Bright Annealed Heavy Wall Cold Drawn Precision Steel Tube, EN10305-1 E215, E235, E355 Precision Steel Tubing for Hydraulic System
Brief Introduction:
Standard: EN10305-1, EN10305-4, BS 6323
Grade: E215 / E235 / E355
Out Dimensions: 5 mm ~ 70 mm
Wall Thickness: 0.8 mm ~10mm
Length: Cut-to-length (6m,9m,12,24m) or normal length(5-12m)
Precision steel tube
Precision in size, Bright surface, High performance
Standard: EN10305-1, EN10305-4, BS 6323, ISO 8535
STEEL GRADE: E215 / E235 / E355
APPLICATIONS:
Automobile, engineering vehicles, diesel, chemical engineering machinery, refrigerating equipment for electric appliance and electric heating system.
Tests we apply to the tubes:
1) Chemical Composition Analysis
2) Mechanical Properties (Tensile strength, Yield strength,, Elongation, Hardness)
3) Technological Test (Flattening test, Flaring Test, Bending Test, Hydraulic pressure test)
4) Surface quality detection
5) Eddy-current examination
6) Visual test
Mill test certificates will be issued according to EN10204/3.1B
Chemical Composition:
| Chemical composition(cast analysis): |
| Steel grade |
% by mass |
| Steel name |
Steel number |
C |
Si |
Mn |
P |
Sb |
AI |
| max. |
max. |
max. |
max. |
max. |
min. |
| E215 |
1.0212 |
0.10 |
0.05 |
0.70 |
0.025 |
0.025 |
0.025 |
| E235 |
1.0308 |
0.17 |
0.35 |
1.20 |
0.025 |
0.025 |
- |
| E355C |
1.0580 |
0.22 |
0.55 |
1.60 |
0.025 |
0.025 |
- |
Mechanical properties at room temperature:
| Mechanical properties at room temperature |
| Steel grade |
Minimum values for the delivery conditiona,b |
| Steel name |
Steel number |
﹢CC |
﹢LCC |
﹢SR |
﹢Ad |
﹢N |
| Rm |
A |
Rm |
A |
Rm |
ReH |
A |
Rm |
A |
Rm |
ReH |
A |
| MPa |
% |
MPa |
% |
MPa |
MPa |
% |
MPa |
% |
MPa |
MPa |
% |
| E215 |
1.0212 |
430 |
8 |
380 |
12 |
380 |
280 |
16 |
280 |
30 |
290 to 430 |
215 |
30 |
| E235 |
1.0308 |
480 |
6 |
420 |
10 |
420 |
350 |
16 |
315 |
25 |
340 to 480 |
235 |
25 |
| E355 |
1.0580 |
640 |
4 |
580 |
7 |
580 |
450f |
10 |
450 |
22 |
490 to 630 |
355 |
22 |
Delivery conditions:
| Designation |
Symbol |
Description |
| Cold finished (hard) |
BK |
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). |
| Cold finished and stress-relieved |
BKS |
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 |
The last cold forming process is followed by annealing in a controlled atmosphere. |
| Normalized |
NBK |
The last cold forming process is followed by annealing above the upper transformation point in a controlled atmosphere. |
Competitive Advantage:
Yaxin Precision Tube Co., Ltd.
Leading precision steel tube supplier in the global market, yield 70,000 tons per year based on both seamless tubing and welded tubing. 100% of tubing is used on automotive industry and hydraulic system.
