En10305 E355 Cold Drawn Seamless Skived Roller Burnished/Srb Tube for Hydraulic Cylinder

• After-sales Service: Support
• Warranty: Support
• Type: Seamless
• Technique: Hot Rolled
• Material: Carbon Steel
• Surface Treatment: Black
• Usage: Pipeline Transport, Boiler Pipe, Hydraulic/Automobile Pipe, Oil/Gas Drilling, Machinery Industry, Construction & Decoration, Special Purpose
• Section Shape: Round
• Application: Fluid Pipe, Boiler Pipe
• Length: 5.8m, 6.4m, 6m, 11.8m, 12m, or as Required
• Thickness: 1-120 mm
• Delivery Time: 8-14 Days
• Processing Service: Bending, Welding, Decoiling, Punching, Cutting
• Transport Package: Standard Seaworthy Packing
• Trademark: YF STEEL
• Origin: Tianjin, China
• Production Capacity: 10000 Tons Per Month

Product Description

Product Introduction

Honed Tube

Honed tube is ready to use for hydraulic cylinder applications without further ID processing.

The honing process involves using abrasive polishing stones and abrasive paper to remove small amounts of material, to produce extremely precise ID dimensions and improved finishes. Honed tubing is ready to use for hydraulic cylinder applications without further ID processing.

Hydraulic steel tube

Hydraulic steel tube is designed to convey liquid fluids to among hydraulics components, fittings, valves, flanges, and other tools. It is made of material E355 (ST 52.4) or E235 (ST 37.4). These two grades have different chemical composition. This helps to control the working pressure.

Chemical Composition (%)	Carbon (C)	Silicon (Si)	Manganese (Mn)	Phosphorus (P)	Sulfur (S)
E355 (ST52.4)	⩽ 0.22	⩽ 0.55	⩽ 1.6	⩽ 0.045	⩽ 0.045
E235 (ST37.4)	⩽ 0.17	⩽ 0.35	⩽ 1.2	⩽ 0.045	⩽ 0.045

Hydraulic tube is made according to DIN 2391/C (DIN EN 10305-1) or DIN 2445/2 (DIN EN 10305-4) standards and it is available in millimeters, inches outer diameter, and inches nominal bore size.

 

How to make hydraulic tube

The tubes surface finishing is NBK, where the tubes are phosphate and normalized which provides corrosion resistance. It is oiled inside and outside. Normalize process creates tougher metal product. During normalizing, metals will be heated at a high temperature, and it allowed to naturally cool back down to room temperature by exposure after heating. Metals that have been through this process are more formable, harder and ductile.

Quality Standards

Seamless Honed Tubes (Steel) with a micro-finish and highly accurate in bore size within tolerance H7 or equivalent.

• DIN 2391 Seamless Precison Steel Tubes
• EN10305 Steel Tubes for Precision Applications Seamless Cold Drawn Tubes
• ASTM A519 Standard Specification for Seamless Carbon and Alloy Steel Mechanical Tubing
• JIS G3445 Carbon Steel Tubes for Machine Structural Purposes

Grade: ST 52, ST52.3, CK45, E355, 16Mn, STKM13C, SAE1020, SAE1026, SAE1045

Size range

Honed Tubes are ready to use for hydraulic cylinder applications without further ID processing.

• Inside diameter from 40 to 1000mm, Max length 20 meters.
• Straightness: 0.5 /1000
• Tolerance EXT: DIN 2391
• Tolerance INT: ISO H8
• Roughness(Ra): 0.2 to 0.4µ

Type

• cold drawing
• normalizing treatment
• honing.

Tolerance standard

Different sizes of ready to use honed tube are available.

ID(mm)	TOLERANCE(mm)
	H7	H8	H9	H10
<=30	+0.021/0	+0.033/0	+0.052/0	+0.084/0
30 - <=50	+0.025/0	+0.039/0	+0.062/0	+0.100/0
50 - <=80	+0.030/0	+0.046/0	+0.074/0	+0.120/0
80 - <=120	+0.035/0	+0.054/0	+0.087/0	+0.140/0
120 - <=180	+0.040/0	+0.063/0	+0.100/0	+0.160/0
180 - <=250	+0.046/0	+0.072/0	+0.115/0	+0.185/0
250 - <=315	+0.052/0	+0.081/0	+0.130/0	+0.210/0
315 - <=700	+0.057/0	+0.089/0	+0.140/0	+0.230/0

This will provide long piston seal life and prevent failure of the cylinder. The tube material is selected on the basis of application & working pressure.

The seamless tube for hydraulic cylinders, obtained from high quality cold drawn tubes, available in a wide dimensional range.

• Length: unfixed length or fixed length
• Package: banding with steel strips, braiding parcel at outside
• Conservation: Anti rust oiled coating on the inside and outside of the surface, plastic caps at both ends.

Carbon steel Hydraulic Cylinder Tubing is available with grades as below:

• SAE 1020
• SAE 1026
• SAE1030/1035
• E355, E255, E215, E235
• ST52.3,  St35, ST 52.4, St 37.4

Advantages of Honed tube

• High precision tolerances;
  Our honed tube can meet ID tolerance H7, H8, H9, … etc according to the customer' requirements, and its I.D dimension.
• Seamless tube with high pressure resistance;
  We only use seamless cold drawn tubes to produce honed pipes, which means our honed tubing can work under higher pressure, thus our honed pipes are more reliable for hydraulic cylinder applications.
• High Smooth inside surface;
  The roughness of our honed pipe is Max Ra 0.4 microns ID finish (16Max Ra ID Finish).
• Flexible order quantity: we accept small quantity orders, even if there is only one piece of hydraulic cylinder tubing we can produce and supply.
• Good weldability: The weldability of our honed steel tubing is very good, this is quite helpful for manufacturing the cylinders.

Main products and application

Steel Grade	Standard				Application
	GB(China)	ASME(USA)	DIN/EN(Euro)	JIS(Jpan)
Carbon steel	10 20 20G 20MnG 25MnG Q345B/C/D/E	A106 SA-106B SA-106C SA-192 SA-210A1 SA-210C	St35.8 St45.8 P235GH P265GH	STB340 STB410 STB510	Economizer tube Water wall tube, pipeline, header pipe, Petrochemical furnace tube, heat exchange tube
Mo steel	15MoG 20MoG	SA-209 T1 SA-209 T1a SA-209 T1b	16Mo3	15Mo3 16Mo3	Water wall tube Superheater tube Reheater tube
Cr-Mo Steel Cr-Mo-V steel	12Cr1MoG 12Cr2MoWVTiB		12Cr1MoV 14MoV63		Superheater tube Reheater tube, Pipeline, Header pipe, Petrochemical furnace tube, Heat exchange tube
Cr-Mo-Steel Cr-Mo-W Steel Cr-Mo Steel Cr-Mo-W steel	12CrMoG 15CrMoG 12Cr2MoG 10Cr9Mo1VNbN 10Cr9MoW2VNbBN 12Cr1Mo 12Cr5Mol/NT 12Cr9Mol/NT	T11/P11 T12/P12 T22/P22 T23/P23 T24/P24 T5/P5 T9/P9 T91/P91 T92/P92	10CrMo5-5 12CrMo4-5 10CrMo9-10 7CrWVMoNb9-6 7CrMoVTIB10-10 X10CrMoVNb9-1 X10CrWMoVNb9-2 X11CrMo5+l/NT X11CrMo9-1+l/NT	STB20 STB22 STB23 STB24 STB25 STB26	Superheater tube, Reheater tube, Main steam pipe, Pipleline, Header pip, Petrochemical furnace tube, Heat exchange tube
Carbon steel Ni steel	16MnDG 10MnDG 09DG	A333-1 SA-333-1 A333-6 SA-333-6 A333-3 SA-333-3		STPL380 STPL450	Tube & pipe for Low-temperature service
Austentic Stainless steel	---	AP304  TP304H TP321 TP321H TP347 TP347H TP316 TP316H S30432 TP310HCbN		---	Superheater tube Reheater tube

Dimension tolerances of seamless steel pipe

Pipe types	Pipe Szie(mm)		Tolerances
Hot rolled	OD	<50	±0.50mm
		≥50	±1%
	WT	<4	±12.5%
		≥4-20	+15%, -12.5%
		>20	±12.5%
Cold drawn	OD	6-10	±0.20mm
		10-30	±0.40mm
		30-50	±0.45
		>50	±1%
	WT	<1	±0.15mm
		>1-3	+ 15%, - 10%
		>3	+ 12.5%, - 10%

Tolerances on out diameter

For pipe over 10 inches as a special OD tolerance pipe, the OD shall within vary +1% /-1%.

Standard	Hot finished seamless tube		Cold flnished seamless tube
	Out diameter (mm)	Tolerance	Out diameter (mm)	Tolerance
EN10216-1 EN10216-2 DIN17175	≤100	+/-0.75% (min.+/-0.5mm)	All	+/-0.5% (min. +/-0.30mm)
	>100	+/-0.90%
GB/T 3087	≤460	+/-0.75% (min.+/-0.5mm)	10-30	+/-0.40mm
			>30-50	+/-0.45mm
			>50	+/-1.0%
GB/T 5310 GB/T 9948 GB/T 6479	<57	+/-0.40mm	≤30	+/-0.20mm
	57-325	+/-0.75%	>30-50	+/-0.30mm
	>325-460	+1%,-2mm	>50	+/-0.8%
ASME SA-179M ASME SA-192M ASME SA-209M ASME SA-210M ASME SA-213M JIS G 3461 JIS G 3461	≤101.6	+0.4, -0.8mm	<25.4	+/-0.10mm
			>25.4-38.1	+/-0.15mm
			>38.1-50.8	+/-0.20mm
	101.6-190.5	+0.4, -1.2mm	>50.8-63.5	+/-0.25mm
			>63.5-76.2	+/-0.30mm
			>76.2	+/-0.38mm
ASME SA106 ASME SA335	≤48.3	+/-0.40mm	≤48.3	+/-0.40mm
	48.3-114.3	+/-0.79mm
	114.4-219.1	+1.59, -0.79mm
	219.2-323.9	+2.38, -0.79mm	>48.3	+/-0.79mm
	>324	+/-1.0%

Tolerance on dimension

For standard pipe, except as provided for thin-wall pipe, the tolerances of diameter shall be in accordance with the following table:

Standard	Hot finished seamless tube		Cold flnished seamless tube
	Out diameter (mm)	Tolerance	Out diameter (mm)	Tolerance
EN10216-1 EN10216-2 DIN17175	≤100	+/-0.75% (min.+/-0.5mm)	All	+/-0.5% (min. +/-0.30mm)
	>100	+/-0.90%
GB/T 3087	≤460	+/-0.75% (min.+/-0.5mm)	10-30	+/-0.40mm
			>30-50	+/-0.45mm
			>50	+/-1.0%
GB/T 5310 GB/T 9948 GB/T 6479	<57	+/-0.40mm	≤30	+/-0.20mm
	57-325	+/-0.75%	>30-50	+/-0.30mm
	>325-460	+1%,-2mm	>50	+/-0.8%
ASME SA-179M ASME SA-192M ASME SA-209M ASME SA-210M ASME SA-213M JIS G 3461 JIS G 3461	≤101.6	+0.4, -0.8mm	<25.4	+/-0.10mm
			>25.4-38.1	+/-0.15mm
			>38.1-50.8	+/-0.20mm
	101.6-190.5	+0.4, -1.2mm	>50.8-63.5	+/-0.25mm
			>63.5-76.2	+/-0.30mm
			>76.2	+/-0.38mm
ASME SA106 ASME SA335	≤48.3	+/-0.40mm	≤48.3	+/-0.40mm
	48.3-114.3	+/-0.79mm
	114.4-219.1	+1.59, -0.79mm
	219.2-323.9	+2.38, -0.79mm	>48.3	+/-0.79mm
	>324	+/-1.0%

Tolerances on wall thickness

The wall thickness at any point shall be within the below tolerance table.

Standard	Hot finished seamless tube			Cold flnished seamless tube
	Out diameter OD(mm)	Wall thickness T(mm)	Tolerance	Out diameter (mm)	Wall Thickness T(mm)	Tolerance
DIN17175	≤130	S≤2Sn	+15%, -10%	--	All	+/-10% (min. +/-0.2mm)
		2Sn<S≤4Sn	+12.5%, -10%
		S>4Sn	+-/9%
	>130	S≤0.05da	+17.5%, -12.5%
		0.05da<S≤0.11da	+/-12.5%
		S>0.11da	+/-10%
EN 10216-1 EN 10216-2	≤219.1	-	+/-12.5% (min.+/-0.4mm)
	--	T/D≤0.025	+/-20%
		0.025<T/D≤0.050	+/-15%
		0.05<T/D≤0.10	+/-12.5%
		0.1<T/D	+/-10%
GB/T 3087	--	≤20	+15%,-12.5% (min.+0.45, -0.35mm)	--	1.0-3.0	+15%, -10%
		>20	+/-12.5%	--	>3	+12.5%, -10%
GB/T 5310 GB/T 9948 GB/T 6479	--	<4.0	+15%,-10% (min.+0.48, -0.32mm)	--	2-3	+12%,-10%
		4-20	+12.5%,-10%		>3	+/-10%
		>20	+/-10%
ASME SA-179M ASME SA-192M ASME SA-209M ASME SA-210M ASME SA-231M JIS G 3461 JIS G 3462	--	2.41-3.8	+35%, -0%	≤38.1	--	+20%,-0%
		3.8-4.6	+33%,-0%	>38.1	--	22%,-0%
		>4.6	+28%,-0%	--	--	--
ASME SA-106 ASME SA-335	--	All	+/12.5%		All	+/-10%

Pipes, Tubes and Hollow Sections

Norms

• API 5L - Line Pipe
• ASTM A 53 - Black and Hot-Dipped, Zinc-Coated, Welded and Seamless, Steel Pipe
• ASTM A 106 - Seamless Carbon Steel Pipe for High-Temperature Service
• ASTM A 213 - Seamless Ferritic and Austenitic Alloy-Steel Boiler, Superheater, and Heat-Exchanger Tubes
• ASTM A 269 - Seamless and Welded Austenitic Stainless Steel Tubing for General Service
• ASTM A 312 - Seamless, Welded, and Heavily Cold Worked Austenitic Stainless Steel Pipes
• ASTM A 333 - Seamless and Welded Steel Pipe for Low-Temperature Service
• ASTM A 335 - Seamless Ferritic Alloy-Steel Pipe for High-Temperature Service
• ASTM A 358 - Electric-Fusion-Welded Austenitic Chromium-Nickel Stainless Steel Pipe for High-Temperature Service and General Applications
• ASTM A 671 - Electric-Fusion-Welded Steel Pipe for Atmospheric and Lower Temperatures
• ASTM A 672 - Electric-Fusion-Welded Steel Pipe for High-Pressure Service at Moderate Temperatures
• ASTM A 790 - Seamless and Welded Ferritic/Austenitic Stainless Steel Pipe
• ASTM A 928 - Ferritic/Austenitic (Duplex) Stainless Steel Pipe Electric Fusion Welded with Addition of Filler Metal
• EN 10208-2 - Steel pipes for pipelines for combustible fluids - Part 2: Pipes of requirement class B
• EN 10210-1/2 - Hot finished structural hollow sections of non-alloy and fine grain steels
• EN 10216-1 - Seamless steel tubes for pressure purposes - Part 1: Non-alloy steel tubes with specified room temperature properties
• EN 10216-2 - Seamless steel tubes for pressure purposes - Part 2: Non-alloy and alloy steel tubes with specified elevated temperature properties
• EN 10217-1 - Welded steel tubes for pressure purposes - Part 1: Non-alloy steel tubes with specified room temperature properties
• EN 10217-2 - Welded steel tubes for pressure purposes - Part 2: Electric welded non-alloy and alloy steel tubes with specified elevated temperature properties
• EN 10219-1/2 - Cold formed welded structural hollow sections of non-alloy and fine grain steels
• EN 10297-1 - Seamless circular steel tubes for mechanical and general engineering purposes - Part 1 Non-alloy and alloy steel tubes

Grade

• API 5L Gr. A, B, X42, X52, X60, X65, X70
• ASTM A 53 Gr. A, Gr. B
• ASTM A106 Gr. A, B, C
• ASTM A 213 TP 304, 304L, 304H, 316, 316L, 316H, 321, 321H, T5, T9, T11
• ASTM A 269 TP 304, 304L, 304H, 316, 316L, 316H, 321, 321H
• ASTM A 312 TP 304, 304L, 304H, 316, 316L, 316H, 321, 321H
• ASTM A 333 Gr. 3, Gr. 6 ASTM A 335 P1, P2, P5, P9, P11, P12, P22, P91, P92
• ASTM A 358 TP 304, 304L, 304H, 316, 316L, 316H, 321, 321H
• ASTM A 671 CC 60, CC 65, CC 70
• ASTM A 672 CC 60, CC 65, CC 70
• ASTM 790 UNS S31803, UNS S32205, UNS S32750, UNS S32760
• ASTM A928
• EN 10208-2 L245, L 290, L360
• EN 10210-1 S235 JRH, S275 JOH, S275 J2H, S355 JOH, S355 J2H
• EN 10216-1 P235 TR1/2
• EN 10216-2 P235 GH, P265 GH
• EN 10217-1 P235 TR1/2, P275 TR1/2
• EN 10217-2 P235 GH, P265 GH
• EN 10219-1 S235 JRH, S275 JOH, S275 J2H, S355 JOH, S355 J2H
• EN 10297-1 E235, E275, E315, E355, E470

Delivery

Steel pipe delivery status(condition)

Steel pipe delivery status(condition): cold / hard (BK), cold / soft (BKW),after cold stress relief annealing (BKS), annealing (GBK), normalized (NBK).

Condition on delivery of steel pipe

Term	Symbol	Explanation
Cold-finished/hard (cold-finished as-drawn)	BK	No heat treatment after the last cold-forming process. The tubes therefore have only low deformability.
Cold-finished/soft (lightly cold-worked)	BKW	After the last heat treatment there is a light finishing pass (cold drawing) With proper subsequent processing, the tube can be cold-formed (e.g. bent, expanded) within certain limits.
Annealed	GBK	After the final cold-forming process the tubes are annealed in a controlled atmosphere or under vacuum.
Normalized	NBK	The tubes are annealed above the upper transformation point in a controlled atmosphere or under vacuum.

The general cold strip mills, volume should go through continuous annealing (CAPL unit) to eliminate cold hardening and rolling stress, or batch annealing reach the mechanical properties of the corresponding standard specifies. Cold rolled steel surface quality, appearance, dimensional accuracy better than hot-rolled plate, and right-rolled thin product thickness is about 0.18mm, so the majority of users favor.

Cold rolled steel coil substrate products deep processing of high value-added products. Such as electro-galvanized, hot dip galvanized, electro-galvanized fingerprint resistant, painted steel roll damping composite steel, PVC laminating steel plates, etc., so that the excellent quality of these products has a beautiful, high resistance to corrosion, has been widely used.

Cold rolled steel coil finishing after annealing, cut the head, tail, trimming, flattening, smooth, heavy volume, or longitudinal clipboard. Cold-rolled products are widely used in automobile manufacturing, household electrical appliances, instruments, switches, buildings, office furniture and other industries. Steel plate strapping package weight of 3 to 5 tons. Flat sub-volume typically 3 to 10 tons / volume. Coil diameter 6m.

Packaging and Shipping

1) Packaging: 3 layers of packing. Inside is craft paper, Middle is water plastic film and outside GI steel sheet to be covered by steel strips with lock, with inner coil sleeve or as customers' requirements.
2) Shipping: We have long-term cooperation with many experienced shipping companies and will find the most suitable mode of transportation for you.
3) Trade terms: FOB/CIF/CFR
4) Shipping port: Qingdao/Tianjin/Shanghai
5) Shipment: A: Length: ≤6m, loaded in 20GP Container. B: Length: ≤12m, loaded in 40GP Container.
Remark: Size of 20GP Container (inside :5898*2352*2393mm); Size of 40GP Container (inside:12032*2352*2393mm); Size of 40HQ Container (inside:12032*2352*2698mm).
6) Delivery time: Normal size: 7-15days send from warehouse directly. Special size:15-30days custom made for you.

FAQ

Q1:Can you send samples?
A:Of course, we can provide customers with free samples and express shipping service to all over of the world.
Q2:What product information do I need to provide?
A:Please kindly provide the grade, width, thickness, surface treatment requirement should you have and quantities you need to purchase.
Q3:It's my first time to import steel products, can you help me with it?
A:Sure,we have agent to arrange the shipment, we will do it together with you.
Q4:What ports of shipment are there?
A:Under normal circumstances, we ship from Shanghai, Tianjin, Qingdao, Ningbo ports, you can specify other ports according to your needs.
Q5:What about product prices information?
A:Prices various according to periodic price changes of raw materials.
Q6:What is your terms of payment ?
A:Payment<=1000USD, 100% in advance. Payment>=1000USD, 30% T/T in advance ,balance before shipment or based on BL copy or LC at sight.
Q7:Do you provide custom made Products service?
A: Yes,if you have your own design , we can produce according to your specification and drawing.
Q8:What are the certifications for your products?
A:We have ISO 9001, MTC, third parties' inspections are all available such SGS, BV ect.
Q9:How long does your delivery time take?
A:In general, our delivery time is within 7-15 days, and may be longer if the quantity is extremely large or special circumstances occur.
Q10: How many countries you already exported to?
A:We have exported to America, Canada, Brazil, Chile, Colombia, Russia, Ukraine, Thailand, Myanmar, Vietnam, India, Kenya, Ghana,somalia and other African countries.Our export experience is rich, we familiar with different market demands, can help customers avoid a lot of trouble.
Q11:Can I go to your factory to visit?
A:Of course, we welcome customers from all over the world to visit our factory.
Q12:Does the product have quality inspection before loading?
A:Of course, all our products are strictly tested for quality before packaging, and unqualified products will be destroyed and customers can appoint third parties to inspect the products before loading too.
Q13:How to pack the products?
A: Standard export sea-worthy packaging, the inner layer has a waterproof paper outer layer with iron packaging and is fixed with a fumigation wooden pallet. It can effectively protect products from corrosion and various climate changes during ocean transportation.
Q14:What is your working time?
A:In general, our online service time is Beijing time: 8:00-22:00, after 22:00, we will reply to your inquiry in the coming working day.