DIN 2391 ST35 pipe is a common low carbon steel containing chemical components such as carbon, silicon, manganese, phosphorus, and sulfur. The carbon content is between 0.17-0.23%, the silicon content is between 0.15-0.35%, and the manganese content is between 0.17-0.23%. Between 0.40-0.80%, the content of both phosphorus and sulfur does not exceed 0.035%.
ST35 precision pipe is a high-precision, high-brightness seamless steel pipe produced through cold drawing or cold rolling processes. The inner and outer diameter dimensions can be accurate to within 0.2mm. When bending and torsional strength are the same, the weight is lighter. ST35 high-gloss cold-rolled precision pipe is used to manufacture mechanical structures, hydraulic equipment, automobile parts, and steel sleeves.
Chemical composition of DIN 2391 St35 Seamless Precision Steel Tubes
| Standard | Grade | C | Mn | Si | S maximum | P maximum |
| DIN2391 | St35 | ≤0.17 | ≥0.4 | ≤0.35 | 0.025 | 0.025 |
DIN 2391 ST35 Pipes Mechanical Behaviour
| Cold drawn(Mandatory) | Cold drawn(Soft) | Cold Drawn and Stress Release | Normalizing | Anneal | ||||||||
| BK1) | BKW1) | (BKS) | (NBK)1) | (GBK)1) | ||||||||
| Grade | Tensile | Elongation | Tensile | Elongation | Tensile | Yield point | Elongation | Tensile | Yield point | Elongation | Elongation | Tensile |
| N/mm2 | % | N/mm2 | % | N/mm2 | N/mm2 | % | N/mm2 | N/mm2 | % | % | N/mm2 | |
| St35 | 480 | 6 | 420 | 10 | 420 | 315 | 35 | 340~470 | 235 | 25 | 14 | 315 |
Standard Quality Specification Of DIN 2391 St35 Carbon Steel Seamless Pipes
| Standard | DIN 2391 |
| Grade | ST35 |
| Size | OD (4-190mm) x WT (0.5-15mm) |
| Outer Dimensions | 4.0mm – 60.0mm |
| Wall Thickness | 0.5mm – 8 mm |
| Length | max 6000mm |
GNEE group is not only committed to providing high-quality steel products, but also actively establishing close cooperative relationships with many companies. These include Baowu Group, Anyang Iron and Steel Group, Wuhan Iron and Steel, Shandong Iron and Steel, Jiugang Group, Shougang Group, Valin Iron and Steel and many other companies. These companies have excellent technical strength and rich experience in their respective fields, providing us with extensive support and help. By working together with these partners, we are able to drive innovation and development in the steel industry.
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