Home > Carbon Steel > ST 35/ST 35.8 Tubing
Bereket Pipes, a leading manufacturer and supplier based in Addis Ababa, Ethiopia, is dedicated to providing high-quality carbon steel tubing solutions for diverse industrial applications. Among its reliable offerings, the ST 35 / ST 35.8 Tubing stands out for its excellent strength, durability, and performance under pressure and temperature variations. Manufactured with precision and in compliance with international standards, these tubes are ideal for boiler, heat exchanger, and mechanical applications. Bereket Pipes’ commitment to quality craftsmanship, advanced production methods, and customer satisfaction ensures dependable, long-lasting tubing solutions for power, petrochemical, and engineering industries worldwide.
Bereket Pipes’ ST 35 / ST 35.8 Tubing is made from high-grade carbon steel containing carbon (≤0.17–0.20%), manganese (0.40–0.80%), phosphorus (≤0.025%), and sulfur (≤0.020%). This composition offers a balance of strength, ductility, and toughness. The tubes exhibit high tensile strength (approximately 360–480 MPa), good yield strength, and excellent machinability. ST 35.8, being a heat-treated variant, provides enhanced resistance to high pressure and temperature. These mechanical properties make the tubing suitable for seamless performance in mechanical systems, pressure vessels, and heat transfer applications.
| Standard | Grade | C | Si | Mn | P max | S max |
| DIN2391 | St35 | ≤0.17 | ≤0.35 | ≥0.4 | 0.025 | 0.025 |
| Cold drawn(Mandatory) | Cold drawn(Soft) | Cold Drawn and Stress Release | Anneal | Normalizing | ||||||||
| BK1) | BKW1) | (BKS) | (GBK)1) | (NBK)1) | ||||||||
| Grade | Tensile | Elongation | Tensile | Elongation | Tensile | Yield point | Elongation | Tensile | Elongation | Tensile | Yield point | Elongation |
| N/mm2 | % | N/mm2 | % | N/mm2 | N/mm2 | % | N/mm2 | % | N/mm2 | N/mm2 | % | |
| St35 | 480 | 6 | 420 | 10 | 420 | 315 | 14 | 315 | 35 | 340~470 | 235 | 25 |