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Help CenterEN10305-1 E355 H8 Honed Steel Tube BKS
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E355 H8 Honed Steel Tubing BKSUS$ 1,200 - 2,000MOQ: 1 Ton
Commodity: EN10305-1 E355 H8 honed steel tube BKS
Types: cold drawn or cold rolled seamless tubes suitable for honing or skiving and roller burnishing, honed tubes,and skived and roller burnished tubes
Standard specification&material: EN 10305-1 E355,C45E,25CrMo4,34CrMo4,42CrMo4 and equivalent standard and material.
Size range:
Tubes suitable for honing or skiving and roller burnishing: 40mm*30mm - 325mm*300mm
Honed tubes: 40mm*30mm - 480mm*450mm
Skived and roller burnished tubes: 73mm*63mm - 300mm*280mm
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 DIN2391-1
ID tolerance of tubes suitable for honing or skiving and roller burnishing: given by customer
ID tolerance of honed tubes or skived and roller burnished tubes: H7,H8,H9,H10 or given by customer.
W.T tolerance(eccentricity): +/-5%
Bore roughness(Ra): 0.25um max for skived and roller burnished tubes, 0.4um max for honed tubes.
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 |
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.
External machining or external polishing service can be provided.
End machining service provided.
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 receipt of tubes
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