Product Details

Honed seamless tubing for hydraulic cylinder is a kind of smooth bore precision seamless steel tube used to produce hydraulic cylinder barrels. The main advantages are high purity of material and very smooth bore with roughness(Ra) below 0.4um.

Product Description

Commodity: Honed seamless tubing for hydraulic cylinder

Standard specification&material: EN10305-1 E355, C45E,25CrMo4,42CrMo4, DIN2391-2 ST52,ASTM A519 SAE1020,SAE1026,SAE1045,SAe4130,SAE4140,etc.

Size range:40mm*30mm - 480mm*450mm

Manufacture method: cold rolled, hydraulic cold drawn

Delivery condition:

BK	BKW	BKS	GBK	NBK
+C	+LC	+SR	+A	+N

Internal surface treatment method: honing or skiving and roller burnishing

OD tolerance: as per EN10305-1

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

W.T tolerance(eccentricity): +/-5%

Bore roughness(Ra): 0.4um max.

Chemical composition requirement of E355 material:

Element	C	Si	Mn	P	S
Content (%)	0.22% max	0.55% max	1.60% max	0.025% max	0.025% max

Mechanical properties of E355 tubes:

	BK	BKW	BKS	GBK	NBK
Tensile strength:	640 Mpa min	580 Mpa min	580 Mpa min	450 Mpa min	490Mpa-630Mpa
Yield strength	-	-	450 Mpa min	-	355 Mpa min
Elongation	4% min	7% min	10% min	22% min	22% min

Packaging & Shipping

Packing: tubes will be packed in bundles tied with steel strips. Slightly internal and external oil coating for anti-rust protection. End plastic caps. External packing by knit bags.

Marking on each piece of tube: to be confirmed.

Mechanical stamp on each piece of tube can be provided.

Shipping: by containers.

Our Services

External machining or external polishing service can be provided.

End machining service can be provided.

Company Information

We are ISO9001-2008 certified manufacturer of hydraulic cylinder tubes and hydraulic cylinder barrels.

Every year,we manufcture 12000 tons of honed seamless tubing for hydraulic cylinder application including cold drawn seamless tubes suitable for honing, honed tubes, and skived and roller burnished tubes.

We have systematc manufacturing facilites including cold rolling machines,hydraulic cold drawing bench,honing machines,skiving and roller burnishing machines,deep hole drilling machines,etc.

FAQ

Payment: 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 receipt of tubes.

Trade term: FOB,CFR,CIF,or DAP.

Third party inspection or customer's inspection is acceptable.