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 


25Mn Rolled Tube

25Mn Rolled Tube

As one of the professional 25mn rolled tube suppliers in China, it is waiting for you to wholesale 25mn rolled tube at low price form our factory. 25Mn Rolled Tube Product Specification Cylinder ID: 40mm-400mm Thickness:≥4mm Material:20#(A106B,C20),45#(CK45),16Mn(ST52,E355),25Mn,27SiMn...

Products Specification:

As one of the professional 25mn rolled tube suppliers in China, it is waiting for you to wholesale 25mn rolled tube at low price form our factory.

25Mn Rolled Tube 



Product Specification


Cylinder ID: 40mm-400mm Thickness:≥4mm

Material:20#(A106B,C20),45#(CK45),16Mn(ST52,E355),25Mn,27SiMn

Standard:GB/T8713-88 ISO4394/1-1980(EN0305,DIN2391)



Standard

EN10305/DIN2391

ISO4394/1-1980

GB/T8713-88

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, hot galvanized, 3PE, epoxy coating,BE,PE.etc.

Technique

Seamless & welded
cold drawn /cold rolling /honing

Usage

1.hydraulic cylinder /pneumatic cylinder
2.Low and middle pressure fluid transportation pipeline
3.Casing Tube
4.Boiler Pipe
5.Petroleum and natural gas industry
6.Chemistry industry
7.Electric industry







Mechanical Properties



Steel Grade

Tensile strength

(σb N/mm2)

Yield strength

(σs N/mm2)

Elongation

(δ %)

Hardness;

HB

   20#

≥520

≥470

≥12

175

45#(CK45)

≥600

≥520

≥12

207

16Mn(ST52)

≥600

≥520

≥15

190

25Mn

≥600

≥510

≥15

195

27SiMn

≥800

≥720

≥10

230





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.




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




About Us






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.