High Quality H8 H9 H10 St52 Honed Tube for Hydraulic Cylinder

• After-sales Service: 12 Years
• Warranty: 12 Years
• Type: Seamless
• Technique: Cold Drawn
• Material: Carbon Steel
• Surface Treatment: Oiled
• Model NO.: BKS-52
• Usage: Hydraulic/Automobile Pipe, Food/Beverage/Dairy Products, Machinery Industry, Mining, Construction & Decoration, Special Purpose
• Section Shape: Round
• Surface: Black Varnished/3PE/3lpe/Galvanized
• Pipe Ends: Plain or Bevel Ends
• Coupling: with Coupling or Socket
• Length: 1m~12m
• Production Standard: DIN2391 En 10305-1:2016; En 10204:2004
• Material Grade: C20/C45/S355/E355/S235/St37/St52/St44
• Product Name: Cold Drawn Seamless Honed Precision Tube
• Package: Plywood Boxes
• ID Tolerance: 0.1mm Max
• Straightness: 1/1000
• ID Roughness: Ra 0.4micron(Max)
• Tolerance: H7 H8 H9 H10
• Delivery Condition: Bk, Bks, Nbk
• Inspection: Inner Surface NDT(Nondestructive Testing)
• Transport Package: Wrapped by Plastic Bags Andsteel Strips in Bundles
• Specification: OD: 16~400mm; THK: 3~40mm
• Trademark: Boerking
• Origin: Tianjin, China
• HS Code: 73041930
• Production Capacity: 10000ton/Year

Product Description

DIN2391 St52 H8 Honed Tube for Hydraulic Cylinder

 

1. Description: Honing is a kind of machining technology. Through honing head, the inner hole of cold drawn pipe is processed by reciprocating high-speed grinding technology, so that the inner hole can meet the requirements of tolerance size and surface roughness that we need.
Honed tube is a kind of smooth bore steel tube used to manufacture hydraulic cylinder barrels that is the core part of a piece of hydraulic cylinder. 
2. Commodity: 42CrMo4 Precision Cold Drawn Honed Pipe
3. Size range: Inside diameter: 25mm -500mm; Wall thickness: 2-50mm
4. Available steel grade: 

SAE/AISI:	SAE1020, SAE1026, SAE1045, SAE4130, SAE4140
DIN:	ST52, ST52.3, ST52.4
EN:	E355, C45E, 25CrMo4, 42CrMo4, CK45, S45C, E410, E470
GB:	20#, 45#, 16Mn, Q345B, Q345C, Q345D, Q345E, 25Mn, 27SiMn,

5. Manufacture method: Cold rolled, hydraulic cold drawn, hot rolled+deep hole boring
6. Delivery condition: 

BK	BKW	BKS	GBK	NBK	Q+T
+C	+LC	+SR	+A	+N
Cold rolled	Cold drawn	Stress relieved	Annealed	Normalized	Quenched+Tempered

7. Bore treatment: Honing, skiving&roller burnishing
8. Bore roughness control: Ra0.25um max or Ra0, 35um max for honed tubes, Ra0.25um max for skived&roller burnished tubes. 
9. End finish: Plain ends with square cuts, free of burrs for honed tubes. Little bevelled ends for skived&roller burnished tubes. 
10. Standard export packing: In bundles tied with steel strips. Internal & external oil coating. Plastic caps on both ends. External packing by PVC bags and knit bags. 
11. Customized packing and marking can be provided upon request. 
12. H8 tolerance: 

ID range	Tolerance	ID range	Tolerance
18< d ≤30	+0/+0.033	180< d ≤250	+0/+0.072
30< d ≤50	+0/+0.039	250< d ≤300	+0/+0.081
50< d ≤80	+0/+0.046	300< d ≤315	+0/+0.081
80< d ≤120	+0/+0.054	315< d ≤400	+0/+0.089
120< d ≤180	+0/+0.063	400< d ≤500	+0/+0.097

 

13. Difference between honed tube and skived&roller burnished tube: In hydraulic cylinder industry, there are 2 solutions for bore treatment: Honing, and skiving&roller burnishing. Honing or skiving&roller burnishing leads to different internal surface image, but both ensure good roughness. 

Standard Size:
I.D(mm)	O.D(mm)	WT(mm)	I.D(mm)	O.D(mm)	WT(mm)	I.D(mm)	O.D(mm)	WT(mm)
40	50	5	90	100	5	140	156	8
40	52	6	90	105	7.5	140	160	10
40	55	7.5	90	110	10	140	165	12.5
40	58	9	90	114	12	140	168	14
50	60	5	95	105	5	140	170	10
50	65	7.5	95	110	7.5	140	180	20
50	70	10	100	110	5	150	170	10
60	70	5	100	115	7.5	150	175	12.5
60	72	6	100	120	10	150	180	15
60	75	7.5	100	125	12.5	160	180	10
60	80	10	100	127	13.5	160	185	12.5
63	73	5	100	130	15	160	190	10
63	75	6	110	125	7.5	160	200	20
63	76	6.5	110	130	10	170	190	10
63	78	7.5	110	140	15	170	195	12.5
63	80	8.5	115	130	7.5	170	200	15
63	83	10	115	135	10	180	200	10
70	80	5	120	135	7.5	180	205	12.5
70	82	6	120	140	10	180	210	15
70	85	7.5	120	145	12.5	180	220	20
70	90	10	120	150	15	200	220	10
75	85	5	125	140	7.5	200	225	12.5
75	90	7.5	125	145	12.5	200	230	15
75	95	10	125	150	12.5	200	235	17.5
80	90	5	125	152	13.5	200	245	22.5
80	92	6	125	155	15	220	250	15
80	95	7.5	125	160	17.5	220	270	25
80	100	10	130	145	7.5	220	273	26.5
80	102	11	130	150	10	240	270	15
80	105	12.5	130	160	15	250	290	20
80	110	15	135	160	12.5	250	299	24.5
Special requirement						230.5	254	11.75

Mechanical Property:
Delivery  condition		cold finished(hard)(BK)				Cold drawn and stress-relieved(BK+S)
Steel grade		Rm MPa			Elongation A5(%)	Rm MPa	ReH MPa	Elonggation A5(%)
20#		≥550			≥8	≥520	≥375	≥15
16Mn		≥640			≥5	≥600	≥520	≥14
ST52(E355)		≥640			≥5	≥600	≥520	≥14
SAE1026		≥640			≥5	≥600	≥510	≥12
45#		≥650			≥5	≥600	≥510	≥12

Chemical Composition:
Steel grade		Chemical composition,%
		C		Si	Mn	P	S	Cr
						≤
20#		0.17-0.24		0.17-0.37	0.35-0.65	0.035	0.035	0.25
16Mn		≤0.2		≤0.5	1.00-1.60	0.03	0/03	0.25
ST52(E355)		≤0.22		≤0.55	≤1.6	0.025	0.025	0.25
SAE1026(25Mn)		0.22-0.28		0.15-0.35	0.6-0.9	0.04	0.05	/
45#		0.42-0.5		0.17-0.37	0.5-0.8	0.025	0.02	0.25

 

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Company information 

     Tianjin Boer King Steel is a  professional  trading company and has been in steel industry for more than 15years, specializing in seamless steel pipe,oil casing/drill pipe, galvanized steel pipe, stainless steel pipe,ERW/SSAW/LSAW/ welded pipe.

      Also we sale hot and cold rolled steel coils,steel plates,galvanized steel coils, all kinds of profiles like H-beam, Angel bar,C profile etc.

      We have established long term cooperations with several famous steel manufactures all over the world, and we can offer you best quality products with competitive price which will give you an edge over your competitors.

      Besides, we offer best service all the time.We will do our best to satisfy you needs for the products. Our products have been sold in many countries and areas of the world including South America, Iran, Kenya, Israel etc, and our export volume reaches 160,000tons per year.
 
      We execute quality gurantee system ISO 9001,2008 strictly and all certicates and the third party inspection like MTC,API,ABS,ISO9001,SGS BV etc. will be provided as client's requirements.



FAQ

Q1:How about the quality?
A:Third party inspections are always welcomed, like TUV, BV, SGS.   All of the goods will be released together with MTC and stamped by TPI. 

Q2: Can you accept customization?
A: Yes.we can do customization for you.

Q3: Do you provide samples? Free or not?
A: Yes, we could offer the sample for free but do not pay the cost of freight.

Q4: How long is the delivery time?
A: Generally about 5-10 days if the goods in stock. Or will be 15-30 days if not in stock.

Q5: How about the trade terms?
A: EXW, FOB, CFR, CIF, LC will be accepted.

Contact: Cindy Yang ([phone])
TIANJIN BOER KING STEEL PIPE CO.,LTD
Add: No.602,Shuanggang Development Zone,Tianjin,300350 China.
Web: http://boerkingsteel.en.made-in-china.com