NEW-ERA STEEL TUBE TECHNOLOGY CO.,LTD
| Packaging Details | Bundles package, wooden boxes |
| Delivery Time | 45 days |
| Payment Terms | T/T |
| Supply Ability | 3000 tons per month |
| Standard | ASTM, DIN, EN, JIS |
| Certificate | ISO9001 |
| Process | Cold Drawn |
| Length | Maximal 11.8M |
| Surface Treatment | Bright Annealing, Clean, Black |
| Shape | Round |
| Wall Thickness | 1-30mm |
| HS code | 7304319000 |
| Brand Name | Pipeway steel |
| Model Number | Cold drawn steel tube |
| Place of Origin | China |
| Certification | ISO9001 |
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Product Specification
| Packaging Details | Bundles package, wooden boxes | Delivery Time | 45 days |
| Payment Terms | T/T | Supply Ability | 3000 tons per month |
| Standard | ASTM, DIN, EN, JIS | Certificate | ISO9001 |
| Process | Cold Drawn | Length | Maximal 11.8M |
| Surface Treatment | Bright Annealing, Clean, Black | Shape | Round |
| Wall Thickness | 1-30mm | HS code | 7304319000 |
| Brand Name | Pipeway steel | Model Number | Cold drawn steel tube |
| Place of Origin | China | Certification | ISO9001 |
| High Light | St52 seamless steel tube ，DIN2391 precision tubing ，cold drawn seamless pipe | ||
DIN 2391 St52 BK refers to a high-quality, seamless, cold-drawn precision steel tube made from non-alloy quality steel grade St52 and delivered in the cold-processed (cold-worked) condition
This product is engineered for mechanical and automotive applications where exceptional dimensional accuracy, a superior surface finish, and enhanced mechanical properties are critical. The cold drawing process ensures these tubes outperform standard hot-finished tubes in precision and strength.
Superior Dimensional Accuracy: Manufactured to extremely tight tolerances on outside diameter (OD) and wall thickness (WT).
Excellent Surface Finish: A smooth, scale-free surface ideal for functional components, often requiring no further finishing.
Enhanced Mechanical Properties: The cold drawing process significantly increases yield and tensile strength, providing excellent structural integrity.
High Consistency: Guaranteed chemical and mechanical properties ensure reliability and predictability in manufacturing and performance.
Ready for Machining: The excellent surface and consistent properties make it suitable for further machining and processing.
| Element | Carbon (C) | Manganese (Mn) | Phosphorus (P) | Sulfur (S) | Silicon (Si) * |
|---|---|---|---|---|---|
| Content | ≤ 0.22 % | 1.00 - 1.60 % | ≤ 0.045 % | ≤ 0.045 % | Optional / Specified |
*Note: Silicon content is typically not a major specified element for St52 grade in this standard but can be present in small amounts. The composition is based on DIN 2391-1 and related material standards.
The "BK" (cold-processed) condition is the most common delivery state. The cold working (drawing) hardens the material, resulting in significantly higher strength values compared to the normalized state.
The guaranteed mechanical properties for DIN 2391 St52 BK are:
| Property | Yield Strength (Rₑ or Rp0.2) | Tensile Strength (Rₘ) | Elongation at Break (A) |
|---|---|---|---|
| Value | ≥ 420 MPa | 580 - 740 MPa | ≥ 6 % |
These values are minimum guarantees for the cold-drawn condition as per the standard.
Comparison Note: If the same tube were supplied in the normalized condition ("+N"), its yield strength would be lower (≥ 355 MPa), but its elongation would be much higher (≥ 22%). The "BK" condition is chosen for its higher strength.
DIN 2391 St52 BK tubes are ideal for high-stress structural parts and precision components, such as:
Hydraulic and Pneumatic Cylinder Tubes: Where precise dimensions and pressure resistance are vital.
Automobile Parts: Shock absorber cylinders, steering columns, and other chassis components.
Precision Machinery: Linear motion shafts, guide sleeves, and bearing housings.
General Mechanical Engineering: For all types of welded and machined constructions requiring high strength.
DIN 2391 St52 BK represents a top-tier seamless cold-drawn tube that combines the strength of St52 steel with the precision of the cold drawing process. It is the material of choice for engineers and designers who require a reliable, high-performance component that offers excellent machinability, dimensional stability, and superior mechanical properties straight from the mill.
Company Details
Business Type:
Manufacturer
Year Established:
1988
Total Annual:
100000000-15000000
Employee Number:
150~200
Ecer Certification：
Verified Supplier
Zhejiang New Era Steel Tube Technology Co., Ltd is one of the best seamless steel tube products manufacturer and exporter in china. Our main products include cold drawn and cold rolled seamless steel tubes .We can manufacture non-standard and special application tubes, also according to the int... Zhejiang New Era Steel Tube Technology Co., Ltd is one of the best seamless steel tube products manufacturer and exporter in china. Our main products include cold drawn and cold rolled seamless steel tubes .We can manufacture non-standard and special application tubes, also according to the int...
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