- sales@liampipes.us
- Houston , USA
Home > Carbon Steel > ST 35/ST 35.8 Tubing
Liam Pipes and Tubes is a trusted manufacturer and supplier of ST 35 / ST 35.8 Tubing, proudly based in Houston, USA. They specialize in high-quality carbon steel tubing designed for pressure-bearing and structural applications. The company has built a solid reputation for its precision-engineered products, commitment to international standards, and reliable customer support. ST 35 and ST 35.8 tubes are commonly found in heat exchangers, boilers, and piping systems, particularly in high-temperature and high-pressure settings. Liam Pipes and Tubes also offers customized dimensions, wall thicknesses, and surface finishes to meet a diverse range of industrial needs, all while ensuring prompt delivery and competitive pricing.
ST 35 and ST 35.8 Tubing are low-carbon, seamless carbon steel grades that fall under DIN 2391 and DIN 17175 standards, respectively. ST 35 has about 0.17% carbon and around 0.40% manganese, while ST 35.8 features up to 0.20% carbon and 0.30–0.80% manganese, providing slightly better strength and temperature resistance. These tubes boast a tensile strength between 480–640 MPa and a yield strength of about 255 MPa, depending on the specific grade. They are well-regarded for their machinability, ductility, and pressure resistance, making them suitable for welding and bending without losing structural integrity.
| 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 |
