- sales@rithavpipesandtubes.co.in
- Delhi, India
Home > Carbon Steel > ST 35/ST 35.8 Tubing
Rithav Pipes and Tubes, located in Delhi, India, has built a solid reputation as a manufacturer and supplier of ST 35 / ST 35.8 Tubing, designed for high-pressure and high-temperature environments. These carbon steel tubes, crafted to meet DIN and EN standards, are celebrated for their remarkable strength, weldability, and durability. The ST 35 and ST 35.8 grades are seamless low-carbon steel options that excel in applications like boiler tubes, heat exchangers, and mechanical systems. At Rithav, we provide precision-engineered ST 35 / ST 35.8 tubes featuring consistent wall thickness, smooth internal surfaces, and adherence to rigorous quality standards, catering to clients in the power generation, petrochemical, and industrial sectors.
ST 35 / ST 35.8 Tubes are constructed from low-carbon steel, with a chemical makeup that includes approximately carbon (≤ 0.17%), manganese (≤ 0.40–0.70%), phosphorus (≤ 0.035%), and sulfur (≤ 0.035%). The ST 35.8 variant is slightly modified to offer better temperature resistance and pressure tolerance. In terms of mechanical properties, these tubes boast a tensile strength of 480–640 MPa, a yield strength of at least 235 MPa, and an elongation of 25% or more. They provide excellent toughness, formability, and weldability, and can be utilized in annealed, normalized, or stress-relieved conditions based on the specific application.
| 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 |
