cold rolled precision pneumatic cylinder steel tube

Dmension

O.D.30-250mm W.T.:2-30mm  L: according to the customer’s need

Steel Grade

10#,20#,45#,16Mn, ST35, ST37,ST37.4,ST45,ST52,ST52.4, E255,E355,Q345 etc

Standards

DIN /ASTM /GB/ EN/ etc

Delivery Condition

NBK(+N), GBK(+A), BK(+C) ,BKW(+LC) ,BKS(+SR)

Application

Automotive pipeline system; hydraulic system of diesel engine and engineering machinery; hydraulic system of locomotive, aerospace and aviation, shipbuilding and various machinery; metal processing of wind power equipment;

Surface treatment

According the customer’s acquirements

Packing

We usually bundle with steel strips ,branding parcel or wooden box outside ,or according to the customer’s need

Certificate

ISO 9001:2008

Basic Inspection

Chemical analysis ,mechanical testing, eddy current test and ultrasonic

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