Marzouk Steel, based in Tunis, Tunisia, is a trusted manufacturer and supplier of high-quality steel products engineered for demanding service conditions. One of its specialized offerings is Carbon Steel A333 Gr 7 Tubing, designed specifically for low-temperature and cryogenic applications. Manufactured in accordance with ASTM A333 standards, this tubing delivers excellent toughness, reliability, and safety at sub-zero temperatures. Marzouk Steel ensures strict quality control and precise manufacturing, supplying A333 Gr 7 tubing that meets international standards and performs consistently in critical industrial environments.
Carbon Steel A333 Gr 7 Tubing is produced from high-quality carbon steel with carefully controlled chemical composition, including carbon, manganese, phosphorus, sulfur, and alloying elements that enhance low-temperature toughness. This grade offers good tensile and yield strength while maintaining excellent impact resistance at low temperatures. The seamless or welded tubing construction ensures uniform wall thickness, high structural integrity, and dependable performance under thermal stress and pressure variations.
| Element | A/SA 333 Gr 7 |
| C | 0.30 max |
| Mn | 0.40-1.06 |
| P | 0.025 max |
| S | 0.025 max |
| Element | A/SA 334 |
| Tensile Strength, (MPa) | 380 min |
| Yield Strength, (MPa) | 205 min |
| Elongation min. % | 35 |
| Hardness, HB | 163 max |
We provide products that come with both mill test certificates and third-party test certificates, ensuring the highest standards of quality and compliance.
Marzouk Steel is a leading manufacturer and supplier of Carbon Steel A333 GR 7 Tubing in Tunis, Tunisia. We provide high-quality steel materials and a comprehensive range of products, including Alloy Steel, Carbon Steel, Mild Steel, and Galvanized Steel. Our extensive inventory includes Tubes, Pipes, Flanges, Pipe Fittings, Forged Fittings, Sheets, and Plates. With a commitment to fast delivery and exceptional customer service, we ensure that all our products are made from the finest raw materials, offering superior strength, durability, and performance for demanding industrial applications. Contact us today for your Carbon Steel A333 GR 7 Tubing requirements!
| Outside | Nominal | Wall | Inside | Weight |
| Diameter | Pipe Diameter | Thickness | Diameter | Lbs |
| Inches | Inches | Inches | Inches | Per Foot |
| 1.660 | 1-1/4 | .140 | 1.380 | 2.273 |
| 1.315 | 1 | .133 | 1.049 | 1.679 |
| 1.900 | 1-1/2 | .145 | 1.610 | 2.718 |
| 2.875 | 2-1/2 | .203 | 2.469 | 5.793 |
| 2.375 | 2 | .154 | 2.067 | 3.653 |
| 6.625 | 6 | .28 | 6.056 | 18.97 |
| 3.50 | 3 | .216 | 3.068 | 7.576 |
| 4.50 | 4 | .237 | 4.026 | 10.79 |
| 4 | 3-1/2 | .226 | 3.548 | 9.109 |
| 5.563 | 5 | .258 | 5.047 | 14.62 |
| 8.625 | 8 | .322 | 7.981 | 28.55 |
Carbon Steel A333 Gr 7 Tubing is widely used in low-temperature service applications such as cryogenic piping systems, LNG plants, gas processing facilities, and cold-climate pipelines. It is suitable for transporting gases, liquids, and hydrocarbons in sub-zero environments where toughness and safety are critical. The tubing is also used in petrochemical plants, refineries, and industrial refrigeration systems. Engineers rely on A333 Gr 7 tubing for its reliable performance, resistance to brittle fracture, and long service life in extreme temperature conditions.
Marzouk Steel is a leading manufacturer, supplier and exporter of high-quality Carbon Steel, Alloy Steel, Mild Steel and Galvanized Steel products. Our extensive product range includes Pipes, Tubes, Flanges, Pipe Fittings, Forged Fittings, Sheets and Plates, catering to various industries in Tunis, Tunisia.
Copyright 2025 Marzouk Steel. All rights reserved
