• Jiangsu Hongbao Group Co., Ltd.
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  • Jiangsu Hongbao Group Co., Ltd.
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Contact Person : Angela
Phone Number : 86-512-58715276
Whatsapp : +8615895686919

Machinery Mild Steel Hollow Bar Big Diameter Thick Wall Thickness DIN2391

Place of Origin Jiangsu, China
Brand Name Hongbao
Certification TS16949,DNV,PED,ISO,TUV,LR
Model Number HBHST-1
Minimum Order Quantity 1 ton
Price Negotiable
Packaging Details Original packaging according to the customers Export standard package in bundled or as required.
Delivery Time within 50 days
Supply Ability 30000MT per year

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Product Details
Certificate TS16949,DNV,PED,ISO,TUV,LR OD 6-120mm
Thickness 0.5-15mm Type Welded Or Seamless
Processing Cold Drawn, Cold Rolled Shape Round
High Light

hollow steel bar


hollow steel pipe

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Product Description

DIN2391 Cold Drawn Precision Hollow Steel Tube Big Diameter Welded Steel Pipe



Steel Grade/Steel Material:

E155 E195 E235 E275 E355


Delivery Condition:

1. BK Cold finished(hard)

2. BKW Cold finished(soft)

3. BKS Cold finished and stress-relieved

4. GBK Annealed

5. NBK Normalized



Good concentricity

Good OD and ID tolerance

High precision

Stable quality

Smooth roughness


Steel Tube Production Process:

Raw material → Incoming inspection → Cutting → Heating → Piercing → Hammering →Pickling → Cold-drawing → Heat treatment → Physical chemistry test → Straightening → Ends cutting → Final inspection → Bundling →Storage


Heat treatment method

+Cc, +LCc, +SR, +Ad, +N

Note: Special steel grade is also available, according to customer request.
Please specify the steel grade and heat treatment mothod when sending the enquiry