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Precision Seamless Black Phosphated Hydraulic Steel Tubes

Product Description

International Standards:

This product complies with various international standards for precision seamless steel tubes, including:

Product Advantages

Specification

Specification	Details
Material	Carbon Steel (Commonly ST37.4)
Standard	Customizable to various standards (e.g., EN 10305, DIN 2391)
Finish	Black Phosphated (for corrosion resistance)
Outer Diameter (OD)	4 mm to 60 mm
Wall Thickness (WT)	0.5 mm to 5 mm
Length	Custom lengths available (standard 6 meters)
Surface Treatment	Phosphating (for corrosion protection)

Dimension

Cold Drawn/Rolled Seamless Precision Steel Tubes Confirming To DIN2391;EN10305-1;EN10305-4

OD	Thickness（mm）
mm	Thickness（mm）
6	6*1	6*1.5
8	8*1	8*1.5	8*2
10	10*1	10*1.5	10*2
12	12*1	12*1.5	12*2	12*2.5
14	14*1	14*1.5	14*2	14*2.5	14*3
15	15*1	15*1.5	15*2	15*2.5	15*3
16	16*1	16*1.5	16*2	16*2.5	16*3
18		18*1.5	18*2	18*2.5	18*3	18*3.5	18*4
20		20*1.5	20*2	20*2.5	20*3	20*3.5	20*4
22		22*1.5	22*2	22*2.5	22*3	22*3.5	22*4
25			25*2	25*2.5	25*3	25*3.5	25*4
28			28*2	28*2.5	28*3	28*3.5	28*4
30			30*2	30*2.5	30*3	30*3.5	30*4	30*4.5	30*5
32			32*2	32*2.5	32*3	32*3.5	32*4	32*4.5	32*5
34			34*2	34*2.5	34*3	34*3.5	34*4	34*4.5	34*5	34*6
35			35*2	35*2.5	35*3	35*3.5	35*4	35*4.5	35*5	35*6
38			38*2	38*2.5	38*3	38*3.5	38*4	38*4.5	38*5	38*6
40				40*2.5	40*3	40*3.5	40*4	40*4.5	40*5	40*6
42				42*2.5	42*3	42*3.5	42*4	42*4.5	42*5	42*6
45				45*2.5	45*3	45*3.5	45*4	45*4.5	45*5	45*6
46				46*2.5	46*3	46*3.5	46*4	46*4.5	46*5	46*6
48				48*2.5	48*3	48*3.5	48*4	48*4.5	48*5	48*6
50				50*2.5	50*3	50*3.5	50*4	50*4.5	50*5	50*6
54					54*3	54*3.5	54*4	54*4.5	54*5	54*6
60					60*3	60*3.5	60*4	60*4.5	60*5	60*6	60*8
Note: 1. We can produce other specification as your requirements. 2. Surface treatment: Bright, galvanized (yellow, white, colorful), phosphated，army green passivation.

Features

- - Corrosion Resistance: The black phosphated surface treatment offers excellent protection against corrosion and rust, making it ideal for hydraulic applications.
  - Precision Dimensions: The seamless manufacturing and cold drawing process ensure high dimensional accuracy, which is essential for proper integration into hydraulic systems.
  - Improved Lubrication: The phosphated surface enhances the lubrication properties, which is critical in reducing friction and wear during fluid transport.
  - Durability: The carbon steel material, combined with phosphating, provides long-lasting performance even under high-pressure conditions.

Manufacturing Process

Seamless Tube Formation: The tube is made using the seamless manufacturing process, which eliminates the need for welding and ensures uniform strength and durability.
Cold Drawing: The steel tube is cold drawn to precise dimensions and smooth surface finish.
Phosphating: A black phosphate coating is applied to the tube’s surface, which provides corrosion resistance and improves lubrication properties.
Heat Treatment: The tube undergoes annealing or other heat treatment processes to relieve internal stresses and enhance mechanical properties.
Final Inspection: The tubes are tested for dimensional accuracy, surface finish, and performance under high-pressure conditions.

Hydraulic Systems: These tubes are widely used in hydraulic systems for power transmission in industries such as construction, automotive, and manufacturing.
Fluid Transport: The tubes are designed to handle high-pressure fluids and are commonly used in fluid transport applications where reliability and strength are essential.
Automotive Applications: For use in vehicle hydraulic systems like brake lines, power steering, and suspension systems.
Industrial Machinery: These tubes are used in various industrial machines that require reliable fluid transfer, such as presses, pumps, and other heavy machinery.
Construction Equipment: The tubes are perfect for use in construction machinery, such as excavators, cranes, and loaders, which rely on hydraulic systems for power transmission.

Black: The tube has a black appearance due to the phosphating treatment, which is typically used for corrosion resistance and enhanced performance in hydraulic applications.

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