Product Details

Product Description

1. Commodity: ST52 Seamless honed hydraulic cylinder tube

2. Types: honed tubes, skived and roller burnished tubes

3. Manufacture method: Hydraulic cold drawn, Cold rolled

4. Internal surface treatment method: honing or skiving and roller burnishing.

5. Size range: 40mm*30mm - 325mm*300mm

6. Standard&material: EN10305-1 E355,C45E,25CrMo4,34CrMo4,42CrMo4,DIN2391-2 ST52,ST52.3,ST52.4,ASTM A519 SAE1020,SAE1045,SAE1026,SAE4130,SAE4140,etc.

7. Delivery condition: BK, BKW, BK+S, GBK, NBK.

8. OD tolerance: as per DIN2391-1, EN10305-1, ASTM A519 or as per customer's requirement.

9. ID tolerance:H7,H8,H9,H10 or given by customer.

10. Bore roughness: 0.35um max for honed tubes, 0.25um max for skived&roller burnished tubes.

11. Wall Thickness tolerance (eccentricity): +/-5%

12. Ovality of OD: 0.15mm max for tubes with OD below 150mm, 0.25mm max for tubes with OD above 150mm.

13. Straightness: 0.5mm/1000mm max for tubes below 3000mm, 0.8mm/1000mm max for tubes between 3000mm and 6000mm, 1.2mm/1000mm for tubes above 6000mm.

Tolerance of ID of skived&roller burnished tubes:

ID / MM	H7	H8	H9	H10
30<ID≤50	+0.025/-0	+0.039/-0	+0.062/-0	+0.100/-0
50<ID≤80	+0.030/-0	+0.046/-0	+0.074/-0	+0.120/-0
80<ID≤120	+0.035/-0	+0.054/-0	+0.087/-0	+0.140/-0
120<ID≤180	+0.040/-0	+0.063/-0	+0.100/-0	+0.160/-0
180<ID≤250	+0.046/-0	+0.072/-0	+0.115/-0	+0.185/-0
250<ID≤315	+0.052/-0	+0.081/-0	+0.130/-0	+0.210/-0
315<ID≤400	+0.057/-0	+0.089/-0	+0.140/-0	+0.230/-0
400<ID≤500	+0.063/-0	+0.097/-0	+0.155/-0	-

Packaging & Shipping

Tubes will be packed in bundles tied with steel strips, internal and external oil coating for anti rust protection, end plastic caps will be added to both ends.

Shipment: we suggest shipment effected by 20GP or 40GP on FCL basis.

Company Information

We manufacture the following hydraulic cylinder tubes:

Cold rolled / hydraulic cold drawn seamless tubes ready to hone: 40mm*30mm-325mm*300mm

Honed seamless tubes: 40mm*30mm - 480mm*450mm

Skived and roller burnished tubes: 76mm*63mm - 300mm*280mm

FAQ

Payment method: 30% deposit,balance before shipment or against copy of B/L or L/C at sight.

MOQ: 4 tons for each size.

Warranty: 1 year after shipment of tubes.

Third party inspection or customer's inspection is acceptable.

Addtional inspections and tests are acceptable.