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Home > Products > Industrial Metal Pipe > ASTM A691 Pipes > ASTM A691 GR 1 CR
ASTM A691 GR 1 CR, alloy steel pipes, electric-fusion-welded pipes, high-pressure pipes, and petrochemical industry pipes, Kwality Steelage.
ASTM A691 GR 1 CR Alloy Steel Pipes are renowned for their durability and superior performance in high-pressure and high-temperature applications. These pipes are fabricated using electric-fusion-welded (EFW) technology from pressure vessel quality plates, ensuring enhanced structural integrity. With sizes ranging from 1/2 inch to 36 inches nominal bore (NB) and wall thickness options spanning SCH 10 to SCH XXS, these pipes cater to a wide array of industrial needs, including power plants, petrochemical refineries, offshore oil drilling, and chemical processing. The pipes can be supplied in various lengths, such as single random, double random, or custom lengths up to 12 meters, meeting the exact specifications of the industry.
The material composition of ASTM A691 GR 1 CR pipes is a balanced blend of 0.80–1.15% Chromium, 0.45–0.60% Molybdenum, and a controlled percentage of Carbon, Silicon, and Manganese, making them highly resistant to corrosion, scaling, and oxidation in extreme environments. These properties are further enhanced through precise manufacturing processes, including annealing, normalizing, and tempering heat treatments. With a minimum tensile strength of 450 MPa and a yield strength of 275 MPa, these pipes offer excellent mechanical properties, ensuring reliability under stress and prolonged operational life.
To ensure dimensional accuracy, ASTM A691 GR 1 CR pipes are manufactured with a strict tolerance of ±1% in outside diameter and +12.5%/-10% for wall thickness. The end finishes, including plain, beveled, or threaded options, make these pipes versatile for diverse industrial applications. Each pipe undergoes rigorous non-destructive testing methods such as hydrostatic testing, ultrasonic examination, and eddy current testing to verify their quality and compliance with global standards. The outer surface is coated with anti-corrosion oil or black painting to enhance protection during storage and transit.
These pipes are not only cost-effective but also offer flexibility in terms of customization. They are available in forms such as round, square, rectangular, and hydraulic configurations to suit specific industrial requirements. The seamless integration of advanced technology and high-grade raw materials makes ASTM A691 GR 1 CR Alloy Steel Pipes a preferred choice for demanding applications in sectors such as fluid and gas transmission, power generation, and offshore engineering.
Kwality Steelage Pvt. Ltd., based in Mumbai, India, is a trusted manufacturer, supplier, and exporter of ASTM A691 GR 1 CR Alloy Steel Pipes. With a commitment to delivering premium-quality products and meeting stringent delivery timelines, we serve industries across the globe. For inquiries or custom solutions, contact us today to experience unparalleled service and product excellence tailored to your needs.
| Specification | Details |
| Size Range | 1/2 inch to 36 inch NB |
| Schedule Thickness Range | SCH 10, SCH 20, SCH 40, SCH 80, SCH 120, SCH 160, XS, XXS, and custom schedules |
| Applications | Power Plants, Petrochemical Industries, Offshore Drilling, Chemical Processing, High-Pressure Fluid Transmission |
| Pipe Type | Electric-Fusion-Welded (EFW) |
| Pipe & Tube Form | Round, Square, Rectangular, Hydraulic Pipes |
| Manufacturing Process | Electric-Fusion Welding with Pressure Vessel-Quality Plate |
| Material Composition | Alloy Steel with 0.80–1.15% Chromium, 0.45–0.60% Molybdenum, and balanced Carbon, Silicon, and Manganese |
| End Type | Plain, Beveled, Threaded |
| Length Options | Single, Double Random, and Custom Lengths (up to 12 meters) |
| End Protection | Plastic Caps |
| Outside Coating | Anti-Corrosion Oil, Black Painting |
| Tolerance Type | Outside Diameter (OD) | Wall Thickness (WT) |
| Size Tolerance | ±1% of specified OD | +12.5% / -10% of specified WT |
| Outside Diameter (mm) | Wall Thickness (mm) | Nominal Size (in.) | Schedule | Weight (Kg/m) |
| 13.72 | 1.65 | 1/4 | SCH 10 | 0.45 |
| 21.34 | 3.91 | 1/2 | SCH 40 | 1.50 |
| 42.16 | 6.55 | 1-1/4 | SCH 80 | 5.25 |
| 88.90 | 10.97 | 3 | SCH 160 | 21.00 |
| 168.28 | 18.26 | 6 | SCH XXS | 65.50 |
Note: Additional sizes and weights are available upon request.
| Grade | Yield Strength (Min) | Tensile Strength (Min) | Elongation (%) |
| 1 CR | 275 MPa | 450 MPa | 20-25 |
| Element | Maximum % Composition |
| Carbon (C) | 0.05-0.17 |
| Manganese (Mn) | 0.40-0.65 |
| Phosphorus (P) | 0.025 |
| Sulfur (S) | 0.025 |
| Silicon (Si) | 0.15-0.40 |
| Chromium (Cr) | 0.80-1.15 |
| Molybdenum (Mo) | 0.45-0.60 |
| Pipe Type | Price Range (USD) |
| ASTM A691 GR 1 CR EFW Pipes | $1,200 – $2,500 |
Prices vary depending on size, schedule, and surface treatment options.
For welding ASTM A691 GR 1 CR pipes, advanced processes ensure optimal joint strength. Post-Weld Heat Treatment (PWHT) is mandatory for sections over 12 mm to relieve residual stresses. Stress-relieving at 1,100–1,200°F (590–650°C) is standard, enhancing pipe performance in extreme environments. Proper preheating ensures robust connections and minimizes the risk of cracking.
| Feature | GR 1 CR | GR 1 1/4 CR |
| Chromium Content | 0.80–1.15% | 1.00–1.50% |
| Yield Strength | 275 MPa | 310 MPa |
| Applications | High-Pressure, Moderate Temperature | High-Pressure, Higher Temperature |
Contact Kwality Steelage Pvt. Ltd. today to source ASTM A691 GR 1 CR Alloy Steel Pipes tailored to your industrial needs. Ensure unmatched quality and performance for your projects!
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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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