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DIN 2391 St 30 Si / St 30 Al Thin Wall Seamless Steel Tubes Length 6m , 9m , 12 , 24m

Categories Seamless Steel Tubes
Place of Origin: Jiangsu China (Mainland)
Brand Name: JIANGSU HUACHENG
Certification: ISO9001 14001 BV TUV PED DNV etc
Model Number: HC
MOQ: 5MT
Packaging Details: Exporting package/wooden box package/Or per customers’ requirement
Delivery Time: 25~35days
Payment Terms: 30%T/T in advance or 100% L/C at sight
Supply Ability: 8000MT/Month
Application: Fluid Pipe
Delivery Condition: Annealed|Normalized|Tempered|Heat treatment|BK|BKS|BKW|NBK|GBK
Grade: T4|St45|St 35|St 52|St 30 Al
Product Name: Seamless Steel Tubes
Section Shape: Round
Standard: DIN 2391
Surface treatment: Oil-dip|Varnish|Phosphating|Passivation|Shot Blasting
Technique: Seamless
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DIN 2391 St 30 Si / St 30 Al Thin Wall Seamless Steel Tubes Length 6m , 9m , 12 , 24m

DIN 2391 St 30 Si / St 30 Al Thin Wall Seamless Steel Tubes Length 6m , 9m , 12 , 24m


Quick Detail:


Standard: DIN 2391

Grade: St 30 Si / St 30 Al / St 35 / St45 / St 52
Size:(mm)

Out Dimensions: 6 mm ~ 350 mm
Wall Thickness: 0.8 mm ~30mm
Length: Fixed(6m,9m,12,24m) or normal length(5-12m)


Description:


Main grade we supply for DIN 2391

St 30 Si / St 30 Al / St 35 / St45 / St 52


Delivery Condition:

Heat treatment,Annealed, Normalized, Normalized and Tempered


Packing:
Beveled/black painting/ plastic caps/ in bundles/ steel strips/ wooden protection


Inspection and Test:
Chemical Composition Inspection, Mechanical Properties Test(Tensile Strength, Yield Strength,Elongation, Flaring, Flattening, Bending, Hardness, Impact Test),Surface and Dimension Test,Nodestructive Test, Hydrostatic Test.

Surface treatment:

Oil-dip, Varnish, Passivation, Phosphating, Shot Blasting

Painting as requested.


Chemical Composition:


Steel grade

Chemical composition, as a percentage by mass

Symbol

Material number

C
max.

Si
max.

Mn

P
max.

S
max.

St 30 Si

1.0211

0.10

0.30

<=0.55

0.025

0.025

St 30 Al

1.0212

0.10

0.05

<=0.55

0.025

0.025

St 35

1.0308

0.17

0.35

<=0.40

0.025

0.025

St 45

1.0408

0.21

0.35

<=0.40

0.025

0.025

St 52

1.0580

0.22

0.55

<=1.60

0.025

0.025

The following alloying elements may be added: Nb: <=0,03%; Ti: <=0,03%; V: <=0,05%; Nb + Ti + V: <=0,05%.


Final supply conditions:


Designation

Symbol

Description

Cold finished (hard)

BK

Tubes do not undergo heat treatment following the final cold forming and, thus, have a rather high resistance to deformation.

Cold finished (soft)

BKW

The final heat treatment is followed by cold drawing involving limited deformation. Appropriate further processing allows a certain degree of cold forming (e.g. bending, expanding).

Cold finished and stress-relieved

BKS

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.

Annealed

GBK

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

Normalized

NBK

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


Condition on delivery:


Steel Grade

BK

BKW

GBK

NBK

Code No.

Tensile

Strength

N/mm2 min

Elongation at rupture N/mm2 min

Tensile

Strength

N/mm2 min

Elongation at rupture N/mm2 min

Tensile

Strength

N/mm2 min

Elongation at rupture N/mm2 min

Tensile

Strength

N/mm2 min

Elongation at rupture N/mm2 min

St30 Si

400

8

330

12

280

30

290-420

30

St30 Al

400

8

330

12

280

30

290-420

30

St 35

440

6

370

10

315

25

340-470

25

St 45

540

5

470

8

390

21

440-570

21

St 52

590

4

540

7

490

22

490-630

22


Other Terms:


Scope: This standard defines the technical delivery conditions for seamless precision steel tubes according to DIN 2391 Part 1 which are made from the steel grades listed in section. Tubes according to this standard are mainly used where accuracy to dimension and possibly, small wall thickness and good surface condition are required.

Shape: The tubes shall be furnished in the following shapes, as specified by the purchaser: round, square,rectangular and special sections.


Competitive Advantage:


Huacheng Industry Pipe Making Corporation

Asia Leading Steel Pipe & Tube Manufacturer with more than 250,000Tons/Year, >60% shipped to more than 35 Countries.We aims at manufacturing quality pipes & tubes with reasonable and competitive price, good quality for our global customers.


Factroy Pictures:


Pipe & Tube Processing

Factory Equipments:


Production Line:

Quality Control:



Steel Pipe & Tube Application:

Package:

Export Standard / Wooden Box

Main Certificates:

PED ISO BV TUV etc.

Main Customers:


Quality DIN 2391 St 30 Si / St 30 Al Thin Wall Seamless Steel Tubes Length 6m , 9m , 12 , 24m for sale
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