BS 6323 DIN 2391 Precision Steel Tube , BK BKS BKW Mechanical Steel Tubing for Hydraulic
Product Description:
Benifits of the precision steel tube:
(1) No Oxidation Layer on the outer and inner walls;
(2) No Leakage under high pressure;
(3) No Crake under flating and flattening;
(4) No distortion after cold bending;
(5) High precision high cleanness;
(6) Excellent brightness
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standard
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GB/T3639-2000
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DIN2391
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EN10305
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ASTM A519
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metarial
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C20 CK45 Q355B Q355D
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E355/ST52 SAE1026
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4130 4140
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STKM 13C
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Heat treatment
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BK+S
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size
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I.D:30mm-400mm
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O.D:40mm-480mm
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length
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Fixed length
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Random length or as requests of customers
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Straightness
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1/1000
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Technology
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Honed SRB(SKIVED AND ROLLER BURNISHED)
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Scope
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Honed tube for hydraulic cylinder,swivel crane,injection machine and construction machine application
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Chemical Composition:
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Steel grade |
Chemical composition, as a percentage by mass |
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Symbol |
Material number |
C |
Si |
Mn |
P |
S |
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St 30 Si |
1.0211 |
0.10 |
0.30 |
<=0.55 |
0.025 |
0.025 |
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St 30 Al |
1.0212 |
0.10 |
0.05 |
<=0.55 |
0.025 |
0.025 |
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St 35 |
1.0308 |
0.17 |
0.35 |
<=0.40 |
0.025 |
0.025 |
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St 45 |
1.0408 |
0.21 |
0.35 |
<=0.40 |
0.025 |
0.025 |
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St 52 |
1.0580 |
0.22 |
0.55 |
<=1.60 |
0.025 |
0.025 |
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The following alloying elements may be added: Nb: <=0,03%; Ti: <=0,03%; V: <=0,05%; Nb + Ti + V: <=0,05%. |
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Final Supply Conditions:
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Designation |
Symbol |
Description |
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Cold finished (hard) |
BK |
Tubes do not undergo heat treatment following the final cold forming and, thus, have a rather high resistance to deformation. |
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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). |
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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. |
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Annealed |
GBK |
The last cold forming process is followed by annealing in a controlled atmosphere. |
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Normalized |
NBK |
The last cold forming process is followed by annealing above the upper transformation point in a controlled atmosphere. |
Condition on Delivery:
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Steel Grade |
BK |
BKW |
GBK |
NBK |
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Code No. |
Tensile Strength N/mm2 min |
Elongation at rupture N/mm2 min |
Tensile Strength N/mm2 min |
Elongation at rupture N/mm2 min |
Tensile Strength N/mm2 min |
Elongation at rupture N/mm2 min |
Tensile Strength N/mm2 min |
Elongation at rupture N/mm2 min |
|
St30 Si |
400 |
8 |
330 |
12 |
280 |
30 |
290-420 |
30 |
|
St30 Al |
400 |
8 |
330 |
12 |
280 |
30 |
290-420 |
30 |
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St 35 |
440 |
6 |
370 |
10 |
315 |
25 |
340-470 |
25 |
|
St 45 |
540 |
5 |
470 |
8 |
390 |
21 |
440-570 |
21 |
|
St 52 |
590 |
4 |
540 |
7 |
490 |
22 |
490-630 |
22 |
Detailed Photo:
Factroy Pictures:
Pipe & Tube Processing:
Steel Pipe & Tube Application:
Packaging and Shipping:
Certificates:
FAQ:
Q1: ARE YOU FACTORY OR TRADER?
A1: Wuxi Sylaith Special Steel Co.,Ltd is a manufacturer of steel pipe and tube since 2010. We've gained our Export Right and become an integrated company of industry and trade in order to satisfy buyer's multi-request on different material and products.
Q2: WHICH MATERIAL/PRODUCTS YOU CAN PROVIDE?
A2: Seamless Stainless Steel Pipe / Tube, Seamless Carbon Stainless Steel Pipe /Tube,Galvanized Steel Tube witn any Shape and Welded pipes can also be available.
Q3: HOW TO GET A SAMPLE?
A3: FREE samples are available for your checking and testing. And to get free samples, you need to send us you detailed receiving address (including post code) and your DHL/FedEx/UPS account for collecting samples, courier cost will be paid in your side.
Q4:CAN YOU PRODUCE THE PRODUCTS ACCORDING TO MY OWN DRAWINGS?
A4: Yes, we can produce the products according to your drawings that will be most satisfy you.
Q5: HOW TO VISIT YOUR FACTORY?
A5: Most of the main cities have flights to Shanghai; you can take flight to Shanghai Putong/Hongqiao International Airport.
If you come from Hongkong, it will take 2 hours by flight (every day 5 flight around noon time).
