DIN2391 ST35 ST52 Hydraulic Seamless Precision Steel Tubes
Standard: DIN 2391 EN 10305-1/4
Material:ST35,ST37.4,ST45,ST52.4 etc
Size: OD:4-76mm, Wall thickness:0.5-8mm
| Hydraulic steel tube |
| Standard | | Material | Delivery | Surface | Sizes |
| DIN | 2391/1630/2445 | ST37.4 ST52.4 | NBK | 1) BA 2) 2)Black phosphating 3)Galvanizing | OD2 -60mm WT0.3-10mm |
| EN | 10305-4 | E235 E355 | (+)N | |
| BS | 3602 | CFS 360 | | Zinc Layer, thickness more than 8um |
| Other steel grades also available upon request |
Delivery Condition: BK(+C), BKW(+LC), BKS(+SR), GBK(+A),NBK( +N)
| BK (+C) Cold finished/hard | No heat treatment after the last cold forming process. |
| BKW (+LC) Cold finished/soft | After the last heat treatment there is a light finishing pass (cold drawing). |
| BKS (+SR) Cold finished/stress relieve annealed. | After the final cold forming process the tubes are stress relieve annealed. |
| GBK (+A) Annealed. | After the final cold forming process the tubes are annealed in a controlled atmosphere. |
| NBK (+N) Normalized. | After the final cold forming process the tubes are annealed above the upper transformation point in a controlled atmosphere |
Surface:
NBK, Galvanization/Galvanized/Zinc Coated, Blue White Zinc (Trivalent Chromium Passivation),
Plating Colour Zinc(Trivalent Chromium Passivation), Yellow, Army-Green, Phosphated/Black Phosphated
Surface quality:
Without oxidization, No crack, No fold, No rolling fold, No scar, No laminar defect
Main feature:
High precision
Excellent brightness
No oxidization on outer and inner walls after heat treatment
High cleanness of inside wall
High pressure
No deformation after clod bending
No crack after flaring and flattening
Production routing:
Quality carbon steel from bao steel etc big mill, cold drawing the heat treatment without oxidization , NBK condition.
Do nondestructive testing ,HT tests and do dipping oil antirust protection, Packed tube in wooden boxes.
Application: Hydraulic system, Automobile
Packing Details : In bundles or in wooden boxes packaging
Q: Are you trading company or manufacturer ?
A: A professional steel pipes materials inventor, manufacturer and solution provider
Q: How long is your delivery time?
A: Generally it is 7-14 days if the goods are in stock. or it is 30-60 days if the goods are not in stock, it is according to quantity.
Q: Do you provide samples of carbon seamless steel tube ? is it free or extra ?
A: Yes, we could offer the sample for free charge but need pay the cost of freight.
Q: What is your terms of payment ?
A: Payment<=1000USD, 100% in advance. Payment>=1000USD, 30% T/T in advance ,balance before shippment.
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