Commodity: DIN2391-2 ST52 seamless precision honed tube

Standard specification&grade: ASTM A519 SAE4130,SAE4140,SAE4020,SAE1026,SAE1045,SAE4154,etc and equivalent material of EN10305-1 E355,E410,E470,25CrMo4,34CrMo4,42CrMo4,DIN2391-2 ST52.

Size range:70mm*60mm-325mm*300mm

Manufacture method: hydraulic cold drawn

Delivery condition: BK(+C), BKW(+LC),BKS(+SR),GBK(+A),NBK(+N),Q+T.

Bore treatment: skiving&roller burnishing or honing.

ID tolerance: H8,H9 or as per customer's requirement.

Roughness of internal surface: 0.35um max.

Straightness: 0.5mm/1000mm max.

Packing: in bundles tied with steel strips. Internal&external oil caoting. End plastic caps.

Shipment: we suggest shipment effected by containers on FCL basis.

Based on our facilities, the following services are available:

1. Honing

2. Skiving&roller burnishing

3. Deep hole boring

4. Polishing

5. Grinding

6. Machining

We are specialized manufacturer of hydraulic cold drawn mechanical tubing,precision tubes,and cylinder tubes.

Guarantee&warranty: 6 months after shipment of cargo.

Payment:T/T, L/C, D/P are all acceptable.