Hydraulic Cylinder pipe

The honed cylinder tube suitable for various kinds of Precision Mechanical Tubes, Hydraulic Cylinder Tube and Pneumatic Cylinder Tubes, Stainless Steel Cylinder Tubing, Construct use Multi Joint Tube, Steel Axis Pipe, Injection Machine and Robotic Arm.

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Hydraulic Cylinder Tube

1. Description: 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: Hydraulic cylinder tube

3. Size range: 40mm*30mm-580mm*500mm

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	Q+T
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. Int&ext oil coating. End plastic caps. 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.

INTERNAL SURFACE CONDITION OF HONED TUBES:

INTERNAL SURFACE CONDITION OF SKIVED&ROLLER BURNISHED TUBES:

PART II: FREQUENTLY ASKED QUESTIONS
1. MOQ: Generally Min Order Quantity can be 5-10 tons/size for tubes with OD below 250mm, and 15 tons/size for tubes with OD above 250mm. Sometimes, it depends on steel grade you need. If you need special grade like E410, E470 or alloy steel tube, MOQ should be 20 tons/size at least.
2. Delivery Time: Generally, our delivery time for honed tubes is around 40-60 days depending on the sizes and quantities. It will take us 15-30 days to get raw material. For example, if you need 3 tons of small size honed tubes 50mm*40mm with roughness of Ra0.25um max, it will take us at least 30 days to hone this size.
3. Warranty&Guarantee: Warranty&guarantee period is 6 months since we deliver the tubes, and we are not responsible for quality problem caused by wrong unloading or storage after shipment. We welcome customer's inspection before shipment.
4. Payment Method: We accept payment method like T/T, L/C, or D/P, but it depends on our investigation about customers. We have a solution to evaluate the credit of customers from all over the world, and time and amount of D/P we can release is determined by the evaluation.
5. Quality Control: 90% of the tubes are made from hot rolled seamless pipes. So, quality of raw material determined quality of finished tubes. We purchase raw material from stable suppliers who are leading steel mills, and we inspect the raw material as per the specifications. During our production procedure, there is inspection and quality control in every stage

Standard	ASTM
Material	A335 P1-P91
Outside Diameter	60.3mm-813mm
Outside Diameter	2"-32"
Thickness	5mm-100mm
Thickness	XS-
Length	6M 12M or Random
Surface Treatment	bare, brightness, Varnish, coating
Package	Bundle or loose
	Wood box
	Marking: acording to customer's requirement.

Chemical Composition

Chemical Composition
Chemical Composition
Steel Grade	C	Mn	P	S	Si	Cr	Mo	V	Nb	B	N	Al	W	Ni
P1	0.05-0.15	0.30-0.60	0.025	0.025	0.50-1.00	1.00-1.50	0.44-0.65	\	\	\	\	\	\	\
P2	0.015	0.30-0.60	0.025	0.025	0.5	4.00-6.00	0.45-0.65	\	\	\	\	\	\	\
P5	0.015	0.30-0.60	0.025	0.025	0.5	4.00-6.00	0.45-0.65	\	\	\	\	\	\	\
P9	0.015	0.30-0.60	0.025	0.025	0.5	4.00-6.00	0.45-0.65	\	\	\	\	\	\	\
P11	0.015	0.30-0.60	0.025	0.025	0.5	4.00-6.00	0.45-0.65	\	\	\	\	\	\	\
P12	0.015	0.30-0.61	0.025	0.025	0.5	0.80-1.25	0.45-0.65	\	\	\	\	\	\	\
P22	0.015	0.30-0.61	0.025	0.025	0.5	1.90-2.60	0.87-1.13	\	\	\	\	\	\	\
P23	0.04-0.10	0.1-0.6	0.03	0.01	0.5	1.9-2.6	0.05-0.30	0.20-0.30	0.02-0.08	0.0005-0.006	0.03	0.03	1.47-1.75
P91	0.08-0.12	0.3-0.6	0.02	0.01	0.2-0.5	8.0-9.5	0.85-1.05	0.18-0.25	\	\	0.03-0.07	0.04	0.06-0.10	0.4