Honed SMLS Steel Pipe St52 DIN2391 For Cylinder Tubing

Product Details

Honed SMLS Steel Pipe St52 DIN2391 for Cylinder Tubing

Outer diameter: 25mm -500mm 
Wall thickness: 2-50mm
Material: ST52, ST35, ST45
Standard: GB/T8713-88, GB/T3639-2009, DIN2391, EN10305

Honed tubes can be produced according to the demands of costumers that the degree of precision can reach H8/H9. Burnishing and honing service can be provided depending on the roughness requirement of inner diameter.

Material & Chemical Composition:
DIN2391 standard ST52, EN10305 standard E355, 16Mn, ASTM A106B, C20/20#, CK45

Product Name

St35 steel 

pipe

St45 steel 

pipe

St55  

steel pipe

St52 steel 

pipe

chemical 

analysis

C:=0.18; 

P:=0.05; 

S:=0.05

C:=0.25; P:=0.05; 

S:=0.05

C˜0.36; P:=0.05; S:=0.05

C:=0.20; Si=0.55;Mn=1.5;

P:=0.05; S:=0.05

Tensile Strength

+NBK,35-45MPa; +BK,=45MPa;+BKW,

=38MPa;+GBK,=32MPa

+NBK,45-55MPa; +BK,=55MPa;+BKW,

=48MPa;+GBK,=40MPa

+NBK,55-65MPa; +BK,=65MPa; +GBK,=50MPa

+BK,=60MPa;

+BKW,=55MPa;

Yield strength

+NBK,=24M Pa

+NBK,=26MPa

+NBK,=30MPa

-

Standard

DIN2391-1

Length

As customer's request

Packaging

Standard export packing, packed in woven bags, with two nylon slings, or can be customized as request

Heat Treatment/      Delivery Condition

Cold finished (hard)   BK(+C)
Tubes do not undergo heat treatment following the final cold forming and, thus, have a rather high resistance to deformation
Cold finished (soft)  BKW(+LC)
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 annealing BKS(+SR)
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 (+A)
The last Cold forming process is followed by annealing in a controlled atmosphere.
Normalized  NBK (+N)
The last cold forming process is followed by annealing above the upper transformation point in a controlled atmosphere.

Delivery Time

Within 35-50 days from receiving deposit

Payment Term

100% L/C at sight or 30% deposit, 70% balance against copy of B/L

Usage/Application

Pipes for automobile and motorcycle

Dimension tolerance:

Inner Dia (mm)

ID Tolerance (mm)

WT Tolerance (mm)

H7

H8

H9

H10

H11

30

+0.021/0

+0.038/0

+0.052/0

+0.084/0

+0.130/0

±5-10%

>30-50

+0.025/0

+0.039/0

+0.062/0

+0.100/0

+0.160/0

>50-80

+0.030/0

+0.046/0

+0.074/0

+0.120/0

+0.190/0

>80-120

+0.035/0

+0.054/0

+0.087/0

+0.140/0

+0.220/0

>120-180

+0.040/0

+0.063/0

+0.100/0

+0.160/0

+0.250/0

>180-250

+0.046/0

+0.072/0

+0.115/0

+0.185/0

+0.290/0

>250-315

+0.052/0

+0.081/0

+0.130/0

+0.210/0

+0.320/0

>315-400

+0.057/0

+0.089/0

+0.140/0

+0.230/0

+0.360/0

Product description

Processing Form

I. D

Length

Straightness

I. D Tolerance

I. D Roughness

Cold-rolled

30-100

= 12M

0.3-1.0

H8-H10

0.4-1.6

Cold-drawn

30-250

= 12M

0.3-1.0


0.8-1.6

Hone

40-500

= 12M

1000

H8-H9

0.4-0.8

SRB

40-400

= 7M

1000

H8-H9

0.1-0.4

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Any questions or inquiries will be highly appreciated.

Kindly please contact us freely at gracewang@ruichengsteel.cn

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