Filiz Steel stands out as a premier manufacturer and reliable supplier located in Istanbul, Turkey, with a focus on high-quality ST 35 and ST 35.8 tubing. The company prides itself on its dedication to precision engineering, top-notch materials, and adherence to international quality standards. Filiz Steel caters to a wide array of industries, including energy, automotive, construction, and machinery. They provide both seamless and welded tubing solutions customized to meet client needs, ensuring dependable performance even in the most challenging applications. With a strong emphasis on innovation, customer satisfaction, and global distribution, Filiz Steel has earned a solid reputation as a trustworthy partner in the steel tubing market throughout Europe, the Middle East, and beyond.
ST 35 and ST 35.8 tubing are low-carbon steel grades that are frequently utilized for seamless pressure pipes. These materials typically contain up to 0.17% carbon, 0.35–0.70% manganese, along with trace amounts of phosphorus and sulfur. They are known for their excellent weldability and machinability. In terms of mechanical properties, they boast a tensile strength range of 480–640 MPa and a yield strength of around 255 MPa. With a minimum elongation of 25%, the tubing showcases impressive ductility and toughness. ST 35.8 is often normalized to boost its mechanical strength, making it suitable for high-temperature and pressure applications.
Standard : ASTM A694 / ASME SA 694
Dimensions : ASME/ANSI 16.11, MSS SP-79, 83, 95, 97, BS 3799
Size : 1/8″ NB to 4″ NB
Type : Socketweld Fittings, Screwed-Threaded Fittings (NPT or PT Type)
Rating Pressure : Threaded End – 2000 /3000/ 6000 LBS. Socket-weld End – 3000 / 6000/ 9000 LBS.
| Grade | C | Si | Mn | P | S | Mo | Ni | Cr | Cu | V | Nb |
| F60 | 0.17-0.23 | 0.15-0.40 | 1.20-1.50 | ≤ 0.020 | ≤ 0.012 | 0.45-0.60 | 0.40-1.00 | ≤ 0.25 | ≤ 0.25 | ≤ 0.050 | – |
| Grade | Yield Strength, Min (KSI ) | Tensile Strength, Min (KSI) |
| A694 | 60 | 75 |
We provide products that come with both mill test certificates and third-party test certificates, ensuring the highest standards of quality and compliance.
| ASME B16.11 | Factory-Made Wrought Socketweld Fittings | CS F60 Forged Screwed Elbows, Street Elbow, Carbon Steel F60 Screwed Unequal Tee, Steel Straight Tee, Carbon Steel F60 Reducing Coupling, Carbon Steel F60 Hex Plug, Forged Straight Tees, Socket Weld Pipe Cap, Forged Pipe Cap, Equal Crossess, CS F60 Threaded Bushing, Carbon Steel F60 Screwed Caps, Swedge Nipples |
| MSS-SP-79 | standard Practice covers ratings, tolerances, finish, dimensions, marking and material requirements for socket-welding | Carbon Steel F60 Barrel Nipples, CS F60 Forged Threaded Boss, Carbon Steel F60 Forged Hex Head Bull Plugs |
| MSS-SP-83 | Forged and Fabricated Socket-Welding Fittings for Low Pressure, Corrosion Resistant Applications | Carbon Steel F60 High Quality Socket weld 90° Elbow, Straight and Reducing-on-the-Tees, Forged 45° Short Radius Elbow, CS F60 caps, 3000LB Socket Weld Cross |
| MSS-SP-95 | Integrally Reinforced Forged Fittings – Socket Welding, Threaded, and Buttwelding Ends | CS F60 Socket weld Long Radius 90 Degree Elbows, Reducing Nipple, Socketweld Bushing, Threaded Plug, End Pipe caps, Carbon Steel F60 Coupling |
The versatility of ST 35 and ST 35.8 tubing makes them popular across various industries due to their strength, thermal resistance, and ability to handle pressure. They are commonly found in boiler tubes, heat exchangers, superheaters, and pipeline systems within power plants and refineries. In the automotive industry, these tubes are essential for hydraulic systems and engine components. In construction and machinery manufacturing, ST 35 tubing is preferred for structural and mechanical applications where reliability and durability are crucial. Its compatibility with welding and forming processes makes it perfect for custom fabrication, while its corrosion resistance under pressure ensures it’s suitable for transporting fluids and gases.
Filiz 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 Istanbul, Turkey.
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