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Phosphated Steel Tubes for Hydraulic Systems

Product Description

This product complies with several international standards to ensure quality and consistency:

EN 10305: European standard for precision steel tubes.
DIN 2391: German standard for seamless steel tubes for hydraulic applications.

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

- - Enhanced Corrosion Resistance: The phosphating coating provides excellent protection against corrosion, making the tubes suitable for harsh environmental conditions.
  - High Strength and Toughness: Cold drawing and annealing ensure the tubes have excellent strength and toughness, ideal for high-pressure and demanding applications.
  - Precise Dimensions: The cold drawing process ensures precise outer diameter, wall thickness, and length.
  - Excellent Surface Quality: The phosphated surface is smooth and offers good adhesion, making it suitable for further processing or coating.

Specifications

Specification	Details
Material	Carbon steel (commonly ST37.4,E235.)
Standards	EN 10305, DIN 2391
Surface Treatment	Phosphating coating
Outer Diameter (OD)	4 mm to 120 mm
Length	Customizable (Standard: 6 meters)
Surface Finish	Phosphated coating for corrosion resistance

Manufacturing Process

Raw Material Preparation: High-quality carbon steel (such asST37.4 E235) is chosen for its excellent mechanical properties.
Seamless Tubing Formation: Tubes are formed using seamless technology to ensure uniformity and absence of seams.
Cold Drawing: Cold drawing is applied to achieve precise dimensions, smooth surface, and enhanced strength.
Phosphating Coating: A phosphating layer is applied to the tube surface, providing corrosion protection. This process involves a chemical reaction that forms a metal phosphate protective film.
Annealing: Optional annealing is performed to improve mechanical properties and eliminate stress generated by cold working.
Quality Inspection: Each tube undergoes rigorous dimensional, surface, and mechanical performance testing to meet standards and requirements.

Main Applications

Hydraulic Systems: Widely used in hydraulic systems for fluid transmission and power transfer.
Industrial Equipment: Suitable for high-pressure fluid transmission, such as in hydraulic pumps and cylinders.
Automotive Industry: Used in automotive hydraulic systems, such as steering systems and brake lines.
Construction Machinery: Employed in heavy machinery like excavators and cranes to ensure stable operation of hydraulic systems.
Heat Exchange Systems: Suitable for heat exchange systems requiring corrosion resistance and high pressure endurance.