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Din 2391 St35 Gbk Seamless Carbon Steel Pipe 6-89mm Outer Diameter 2-20mm Thickness

Place of Origin Jiangsu,China
Certification ISO 9001 ,CE
Minimum Order Quantity 1 PCS
Delivery Time 7~10 working days
Payment Terms L/C, T/T, Western Union
Supply Ability 5000 Ton/Tons per Month

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Product Details
Product Name Carbon Steel Pipe Standard DIN 2391
Grade St35 Size OD (4-190mm) X WT (0.5-15mm)
Type Seamless Pipe(SMLS) Pipe End Plain End,Beveled End,Treaded
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gbk seamless carbon steel pipe


2mm thickness seamless carbon steel pipe


20mm thickness cs seamless pipe

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Product Description
DIN 2391 St35 Carbon Steel Seamless Pipes

ST 35 Steel Grade Seamless Pipe is primarily used in those applications where parameters such as accuracy to size and a small wall thickness along with a particular surface condition as well as specific mechanical properties are required. An important feature of the DIN 2391 ST35 specified pipe is that they have been manufactured using precise dimensions. If required, we can deliver these seamless ST 35 Steel Pipes in a cold finished condition. Additionally, we can also supply the Carbon Steel DIN 2448 ST 35 Hydrualic Pipe in a polished, or Annealed & Pickled condition or Bright & Annealed condition, depending on the requirements of our clients. These Carbon Steel DIN 2391 ST35 Round Pipe could be manufactured from either electric steel or from basic oxygen steel. Although the melting as well as casting processes conducted on the raw material used to make the DIN 2391 ST 35 Seamless Pipe is entirely on the discretion of the manufacturers. The steel for DIN 2391 ST35 is usually cast as killed steel.
Din 2391 St35 Gbk Seamless Carbon Steel Pipe 6-89mm Outer Diameter 2-20mm Thickness 0



Steel grade EN number
St35 1.0308
St37.4 1.0255
St45 1.0408
St52 1.058
St52.4 1.0581
St30Si 1.0211
St30Al 1.0212



Steel Grade Chemical Composition
Symbol Material Number










ST35 1.0308 0.17 0.35 ≥0.40 0.025 0.025
ST45 1.0408 0.21 0.35 ≥0.40 0.025 0.025
ST52 1.0580 0.22 0.55 ≤1.60 0.025 0.025




Cold drawn


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



OD Tolerance 4-30mm 31-40mm 41-50mm 51-60mm 61-70mm 71-80mm 81-90mm 91-100mm
±0.08mm ±0.15mm ±0.20mm ±0.25mm ±0.30mm ±0.30mm ±0.40mm ±0.45mm
WT Tolerance ±10%



1. NBK(+N)
after cold forming, eventually above phase transition point, in a protective atmosphere of annealing oxidation medium
2. GBK(+A)
after cold forming, annealing in non oxidizing medium protective gas
3. BK(+C)
the final heat treatment after cold forming, therefore small steel pipe plastically, the plastically degree does not guarantee
4. BKW(+LC)
after final heat treatment, a tiny cold drawing deformation, continue again when machining steel pipe allowed inside certain limits cold deformation(bending, flaring)
5. BKS(+SR)
have a stress relief after cold forming, heat treatment, steel pipe can be carried out within a certain limit in the appropriate processing again



The 17175 St35.8 Seamless Steel Tubes Will be delivered through a suitable heat treatment. heat treatment includes:
- Normalizing
- Annealing
- Tempering; from the quenching temperature, it is not cold, but then tempered
- Adjust the mass by the isothermal transformation method.


Original material test
A thin sheet should be taken at the top end of each round or square bar ingot for a pickling test to determine if the top end is adequately cut. Ultrasonic testing can also be performed on the shrinkage hole as selected by the supplier.

- Chemical composition verification test
- hydrostatictest
- Tensile test
- Notched impact test
- Yield strength test
- Ring test
- Nondestructive testing