OEM Factory for Tianjin factory 40*40*2.2mm Galvanized Square Steel Pipe Zinc coating tube
The company keeps to the operation concept “scientific management, high quality and efficiency primacy, customer supreme for OEM Factory for Tianjin factory 40*40*2.2mm Galvanized Square Steel Pipe Zinc coating tube, Good quality, timely services and Aggressive price tag, all win us a excellent fame in xxx field despite the international intense competition.
The company keeps to the operation concept “scientific management, high quality and efficiency primacy, customer supreme for E355 precision hydraulic steel tube, Our company is working by the operation principle of “integrity-based, cooperation created, people oriented, win-win cooperation”. We hope we can have a friendly relationship with businessman from all over the world.
Product Detail
Name: EN10305-4 E3555+NBK Precision Hydraulic Steel Pipe
Standard: EN10305-4
Type: Cold rolled/cold drawn
Grade: E355/E215/E235
Size: OD4mm-219mm WT0.5mm-25mm
Condition: BK/NBK/GBK etc.
Mill Test Certificate: EN10204 3.1
Processing: Bending/ Cutting/Flattening/Flaring
EN10305-4 steel tubes could be bending, flaring and flattening without crack. It has high precision, on oxide layer on both sides of the tube. It can be used for various complex deformation and machining. EN10305 high precision steel tube is usually used for hydraulic cylinder, diesel, hydraulic pump station and hydraulic system which are require the steel tube in high precision and cleanliness.
Applications
A. Hydraulic circuits (HPL), pneumatic lines, and hydraulic suspension
B. Hydraulic cylinders (HPZ)
Electric heater fields like metal tube heater,hot runner,thermostat,heating apparatus,air conditioning,refrigerators and other household appliances,heating etc.
Food and beverage,petroleum chemical industry,heat ex-changer,condenser,marine environment,paper making,chemical fertilizer,instrumentation,medical.
Automotive engineering,aerospace,pipe structure,pricing textile and etc.
Advantages
Specification
|
Standard |
EN10305 DIN2391 DIN1630 DIN2445 JIS G3445 SAE J524 |
|
Grade |
ST35/E235 ST37.4 ST45/E255 ST52/E355 |
|
Delivery Condition |
NBK(+N) BK(+C) GBK(+A) BKW(+LC) BKS(+SR) |
|
Size |
OD:4 to 219mm Thickness 0.5-35mm, Length: 3m,5.8,6 or according to requirements |
|
Finish |
Galvanized surface (Sliver/Yellow/Colorful) Zinc coating of 8-12um |
|
Application |
Hydraulic System; Car/bus; construction vehicle |
|
Delivery time |
A.3 days if this good is stock goods. B. About 30 days according to the quantity |
|
HYDRAULIC PRECISION STEEL TUBE IN STOCK |
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|
OD |
Thickness(mm) |
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|
mm |
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|
4 |
4*1 |
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|
6 |
6*1 |
6*1.5 |
6*2 |
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|
8 |
8*1 |
8*1.5 |
8*2 |
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|
10 |
10*1 |
10*1.5 |
10*2 |
10*2.5 |
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|
12 |
12*1 |
12*1.5 |
12*2 |
12*2.5 |
12*3 |
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|
14 |
14*1 |
14*1.5 |
14*2 |
14*2.5 |
14*3 |
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|
15 |
15*1 |
15*1.5 |
15*2 |
15*2.5 |
15*3 |
15*3.5 |
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|
16 |
16*1 |
16*1.5 |
16*2 |
16*2.5 |
16*3 |
16*3.5 |
16*4 |
16*4.5 |
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|
18 |
18*1 |
18*1.5 |
18*2 |
18*2.5 |
18*3 |
18*3.5 |
18*4 |
18*4.5 |
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|
20 |
20*1 |
20*1.5 |
20*2 |
20*2.5 |
20*3 |
20*3.5 |
20*4 |
20*4.5 |
20*5 |
|
|
22 |
22*1 |
22*1.5 |
22*2 |
22*2.5 |
22*3 |
22*3.5 |
22*4 |
22*4.5 |
22*5 |
|
|
25 |
25*1 |
25*1.5 |
25*2 |
25*2.5 |
25*3 |
25*3.5 |
25*4 |
25*4.5 |
25*5 |
|
|
28 |
28*1 |
28*1.5 |
28*2 |
28*2.5 |
28*3 |
28*3.5 |
28*4 |
28*4.5 |
28*5 |
|
|
30 |
30*1 |
30*1.5 |
30*2 |
30*2.5 |
30*3 |
30*3.5 |
30*4 |
30*4.5 |
30*5 |
30*6 |
|
32 |
32*1.5 |
32*2 |
32*2.5 |
32*3 |
32*3.5 |
32*4 |
32*4.5 |
32*5 |
32*6 |
|
|
34 |
34*1.5 |
34*2 |
34*2.5 |
34*3 |
34*3.5 |
34*4 |
34*4.5 |
34*5 |
34*6 |
|
|
35 |
35*1.5 |
35*2 |
35*2.5 |
35*3 |
35*3.5 |
35*4 |
35*4.5 |
35*5 |
35*6 |
|
|
38 |
38*2 |
38*2.5 |
38*3 |
38*3.5 |
38*4 |
38*4.5 |
38*5 |
38*6 |
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|
40 |
40*2 |
40*2.5 |
40*3 |
40*3.5 |
40*4 |
40*4.5 |
40*5 |
40*6 |
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|
42 |
42*2 |
42*2.5 |
42*3 |
42*3.5 |
42*4 |
42*4.5 |
42*5 |
42*6 |
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|
45 |
45*2 |
45*2.5 |
45*3 |
45*3.5 |
45*4 |
45*4.5 |
45*5 |
45*6 |
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|
46 |
46*2 |
46*2.5 |
46*3 |
46*3.5 |
46*4 |
46*4.5 |
46*5 |
46*6 |
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|
48 |
48*2 |
48*2.5 |
48*3 |
48*3.5 |
48*4 |
48*4.5 |
48*5 |
48*6 |
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|
50 |
50*2 |
50*2.5 |
50*3 |
50*3.5 |
50*4 |
50*4.5 |
50*5 |
50*6 |
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|
54 |
54*2.5 |
54*3 |
54*3.5 |
54*4 |
54*4.5 |
54*5 |
54*6 |
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|
60 |
60*2.5 |
60*3 |
60*3.5 |
60*4 |
60*4.5 |
60*5 |
60*6 |
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|
65 |
65*3 |
65*3.5 |
65*4 |
65*4.5 |
65*5 |
65*6 |
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|
75 |
75*3.5 |
75*4 |
75*4.5 |
75*5 |
75*6 |
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|
76 |
76*4 |
76*4.5 |
76*5 |
76*6 |
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|
89 |
89*6 |
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| Note： We could produce other sizes as your requirements. Surface Treatment: Bright, Galvanized, Phosphated etc. | ||||||||||
Chemical Composition
|
Steel Grade |
C |
Si |
Mn |
P |
S |
Al |
|
|
Name |
No. |
max |
max |
max |
max |
max |
max |
|
E215 |
1.0212 |
0.1 |
0.05 |
0.7 |
0.025 |
0.015 |
0.025 |
|
E235 |
1.0308 |
0.17 |
0.35 |
1.2 |
0.025 |
0.015 |
— |
|
E355 |
1.058 |
0.22 |
0.55 |
1.6 |
0.025 |
0.015 |
— |
|
ST35 |
1.0308 |
0.17 |
0.35 |
0.4（min） |
0.025 |
0.025 |
— |
|
ST45 |
1.0408 |
0.21 |
0.35 |
0.4（min） |
0.025 |
0.025 |
— |
|
ST52 |
1.058 |
0.22 |
0.55 |
1.6 |
0.025 |
0.025 |
— |
Mechanical properties
|
Steel Grade |
Yield Strength (Mpa) | Tensile Strength (Mpa) | Elongation（%） | |
|
Name |
No. |
ReH (min) | Rm(min) |
A(min) |
|
E215 |
1.0212 |
215 |
290 to 430 |
30 |
|
E235 |
1.0308 |
235 |
340 to 480 |
25 |
|
E355 |
1.058 |
355 |
490 to 630 |
22 |
|
ST35 |
1.0308 |
235 |
340 to 480 |
25 |
|
ST45 |
1.0408 |
255 |
440 to 570 |
21 |
|
ST52 |
1.058 |
355 |
490 to 630 |
22 |
Tolerance
|
OD |
Allowable tolerance |
Special Tolerance |
||
|
GB/T3639 |
DIN2391 |
OD |
WT |
|
|
4mm-20mm |
±0.10mm |
±0.08mm |
±0.05mm |
±0.05mm |
|
20mm-30mm |
±0.10mm |
±0.08mm |
±0.08mm |
±0.08mm |
|
31mm-40mm |
±0.15mm |
±0.15mm |
±0.10mm |
±0.08mm |
|
41mm-60mm |
±0.20mm |
±0.20mm |
±0.15mm |
±0.15mm |
|
61mm-80mm |
±0.30mm |
±0.30mm |
±0.20mm |
±0.20mm |
|
81mm-120mm |
±0.45mm |
±0.45mm |
±0.30mm |
±0.30mm |
Delivery Condition
|
Designation |
Symbol |
Description |
| Cold finished (hard) | BK(+C) | Tubes do not undergo heat treatment following the final cold forming and, thus, have a rather high resistance to deformation |
| Cold finished (Soft) | BKW | The final heat treatment is followed by cold drawing involving limited deformation. Appropriate further processing allows a certain degree of cold forming (e.g. bending, expanding) |
| (+LC) | ||
| Cold finished and stress-relieved | BKS(+SR) | Heat treatment is applied following the last cold forming process. Subject to appropriate processing conditions, the increase in the residual stresses involved enables both forming and machining to a certain degree. |
| Annealed | GBK(+A) | The last Cold forming process is followed by annealing in a controlled atmosphere. |
| Normalized | NBK(+N) | The last cold forming process is followed by annealing above the upper transformation point in a controlled atmosphere. |
Quality Assurance
1.Strict according to DIN2391/EN10305 or other standards.
2. Sample: Sample is free for test.
3. Tests: Salt spray test/Tensile test / Eddy current / Chemical composition test according to customers’ request
4.Certificate: IATF16949, ISO9001, SGS etc.
5.EN 10204 3.1 Certification
Product packaging
DIN/EN series high-precision precision bright seamless steel pipes, hydraulic system specific steel pipes, automotive manufacturing specific steel pipes, DIN2391, DIN2445, EN10305, GB/T 3639 GB 8713 Materials: ST35 (E235), ST37, ST45 (E255), ST52 (E355), 10 #, 20 #, 35 #, 45 # Delivery status NBK (+N) GBK (+A) BK (+C) BKW (+LC) BKS (+SR)
Introduction to the European standard EN10305-4:2003 for hydraulic steel pipes: The precision hydraulic steel pipes produced are seamless pipes after precision cold drawing, which are made by oxygen free tempering treatment to eliminate surface and internal stress, and then undergo phosphating and rust prevention treatment. The product has high dimensional accuracy, good ductility, and is easy to machine and bend into various required shapes without reducing or flattening the pipe cross-section; The surface accuracy of the pipe is high, and the surface hardness is moderate after oxygen free tempering treatment, which is easy to connect with the sleeve. The inner hole and surface can be directly installed without the need for acid cleaning and rust removal after phosphating and rust prevention treatment.
