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DIN2391 BKW BKS GBK NBK Seamless Precision Cold Drawn Steel Tubes

Categories Seamless Steel Tube
Brand Name: TORICH
Model Number: DIN 2391
Certification: ISO 9001 ISO 14001 TS 16949 EN 10204.3.1 CCS PED
Place of Origin: China
MOQ: 5 Ton
Price: negotiable
Supply Ability: 60000 Ton/Year
Delivery Time: 30 days
Packaging Details: Packing in wooden, hexagonal box or other seaworthy ways
Material: Carbon Steel
Steel grade: ST 35 ST 45 ST 52
Standard: DIN 2391
Shape: Round
Applications: for Auto industry / for machinery use / Oil Cylinder Tube / Motorcycle shock absorber
Production method: Seamless Cold Drawn/Rolling
Size range: O.D.:6-350mm W.T.:1-50mm L:max12000mm
Delivery condition: BKW BKS GBK NBK
Payment Terms: T/T L/C D/P D/A WesternUnion MoneyGram Others
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DIN2391 BKW BKS GBK NBK Seamless Precision Cold Drawn Steel Tubes

DIN2391 St35.0 St37.0 St44.0 St45St52.0 BKW BKS GBK NBK Seamless Precision Cold Drawn Steel Tubes


Standard: DIN2391 Seamless Cold Drawn/Rolling Steel Tubes


Applications: for Auto industry / for machinery use / Oil Cylinder Tube / Motorcycle shock absorber


Auto shock absorber inner cylinder / Telescopic Cylinders


Size range: O.D.:6-350mm W.T.:1-50mm L:max12000mm


Materials:

The tubes are manufactured from electric steel or basic oxygen stel, the melting and casting processes being at the discretion of the manufacturer.

The steel is cast as killed steel


Apperance:

Tubes have a smooth internal and external surface with the cold working process


Tube ends:

Square cut, no burrs

Steel Grade and Chemical Compositions:

Steel GradeCSiMnPS
maxmaxmaxmax
ST350.170.35≥0.400.0250.025
ST450.210.35≥0.400.0250.025
ST520.220.35≥1.600.0250.025

Mechanical properties at room temperature
Steel GradeMinimum values for the delivery condition
BKWBKSGBK(+N) NBK
ST3548064201042031514340-47023525
ST455805520852037512440-57023521
ST526404580758042010490-63035522


Note: Special steel grade is also available, according to customer request.


Final Supply Condition:

BK - Cold finish (hard)

Tubes do not undergo heat treatment following the final cold forming and, thus

have a rather high resistance to deformation


BKW - Cold finished(soft)

The final heat treatment is followed by cold drawing involving limited deformation.

Appropriate further processing allow a certain degree of cold forming (bending,

expanding)


BKS - Cold finished and stress-relieved

Heat treatment is applied following the last cold forming process. Subject to appropriate processing conditions, the increase in the residual stresses involved enables both forming and machining to a certain degree.


GKB - Annealed

The last cold forming process is followed by annealing in a controlled atmosphere.


NBK - Normalized

The last cold forming process is followed by annealing above the upper transformation point in a controlled atmosphere.


Testing:

1. dimensional chec

2. surface inspection

3. tensile test as DIN EN10002 Part 1

4. flattening test, as DIN EN10233

5. drift expanding test as DIN EN10234


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DIN2391-1 standard does not cover the following standard:

-seamless circular unalloyed steel tubes subject to special requirements ( DIN1629)

-high performance seamless circular unalloyed steel tubes (DIN1630)

-seamless circular steel tubes for structural steel work (DIN17121)

-seamless circular fine grain steel tubes for structural steelwork (DIN17124)

-seamless circular tubes made from steel with low-temperature toughness (DIN17173)

-seamless tubes made from steel with elevated temperature properties (DIN17175)

-seamless circular fine grain steel tubes subject to special requirements (DIN17179)

-seamless circular austenitic stainless steel tubes subject to special requirements (DIN17458)

-steel pipes for conveying combustible liquids and gases (DIN17171)


Cheap DIN2391 BKW BKS GBK NBK Seamless Precision Cold Drawn Steel Tubes for sale
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