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Dense Metal Seamless Steel Pipe 120mm Large Diameter Range EN10305-1 Standard

Place of Origin China
Brand Name Hongbao
Certification TS16949, ISO9001, OHSAS18001 etc.
Model Number HBPST-1
Minimum Order Quantity 1 ton
Price Negotiable
Packaging Details Seaworthy Wooden box, customized Packing
Delivery Time 30 Days
Supply Ability 60000 MT per Year

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Product Details
Shape Round Application Automotive Part, Hydraulic System, High-precsion Machining. Etc.
Payment T/T; L/C Sample Free Sample
Length 12000mm Max Processing Cold Drawn, Cold Rolled
High Light

seamless steel tube


seamless round tubes

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Product Description

Precision Seamless Steel Tubes Delivery Condition BKS Standard EN10305-1 Steel Round Pipe



Precision seamless steel tube is a high precision steel tube after cold rolling or cold drawing


Main Date

Standard EN10305-1; DIN2391; DIN2445
Material E235, E355, St37.4, St52.4
Outer Diameter Range: 4-120mm
Wall Thickness Range: 0.5-15mm

Delivery Condition 

BKS(+SR): After the final cold drawing process there is a stress relieve heat treatment in a controlled atmosphere.


Other Delivery Conditions 

NBK(+N): After the final cold drawing operation the tubes are normalized in a controlled atmosphere.

GBK(+A): After the final cold drawing process the tubes are annealed in a controlled atmosphere.

BK(+C): No heat treatment after the final cold drawig process.

BKW(+LC): After the final heat treatment there is a suitable drawing pass.



1. Smaller outer diameters;

2. High precision can be done in small batch production;

3. Cold drawing finished products with high precision and good surface quality.

4. The transverse area of the steel tube is more complicated;

5. Steel pipe performance is superior, metal is more dense.


Size Tolerance Table

OD Range EN10305(DIN2391)
4-30mm ±0.08mm
31-40mm ±0.15mm
41-50mm ±0.2mm
51-60mm ±0.25mm
61-70mm ±0.3mm
71-160mm ±0.30mm
WT Range ±0.10mm


Dense Metal Seamless Steel Pipe 120mm Large Diameter Range EN10305-1 Standard 0