Tel: +86-187 6566 3008
E-mail: patrick@longyuehydraulic.com

Contact

Qingzhou Longyue Hydraulic Machinery Co.Ltd

Add: No.2878, Haidai North Road, Economic Development Zones, Qingzhou, Shandong Province, China
Tel/Fax: +86-536-3295150
Mobile: +86-187 6566 3008
E-mail: longyueyeya@qq.com; patrick@longyuehydraulic.com
Web: www.longyuehydraulic.com; www.leonhydraulic.com
alibaba site: 
https://qzlongyue.en.alibaba.com 


ST52 Honed Tube

ST52 Honed Tube

As one of the professional st52 honed tube suppliers in China, it is waiting for you to wholesale e355 honed tube at low price form our factory. ST52 Hone Tube Product Specification 1. Standard specification&material: EN10305-1 E355 and equivalent standard and material like DIN2391-2 ST52....

Products Specification:

As one of the professional st52 honed tube suppliers in China, it is waiting for you to wholesale e355 honed tube at low price form our factory.

ST52 Hone Tube



Product Specification


1. Standard specification&material: EN10305-1 E355 and equivalent standard and material like DIN2391-2 ST52.

2. Size range: 40mm*30mm - 480mm*450mm

3. Manufacture method: cold rolled, hydraulic cold drawn

4. Delivery condition: 

BK

BKW

BKS

GBK

NBK

+C

+LC

+SR

+A

+N

5. Internal surface treatment method: honing or skiving and roller burnishing

6. OD tolerance: as per EN10305-1

7. ID tolerance: H7,H8,H9,H10 or given by customer.

8. W.T tolerance(eccentricity): +/-5%

9. Bore roughness(Ra): 0.35um max.




Mechanical Properties


Chemical composition requirement of E355 material:

Element

C

Si

Mn

P

S

Content (%)

0.22% max

0.55% max

1.60% max

0.025% max

0.025% max


Mechanical properties of E355 tubes:



BK

BKW

BKS

GBK

NBK

Tensile strength:

640 Mpa min

580 Mpa min

580 Mpa min

450 Mpa min

490Mpa-630Mpa

Yield strength

-

-

450 Mpa min

355 Mpa min

Elongation

4% min

7% min

10% min

22% min

22% min




Dimension Tolerance



Size of ID (mm)

     
     ID Tolerance


Tolerance of wall thickness

H7

H8

H9

H10

H11


30

+0.021
0

+0.033
0

+0.052
0

+0.084
0

+0.130
0





±5%

>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



Our Advantages

 

1): Durable, strict quality management and control, we are an ISO9001 enterprise.

2): High precision machining equipment guarantee good quality.

3): Smooth surface. No defects. Continuous skill  improvements.

4): We have design team to develop new skill and new products to meet customer’s      requirements 

5): Good after-service, when customers have problems during use, we will surely try our best to solve them.

6): High professional employees have good emergency-dealing ability during production.

7): Surface treatment can be nickel, galvanized and painted, or based on the requirements of customers.


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Packing & Shipping


1. In bulk (Large OD)

2. In bundle with steel strips (Small OD)

3. With woven cloth

4. A per customer's requirements

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About Us


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Application


The honing and finished rolling tube, have been widely used in many industries, such as hydraulic cylinder, petrochemical sand pumping vessel, shipping, construction machinery, mining machine, filling machine and agricultural machine,etc.

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