What are DIN 2391 ST 35 Seamless Precision Steel Tubes?
DIN 2391 ST 35 Seamless Precision Steel Tubes are high-precision carbon steel tubes manufactured according to DIN 2391 specifications for applications requiring superior dimensional accuracy, smooth surface finish, and excellent mechanical properties. These tubes are widely used in hydraulic systems, automotive components, engineering machinery, pneumatic cylinders, and precision equipment. Available in NBK, GBK, and annealed conditions, ST35 precision tubes offer excellent weldability, formability, and pressure resistance.
DIN 2391 ST 35 Seamless Precision Steel Tubes – Overview
These are the cold finished carbon steel tubes with close dimensional tolerances and good surface finish, manufactured by utilizing advanced cold drawing technology for use under rigorous conditions of operation requiring accurate dimensions and a superior surface quality.
We offer DIN 2391 ST 35 Seamless Precision Steel Tube as a renowned producer catering to the demand by delivering high-quality products that meet various standard requirements of world-class clients. These tubes are used widely in sectors like hydraulic machinery, auto components, engineering equipment construction, and building machines due to the high precision and reliable performance characteristics of the products manufactured.
We stock and supply varieties of sizes of cold drawn precision tube ST 35, ST35 NBK seamless steel pipe, DIN 17175 ST35.8 Annealed Tube, and ST35 GBK Precision Steel Tube.
What is DIN 2391 ST35 Steel Tube?
The DIN 2391 standards refer to seamless precision steel tubes for use in mechanics and hydraulics. The steel grade ST35 is a low carbon steel and has good machining performance, weldability, and cold formability.
The combination of precision manufacturing and high-quality steel makes ST35 tubes suitable for applications requiring:
- High dimensional accuracy
- Smooth internal and external surfaces
- Consistent mechanical properties
- Reliable pressure-bearing capability
- Easy fabrication and welding
As an experienced DIN 2391 ST35 carbon steel tubing supplier, we ensure every tube undergoes strict quality inspections before dispatch.
Table of Content
- What is DIN 2391 ST35 Steel Tube?
- DIN 2391 ST35 Tube Manufacturing Process
- ST35 NBK Seamless Steel Pipe Properties
- ST35 GBK Precision Steel Tube Features
- DIN 17175 ST35.8 Annealed Tube Applications
- ST 35 NBK Seamless Pipe & DIN 1.0308 Welded Tube Supplier in India
- 1.0308 ST35 Seamless Tube Distributor – Available Specifications
- Advantages of DIN 2391 ST35 Seamless Precision Steel Tubes
- Quality Assurance and Testing
- Why Choose Us for DIN 2391 ST35 Precision Tubes?
- Frequently Asked Questions

DIN 2391 ST35 Tube Manufacturing Process
The superior quality of DIN 2391 ST35 precision tubes comes from a carefully controlled manufacturing process.
Raw Material Selection
Premium-grade carbon steel billets are selected and verified according to DIN standards.
Tube Formation
The billets are pierced and processed into seamless hollow tubes.
Cold Drawing Process
The tubes undergo multiple cold drawing operations to achieve precise dimensions and tighter tolerances.
Heat Treatment
Depending on customer requirements, tubes may be supplied in NBK, GBK, or annealed condition.
Surface Finishing
The tubes are cleaned, straightened, inspected, and finished to ensure smooth surfaces and dimensional consistency.
Quality Testing
Each tube undergoes rigorous mechanical, dimensional, and non-destructive testing procedures.
This manufacturing method produces high-quality cold drawn precision tube ST 35 suitable for demanding industrial applications.