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<title><![CDATA[EC21 Product Catalogs - bk]]></title>
<link><![CDATA[https://www.ec21.com/ec-market/bk--2842/1/bk.html]]></link><item>
<title><![CDATA[BS6323-4 Seamless Steel Pipes /Tubes for Automobile Application]]></title><link><![CDATA[https://lunbaosteeltubes.en.ec21.com/BS6323_4_Seamless_Steel_Pipes--11849819_11867441.html]]></link><description><![CDATA[BK
b. Cold finished/soft (lightly cold worked): BKWc. Annealed: GBK
d. Annealed (including de-scaling): GZF
e. Normalized: NBK
f. Normalized (including de-scaling): NZFSteel Grade:
CFS 3
CFS 3Aa
CFS ]]></description><pubDate><![CDATA[20241120]]></pubDate></item>
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<title><![CDATA[EN10305-1 E355+sr Precision Seamless Hydraulic Cylinder Honed Steel Tube]]></title><link><![CDATA[https://xinpeng6835383.en.ec21.com/EN10305_1_E355_sr_Precision--12009696_12009704.html]]></link><description><![CDATA[
3. ID tolerance: H8, H9, and H10 
4. Surface roughness: R a 0.2— 0. 8 μm 
5. Final supply condition: cold drawn and stress-relieved (BK+S), BK, NBK GBK 
6. Machining allowance: 0.5-1.5mm 
]]></description><pubDate><![CDATA[20240925]]></pubDate></item>
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<title><![CDATA[Black Carbon Seamless Steel Precision Pipes and Tubes for Gas Spring Cylinder]]></title><link><![CDATA[https://wrjeffrey.en.ec21.com/Black_Carbon_Seamless_Steel_Precision--11097939_11206288.html]]></link><description><![CDATA[BK (+C) No heat treatment after last cold forming process.
2. BKW (+LC) After last heat treatment there is a light finishing pass (cold drawing)
3. BKS (+SR) After the final cold forming process the ]]></description><pubDate><![CDATA[20200721]]></pubDate></item>
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<title><![CDATA[Carbon Q235 Round Steel Pipe]]></title><link><![CDATA[https://wendaozhe.en.ec21.com/Carbon_Q235_Round_Steel_Pipe--9876148_9878616.html]]></link><description><![CDATA[BK, BKW etc.) 
9) Trade Terms 
In all, the more detailed information, the more exact price we quote. 
Contact me, let&amp;#39;s talk details! 
Jack Chang 
Sales Manager 
Tel/WhatsApp/WeChat:+861510226350]]></description><pubDate><![CDATA[20171013]]></pubDate></item>
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<title><![CDATA[EN 10204 Gas Spring Cold Drawn Seamless Steel Pipe Precision Carbon Steel Tubes for Shock Absorber]]></title><link><![CDATA[https://hsmpaul.en.ec21.com/EN_10204_Gas_Spring_Cold--11270050_11270153.html]]></link><description><![CDATA[BK (+C) No heat treatment after last cold forming process.
2. BKW (+LC) After last heat treatment there is a light finishing pass (cold drawing)
3. BKS (+SR) After the final cold forming process the ]]></description><pubDate><![CDATA[20201004]]></pubDate></item>
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<title><![CDATA[API 5L Seamless Steel Pipe]]></title><link><![CDATA[https://threewaysteel.en.ec21.com/API_5L_Seamless_Steel_Pipe--4978487_6001117.html]]></link><description><![CDATA[treatment: Annealed: Bright annealed,, Spheroidize annealed, Normalized, Stress relieved, Cold finished, Quenched and Tempered Delivery Conditionï¼BKS, NBK,BK ,BKW, GBK(+A), NBK(+N), BK(+C)
]]></description><pubDate><![CDATA[20111115]]></pubDate></item>
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<title><![CDATA[Factory Directly Supply Hot Rolled Welded Galvanized Drip Irrigation Pipe with Low Price]]></title><link><![CDATA[https://alan3218.en.ec21.com/Factory_Directly_Supply_Hot_Rolled--10961535_10962134.html]]></link><description><![CDATA[BK, BKW etc.) 
9.Trade Terms
P.S.: more detailed information you clarified, more exact price we provided.
Click &quot;Send&quot; to send us inquiry to get free sample!
Steel Pipes: An Introduction
A steel pipe]]></description><pubDate><![CDATA[20190529]]></pubDate></item>
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<title><![CDATA[ST35 Seamless Precision Steel Tubes]]></title><link><![CDATA[https://fushunharrislee.en.ec21.com/ST35_Seamless_Precision_Steel_Tubes--11456488_11458394.html]]></link><description><![CDATA[BK1
BKW1
(BKS)
(GBK)1
(NBK)1
Grade
Tensile
Elongation
Tensile
Elongation
Tensile
Yield point
Elongation
Tensile
Elongation
Tensile
Yield point
Elongation
N/mm2
%
N/mm2
%
N/mm2
N/mm2
%
N/mm2
%
N/mm2
N]]></description><pubDate><![CDATA[20211013]]></pubDate></item>
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<title><![CDATA[Astm A519 SAE4130 Cold Drawn Seamless Tube]]></title><link><![CDATA[https://greatwallsteel9.en.ec21.com/Astm_A519_SAE4130_Cold_Drawn--11575970_11790867.html]]></link><description><![CDATA[Standard&amp;material: ASTM A519 SAE1020, SAE1035, SAE1045, SAE4130, SAE4140, etc.
Size range: 8mm*1mm - 480mm*40mm
Length Max: 15.2meters
Manufacture process: Cold-drawn
Delivery condition: BK, BKW, BKS]]></description><pubDate><![CDATA[20230516]]></pubDate></item>
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<title><![CDATA[Bk+S Ready To Honed Tube, Pneumatic / Hydraulic Cylinder Tube ST52]]></title><link><![CDATA[https://susanxudsteel.en.ec21.com/Bk_S_Ready_To_Honed--11665304_11666209.html]]></link><description><![CDATA[Bk+S Ready To Honed Tube, Pneumatic / Hydraulic Cylinder Tube ST52 Hydraulic and Pneumatic cylinders seamless steel pipe Cold Drawn Seamless Honed Tube for hydraulic cylinder Main standards: GB / t36]]></description><pubDate><![CDATA[20221031]]></pubDate></item>
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<title><![CDATA[ASTM A179/ASTM179M-90A(2005) Standard Specification for Seamless Cold-drawn Low- Carbon Steel Heat-]]></title><link><![CDATA[https://tefu888.en.ec21.com/ASTM_A179_ASTM179M_90A_2005--11750485_11752145.html]]></link><description><![CDATA[BK/+C,GBK/+A,BKW/+LC,BKS/+SR
Surface
Mill(Gray with White)/Black Phosphated/Galvanized
Application
FOR Hydraulic &amp; Pneumatic power systems
Marking
Standard marking,or according to your request.
End T]]></description><pubDate><![CDATA[20230320]]></pubDate></item>
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<title><![CDATA[Astm Asme SA213 T5 T11 T12 T22]]></title><link><![CDATA[https://tubetrade.en.ec21.com/Astm_Asme_SA213_T5_T11--2454234_3336656.html]]></link><description><![CDATA[BK, BKS, GBK, NBK,Stress Relief, Normalizing, Spheroidize Anneal, Annealing, Bright Annealing, Normalized, Quenched and Tempered, Solution Annealing, etc ;
4) Continuous stenciling as required ;
5) R]]></description><pubDate><![CDATA[20180418]]></pubDate></item>
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<title><![CDATA[Honed Cylinder Tubes SAE 1020 or ST52.3, Tolerance H8 or H9]]></title><link><![CDATA[https://honedtubing.en.ec21.com/Honed_Cylinder_Tubes_SAE_1020--11537181_11537189.html]]></link><description><![CDATA[BK, BK+S, GBK, NBK
Length: max 16m
Straightness: ≤ 0.5/1000
Roughness: 0.2-0.4 μm 
Tolerance of outer diameter: DIN2391, EN10305, GB/T 1619
Internal diameter tolerance: H8, H9
Packing method: Anti]]></description><pubDate><![CDATA[20221015]]></pubDate></item>
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<title><![CDATA[API 5L GR.B JIS 3445 S20C Carbon Round Seamless Pipe]]></title><link><![CDATA[https://hehe1029.en.ec21.com/API_5L_GR.B_JIS_3445--5455680_5511846.html]]></link><description><![CDATA[BK BKW BKS GBK NBK
7.MOQ:5metric ton
8.Packing:bundles with steel strip, wooden case
9.Shipment ways:20&apos;container:22metric ton
40&apos;container:26metric ton
Packaging &amp; Shipping
bundles with steel strip ]]></description><pubDate><![CDATA[20190506]]></pubDate></item>

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