EN10305-4 E235+NBK Precision Hydraulic Steel Tube for hydraulic systems
Product Detail
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.
Advantages
Certificates: according to EN 10204 3.1
Inspection Items:
Tensile strength,
Yield strength,
Elongation,
Flattening,
Flaring
Chemical analysis
Eddy Current Test 100%,
Size and surface checking 100%
Other test item can be arranged as per request
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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|
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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 |
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22 |
22*1 |
22*1.5 |
22*2 |
22*2.5 |
22*3 |
22*3.5 |
22*4 |
22*4.5 |
22*5 |
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25 |
25*1 |
25*1.5 |
25*2 |
25*2.5 |
25*3 |
25*3.5 |
25*4 |
25*4.5 |
25*5 |
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28 |
28*1 |
28*1.5 |
28*2 |
28*2.5 |
28*3 |
28*3.5 |
28*4 |
28*4.5 |
28*5 |
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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 |
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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 |
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38*2 |
38*2.5 |
38*3 |
38*3.5 |
38*4 |
38*4.5 |
38*5 |
38*6 |
|
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 |
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42*2 |
42*2.5 |
42*3 |
42*3.5 |
42*4 |
42*4.5 |
42*5 |
42*6 |
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45 |
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45*2 |
45*2.5 |
45*3 |
45*3.5 |
45*4 |
45*4.5 |
45*5 |
45*6 |
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46 |
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46*2 |
46*2.5 |
46*3 |
46*3.5 |
46*4 |
46*4.5 |
46*5 |
46*6 |
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48 |
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48*2 |
48*2.5 |
48*3 |
48*3.5 |
48*4 |
48*4.5 |
48*5 |
48*6 |
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50 |
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50*2 |
50*2.5 |
50*3 |
50*3.5 |
50*4 |
50*4.5 |
50*5 |
50*6 |
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54 |
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54*2.5 |
54*3 |
54*3.5 |
54*4 |
54*4.5 |
54*5 |
54*6 |
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60 |
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60*2.5 |
60*3 |
60*3.5 |
60*4 |
60*4.5 |
60*5 |
60*6 |
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65 |
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65*3 |
65*3.5 |
65*4 |
65*4.5 |
65*5 |
65*6 |
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75 |
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75*3.5 |
75*4 |
75*4.5 |
75*5 |
75*6 |
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76 |
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76*4 |
76*4.5 |
76*5 |
76*6 |
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89 |
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89*6 |
| 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
Application
