high pressure low carbon seamless hydraulic cylinder steel tube

 commodity name

Cylinder ID

Thickness

30-250mm

2-30mm

Standard

EN10305/DIN2391

ASTM /AISI

GB/T 8162/ 8163

Material

China

20# 45#(CK45) 16Mn(ST52) 25Mn 27SiMn etc.

German

St42-2 DIN1626,St45-8 DIN17175,St45-4 DIN1629,CK45,St52 DIN1629

American

ASTM A53-B,ASTM A106-B,ASTM A178-C,ASTM A1045,ASTM A210-C etc.

Length

as your requirements

max: 14m/45.9feet

Surface treatment

Black painting, black varnish, transparent oil, or according to the customer’s acquirement

Technique

Seamless

cold drawn /cold rolling /honing/skiving and roller

Usage

1.Hydraulic cylinder /pneumatic cylinder

2. Pumps

3.Motor shells

4.Transmission shafts

5.Transmission roller steel pipes

6.Casing Tube

7.Boiler pipe

Package

1. Bundle packing.

2. Bevelled end or plain end or warnished as your required.

3. Painting varnish coating on the pipe.

4. Plastic caps at ends.

MOQ

Delivery time

as your needs

within 25 days 

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

1.100% PMI,Spectro Chemical Aanlysis Test for Raw Material

2.100% Dimension & Visual Examination 

3. Mechanical Properties Test Include Tension Test,Flaring Test (For Seamless tube/pipe)/ Flange Test (For Welded Pipe & Tube), Hardness Test ,Reversed Flattening Test

4.100% Hydrostatic Test or 100% NON-DESTRUCTIVE Test  (ET or UT) 

5.Radiographic Test for Welded Pipe (shall be accordance with specification,or shall be as agreed upon between the purchaser and vendor)

6.Straightness Test  (optional)

7.Roughness Test (optional)

8.Intergranular Corrosion Test(optional)

9.Impact Test (optional)

10.Grain Size Determinations (optional)

NOTES : ALL THE TESTS AND INSPECTION RESULT NEED TO BE SHOWED IN REPORTS ACCORDING TO STANDARD AND SPECIFICATION.