DIN 2391 st52 BKS honed and SRB precision seamless steel tube for hydraulic

Product Item

DIN 2391 st52 BKS honed and SRB precision seamless steel tube for hydraulic

Outer Diameter

30mm~250mm

Wall Thickness

2mm~30mm

Material Grade

10#-45#, 16Mn, Q195-Q345, ST35-ST52, STB35-STB42, 20#, 45#, 16Mn, Q345, ST35, St45, St52, St52.4, STB42, 

16Mn,St52,10#-45#,ST35-ST52

Standard

ASTM, DIN, ASTM A1020-2002, DIN 2391

Application

Hydraulic Pipe, Hydraulic cylinder, automobile, oil drilling, 

textile machinery

Certificate

ISO9001:2008 

Process Method

Cold Drawn/ Cold Rolled

Surface Finish

Annealed, Pickled

Package

According to the customer’s requirement 

Delivery Time

10days more or according to the customer’s requirement 

Price Item

FOB CIF EXW

Payment

T/T(30% in advance, 70% against the BL Copy) and L/C 

at sight or as negotiation

ID tolerance

H8,H9b H10 or as customized 

Surface roughness

Ra0.2~0.8µm

Finally supply condition

BK BKS BKW NBK GBK

Mechanics performance:

Material

Tensile strength

Yield strength

Elongation

Hardness

CK20/20#/AISI1020

>520 N/ mm2

>375 N/mm2

>15%

>85HB

CK45/45#/AISI1045

>600 N/ mm2

>520 N/ mm2

>15%

>85HB

ST52/16Mn/Q345D

>600 N/ mm2

>520 N/ mm2

>15%

>85HB

25Mn/STKM 13C-T

>600 N/ mm2

>530 N/ mm2

>15%

>85HB

Variety :

Processing

Cylinder 
Diameter

Straightness

Size 
Accuracy

W.T/mm

Inner Bore Roughess

Cold drawn/cold rolled

ID30-250

0.3

H9-H11

±10%

0.4~1.6um

Honed tube

ID50-250

0.3

H7-H9

±10%

<0.4um

Tolerance on ID:

No.

Inside diameter
(mm)

ID machining allowance
(mm)

1

300-80

0.5-0.8

2

81-125

0.7-1.1

3

125-200

0.9-1.2

4

200-250

1-1.5

Other dimension can be customize