• 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

Shipbuilding Seamless Steel Tube Light Weight ST52.4 With Long Service Life

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.
Delivery Condition +C,+LC,+SR,+N,+A Standard DIN2391, DIN2445
Processing Cold Drawn, Cold Rolled Certificate TS16949,DNV,PED,ISO
High Light

precision seamless pipe


seamless round tubes

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Product Description

Round Steel Pipe DIN2391 DIN2445 St52.4 High Precision Seamless Steel Tubes


Chemical Component

C: 0.12-0.20%;
Mn: 1.20-1.60%;
Si: 0.20-0.55%.


Mechanical properties

Tensile strength: 470-660 Mpa;

Yield strength: 275-345 Mpa;

Elongation: 21%;


Main Date

Standard DIN2391,DIN2445
Material St52.4
Outer Diameter Range: 4-120mm
Wall Thickness Range: 0.5-15mm

Delivery Condition 

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.

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


Surface treatment:


As customer's requirements.