- sales@amanpipesandtubes.co.in
- Hyderabad, India
Home > Carbon Steel > ST 35/ST 35.8 Tubing
Aman Pipes and Tubes, a well-respected manufacturer and supplier located in Hyderabad, India, specializes in providing top-notch ST 35 / ST 35.8 Tubing designed for pressure-bearing and high-temperature systems. These carbon steel tubes meet the DIN 2391 and DIN 17175 standards, making them perfect for precision hydraulic and boiler applications. Known for its impressive mechanical strength and thermal conductivity, ST 35.8 is commonly used in heat exchangers, steam pipelines, and pressure vessels. Aman ensures seamless tubing with outstanding dimensional accuracy, surface finish, and consistent quality—ideal for engineering, mechanical, and industrial setups that require dependable and efficient performance.
ST 35 / ST 35.8 Tubing is primarily crafted from carbon steel, containing about 0.17% carbon, along with small amounts of manganese, phosphorus, and sulfur. These low-carbon steels are known for their excellent weldability and machinability. ST 35 boasts a tensile strength of 470–630 MPa and a yield strength of around 235 MPa, while ST 35.8 offers enhanced strength and heat resistance, making it suitable for boiler-grade applications. Elongation typically falls between 25–35%. The seamless design guarantees uniform pressure handling and integrity under stress, making these tubes perfect for fluid conveyance, thermal systems, and mechanical load-bearing tasks.
| 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 |
