CR pipes offer exceptional corrosion resistance and thermal stability.
These pipes are available in nominal bore (NB) sizes ranging from 1/2 inch to 36 inches, with wall thickness options that comply with multiple schedules, including SCH 20, SCH 40, SCH 80, SCH 120, SCH 160, and XXS. The alloy composition includes 3% chromium and 1% molybdenum, which provide outstanding resistance to oxidation, scaling, and thermal stress. Additional elements such as carbon, manganese, phosphorus, sulfur, and silicon contribute to excellent weldability, toughness, and mechanical strength, making them ideal for critical applications in refineries, chemical processing, and shipbuilding.
ASTM A691 GR 3 CR pipes exhibit robust mechanical properties, with a minimum yield strength of 310 MPa and tensile strength ranging from 515 MPa to 690 MPa. Dimensional tolerances are strictly maintained, with an outside diameter variation of ±1% and a wall thickness tolerance of +12.5%/-10%. These pipes are supplied in various end types, including plain, beveled, and threaded, and are available with surface finishes like black painting, galvanized coating, and anti-corrosion treatment to meet diverse project requirements. Custom lengths up to 12 meters are offered for flexibility in installation.
The manufacturing process includes advanced heat treatments such as normalizing, quenching, and tempering, ensuring optimal mechanical stability and durability. Post-weld heat treatment (PWHT) is recommended for pipes with thicknesses exceeding 12 mm to reduce residual stresses and enhance structural integrity. Comprehensive testing methods, including ultrasonic and hydrostatic examinations, guarantee the quality and reliability of these pipes under extreme operating conditions.
Kwality Steelage Pvt. Ltd. ensures that ASTM A691 GR 3 CR pipes meet international standards and certifications. Meticulous packaging in wooden crates or bundles ensures safe delivery to domestic and international destinations, including the Middle East, Europe, and Southeast Asia. Contact us today to explore our range of ASTM A691 GR 3 CR Alloy Steel Pipes and ensure 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, All Schedules |
| Applications | Refineries, Power Plants, Chemical Processing, Offshore Oil |
| Pipe Type | Electric Fusion Welded (EFW) |
| Pipe Form | Round, Rectangular, Square, Hydraulic Pipes |
| Manufacturing Process | Heat-Treated (Normalized, Quenched, Tempered) |
| Material Composition | 3% Chromium, 1% Molybdenum, Carbon, Manganese, Silicon, 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 (%) |
| 3 CR | 310 MPa | 515-690 MPa | 18-22% |
| Element | Maximum % Composition |
| Carbon (C) | 0.05-0.15% |
| Manganese (Mn) | 0.30-0.65% |
| Phosphorus (P) | 0.025% |
| Sulfur (S) | 0.025% |
| Silicon (Si) | 0.15-0.40% |
| Chromium (Cr) | 2.00-3.00% |
| Molybdenum (Mo) | 0.90-1.10% |
| Pipe Type | Price Range (USD) |
| ASTM A691 GR 3 CR Alloy Steel Pipes | $1,000 – $2,300 |
ASTM A691 GR 3 CR pipes are engineered with precise heat treatments to enhance their mechanical strength and longevity. These pipes undergo stress relief at 1100-1250°F (590-675°C) and normalization up to 1700°F (925°C). Quenching and tempering may be applied depending on specific application requirements. Post-Weld Heat Treatment (PWHT) is recommended for wall thicknesses above 12 mm to minimize residual stresses and ensure structural stability.
| Feature | GR 3 CR | GR 5 CR |
| Chromium Content | 2.00-3.00% | 4.00-6.00% |
| Molybdenum Content | 0.90-1.10% | 0.45-0.65% |
| Applications | High-Temperature, Medium Pressure | Extreme Temperature, High Pressure |
Partner with Kwality Steelage Pvt. Ltd. for premium ASTM A691 GR 3 CR Alloy Steel Pipes. Designed for reliability and durability in demanding industrial applications. Contact us now for a customized solution!
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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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