Product Details

Burnished seamless steel tube for hydraulic cylinder is a kind of seamless tube with smooth bore through skiving and roller burnishing. It is used to produce hydraulic cylinder barrels.

The material of burnished seamless steel tube can be carbon steel like SAE1020,SAE1045,C45E, low alloy steel like ST52,E355, and alloy steel like 25CrMo4,34CrMo4,42CrMo4,SAe4130,SAE4140,etc.

Product Description

Commodity: E355 skived and roller burnished seamless tube

Standard specification&material: EN10305-1 E355

Size range:73mm*63mm - 325mm*300mm

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): 0.25um 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.

Our Services

External machining or external polishing service can be provided.

Wooden box packing is available.

Mechnical stamp on each piece of tube can be provided.

Company Information

Every year, we can manufacture 3000 tons of burnished seamless steel tubes through the 3 sets of skiving and roller burnished machines we have.

Before skiving and roller burnishing, we use hydraulic cold drawing bench to produce seamless tubes with ID tolerance suitable for skiving and roller burnishing.

We are ISO9001-2008 certified manufacturer of hydraulic cold drawn steel tubes, honed tubes, skived and roller burnished tubes,and hydraulic cylinder barrels.

FAQ

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

Shipment: effected by containers.

MOQ: 4 tons for each size.

Warranty: 1 years after receipt of tubes.

Trade term: FOB,CFR,CIF,DAP.

THird party inspection or customer's inspection is acceptable.