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Introduction to ST 37.4 Hydraulic Seamless Tube

Introduction to ST 37.4 Hydraulic Seamless Tube
 
ST 37.4 Hydraulic Seamless Tube is a specialized seamless steel tube designed for hydraulic systems, characterized by high pressure resistance, corrosion resistance, and precision machining. Below is a detailed description of this tubing:
 
ST 37.4 Hydraulic Seamless Tube Chemical Composition and Mechanical Properties
 

Component

Typical Values (%)

Mechanical Properties

Carbon (C)

≤0.17

Yield Strength: ≥235 MPa

Manganese (Mn)

0.40-1.20

Tensile Strength: 360-480 MPa

Silicon (Si)

≤0.55

Elongation: ≥25%

Phosphorus (P)

≤0.035

Impact Value: No fracture at -20 (J) ≥27

Sulfur (S)

≤0.025

Bend Test: Diameter of bend ≤3 times the wall thickness

 
ST 37.4 Hydraulic Seamless Tube Manufacturing Process and Tolerance Requirements
 
- Manufacturing Process: Utilizes cold drawing, cold rolling, and other precision machining processes to ensure dimensional accuracy and surface quality.
- Tolerance Requirements: Conforms to DIN 2391 standards, ensuring stability of dimensions within specified tolerances to ensure compatibility with other hydraulic components.
 
ST 37.4 Hydraulic Seamless Tube Standard Size Specifications
 

Outer Diameter (mm)

Wall Thickness (mm)

Nominal Size (mm)

4

0.5

4x0.5

6

1

6x1

8

1

8x1

10

1

10x1

12

1

12x1

 
ST 37.4 Hydraulic Seamless Tube Surface Treatment Methods
 
- Bright Annealing: The tube undergoes annealing treatment, resulting in a smooth surface free from oxides, enhancing machining performance and corrosion resistance.
- Phosphating: Phosphating treatment is applied to the tube surface, enhancing corrosion resistance and surface hardness, suitable for use in harsh environments.
- Oil Coating: The tube surface is coated with a thin layer of rust-proof oil to prevent oxidation corrosion, improving weather resistance and suitable for long-term storage and transportation.
- Galvanization: The tube surface is coated with a layer of zinc, enhancing its corrosion resistance and extending its service life, commonly used in outdoor or humid environments.
 
ST 37.4 Hydraulic Seamless Tube Application Fields and Industries
 
- Application Fields: Hydraulic systems, engineering machinery, automotive manufacturing, aerospace, etc.
- Industries: Mechanical manufacturing, automotive industry, aerospace industry, engineering construction, etc.
 
ST 37.4 Hydraulic Seamless Tube Performance Characteristics
 
- High Pressure Resistance: Capable of withstanding the working pressure of high-pressure hydraulic systems, ensuring system stability.
- Corrosion Resistance: Exhibits excellent corrosion resistance, suitable for various working environments and media.
- Precision Machining: High dimensional accuracy and small tolerance range, suitable for applications with strict requirements on tube dimensions.
 
ST 37.4 Hydraulic Seamless Tube Compliance with Standards and Quality Assurance
 
- Conforms to DIN 2391 standards, ensuring stability of product dimensions, chemical composition, and mechanical properties.
- Strict quality control measures are implemented, including material inspection, process control, and product testing, ensuring reliable product quality.
 
In summary, ST 37.4 Hydraulic Seamless Tube offers outstanding performance and finds wide applications across various industries. It serves as a reliable tubing option for hydraulic systems and engineering applications.
ST 37.4 Hydraulic Seamless Tubes

ST 37.4 Hydraulic Seamless Tube

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