Product Details

Product Description

Commodity: SAE4140 burnished steel tube

Standard specification&material: DIN2391-2 ST52, EN10305-1 E355,25CrMo4,34CrMo4,42CrMo4,ASTM A519 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: skiving&roller burnishing

OD tolerance: as per EN10305-1

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

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

Bore roughness(Ra): 0.25um max.

Chemical composition:

Element

Content (%)

0.38-0.43

0.15-0.35

0.75-1.00

0.03

5 max

0.035 max

0.8-1.1

0.15-0.25

Mechanical properties:

	Hot rolled	Stress relieved	Annealed	Normaized
Tensile strength:	855 Mpa min	855 Mpa min	552 Mpa min	855 Mpa min
Yield strength:	621 Mpa min	689 Mpa min	414 Mpa min	621 Mpa min
Elongation:	15% min	10% min	25% min	20% min
Hardness:	HRB100 max	HRB100 max	HRB85 max	HRB100 max

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.

Our Services

Based on the manufacturing facilities, the following services are available:

1. Internal honing or skiving&roller burnishing

2. External surface polishing

3. External surface machining

4. Inernal threading

Company Information

We are ISO9001-2008 certified manufacturer of hydraulic cylinder tubes including cold drawn seamless precision steel tubes suitable for honing, honed tubes, skived and roller burnished tubes, as well as cylinder barrels.

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 years aftre receipt of tubes.

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

Third party inspection or customer's inspection are both acceptable.